10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________

Form 10-K

(Mark One)
þ	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	FOR THE FISCAL YEAR ENDED DECEMBER 31, 2018
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	FOR THE TRANSITION PERIOD FROM   TO

	Registrant, State or Other Jurisdiction  of Incorporation or Organization
Commission file number	Address of Principal Executive Offices, Zip Code  and Telephone Number	I.R.S. Employer Identification No.
1-31447	CenterPoint Energy, Inc.	74-0694415
	(a Texas corporation)
	1111 Louisiana
	Houston, Texas 77002
	(713-207-1111)
1-3187	CenterPoint Energy Houston Electric, LLC	22-3865106
	(a Texas limited liability company)
	1111 Louisiana
	Houston, Texas 77002
	(713-207-1111)
1-13265	CenterPoint Energy Resources Corp.	76-0511406
	(a Delaware corporation)
	1111 Louisiana
	Houston, Texas 77002
	(713-207-1111)
Securities registered pursuant to Section 12(b) of the Act:
Registrant	Title of each class	Name of each exchange on which registered
CenterPoint Energy, Inc.	Common Stock, $0.01 par value	New York Stock Exchange Chicago Stock Exchange
CenterPoint Energy, Inc.	Depositary shares, each representing a 1/20th interest in a share of 7.00% Series B Mandatory Convertible Preferred Stock, $0.01 par value	New York Stock Exchange
CenterPoint Energy Houston Electric, LLC	9.15% First Mortgage Bonds due 2021	New York Stock Exchange
CenterPoint Energy Houston Electric, LLC	6.95% General Mortgage Bonds due 2033	New York Stock Exchange
CenterPoint Energy Resources Corp.	6.625% Senior Notes due 2037	New York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act:
	None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

CenterPoint Energy, Inc.	Yes þ	No o
CenterPoint Energy Houston Electric, LLC	Yes þ	No o
CenterPoint Energy Resources Corp.	Yes þ	No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  

CenterPoint Energy, Inc.	Yes o	No þ
CenterPoint Energy Houston Electric, LLC	Yes o	No þ
CenterPoint Energy Resources Corp.	Yes o	No þ

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  

CenterPoint Energy, Inc.	Yes þ	No o
CenterPoint Energy Houston Electric, LLC	Yes þ	No o
CenterPoint Energy Resources Corp.	Yes þ	No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). 

CenterPoint Energy, Inc.	Yes þ	No o
CenterPoint Energy Houston Electric, LLC	Yes þ	No o
CenterPoint Energy Resources Corp.	Yes þ	No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. 

CenterPoint Energy, Inc.	þ
CenterPoint Energy Houston Electric, LLC	þ
CenterPoint Energy Resources Corp.	þ

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and “emerging growth company” in Rule 12b-2 of the Exchange Act.

	Large accelerated filer	Accelerated filer	Non-accelerated filer	Smaller reporting company	Emerging growth company
CenterPoint Energy, Inc.	þ	o	o	o	o
CenterPoint Energy Houston Electric, LLC	o	o	þ	o	o
CenterPoint Energy Resources Corp.	o	o	þ	o	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

CenterPoint Energy, Inc.	Yes o	No þ
CenterPoint Energy Houston Electric, LLC	Yes o	No þ
CenterPoint Energy Resources Corp.	Yes o	No þ

The aggregate market values of the voting stock held by non-affiliates of the Registrants as of June 29, 2018 are as follows:

CenterPoint Energy, Inc. (using the definition of beneficial ownership contained in Rule 13d-3 promulgated pursuant to Securities Exchange Act of 1934 and excluding shares held by directors and executive officers)	$11,873,304,802
CenterPoint Energy Houston Electric, LLC	None
CenterPoint Energy Resources Corp.	None

Indicate the number of shares outstanding of each of the issuers’ classes of common stock as of  February 12, 2019:

CenterPoint Energy, Inc.	501,206,304 shares of common stock outstanding, excluding 166 shares held as treasury stock
CenterPoint Energy Houston Electric, LLC	1,000 common shares outstanding, all held by Utility Holding, LLC, a wholly-owned subsidiary of CenterPoint Energy, Inc.
CenterPoint Energy Resources Corp.	1,000 shares of common stock outstanding, all held by Utility Holding, LLC, a wholly-owned subsidiary of CenterPoint Energy, Inc.

CenterPoint Energy Houston Electric, LLC and CenterPoint Energy Resources Corp. meet the conditions set forth in general instruction I(1)(a) and (b) of Form 10-K and are therefore filing this Form 10-K with the reduced disclosure format specified in General Instruction I(2) of Form 10-K.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the definitive proxy statement relating to the 2019 Annual Meeting of Shareholders of CenterPoint Energy, which will be filed with the Securities and Exchange Commission within 120 days of December 31, 2018, are incorporated by reference in Item 10, Item 11, Item 12, Item 13 and Item 14 of Part III of this Form 10-K.

TABLE OF CONTENTS

PART I
		Page
Item 1.	Business	1
Item 1A.	Risk Factors	19
Item 1B.	Unresolved Staff Comments	45
Item 2.	Properties	45
Item 3.	Legal Proceedings	46
Item 4.	Mine Safety Disclosures	46
PART II
Item 5.	Market for Registrants’ Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	46
Item 6.	Selected Financial Data	47
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	47
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	81
Item 8.	Financial Statements and Supplementary Data	84
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	164
Item 9A.	Controls and Procedures	165
Item 9B.	Other Information	167
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	167
Item 11.	Executive Compensation	167
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	167
Item 13.	Certain Relationships and Related Transactions, and Director Independence	168
Item 14.	Principal Accounting Fees and Services	168
PART IV
Item 15.	Exhibits and Financial Statement Schedules	169
Item 16.	Form 10-K Summary	169

i

GLOSSARY
ADFIT	Accumulated deferred federal income taxes
ADMS	Advanced Distribution Management System
AEM	Atmos Energy Marketing, LLC, previously a wholly-owned subsidiary of Atmos Energy Holdings, Inc., a wholly-owned subsidiary of Atmos Energy Corporation
AFUDC	Allowance for funds used during construction
AMAs	Asset Management Agreements
AMS	Advanced Metering System
APSC	Arkansas Public Service Commission
ARAM	Average rate assumption method
ARO	Asset retirement obligation
ARP	Alternative revenue program
ASC	Accounting Standards Codification
ASU	Accounting Standards Update
AT&T	AT&T Inc.
AT&T Common	AT&T common stock
Bcf	Billion cubic feet
Bond Companies	Bankruptcy remote entities wholly-owned by Houston Electric and formed solely for the purpose of purchasing and owning transition or system restoration property through the issuance of Securitization Bonds, consisting of Bond Company II, Bond Company III, Bond Company IV and Restoration Bond Company
Bond Company II	CenterPoint Energy Transition Bond Company II, LLC, a wholly-owned subsidiary of Houston Electric
Bond Company III	CenterPoint Energy Transition Bond Company III, LLC, a wholly-owned subsidiary of Houston Electric
Bond Company IV	CenterPoint Energy Transition Bond Company IV, LLC, a wholly-owned subsidiary of Houston Electric
Brazos Valley Connection	A portion of the Houston region transmission project between Houston Electric’s Zenith substation and the Gibbons Creek substation owned by the Texas Municipal Power Agency
Bridge Facility	A $5 billion 364-day senior unsecured bridge term loan facility
CCR	Coal Combustion Residuals
CEA	Commodities Exchange Act of 1936
CECL	Current expected credit losses
CEIP	CenterPoint Energy Intrastate Pipelines, LLC
CenterPoint Energy	CenterPoint Energy, Inc., and its subsidiaries
CERC Corp.	CenterPoint Energy Resources Corp.
CERC	CERC Corp., together with its subsidiaries
CERCLA	Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended
CES	CenterPoint Energy Services, Inc., a wholly-owned subsidiary of CERC Corp.
CFTC	Commodity Futures Trading Commission
Charter Common	Charter Communications, Inc. common stock
Charter merger	Merger of Charter Communications, Inc. and Time Warner Cable Inc.
CIP	Conservation Improvement Program
CME	Chicago Mercantile Exchange
CNG	Compressed natural gas
CNP Midstream	CenterPoint Energy Midstream, Inc., a wholly-owned subsidiary of CenterPoint Energy
COLI	Corporate-owned life insurance

ii

GLOSSARY
Common Stock	CenterPoint Energy, Inc. common stock, par value $0.01 per share
Continuum	The retail energy services business of Continuum Retail Energy Services, LLC, including its wholly-owned subsidiary Lakeshore Energy Services, LLC and the natural gas wholesale assets of Continuum Energy Services, LLC
CPP	Clean Power Plan
CSIA	Compliance and System Improvement Adjustment
DCA	Distribution Contractors Association
DCRF	Distribution Cost Recovery Factor
Dodd-Frank Act	Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010
DOT	U.S. Department of Transportation
DRR	Distribution Replacement Rider
DSMA	Demand Side Management Adjustment
Dth	Dekatherms
EDIT	Excess deferred income taxes
EECR	Energy Efficiency Cost Recovery
EECRF	Energy Efficiency Cost Recovery Factor
EGT	Enable Gas Transmission, LLC
Enable	Enable Midstream Partners, LP
Enable GP	Enable GP, LLC, Enable’s general partner
Enable Series A Preferred Units	Enable’s 10% Series A Fixed-to-Floating Non-Cumulative Redeemable Perpetual Preferred Units, representing limited partner interests in Enable
EPA	Environmental Protection Agency
EPAct of 2005	Energy Policy Act of 2005
ERCOT	Electric Reliability Council of Texas
ERCOT ISO	ERCOT Independent System Operator
ERISA	Employee Retirement Income Security Act of 1974
ERO	Electric Reliability Organization
ESG	Energy Systems Group, LLC, a wholly-owned subsidiary of Vectren
ESPC	Energy Savings Performance Contracting
FERC	Federal Energy Regulatory Commission
Fitch	Fitch Ratings, Inc.
FRP	Formula Rate Plan
Gas Daily	Platts gas daily indices
GenOn	GenOn Energy, Inc.
GHG	Greenhouse gases
GMES	Government Mandated Expenditure Surcharge
GRIP	Gas Reliability Infrastructure Program
GWh	Gigawatt-hours
Houston Electric	CenterPoint Energy Houston Electric, LLC and its subsidiaries
HVAC	Heating, ventilation and air conditioning
IBEW	International Brotherhood of Electrical Workers
ICA	Interstate Commerce Act of 1887
IG	Intelligent Grid
Indiana Electric	Operations of SIGECO’s electric transmission and distribution services, and includes its power generating and wholesale power operations
Indiana Gas	Indiana Gas Company, Inc., a wholly-owned subsidiary of Vectren
Infrastructure Services	Provides underground pipeline construction and repair services through Vectren’s wholly-owned subsidiaries Miller Pipeline, LLC and Minnesota Limited, LLC

iii

GLOSSARY
Internal Spin	CERC’s contribution of its equity investment in Enable to CNP Midstream (detailed in Note 11 to the consolidated financial statements)
IRP	Integrated Resource Plan
IRS	Internal Revenue Service
IURC	Indiana Utility Regulatory Commission
kV	Kilovolt
LIBOR	London Interbank Offered Rate
LNG	Liquefied natural gas
LPSC	Louisiana Public Service Commission
LTIPs	Long-term incentive plans
Meredith	Meredith Corporation
Merger	The merger of Merger Sub with and into Vectren on the terms and subject to the conditions set forth in the Merger Agreement, with Vectren continuing as the surviving corporation and as a wholly-owned subsidiary of CenterPoint Energy, Inc., which closed on February 1, 2019
Merger Agreement	Agreement and Plan of Merger, dated as of April 21, 2018, among CenterPoint Energy, Vectren and Merger Sub
Merger Sub	Pacer Merger Sub, Inc., an Indiana corporation and wholly-owned subsidiary of CenterPoint Energy
MES	Mobile Energy Solutions
MGP	Manufactured gas plant
MISO	Midcontinent Independent System Operator
MLP	Master Limited Partnership
MMBtu	One million British thermal units
MMcf	Million cubic feet
Moody’s	Moody’s Investors Service, Inc.
MP2017	2017 pension mortality improvement scale developed annually by the Society of Actuaries
MP2018	2018 pension mortality improvement scale developed annually by the Society of Actuaries
MPSC	Mississippi Public Service Commission
MPUC	Minnesota Public Utilities Commission
MRT	Enable-Mississippi River Transmission, LLC
MW	Megawatt
NECA	National Electrical Contractors Association
NERC	North American Electric Reliability Corporation
NESHAPS	National Emission Standards for Hazardous Air Pollutants
NGA	Natural Gas Act of 1938
NGD	Natural gas distribution business
NGLs	Natural gas liquids
NGPA	Natural Gas Policy Act of 1978
NGPSA	Natural Gas Pipeline Safety Act of 1968
NOPR	Notice of Proposed Rulemaking
NRG	NRG Energy, Inc.
NYMEX	New York Mercantile Exchange
NYSE	New York Stock Exchange
OCC	Oklahoma Corporation Commission
OGE	OGE Energy Corp.
OPEIU	Office & Professional Employees International Union

iv

GLOSSARY
PBRC	Performance Based Rate Change
PHMSA	Pipeline and Hazardous Materials Safety Administration
PLCA	Pipeline Contractors Association
PRPs	Potentially responsible parties
PUCT	Public Utility Commission of Texas
Railroad Commission	Railroad Commission of Texas
RCRA	Resource Conservation and Recovery Act of 1976
Registrants	CenterPoint Energy, Houston Electric and CERC, collectively
Reliant Energy	Reliant Energy, Incorporated
REP	Retail electric provider
Restoration Bond Company	CenterPoint Energy Restoration Bond Company, LLC, a wholly-owned subsidiary of Houston Electric
Revised Policy Statement	Revised Policy Statement on Treatment of Income Taxes
RICE MACT	Reciprocating Internal Combustion Engines Maximum Achievable Control Technology
ROE	Return on equity
RRA	Rate Regulation Adjustment
RRI	Reliant Resources, Inc.
RSP	Rate Stabilization Plan
SEC	Securities and Exchange Commission
SESH	Southeast Supply Header, LLC
Securitization Bonds	Transition and system restoration bonds
Series A Preferred Stock	CenterPoint Energy’s Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share, with a liquidation preference of $1,000 per share
Series B Preferred Stock	CenterPoint Energy’s 7.00% Series B Mandatory Convertible Preferred Stock, par value $0.01 per share, with a liquidation preference of $1,000 per share
SIGECO	Southern Indiana Gas and Electric Company, a wholly-owned subsidiary of Vectren
S&P	S&P Global Ratings
TCEH Corp.	Formerly Texas Competitive Electric Holdings Company LLC, predecessor to Vistra Energy Corp. whose major subsidiaries include Luminant and TXU Energy
TCJA	Tax reform legislation informally called the Tax Cuts and Jobs Act of 2017
TCOS	Transmission Cost of Service
TDSIC	Transmission, Distribution and Storage System Improvement Charge
TDU	Transmission and distribution utility
Time	Time Inc.
Time Common	Time common stock
Transition Agreements	Services Agreement, Employee Transition Agreement, Transitional Seconding Agreement and other agreements entered into in connection with the formation of Enable
Texas RE	Texas Reliability Entity
TW	Time Warner Inc.
TW Common	TW common stock
UESC	Utility Energy Services Contract
USW	United Steelworkers Union

v

GLOSSARY
Utility Holding	Utility Holding, LLC, a wholly-owned subsidiary of CenterPoint Energy
VaR	Value at Risk
Vectren	Vectren Corporation
VEDO	Vectren Energy Delivery of Ohio, Inc., a wholly-owned subsidiary of Vectren
VIE	Variable interest entity
Vistra Energy Corp.	Texas-based energy company focused on the competitive energy and power generation markets
VUHI	Vectren Utility Holdings, Inc., a wholly-owned subsidiary of Vectren
WACC	Weighted average cost of capital
ZENS	2.0% Zero-Premium Exchangeable Subordinated Notes due 2029
ZENS-Related Securities	As of December 31, 2018, consisted of AT&T Common and Charter Common and as of December 31, 2017, consisted of Charter Common, Time Common and TW Common
2002 Act	Pipeline Safety Improvement Act of 2002
2006 Act	Pipeline Inspection, Protection, Enforcement and Safety Act of 2006
2011 Act	Pipeline Safety, Regulatory Certainty, and Job Creation Act of 2011
2016 Act	Protecting our Infrastructure of Pipelines and Enhancing Safety Act of 2016

vi

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

From time to time the Registrants make statements concerning their expectations, beliefs, plans, objectives, goals, strategies, future events or performance and underlying assumptions and other statements that are not historical facts. These statements are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those expressed or implied by these statements. You can generally identify forward-looking statements by the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “objective,” “plan,” “potential,” “predict,” “projection,” “should,” “target,” “will” or other similar words.

The Registrants have based their forward-looking statements on management’s beliefs and assumptions based on information reasonably available to management at the time the statements are made. The Registrants caution you that assumptions, beliefs, expectations, intentions and projections about future events may and often do vary materially from actual results. Therefore, the Registrants cannot assure you that actual results will not differ materially from those expressed or implied by the Registrants’ forward-looking statements. In this Form 10-K, unless context requires otherwise, the terms “our,” “we” and “us” are used as abbreviated references to CenterPoint Energy, Inc. together with its consolidated subsidiaries, including Houston Electric, CERC, and, as of February 1, 2019, Vectren and its subsidiaries.

Some of the factors that could cause actual results to differ from those expressed or implied by the Registrants’ forward-looking statements are described under “Risk Factors” in Item 1A and “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Certain Factors Affecting Future Earnings” and “ — Liquidity and Capital Resources — Other Matters — Other Factors That Could Affect Cash Requirements” in Item 7 of this report, which discussions are incorporated herein by reference.

You should not place undue reliance on forward-looking statements. Each forward-looking statement speaks only as of the date of the particular statement, and the Registrants undertake no obligation to update or revise any forward-looking statements.

vii

PART I

Item 1. Business

This combined Form 10-K is filed separately by three registrants: CenterPoint Energy, Inc., CenterPoint Energy Houston Electric, LLC and CenterPoint Energy Resources Corp. Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. Each registrant makes no representation as to information relating exclusively to the other registrants. Except as discussed in Note 14 to the consolidated financial statements, no registrant has an obligation in respect of any other registrant’s debt securities, and holders of such debt securities should not consider the financial resources or results of operations of any registrant other than the obligor in making a decision with respect to such securities.

The discussion of CenterPoint Energy’s consolidated financial information includes the financial results of Houston Electric and CERC, which, along with CenterPoint Energy, are collectively referred to as the Registrants. Where appropriate, information relating to a specific registrant has been segregated and labeled as such. Unless the context indicates otherwise, specific references to Houston Electric and CERC also pertain to CenterPoint Energy. In this Form 10-K, the terms “our,” “we” and “us” are used as abbreviated references to CenterPoint Energy, Inc. together with its consolidated subsidiaries, which, as of February 1, 2019, includes Vectren and its subsidiaries.

OUR BUSINESS

Overview

CenterPoint Energy is a public utility holding company and owns interests in Enable. As of December 31, 2018, CenterPoint Energy’s operating subsidiaries, Houston Electric and CERC Corp., owned and operated electric transmission and distribution and natural gas distribution facilities and supplied natural gas to commercial and industrial customers and electric and natural gas utilities.

CenterPoint Energy’s simplified corporate structure as of December 31, 2018 is shown below:

(1) Houston Electric engages in the electric transmission and distribution business in the Texas Gulf Coast area that includes the city of Houston.

(2) Bond Companies are wholly-owned, bankruptcy remote entities formed solely for the purpose of purchasing and owning transition or system restoration property through the issuance of Securitization Bonds.

(3) NGD operates natural gas distribution systems in six states.

1

(4) CES obtains and offers competitive variable and fixed-price physical natural gas supplies and services primarily to commercial and industrial customers and electric and natural gas utilities in over 30 states.

(5) As of December 31, 2018, CNP Midstream owned approximately 54.0% of the common units representing limited partner interests in Enable, which owns, operates and develops natural gas and crude oil infrastructure assets; CNP Midstream also owned 50% of the management rights and 40% of the incentive distribution rights in Enable GP. For additional information regarding CenterPoint Energy’s interest in Enable, including the 14,520,000 Enable Series A Preferred Units directly owned by CenterPoint Energy, see Note 11 to the consolidated financial statements.

CenterPoint Energy’s service territories as of December 31, 2018 are depicted below:

As of December 31, 2018, reportable segments by Registrant are as follows:

	Electric Transmission & Distribution	Natural Gas Distribution	Energy  Services	Midstream Investments	Other Operations
CenterPoint Energy	X	X	X	X	X
Houston Electric	X
CERC		X	X		X

For a discussion of operating income by segment, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Results of Operations by Reportable Segment” in Item 7 of Part II of this report. For additional information about the segments, see Note 19 to the consolidated financial statements. From time to time, we consider the acquisition or the disposition of assets or businesses.

On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. For further discussion of the Merger and a description of Vectren’s businesses, see Note 4 to the consolidated financial statements.

2

Following the Merger, CenterPoint Energy’s simplified corporate structure as of February 1, 2019 is shown below:

The Registrants’ principal executive offices are located at 1111 Louisiana, Houston, Texas 77002 (telephone number: 713-207-1111).

We make available free of charge on our Internet website our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as soon as reasonably practicable after we electronically file such reports with, or furnish them to, the SEC. The SEC maintains an Internet website that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC at http://www.sec.gov. Additionally, we make available free of charge on our Internet website:

• our Code of Ethics for our Chief Executive Officer and Senior Financial Officers;

• our Ethics and Compliance Code;

• our Corporate Governance Guidelines; and

• the charters of the audit, compensation, finance and governance committees of our Board of Directors.

Any shareholder who so requests may obtain a printed copy of any of these documents from us. Changes in or waivers of our Code of Ethics for our Chief Executive Officer and Senior Financial Officers and waivers of our Ethics and Compliance Code for directors or executive officers will be posted on our Internet website within five business days of such change or waiver and maintained for at least 12 months or timely reported on Item 5.05 of Form 8-K.

Our website address is www.centerpointenergy.com. Investors should also note that we announce material financial information in SEC filings, press releases and public conference calls. Based on guidance from the SEC, we may use the investor relations section of our website to communicate with our investors. It is possible that the financial and other information posted there could be deemed to be material information. Except to the extent explicitly stated herein, documents and information on our website are not incorporated by reference herein.

Electric Transmission & Distribution (CenterPoint Energy and Houston Electric)

Houston Electric is a transmission and distribution electric utility that operates wholly within the state of Texas and is a member of ERCOT. ERCOT serves as the independent system operator and regional reliability coordinator for member electric power systems in most of Texas. The ERCOT market represents approximately 90% of the demand for power in Texas and is one of the nation’s largest power markets. The ERCOT market operates under the reliability standards developed by the NERC, approved by the FERC and monitored and enforced by the Texas RE. The PUCT has primary jurisdiction over the ERCOT market to ensure the adequacy and reliability of electricity supply across the state’s main interconnected power transmission grid. Houston Electric does not make direct retail or wholesale sales of electric energy or own or operate any electric generating facilities.

3

Houston Electric’s distribution service territory as of December 31, 2018 is depicted below:

Electric Transmission

On behalf of REPs, Houston Electric delivers electricity from power plants to substations, from one substation to another and to retail electric customers taking power at or above 69 kV in locations throughout Houston Electric’s certificated service territory. Houston Electric constructs and maintains transmission facilities and provides transmission services under tariffs approved by the PUCT.

The ERCOT ISO is responsible for operating the bulk electric power supply system in the ERCOT market. Houston Electric’s transmission business, along with those of other owners of transmission facilities in Texas, supports the operation of the ERCOT ISO. Houston Electric participates with the ERCOT ISO and other ERCOT utilities to plan, design, obtain regulatory approval for and construct new transmission lines necessary to increase bulk power transfer capability and to remove existing constraints on the ERCOT transmission grid.

Electric Distribution

In ERCOT, end users purchase their electricity directly from certificated REPs. Houston Electric’s distribution network receives electricity from the transmission grid through power distribution substations and delivers electricity for REPs in its certificated service area by carrying lower-voltage power from the substation to the retail electric customer through distribution feeders. Houston Electric’s operations include construction and maintenance of distribution facilities, metering services, outage response services and call center operations. Houston Electric provides distribution services under tariffs approved by the PUCT. PUCT rules and market protocols govern the commercial operations of distribution companies and other market participants. Rates for these existing services are established pursuant to rate proceedings conducted before municipalities that have original jurisdiction and the PUCT.

Bond Companies

Houston Electric has special purpose subsidiaries consisting of the Bond Companies, which it consolidates. The consolidated special purpose subsidiaries are wholly-owned, bankruptcy remote entities that were formed solely for the purpose of purchasing and owning transition or system restoration property through the issuance of Securitization Bonds, and conducting activities incidental thereto. The Securitization Bonds are repaid through charges imposed on customers in Houston Electric’s service territory.  For further discussion of the Securitization Bonds and the outstanding balances as of December 31, 2018 and 2017, see Note 14 to the consolidated financial statements.

Customers

Houston Electric serves nearly all of the Houston/Galveston metropolitan area. At December 31, 2018, Houston Electric’s customers consisted of approximately 65 REPs, which sell electricity to approximately 2.5 million metered customers in Houston

4

Electric’s certificated service area, and municipalities, electric cooperatives and other distribution companies located outside Houston Electric’s certificated service area. Each REP is licensed by, and must meet minimum creditworthiness criteria established by, the PUCT. Houston Electric does not have long-term contracts with any of its customers. It operates using a continuous billing cycle, with meter readings being conducted and invoices being distributed to REPs each business day. For information regarding Houston Electric’s major customers, see Note 19 to the consolidated financial statements. The table below reflects the number of metered customers in Houston Electric’s service area as of December 31, 2018:

	Residential	Commercial/ Industrial	Total Customers
Texas Gulf Coast	2,198,225	287,145	2,485,370

Utility Technology

Houston Electric’s Smart Grid is comprised of the AMS, IG, ADMS and private telecommunications network. Since 2009, Houston Electric has deployed fully operational advanced meters to virtually all of its approximately 2.5 million metered customers, automated 57 substations, installed 1,525 IG Switching Devices on more than 350 circuits, built a wireless radio frequency mesh telecommunications network across Houston Electric’s 5,000-square mile footprint, and enabled real-time grid monitoring and control, which leverages information from smart meters and field sensors to manage system events through the ADMS. The Smart Grid continues to improve electric distribution service reliability and restoration, enhance the consumer experience, support the growth of renewable energy and help the environment by reducing carbon emissions.

Competition

There are no other electric transmission and distribution utilities in Houston Electric’s service area. For another provider of transmission and distribution services to provide such services in Houston Electric’s territory, it would be required to obtain a certificate of convenience and necessity from the PUCT and, depending on the location of the facilities, may also be required to obtain franchises from one or more municipalities. Houston Electric is not aware of any other party intending to enter this business in its service area at this time. Distributed generation (i.e., power generation located at or near the point of consumption) could result in a reduction of demand for Houston Electric’s distribution services but has not been a significant factor to date.

Seasonality

Houston Electric’s revenues are primarily derived from rates that it collects from each REP based on the amount of electricity it delivers on behalf of that REP. Houston Electric’s revenues and results of operations are subject to seasonality, weather conditions and other changes in electricity usage, with revenues generally being higher during the warmer months when more electricity is used for cooling purposes.

Properties

All of Houston Electric’s properties are located in Texas. Its properties consist primarily of high-voltage electric transmission lines and poles, distribution lines, substations, service centers, service wires, telecommunications network and meters. Most of Houston Electric’s transmission and distribution lines have been constructed over lands of others pursuant to easements or along public highways and streets under franchise agreements and as permitted by law.

All real and tangible properties of Houston Electric, subject to certain exclusions, are currently subject to:

• the lien of a Mortgage and Deed of Trust (the Mortgage) dated November 1, 1944, as supplemented; and

• the lien of a General Mortgage (the General Mortgage) dated October 10, 2002, as supplemented, which is junior to the lien of the Mortgage.

For information related to debt outstanding under the Mortgage and General Mortgage, see Note 14 to the consolidated financial statements.

5

Electric Lines - Transmission and Distribution. As of December 31, 2018, Houston Electric owned and operated the following electric transmission and distribution lines:

	Circuit Miles
Description	Overhead Lines	Underground Lines
Transmission lines - 69 kV	266	2
Transmission lines - 138 kV	2,207	24
Transmission lines - 345 kV	1,336	—
Total transmission lines	3,809	26
Distribution lines	29,094	25,255

Substations.  As of December 31, 2018, Houston Electric owned 235 major substation sites having a total installed rated transformer capacity of 68,338 megavolt amperes.

Service Centers.  As of December 31, 2018, Houston Electric operated 15 regional service centers located on a total of 332 acres of land. These service centers consist of office buildings, warehouses and repair facilities that are used in the business of transmitting and distributing electricity.

Franchises

Houston Electric holds non-exclusive franchises from certain incorporated municipalities in its service territory. In exchange for the payment of fees, these franchises give Houston Electric the right to use the streets and public rights-of-way of these municipalities to construct, operate and maintain its transmission and distribution system and to use that system to conduct its electric delivery business and for other purposes that the franchises permit. The terms of the franchises, with various expiration dates, typically range from 20 to 40 years.

Natural Gas Distribution (CenterPoint Energy and CERC)

CERC’s NGD engages in regulated intrastate natural gas sales to, and natural gas transportation and storage for, approximately 3.5 million residential, commercial, industrial and transportation customers in Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma and Texas. The largest metropolitan areas served in each state by CERC’s NGD are Houston, Texas; Minneapolis, Minnesota; Little Rock, Arkansas; Shreveport, Louisiana; Biloxi, Mississippi; and Lawton, Oklahoma. CERC’s NGD also provides unregulated services in Minnesota consisting of residential appliance repair and maintenance services along with HVAC equipment sales.

CERC’s NGD’s service territory as of December 31, 2018 is depicted below:

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Customers

In 2018, approximately 40% of CERC’s NGD’s total throughput was to residential customers and approximately 60% was to commercial and industrial and transportation customers. The table below reflects the number of CERC’s NGD customers by state as of December 31, 2018:

	Residential	Commercial/ Industrial	Total Customers
Arkansas	377,290	47,963	425,253
Louisiana	230,234	16,648	246,882
Minnesota	797,907	70,604	868,511
Mississippi	114,694	12,628	127,322
Oklahoma	88,685	10,783	99,468
Texas	1,637,467	101,407	1,738,874
Total NGD	3,246,277	260,033	3,506,310

Seasonality

The demand for natural gas sales to residential customers and natural gas sales and transportation for commercial and industrial customers is seasonal. In 2018, approximately 68% of CERC’s NGD’s total throughput occurred in the first and fourth quarters. These patterns reflect the higher demand for natural gas for heating purposes during the colder months.

Supply and Transportation.  In 2018, CERC’s NGD purchased virtually all of its natural gas supply pursuant to contracts with remaining terms varying from a few months to four years. Major suppliers in 2018 included the following:

Supplier	Percent of Supply Volumes
Tenaska Marketing Ventures	18.5%
Macquarie Energy, LLC	13.1%
BP Energy Company/BP Canada Energy Marketing	10.3%
Sequent Energy Management, LP	7.6%
Kinder Morgan Tejas Pipeline/Kinder Morgan Texas Pipeline	5.6%
Mieco, Inc.	5.4%
Spire Marketing, Inc.	3.4%
United Energy Trading, LLC	3.1%
CIMA Energy, LTD	3.0%
Koch Energy Services, LLC	2.6%

Numerous other suppliers provided the remaining 27.4% of CERC’s NGD’s natural gas supply requirements. CERC’s NGD transports its natural gas supplies through various intrastate and interstate pipelines under contracts with remaining terms, including extensions, varying from one to fifteen years. CERC’s NGD anticipates that these gas supply and transportation contracts will be renewed or replaced prior to their expiration.

CERC’s NGD actively engages in commodity price stabilization pursuant to annual gas supply plans presented to and/or filed with each of its state regulatory authorities. These price stabilization activities include use of storage gas and contractually establishing structured prices (e.g., fixed price, costless collars and caps) with CERC’s NGD’s physical gas suppliers. Its gas supply plans generally call for 50–75% of winter supplies to be stabilized in some fashion.

The regulations of the states in which CERC’s NGD operates allow it to pass through changes in the cost of natural gas, including savings and costs of financial derivatives associated with the index-priced physical supply, to its customers under purchased gas adjustment provisions in its tariffs. Depending upon the jurisdiction, the purchased gas adjustment factors are updated periodically, ranging from monthly to semi-annually. The changes in the cost of gas billed to customers are subject to review by the applicable regulatory bodies.

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CERC’s NGD uses various third-party storage services or owned natural gas storage facilities to meet peak-day requirements and to manage the daily changes in demand due to changes in weather. CERC’s NGD may also supplement contracted supplies and storage from time to time with stored LNG and propane-air plant production.

CERC’s NGD owns and operates an underground natural gas storage facility with a capacity of 7.0 Bcf. It has a working capacity of 2.0 Bcf available for use during the heating season and a maximum daily withdrawal rate of 50 MMcf. It also owns eight propane-air plants with a total production rate of 180,000 Dth per day and on-site storage facilities for 12 million gallons of propane (1.0 Bcf natural gas equivalent). It owns a LNG plant facility with a 12 million-gallon LNG storage tank (1.0 Bcf natural gas equivalent) and a production rate of 72,000 Dth per day.

On an ongoing basis, CERC’s NGD enters into contracts to provide sufficient supplies and pipeline capacity to meet its customer requirements. However, it is possible for limited service disruptions to occur from time to time due to weather conditions, transportation constraints and other events. As a result of these factors, supplies of natural gas may become unavailable from time to time, or prices may increase rapidly in response to temporary supply constraints or other factors.

CERC’s NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, CERC’s NGD’s third-party AMAs in Arkansas, Louisiana and Oklahoma expired, and CERC’s NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, CERC’s NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost. Generally, AMAs are contracts between CERC’s NGD and an asset manager that are intended to transfer the working capital obligation and maximize the utilization of the assets. In these agreements, CERC’s NGD agrees to release transportation and storage capacity to other parties to manage natural gas storage, supply and delivery arrangements for CERC’s NGD and to use the released capacity for other purposes when it is not needed for CERC’s NGD. CERC’s NGD is compensated by the asset manager through payments made over the life of the AMAs. CERC’s NGD has an obligation to purchase its winter storage requirements that have been released to the asset manager under these AMAs.

Assets

As of December 31, 2018, CERC’s NGD owned approximately 76,000 linear miles of natural gas distribution mains, varying in size from one-half inch to 24 inches in diameter. Generally, in each of the cities, towns and rural areas served by CERC’s NGD, it owns the underground gas mains and service lines, metering and regulating equipment located on customers’ premises and the district regulating equipment necessary for pressure maintenance. With a few exceptions, the measuring stations at which CERC’s NGD receives gas are owned, operated and maintained by others, and its distribution facilities begin at the outlet of the measuring equipment. These facilities, including odorizing equipment, are usually located on land owned by suppliers.

Competition

CERC’s NGD competes primarily with alternate energy sources such as electricity and other fuel sources. In some areas, intrastate pipelines, other gas distributors and marketers also compete directly for gas sales to end users. In addition, as a result of federal regulations affecting interstate pipelines, natural gas marketers operating on these pipelines may be able to bypass CERC’s NGD’s facilities and market and sell and/or transport natural gas directly to commercial and industrial customers.

Energy Services (CenterPoint Energy and CERC)

CERC offers competitive variable and fixed-priced physical natural gas supplies primarily to commercial and industrial customers and electric and natural gas utilities through CES and its subsidiary, CEIP, collectively, Energy Services.

In 2018, CES marketed approximately 1,355 Bcf of natural gas (including approximately 33 Bcf to affiliates) and provided related energy services and transportation to approximately 30,000 customers in over 30 states. CES customers vary in size from small commercial customers to large utility companies. Not included in the 2018 customer count are approximately 65,000 natural gas customers that are served under residential and small commercial choice programs invoiced by their host utility.  These customers are not included in customer count so as not to distort the significant margin impact from the remaining customer base.

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Energy Services’ service territory as of December 31, 2018 is depicted below:

In 2017, CES completed the acquisition of AEM, providing CES with a portfolio of industrial and large commercial customers complementary to CES’s existing customer base and strategically aligned storage and transportation assets. For further information related to this acquisition, see Note 4 to the consolidated financial statements.

CES offers a variety of natural gas management services to gas utilities, large industrial customers, electric generators, smaller commercial and industrial customers, municipalities, educational institutions, government facilities and hospitals. These services include load forecasting, supply acquisition, daily swing volume management, invoice consolidation, storage asset management, firm and interruptible transportation administration and forward price management. CES also offers a portfolio of physical delivery services designed to meet customers’ supply and risk management needs. These services include (1) through CEIP, permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies and (2) through MES, temporary delivery of LNG and CNG throughout the lower 48 states, utilizing a fleet of customized equipment to provide continuity of natural gas service when pipeline supply is not available.

In addition to offering natural gas management services, CES procures and optimizes transportation and storage assets. CES maintains a portfolio of natural gas supply contracts and firm transportation and storage agreements to meet the natural gas requirements of its customers. CES aggregates supply from various producing regions and offers contracts to buy natural gas with terms ranging from one month to over five years. In addition, CES actively participates in the spot natural gas markets in an effort to balance daily and monthly purchases and sales obligations. Natural gas supply and transportation capabilities are leveraged through contracts for ancillary services including physical storage and other balancing arrangements.

As described above, CES offers its customers a variety of load following services. In providing these services, CES uses its customers’ purchase commitments to forecast and arrange its own supply purchases, storage and transportation services to serve customers’ natural gas requirements. As a result of the variance between this forecast activity and the actual monthly activity, CES will either have too much supply or too little supply relative to its customers’ purchase commitments. These supply imbalances arise each month as customers’ natural gas requirements are scheduled and corresponding natural gas supplies are nominated by CES for delivery to those customers. CES’s processes and risk control policy are designed to measure and value imbalances on a real-time basis to ensure that CES’s exposure to commodity price risk is kept to a minimum. The value assigned to these imbalances is calculated daily and is known as the aggregate VaR.

CenterPoint Energy’s and CERC’s risk control policy, which is overseen by CenterPoint Energy’s Risk Oversight Committee, defines authorized and prohibited trading instruments and trading limits. CES is a physical marketer of natural gas and uses a variety of tools, including pipeline and storage capacity, financial instruments and physical commodity purchase contracts, to support its sales. CES optimizes its use of these various tools to minimize its supply costs and does not engage in speculative commodity trading. CES currently operates within a VaR limit set by CenterPoint Energy’s Board of Directors, consistent with CES’ operational objective of matching its aggregate sales obligations (including the swing associated with load following services)

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with its supply portfolio in a manner that minimizes its total cost of supply. Should CES exceed this VaR limit, management is required to notify CenterPoint Energy’s Board of Directors.

Assets

As of December 31, 2018, CEIP owned and operated over 200 miles of intrastate pipeline in Louisiana and Texas. In addition, CES leases transportation capacity on various interstate and intrastate pipelines and storage to service its shippers and end users.

Competition

CES competes with regional and national wholesale and retail gas marketers, including the marketing divisions of natural gas producers and utilities. In addition, CES competes with intrastate pipelines for customers and services in its market areas.

Midstream Investments (CenterPoint Energy)

CenterPoint Energy’s Midstream Investments reportable segment consists of its equity method investment in Enable. Enable is a publicly traded MLP, jointly controlled by CenterPoint Energy (indirectly through CNP Midstream) and OGE as of December 31, 2018. 

On September 4, 2018, CERC completed the Internal Spin of its equity investment in Enable, consisting of Enable common units and its interests in Enable GP, to CenterPoint Energy. For further discussion of the Internal Spin, see Note 11 to the consolidated financial statements.

Enable. Enable owns, operates and develops midstream energy infrastructure assets strategically located to serve its customers. Enable’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Enable’s gathering and processing segment primarily provides natural gas gathering and processing to its producer customers and crude oil, condensate and produced water gathering services to its producer and refiner customers. Enable’s transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to its producer, power plant, local distribution company and industrial end-user customers.

Enable’s Gathering and Processing segment. Enable owns and operates substantial natural gas and crude oil gathering and natural gas processing assets in five states. Enable’s gathering and processing operations consist primarily of natural gas gathering and processing assets serving the Anadarko, Arkoma and Ark-La-Tex Basins and crude oil gathering assets serving the Anadarko and Williston Basins. Enable provides a variety of services to the active producers in its operating areas, including gathering, compressing, treating, and processing natural gas, fractionating NGLs, and gathering crude oil and produced water. Enable serves shale and other unconventional plays in the basins in which it operates.

Enable’s gathering and processing systems compete with gatherers and processors of all types and sizes, including those affiliated with various producers, other major pipeline companies and various independent midstream entities. In the process of selling NGLs, Enable competes against other natural gas processors extracting and selling NGLs. Enable’s primary competitors are other midstream companies who are active in the regions where it operates. Enable’s management views the principal elements of competition for its gathering and processing systems as gathering rate, processing value, system reliability, fuel rate, system run time, construction cycle time and prices at the wellhead.

Enable’s Transportation and Storage segment. Enable owns and operates interstate and intrastate natural gas transportation and storage systems across nine states. Enable’s transportation and storage systems consist primarily of its interstate systems, its intrastate system and its investment in SESH. Enable’s transportation and storage assets transport natural gas from areas of production and interconnected pipelines to power plants, local distribution companies and industrial end users as well as interconnected pipelines for delivery to additional markets. Enable’s transportation and storage assets also provide facilities where natural gas can be stored by customers.

Enable’s interstate and intrastate pipelines compete with a variety of other interstate and intrastate pipelines across its operating areas in providing transportation and storage services, including several pipelines with which it interconnects. Enable’s management views the principal elements of competition among pipelines as rates, terms of service, flexibility and reliability of service.

For information related to CenterPoint Energy’s equity method investment in Enable, see Note 2(c) and Note 11 to the consolidated financial statements.

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Other Operations (CenterPoint Energy and CERC)

CenterPoint Energy’s Other Operations reportable segment includes office buildings and other real estate used for business operations, home repair protection plans through a third party and other corporate support operations that support CenterPoint Energy’s business operations. CERC’s Other Operations reportable segment includes unallocated corporate costs and inter-segment eliminations.

Vectren Operations

Upon closing of the Merger on February 1, 2019, Vectren became a direct wholly-owned subsidiary of CenterPoint Energy. Vectren, through its wholly-owned subsidiary, VUHI, holds three public utilities, SIGECO, Indiana Gas and VEDO, which provide electric and natural gas utility services.  SIGECO provides energy delivery services to electric and natural gas customers located near Evansville in southwestern Indiana and is a transmission-owning member of MISO, a regional transmission organization. SIGECO also owns and operates 1,252 MWs of electric generation assets to serve its electric customers and optimizes those assets in the wholesale power market.  Indiana Gas provides energy delivery services to natural gas customers located in central and southern Indiana. VEDO provides energy delivery services to natural gas customers located near Dayton in west-central Ohio. Vectren’s utility service territory is depicted below:

 Vectren is also involved in non-utility activities in two primary business areas: Infrastructure Services and energy services, provided through ESG. Infrastructure Services provides underground pipeline construction and repair services. ESG’s energy services include providing energy performance contracting and sustainable infrastructure, such as renewables, distributed generation and combined heat and power projects.

For further discussion of the Merger, see Note 4 to the consolidated financial statements.

REGULATION

The Registrants are subject to regulation by various federal, state and local governmental agencies, including the regulations described below. The following discussion is based on regulation in the Registrants’ businesses and CenterPoint Energy’s investment in Enable as of December 31, 2018 and does not include Vectren-related regulation.

Federal Energy Regulatory Commission

The FERC has jurisdiction under the NGA and the NGPA, as amended, to regulate the transportation of natural gas in interstate commerce and natural gas sales for resale in interstate commerce that are not first sales. The FERC regulates, among other things, the construction of pipeline and related facilities used in the transportation and storage of natural gas in interstate commerce, including the extension, expansion or abandonment of these facilities. The FERC has authority to prohibit market manipulation in connection with FERC-regulated transactions, to conduct audits and investigations, and to impose significant civil penalties (up to approximately $1.27 million per day per violation, subject to periodic adjustment to account for inflation) for statutory violations and violations of the FERC’s rules or orders. CenterPoint Energy’s and CERC’s Energy Services reportable segment markets natural gas in interstate commerce pursuant to blanket authority granted by the FERC.

Houston Electric is not a “public utility” under the Federal Power Act and, therefore, is not generally regulated by the FERC, although certain of its transactions are subject to limited FERC jurisdiction. The FERC has certain responsibilities with respect

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to ensuring the reliability of electric transmission service, including transmission facilities owned by Houston Electric and other utilities within ERCOT. The FERC has designated the NERC as the ERO to promulgate standards, under FERC oversight, for all owners, operators and users of the bulk power system (Electric Entities). The ERO and the FERC have authority to (a) impose fines and other sanctions on Electric Entities that fail to comply with approved standards and (b) audit compliance with approved standards. The FERC has approved the delegation by the NERC of authority for reliability in ERCOT to the Texas RE. Houston Electric does not anticipate that the reliability standards proposed by the NERC and approved by the FERC will have a material adverse impact on its operations. To the extent that Houston Electric is required to make additional expenditures to comply with these standards, it is anticipated that Houston Electric will seek to recover those costs through the transmission charges that are imposed on all distribution service providers within ERCOT for electric transmission provided.

As a public utility holding company, under the Public Utility Holding Company Act of 2005, CenterPoint Energy and its consolidated subsidiaries are subject to reporting and accounting requirements and are required to maintain certain books and records and make them available for review by the FERC and state regulatory authorities in certain circumstances.

State and Local Regulation – Electric Transmission & Distribution (CenterPoint Energy and Houston Electric)

Houston Electric conducts its operations pursuant to a certificate of convenience and necessity issued by the PUCT that covers its present service area and facilities. The PUCT and certain municipalities have the authority to set the rates and terms of service provided by Houston Electric under cost-of-service rate regulation. Houston Electric holds non-exclusive franchises from certain incorporated municipalities in its service territory. In exchange for payment of fees, these franchises give Houston Electric the right to use the streets and public rights-of-way of these municipalities to construct, operate and maintain its transmission and distribution system and to use that system to conduct its electric delivery business and for other purposes that the franchises permit. The terms of the franchises, with various expiration dates, typically range from 20 to 40 years.

Houston Electric’s distribution rates charged to REPs for residential and small commercial customers are primarily based on amounts of energy delivered, whereas distribution rates for a majority of large commercial and industrial customers are primarily based on peak demand. All REPs in Houston Electric’s service area pay the same rates and other charges for transmission and distribution services. This regulated delivery charge includes the transmission and distribution rate (which includes municipal franchise fees), a distribution recovery mechanism for recovery of incremental distribution-invested capital above that which is already reflected in the base distribution rate, a nuclear decommissioning charge associated with decommissioning the South Texas nuclear generating facility, an EECR charge, and charges associated with securitization of regulatory assets, stranded costs and restoration costs relating to Hurricane Ike. Transmission rates charged to distribution companies are based on amounts of energy transmitted under “postage stamp” rates that do not vary with the distance the energy is being transmitted. All distribution companies in ERCOT pay Houston Electric the same rates and other charges for transmission services.

For a discussion of certain of Houston Electric’s ongoing regulatory proceedings, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Regulatory Matters” in Item 7 of Part II of this report, which discussion is incorporated herein by reference.

State and Local Regulation – Natural Gas Distribution (CenterPoint Energy and CERC)

In almost all communities in which CERC’s NGD provides natural gas distribution services, NGD operates under franchises, certificates or licenses obtained from state and local authorities. The original terms of the franchises, with various expiration dates, typically range from 10 to 30 years, although franchises in Arkansas are perpetual. NGD expects to be able to renew expiring franchises. In most cases, franchises to provide natural gas utility services are not exclusive.

Substantially all of NGD is subject to cost-of-service rate regulation by the relevant state public utility commissions and, in Texas, by the Railroad Commission and those municipalities served by NGD that have retained original jurisdiction. In certain of its jurisdictions, NGD has annual rate adjustment mechanisms that provide for changes in rates dependent upon certain changes in invested capital, earned returns on equity or actual margins realized.

For a discussion of certain of NGD’s ongoing regulatory proceedings, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Regulatory Matters” in Item 7 of Part II of this report, which discussion is incorporated herein by reference.

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Department of Transportation (CenterPoint Energy and CERC)

In December 2006, Congress enacted the 2006 Act, which reauthorized the programs adopted under the 2002 Act. These programs included several requirements related to ensuring pipeline safety, and a requirement to assess the integrity of pipeline transmission facilities in areas of high population concentration.

Pursuant to the 2006 Act, PHMSA, an agency of the DOT, issued regulations, effective February 12, 2010, requiring operators of gas distribution pipelines to develop and implement integrity management programs similar to those required for gas transmission pipelines, but tailored to reflect the differences in distribution pipelines. Operators of natural gas distribution systems were required to write and implement their integrity management programs by August 2, 2011. CenterPoint Energy’s and CERC’s natural gas distribution systems met this deadline.

Pursuant to the 2002 Act and the 2006 Act, PHMSA has adopted a number of rules concerning, among other things, distinguishing between gathering lines and transmission facilities, requiring certain design and construction features in new and replaced lines to reduce corrosion and requiring pipeline operators to amend existing written operations and maintenance procedures and operator qualification programs. PHMSA also updated its reporting requirements for natural gas pipelines effective January 1, 2011.

In December 2011, Congress passed the 2011 Act. This act increased the maximum civil penalties for pipeline safety administrative enforcement actions; required the DOT to study and report on the expansion of integrity management requirements and the sufficiency of existing gathering line regulations to ensure safety; required pipeline operators to verify their records on maximum allowable operating pressure; and imposed new emergency response and incident notification requirements. In 2016, the 2016 Act reauthorized PHMSA’s pipeline safety programs through 2019 and provided limited new authority, including the ability to issue emergency orders, to set inspection requirements for certain underwater pipelines and to promulgate minimum safety standards for natural gas storage facilities, as well as to provide increased transparency into the status of as-yet-incomplete PHMSA actions required by the 2011 Act.

CenterPoint Energy and CERC anticipate that compliance with PHMSA’s regulations, performance of the remediation activities by CenterPoint Energy’s and CERC’s natural gas distribution companies and intrastate pipelines and verification of records on maximum allowable operating pressure will continue to require increases in both capital expenditures and operating costs. The level of expenditures will depend upon several factors, including age, location and operating pressures of the facilities. In particular, the cost of compliance with the DOT’s integrity management rules will depend on integrity testing and the repairs found to be necessary by such testing. Changes to the amount of pipe subject to integrity management, whether by expansion of the definition of the type of areas subject to integrity management procedures or of the applicability of such procedures outside of those defined areas, may also affect the costs incurred. Implementation of the 2011 and 2016 Acts by PHMSA may result in other regulations or the reinterpretation of existing regulations that could impact compliance costs. In addition, CenterPoint Energy and CERC may be subject to the DOT’s enforcement actions and penalties if they fail to comply with pipeline regulations.

Midstream Investments – Rate and Other Regulation (CenterPoint Energy)

Federal, state, and local regulation may affect certain aspects of Enable’s business.

Interstate Natural Gas Pipeline Regulation

Enable’s interstate pipeline systems—EGT, MRT and SESH—are subject to regulation by the FERC and are considered “natural gas companies” under the NGA. Under the NGA, the rates for service on Enable’s interstate facilities must be just and reasonable and not unduly discriminatory. Rate and tariff changes for these facilities can only be implemented upon approval by the FERC. Enable’s interstate pipelines business operations may be affected by changes in the demand for natural gas, the available supply and relative price of natural gas in the Mid-continent and Gulf Coast natural gas supply regions and general economic conditions.

Market Behavior Rules; Posting and Reporting Requirements

The EPAct of 2005 amended the NGA to add an anti-manipulation provision that makes it unlawful for any entity to engage in prohibited behavior as prescribed in FERC rules, which were subsequently issued in FERC Order No. 670. The EPAct of 2005 also amends the NGA and the NGPA to give the FERC authority to impose civil penalties for violations of these statutes and FERC’s regulations, rules, and orders, of up to approximately $1.27 million per day per violation, subject to periodic adjustment to account for inflation. Should Enable fail to comply with all applicable FERC-administered statutes, rules, regulations and orders, it could be subject to substantial penalties and fines. In addition, the CFTC is directed under the CEA to prevent price manipulations

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for the commodity and futures markets, including the energy futures markets. Pursuant to the Dodd-Frank Act and other authority, the CFTC has adopted anti-market manipulation regulations that prohibit fraud and price manipulation in the commodity and futures markets. The CFTC also has statutory authority to seek civil penalties of up to the greater of $1.2 million or triple the monetary gain to the violator for violations of the anti-market manipulation sections of the CEA. These maximum penalty levels are also subject to periodic adjustment to account for inflation.

Intrastate Natural Gas Pipeline and Storage Regulation

Intrastate natural gas transportation is largely regulated by the state in which the transportation takes place. However, an intrastate natural gas pipeline system may transport natural gas in interstate commerce provided that the rates, terms, and conditions of such transportation service comply with Section 311 of the NGPA and Part 284 of the FERC’s regulations. Rates for service pursuant to Section 311 of the NGPA are generally subject to review and approval by the FERC at least once every five years. Failure to observe the service limitations applicable to transportation services provided under Section 311, failure to comply with the rates approved by the FERC for Section 311 service, or failure to comply with the terms and conditions of service established in the pipeline’s FERC-approved Statement of Operating Conditions could result in the assertion of federal NGA jurisdiction by the FERC and/or the imposition of administrative, civil and criminal penalties, as described under “—Interstate Natural Gas Pipeline Regulation” above.

Natural Gas Gathering and Processing Regulation

Section 1(b) of the NGA exempts natural gas gathering facilities from the jurisdiction of the FERC. Although the FERC has not made formal determinations with respect to all of the facilities Enable considers to be gathering facilities, Enable believes that its natural gas pipelines meet the traditional tests that the FERC has used to determine that a pipeline is a gathering pipeline and is therefore not subject to FERC jurisdiction. The distinction, however, has been the subject of substantial litigation, and the FERC determines whether facilities are gathering facilities on a case-by-case basis, so the classification and regulation of Enable’s gathering facilities is subject to change based on future determinations.

States may regulate gathering pipelines. State regulation generally includes various safety, environmental and, in some circumstances, anti-discrimination requirements, and in some instances complaint-based rate regulation. Enable’s gathering operations may be subject to ratable take and common purchaser statutes in the states in which they operate.

Enable’s gathering operations could be adversely affected should they be subject in the future to the application of state or federal regulation of rates and services. Enable’s gathering operations could also be subject to additional safety and operational regulations relating to the design, construction, testing, operation, replacement and maintenance of gathering facilities. CenterPoint Energy cannot predict what effect, if any, such changes might have on Enable’s operations, but the industry could be required to incur additional capital expenditures and increased costs depending on future legislative and regulatory changes.

Interstate Crude Oil Gathering Regulation

Enable’s crude oil gathering systems in the Williston Basin transport crude oil in interstate commerce pursuant to a public tariff in accordance with FERC regulatory requirements. Crude oil gathering pipelines that transport crude oil in interstate commerce may be regulated as common carriers by the FERC under the ICA, the Energy Policy Act of 1992, and the rules and regulations promulgated under those laws. The ICA and FERC regulations require that rates for interstate service pipelines that transport crude oil and refined petroleum products (collectively referred to as “petroleum pipelines”) and certain other liquids, be just and reasonable and non-discriminatory or not conferring any undue preference upon any shipper. FERC regulations also require interstate common carrier petroleum pipelines to file with the FERC and publicly post tariffs stating their interstate transportation rates and terms and conditions of service.

Intrastate Crude Oil and Condensate Gathering Regulation

Enable’s crude oil and condensate gathering system in the Anadarko Basin is located in Oklahoma and is subject to limited regulation by the OCC. Crude oil and condensate gathering systems are common carriers under Oklahoma law and are prohibited from unjust or unlawful discrimination in favor of one customer over another. Additional rules and legislation pertaining to these matters are considered or adopted from time to time. Enable’s crude oil and condensate gathering operations could be adversely affected should they be subject in the future to the application of state or federal regulation of rates and services.

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Safety and Health Regulation

Certain of Enable’s facilities are subject to pipeline safety regulations. PHMSA regulates safety requirements in the design, construction, operation and maintenance of jurisdictional natural gas and hazardous liquid pipeline facilities. All natural gas transmission facilities, such as Enable’s interstate natural gas pipelines, are subject to PHMSA’s regulations, but natural gas gathering pipelines are subject only to the extent they are classified as regulated gathering pipelines. In addition, several NGL pipeline facilities and crude oil pipeline facilities are regulated as hazardous liquids pipelines.

Pursuant to various federal statutes, including the NGPSA, the DOT, through PHMSA, regulates pipeline safety and integrity. NGL and crude oil pipelines are subject to regulation by PHMSA under the Hazardous Liquid Pipeline Safety Act which requires PHMSA to develop, prescribe, and enforce minimum federal safety standards for the transportation of hazardous liquids by pipeline, and comparable state statutes with respect to design, installation, testing, construction, operation, replacement and management of pipeline facilities. Should Enable fail to comply with DOT or comparable state regulations, it could be subject to penalties and fines. If future DOT pipeline regulations were to require that Enable expand its integrity management program to currently unregulated pipelines, costs associated with compliance may have a material effect on its operations.

ENVIRONMENTAL MATTERS

The following discussion is based on environmental matters in the Registrants’ businesses as of December 31, 2018 and does not include Vectren-related environmental matters. The Registrants’ operations and the operations of Enable are subject to stringent and complex laws and regulations pertaining to the environment. As an owner or operator of natural gas pipelines, distribution systems and storage, electric transmission and distribution systems, and the facilities that support these systems, the Registrants must comply with these laws and regulations at the federal, state and local levels. These laws and regulations can restrict or impact the Registrants’ business activities in many ways, including, but not limited to:

• restricting the way the Registrants can handle or dispose of wastes;

• limiting or prohibiting construction activities in sensitive areas such as wetlands, coastal regions or areas inhabited by endangered species;

• requiring remedial action and monitoring to mitigate environmental conditions caused by the Registrants’ operations or attributable to former operations;

• enjoining the operations of facilities with permits issued pursuant to such environmental laws and regulations; and

• impacting the demand for the Registrants’ services by directly or indirectly affecting the use or price of natural gas.

To comply with these requirements, the Registrants may need to spend substantial amounts and devote other resources from time to time to, among other activities:

• construct or acquire new facilities and equipment;

• acquire permits for facility operations;

• modify, upgrade or replace existing and proposed equipment; and

• decommission or remediate waste management areas, fuel storage facilities and other locations.

Failure to comply with these laws and regulations may trigger a variety of administrative, civil and criminal enforcement measures, including the assessment of monetary penalties, the imposition of remedial actions and monitoring and the issuance of orders enjoining future operations. Certain environmental statutes impose strict, joint and several liability for costs required to assess, clean up and restore sites where hazardous substances have been stored, disposed or released. Moreover, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and/or property damage allegedly caused by the release of hazardous substances or other waste products into the environment.

The recent trend in environmental regulation has been to place more restrictions and limitations on activities that may impact the environment. There can be no assurance as to the amount or timing of future expenditures for environmental compliance or remediation and monitoring, and actual future expenditures may be different from the amounts currently anticipated. The

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Registrants try to anticipate future regulatory requirements that might be imposed and plan accordingly to maintain compliance with changing environmental laws and regulations.

Based on current regulatory requirements and interpretations, the Registrants do not believe that compliance with federal, state or local environmental laws and regulations will have a material adverse effect on their business, financial position, results of operations or cash flows. In addition, the Registrants believe that their current environmental remediation activities will not materially interrupt or diminish their operational ability. The Registrants cannot assure you that future events, such as changes in existing laws, the promulgation of new laws, or the development or discovery of new facts or conditions will not cause them to incur significant costs. The following is a discussion of material current environmental and safety issues, laws and regulations that relate to the Registrants’ operations. The Registrants believe that they are in substantial compliance with these environmental laws and regulations.

Global Climate Change

There is increasing attention being paid in the United States and worldwide to the issue of climate change. As a result, from time to time, regulatory agencies have considered the modification of existing laws or regulations or the adoption of new laws or regulations addressing the emissions of GHG on the state, federal, or international level. Some of the proposals would require industrial sources to meet stringent new standards that would require substantial reductions in GHG emissions. CenterPoint Energy’s and CERC’s revenues, operating costs and capital requirements could be adversely affected as a result of any regulatory action that would require installation of new control technologies or a modification of their operations or would have the effect of reducing the consumption of natural gas. Houston Electric, in contrast to some electric utilities, does not generate electricity and thus is not directly exposed to the risk of high capital costs and regulatory uncertainties that face electric utilities that burn fossil fuels to generate electricity.  Nevertheless, CenterPoint Energy’s and Houston Electric’s revenues could be adversely affected to the extent any resulting regulatory action has the effect of reducing consumption of electricity by ultimate consumers within Houston Electric’s service territory. Likewise, incentives to conserve energy or to use energy sources other than natural gas could result in a decrease in demand for the Registrants’ services.  Conversely, regulatory actions that effectively promote the consumption of natural gas because of its lower emissions characteristics would be expected to beneficially affect CenterPoint Energy and CERC and their natural gas-related businesses.  At this point in time, however, it would be speculative to try to quantify the magnitude of the impacts from possible new regulatory actions related to GHG emissions, either positive or negative, on the Registrants’ businesses.

To the extent climate changes may occur and such climate changes result in warmer temperatures in the Registrants’ or Enable’s service territories, financial results from the Registrants’ and Enable’s businesses could be adversely impacted. For example, CenterPoint Energy’s and CERC’s NGD could be adversely affected through lower natural gas sales and Enable’s natural gas gathering, processing and transportation and crude oil gathering businesses could experience lower revenues. On the other hand, warmer temperatures in CenterPoint Energy’s and Houston Electric’s electric service territory may increase revenues from transmission and distribution through increased demand for electricity for cooling. Another possible result of climate change is more frequent and more severe weather events, such as hurricanes or tornadoes.  Since many of the Registrants’ facilities are located along or near the Gulf Coast, increased or more severe hurricanes or tornadoes could increase costs to repair damaged facilities and restore service to customers. When the Registrants cannot deliver electricity or natural gas to customers, or customers cannot receive services, the Registrants’ financial results can be impacted by lost revenues, and they generally must seek approval from regulators to recover restoration costs.  To the extent the Registrants are unable to recover those costs, or if higher rates resulting from recovery of such costs result in reduced demand for services, the Registrants’ future financial results may be adversely impacted.

Air Emissions

The Registrants’ operations are subject to the federal Clean Air Act and comparable state laws and regulations. These laws and regulations regulate emissions of air pollutants from various industrial sources, including processing plants and compressor stations, and also impose various monitoring and reporting requirements. Such laws and regulations may require pre-approval for the construction or modification of certain projects or facilities expected to produce air emissions or result in the increase of existing air emissions. The Registrants may be required to obtain and strictly comply with air permits containing various emissions and operational limitations, or utilize specific emission control technologies to limit emissions. Failure to comply with these requirements could result in monetary penalties, injunctions, conditions or restrictions on operations, and potentially criminal enforcement actions. The Registrants may be required to incur certain capital expenditures in the future for air pollution control equipment in connection with obtaining and maintaining operating permits and approvals for air emissions.

The EPA has established new air emission control requirements for natural gas and NGLs production, processing and transportation activities. Under the NESHAPS, the EPA established the RICE MACT rule. Compressors and back up electrical

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generators used by CenterPoint Energy’s and CERC’s NGD, and back up electrical generators used by CenterPoint Energy and Houston Electric, are substantially compliant with these laws and regulations.

Water Discharges

The Registrants’ operations are subject to the Federal Water Pollution Control Act of 1972, as amended, also known as the Clean Water Act, and analogous state laws and regulations. These laws and regulations impose detailed requirements and strict controls regarding the discharge of pollutants into waters of the United States. The unpermitted discharge of pollutants, including discharges resulting from a spill or leak incident, is prohibited. The Clean Water Act and regulations implemented thereunder also prohibit discharges of dredged and fill material into wetlands and other waters of the United States unless authorized by an appropriately issued permit. Any unpermitted release of petroleum or other pollutants from the Registrants’ pipelines or facilities could result in fines or penalties as well as significant remedial obligations.

Under the Obama administration, the EPA promulgated a set of rules that included a comprehensive regulatory overhaul of defining “waters of the United States” for the purposes of determining federal jurisdiction. As initially promulgated, these regulations would expand federal jurisdiction under the Clean Water Act and, therefore, have the potential to affect many aspects of the Registrants’ water-related regulatory compliance obligations. However, the new rules were challenged in court, and the U.S. Supreme Court has recently held that any challenge to the rules must be brought in the U.S. district courts rather than directly before the U.S. courts of appeals. As a result, the new definition of the “waters of the United States” is likely to be disputed in litigation for years to come. Additionally, the Trump administration has signaled its intent to repeal and replace the Obama-era rules. In accordance with this intent, the EPA promulgated a rule in early 2018 that postponed the effectiveness of the Obama-era rules until 2020. Thereafter, the EPA proposed a new set of rules that would narrow the Clean Water Act’s jurisdiction. Thus, the fate and content of the regulations defining “waters of the United States” is currently uncertain, and it is not clear when, and even if, they will be enacted. The potential impact of any new “waters of the United States” regulations on the Registrants’ business, liabilities, compliance obligations or profits and revenues is uncertain at this time.

Hazardous Waste

The Registrants’ operations generate wastes, including some hazardous wastes, that are subject to the federal RCRA, and comparable state laws, which impose detailed requirements for the handling, storage, treatment, transport and disposal of hazardous and solid waste. RCRA currently exempts many natural gas gathering and field processing wastes from classification as hazardous waste. Specifically, RCRA excludes from the definition of hazardous waste waters produced and other wastes associated with the exploration, development or production of crude oil and natural gas. However, these oil and gas exploration and production wastes are still regulated under state law and the less stringent non-hazardous waste requirements of RCRA. Moreover, ordinary industrial wastes such as paint wastes, waste solvents, laboratory wastes and waste compressor oils may be regulated as hazardous waste. The transportation of natural gas in pipelines may also generate some hazardous wastes that would be subject to RCRA or comparable state law requirements.

Liability for Remediation

CERCLA, also known as “Superfund,” and comparable state laws impose liability, without regard to fault or the legality of the original conduct, on certain classes of persons responsible for the release of “hazardous substances” into the environment. Classes of PRPs include the current and past owners or operators of sites where a hazardous substance was released and companies that disposed or arranged for the disposal of hazardous substances at offsite locations such as landfills. Although petroleum, as well as natural gas, is expressly excluded from CERCLA’s definition of a “hazardous substance,” in the course of the Registrants’ ordinary operations they do, from time to time, generate wastes that may fall within the definition of a “hazardous substance.” CERCLA authorizes the EPA and, in some cases, third parties to take action in response to threats to the public health or the environment and to recover the costs they incur from the responsible classes of persons. Under CERCLA, the Registrants could potentially be subject to joint and several liability for the costs of cleaning up and restoring sites where hazardous substances have been released, for damages to natural resources, and for associated response and assessment costs, including for the costs of certain health studies.

Liability for Preexisting Conditions

For information about preexisting environmental matters, please see Note 16(d) to the consolidated financial statements.

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EMPLOYEES

The following table sets forth the number of employees by Registrant and reportable segment as of December 31, 2018:

	Number of Employees			Number of Employees Represented by Collective Bargaining Groups
Reportable Segment	CenterPoint Energy	Houston Electric	CERC	CenterPoint Energy	Houston Electric	CERC
Electric Transmission & Distribution	2,800	2,800	—	1,431	1,431	—
Natural Gas Distribution	3,298	—	3,298	1,200	—	1,200
Energy Services	302	—	302	—	—	—
Other Operations	1,577	—	—	127	—	—
Total	7,977	2,800	3,600	2,758	1,431	1,200

For information about the status of collective bargaining agreements, see Note 8(j) to the consolidated financial statements.

EXECUTIVE OFFICERS

(as of February 12, 2019)

Name	Age	Title
Milton Carroll	68	Executive Chairman
Scott M. Prochazka	52	President and Chief Executive Officer and Director
William D. Rogers	58	Executive Vice President and Chief Financial Officer
Tracy B. Bridge	60	Executive Vice President and President, Electric Division
Scott E. Doyle	47	Senior Vice President, Natural Gas Distribution
Joseph J. Vortherms	58	Senior Vice President, Energy Services
Dana C. O’Brien	51	Senior Vice President and General Counsel
Sue B. Ortenstone	62	Senior Vice President and Chief Human Resources Officer

Milton Carroll has served on the Board of Directors of CenterPoint Energy or its predecessors since 1992. He has served as Executive Chairman of CenterPoint Energy since June 2013 and as Chairman from September 2002 until May 2013. Mr. Carroll has served as a director of Halliburton Company since 2006 and Western Gas Holdings, LLC, the general partner of Western Gas Partners, LP, since 2008. He has served as a director of Health Care Service Corporation since 1998 and as its chairman since 2002. He previously served as a director of LyondellBasell Industries N.V. from July 2010 to July 2016 as well as LRE GP, LLC, the general partner of LRR Energy, L.P., from November 2011 to January 2014.

Scott M. Prochazka has served as a Director and President and Chief Executive Officer of CenterPoint Energy since January 1, 2014. He previously served as Executive Vice President and Chief Operating Officer from July 2012 to December 2013; as Senior Vice President and Division President, Electric Operations from May 2011 through July 2012; as Division Senior Vice President, Electric Operations of Houston Electric from February 2009 to May 2011; as Division Senior Vice President, Regional Operations of CERC from February 2008 to February 2009; and as Division Vice President, Customer Service Operations, from October 2006 to February 2008. He currently serves on the Board of Directors of Enable GP, LLC, the general partner of Enable Midstream Partners, LP, and as the Chairman of the Board of Directors for each of Gridwise Alliance and Central Houston, Inc. Mr. Prochazka is also a board member of Edison Electric Institute, Electric Power Research Institute, American Gas Association, Greater Houston Partnership, United Way of Houston, Junior Achievement of South Texas and the Kinder Institute Advisory Board.

William D. Rogers has served as Executive Vice President and Chief Financial Officer of CenterPoint Energy since March 2015. He previously served as Executive Vice President, Finance and Accounting from February 2015 to March 2015. Prior to joining CenterPoint Energy, Mr. Rogers was Vice President and Treasurer of American Water Works Company, Inc., the largest publicly traded U.S. water and wastewater utility company, from October 2010 to January 2015. Mr. Rogers was also the Chief Financial Officer of NV Energy, Inc., an investor-owned utility headquartered in Las Vegas serving approximately 1.5 million electric and gas customers in Nevada and with annual revenues of approximately $3 billion, from February 2007 to February 2010. He has previously served as NV Energy’s vice president of finance, risk and tax, as well as corporate treasurer. Before joining NV Energy in June 2005, Mr. Rogers was a managing director in capital markets at Merrill Lynch and prior to that worked in a similar

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role at JPMorgan Chase in New York. He currently serves on the Boards of Directors of Enable GP, LLC, the general partner of Enable Midstream Partners, LP, the West Point Association of Graduates and Sheltering Arms of New York.

Tracy B. Bridge has served as Executive Vice President and President, Electric Division since February 2014. He previously served as Senior Vice President and Division President, Electric Operations from September 2012 to February 2014; as Senior Vice President and Division President, Gas Distribution Operations from May 2011 to September 2012; as Division Senior Vice President - Support Operations from February 2008 to May 2011; and as Division Vice President Regional Operations of CERC from January 2007 to February 2008. Mr. Bridge has more than 35 years of utility experience. He currently serves as the Chair of the Board of Directors of Rebuilding Together Houston.

Scott E. Doyle has served as Senior Vice President, Natural Gas Distribution since March 2017. With more than 20 years of utility experience, he previously served as Senior Vice President, Regulatory and Public Affairs from February 2014 to March 2017; as Division Vice President, Rates and Regulatory from April 2012 to February 2014; and as Division Vice President, Regional Operations from March 2010 to April 2012. Mr. Doyle currently serves on the boards of Goodwill Industries of Houston and the Southern Gas Association. He previously served on the boards of the Texas Gas Association and the Association of Electric Companies of Texas.

Joseph J. Vortherms has served as Senior Vice President, Energy Services since March 2017. He previously served as Vice President, Energy Services from November 2015 to March 2017; as Vice President, Regional Operations in Minnesota from October 2014 to November 2015; as Division Vice President, Regional Operations from April 2012 to October 2014; and as Director, Home Service Plus from January 2007 to April 2012. Mr. Vortherms currently serves on the Southern Gas Association Executive Council as well as the American Gas Association Scenario Planning Council. He previously served on the boards of the Minnesota Region American Red Cross and the Minnesota Business Partnership.

Dana C. O’Brien has served as Senior Vice President and General Counsel of CenterPoint Energy since May 2014. Additionally, she served as Corporate Secretary of the Company until October 2017. Before joining CenterPoint Energy, Ms. O’Brien was Chief Legal Officer and Chief Compliance Officer and a member of the executive board at CEVA Logistics, a Dutch-based logistics company, from August 2007 to April 2014.  She previously served as the general counsel at EGL, Inc. from October 2005 to July 2007 and Quanta Services, Inc. from January 2001 to October 2005. Ms. O’Brien was appointed as a director of Sterling Construction Company, Inc., a publicly traded company, effective January 1, 2019. She previously served as a member of the Boards of Directors of Ronald McDonald House Houston, Child Advocates, Inc. and the Association of Women Attorneys Foundation.

Sue B. Ortenstone has served as Senior Vice President and Chief Human Resources Officer of CenterPoint Energy since February 2014. Prior to joining CenterPoint Energy, Ms. Ortenstone was Senior Vice President and Chief Administrative Officer at Copano Energy from July 2012 to May 2013. Before joining Copano, she spent more than 30 years at El Paso Corporation and served most recently as Senior Vice President and then Executive Vice President and Chief Administrative Officer from November 2003 to May 2012. Ms. Ortenstone serves on the Industrial Advisory Board in the College of Engineering at the University of Wisconsin. Ms. Ortenstone also serves on the Board of Trustees for Northwest Assistance Ministries of Houston.

Item 1A. Risk Factors

CenterPoint Energy is a holding company that conducts all of its business operations through subsidiaries, primarily Houston Electric, CERC and, as of February 1, 2019, Vectren through its operating subsidiaries. CenterPoint Energy also owns interests in Enable. The following, along with any additional legal proceedings identified or incorporated by reference in Item 3 of this combined report on Form 10-K, summarizes the principal risk factors associated with the holding company, the businesses conducted by its subsidiaries, including Vectren, and its interests in Enable. However, additional risks and uncertainties either not presently known or not currently believed by management to be material may also adversely affect CenterPoint Energy’s businesses. Carefully consider each of the risks described below relating to Houston Electric and CERC, which, along with CenterPoint Energy (including Vectren for purposes of this Item 1A only), are collectively referred to as the Registrants. Unless the context indicates otherwise, where appropriate, information relating to a specific registrant has been segregated and labeled as such and specific references to Houston Electric and CERC in this section also pertain to CenterPoint Energy. In this combined report on Form 10-K, the terms “our,” “we” and “us” are used as abbreviated references to CenterPoint Energy, Inc. together with its subsidiaries, which, as of February 1, 2019, includes Vectren and its subsidiaries.

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Risk Factors Associated with Our Consolidated Financial Condition

CenterPoint Energy is a holding company with no operations or operating assets of its own. As a result, CenterPoint Energy depends on the performance of and distributions from its subsidiaries and from Enable to meet its payment obligations and to pay dividends on its common and preferred stock, and provisions of applicable law or contractual restrictions could limit the amount of those distributions.

CenterPoint Energy derives all of its operating income from, and holds all of its assets through, its subsidiaries, including its interests in Enable. As a result, CenterPoint Energy depends on distributions from its subsidiaries and Enable to meet its payment obligations and to pay dividends on its common and preferred stock. In general, CenterPoint Energy’s subsidiaries are separate and distinct legal entities and have no obligation to provide it with funds for its payment obligations, whether by dividends, distributions, loans or otherwise. In addition, provisions of applicable law, such as those limiting the legal sources of dividends, limit CenterPoint Energy’s subsidiaries’ and Enable’s ability to make payments or other distributions to CenterPoint Energy, and its subsidiaries or Enable could agree to contractual restrictions on their ability to make distributions. Additionally, CenterPoint Energy’s results of operations, future growth and earnings and dividend goals will depend on the performance of its utility and non-utility (such as CES, Infrastructure Services and ESG) subsidiaries which contribute to a portion of its consolidated earnings and which may not perform at expected or forecasted levels or do not achieve the projected growth in these businesses as anticipated. CenterPoint Energy and CERC also offer home repair protection plans to natural gas customers in Texas (through a third-party provider) and provide home appliance maintenance and repair services to customers in Minnesota. For a discussion of risks that may impact the amount of cash distributions CenterPoint Energy receives with respect to its interests in Enable, please read “— Additional Risk Factors Affecting CenterPoint Energy’s Interests in Enable Midstream Partners, LP — CenterPoint Energy’s cash flows will be adversely impacted if it receives less cash distributions from Enable than it currently expects.”

CenterPoint Energy’s right to receive any assets of any subsidiary, and therefore the right of its creditors to participate in those assets, will be structurally subordinated to the claims of that subsidiary’s creditors, including trade creditors. In addition, even if CenterPoint Energy were a creditor of any subsidiary, its rights as a creditor would be effectively subordinated to any security interest in the assets of that subsidiary and any indebtedness of the subsidiary senior to that held by CenterPoint Energy.

If we are unable to arrange future financings on acceptable terms, our ability to finance our capital expenditures orrefinance outstanding indebtedness could be limited.

Our businesses are capital intensive, and we rely on various sources to finance our capital expenditures. For example, we depend on (i) long-term debt, (ii) borrowings through our revolving credit facilities and, for CenterPoint Energy and CERC, commercial paper programs, (iii) distributions from CenterPoint Energy’s interests in Enable (CenterPoint Energy may also depend on the net proceeds from a sale of a portion of Enable common units it owns) and (iv) if market conditions permit, issuances of additional shares of common and/or preferred stock by CenterPoint Energy. We may also use such sources to refinance any outstanding indebtedness as it matures. As of December 31, 2018, CenterPoint Energy had $9.2 billion of outstanding indebtedness on a consolidated basis, which includes $1.4 billion of non-recourse Securitization Bonds. For information on maturities through 2023, see Note 14 to the consolidated financial statements. As of December 31, 2018, Vectren and its subsidiaries had outstanding $167 million of short-term debt and $2.2 billion of long-term debt, including current maturities. Our future financing activities may be significantly affected by, among other things:

• general economic and capital market conditions;

• credit availability from financial institutions and other lenders;

• volatility or fluctuations in distributions from Enable’s units or volatility in Enable’s unit price;

• investor confidence in us and the markets in which we operate;

• the future performance of our and Enable’s businesses;

• integration of Vectren’s businesses into CenterPoint Energy;

• maintenance of acceptable credit ratings;

• market expectations regarding our future earnings and cash flows;

• our ability to access capital markets on reasonable terms;

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• incremental collateral that may be required due to regulation of derivatives; and

• provisions of relevant tax and securities laws.

As of December 31, 2018, Houston Electric had approximately $3.3 billion aggregate principal amount of general mortgage bonds outstanding under the General Mortgage, including approximately $68 million held in trust to secure pollution control bonds for which CenterPoint Energy is obligated. Additionally, as of December 31, 2018, Houston Electric had approximately $102 million aggregate principal amount of first mortgage bonds outstanding under the Mortgage. Houston Electric may issue additional general mortgage bonds on the basis of retired bonds, up to 70% of property additions or cash deposited with the trustee. As of December 31, 2018, approximately $4.3 billion of additional first mortgage bonds and general mortgage bonds in the aggregate could be issued on the basis of retired bonds and 70% of property additions as of December 31, 2018. However, Houston Electric has contractually agreed that it will not issue additional first mortgage bonds, subject to certain exceptions. In January 2019, Houston Electric issued $700 million aggregate principal amount of general mortgage bonds. As of December 31, 2018, Indiana Electric had approximately $293 million aggregate principal amount of first mortgage bonds outstanding. Indiana Electric may issue additional bonds under its Mortgage Indenture up to 60% of currently unfunded property additions. As of December 31, 2018, approximately $1.0 billion of additional first mortgage bonds could be issued on this basis. However, under certain circumstances Indiana Electric is limited in its ability to issue additional bonds under the Mortgage Indenture due to a provision in its parent’s, VUHI, indentures.

The Registrants’ current credit ratings are discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Other Matters — Impact on Liquidity of a Downgrade in Credit Ratings” in Item 7 of Part II of this report. These credit ratings may not remain in effect for any given period of time and one or more of these ratings may be lowered or withdrawn entirely by a rating agency. On January 28, 2019, in anticipation of the closing of the Merger, Moody’s downgraded the long-term credit ratings of CenterPoint Energy, including its issuer rating to Baa2 from Baa1, senior unsecured debt rating to Baa2 from Baa1, subordinated debt rating to Baa3 from Baa2 and preferred stock rating to Ba1 from Baa3 while affirming its Prime‐2 short-term rating for commercial paper and A1 senior secured revenue bonds. Moody’s also changed the rating outlook for CenterPoint Energy to stable from negative. On February 1, 2019, as a result of the closing of the Merger, S&P lowered its issuer credit rating on CenterPoint Energy to BBB+ from A-, and lowered the credit ratings for CenterPoint Energy’s senior unsecured and subordinated notes to BBB from BBB+ and the Series A Preferred Stock to BBB- from BBB. S&P also removed the CenterPoint Energy ratings from CreditWatch, where S&P had previously placed them with negative implications as a result of the announcement of the Merger in the second quarter of 2018 and changed its outlook to stable. S&P also lowered its issuer credit ratings on Houston Electric and CERC to BBB+ from A-. S&P affirmed the A credit rating on Houston Electric’s first mortgage bonds and general mortgage bonds and lowered the credit rating on CERC’s senior unsecured debt to BBB+ from A-. S&P also removed the Houston Electric and CERC ratings from CreditWatch, where S&P had previously placed them with negative implications as a result of the announcement of the Merger in the second quarter of 2018 and changed its outlook to stable. S&P also affirmed the A-2 short-term and commercial paper ratings for CenterPoint Energy and CERC. The Registrants note that these credit ratings are not recommendations to buy, sell or hold their securities. Each rating should be evaluated independently of any other rating. Any future reduction or withdrawal of one or more of the Registrants’ credit ratings could have a material adverse impact on their ability to access capital on acceptable terms.

An impairment of goodwill, long-lived assets, including intangible assets, equity method investments and an impairment or fair value adjustment to CenterPoint Energy’s Enable Series A Preferred Unit investment could reduce our earnings.

Goodwill is recorded when the purchase price of a business exceeds the fair market value of the tangible and separately measurable intangible net assets. Accounting principles generally accepted in the United States of America require CenterPoint Energy to test goodwill for impairment on an annual basis or when events or circumstances occur indicating that goodwill might be impaired. Long-lived assets, including intangible assets with finite useful lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable.

For investments CenterPoint Energy accounts for under the equity method, the impairment test considers whether the fair value of such investment as a whole, not the underlying net assets, has declined and whether that decline is other than temporary. For example, if Enable’s common unit price, distributions or earnings were to decline, and that decline is deemed to be other than temporary, CenterPoint Energy could determine that it is unable to recover the carrying value of its equity investment in Enable. Considerable judgment is used in determining if an impairment loss is other than temporary and the amount of any impairment. A sustained low Enable common unit price could result in CenterPoint Energy recording impairment charges in the future.

For investments CenterPoint Energy accounts for as investments without a readily determinable fair value, such as the Enable Series A Preferred Unit investment, the carrying value of the asset may be adjusted to fair value, resulting in a gain or loss in the

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period, if a transaction on an identical or similar investment in Enable is observed. Additionally, CenterPoint Energy considers qualitative impairment triggers, such as significant deterioration in earnings performance, significant decline in market condition and other factors that raise significant concerns about Enable’s ability to continue as a going concern, to determine if an impairment analysis should be performed on its investment.

Further, as a result of the Merger, CenterPoint Energy will have a significant amount of goodwill and other intangible assets on its consolidated financial statements that are subject to impairment based on future adverse changes to its business or prospects.

Should the annual impairment test or another periodic impairment test or an observable transaction, as described above, indicate the fair value of our assets is less than the carrying value, we would be required to take a non-cash charge to earnings with a correlative effect on equity and balance sheet leverage as measured by debt to total capitalization. A non-cash impairment charge or fair value adjustment could materially adversely impact our results of operations and financial condition.

Changing demographics, poor investment performance of pension plan assets and other factors adversely affecting the calculation of pension liabilities could unfavorably impact our results of operations, liquidity and financial position.

CenterPoint Energy and its subsidiaries maintain qualified defined benefit pension plans covering certain of its employees. Costs associated with these plans are dependent upon a number of factors including the investment returns on plan assets, the level of interest rates used to calculate the funded status of the plan, contributions to the plan, and government regulations with respect to funding requirements and the calculation of plan liabilities. Funding requirements may increase and CenterPoint Energy may be required to make unplanned contributions in the event of a decline in the market value of plan assets, a decline in the interest rates used to calculate the present value of future plan obligations, or government regulations that increase minimum funding requirements or the pension liability. In addition to affecting CenterPoint Energy’s funding requirements, each of these factors could adversely affect our results of operations, liquidity and financial position.

Vectren also contributes to several multi-employer pension plans for Infrastructure Services. If Infrastructure Services withdraws from these plans, CenterPoint Energy may be required to pay an amount based on the allocable share of the plans’ unfunded vested benefits, referred to as the withdrawal liability. This could adversely affect our results of operations, liquidity and financial position.

The costs of providing health care benefits to our employees and retirees may increase substantially and adversely affect our results of operations and financial condition.

We provide health care benefits to eligible employees and retirees through self-insured plans. In recent years, the costs of providing these benefits per beneficiary increased due to higher health care costs and higher levels of large individual health care claims and overall health care claims. We anticipate that such costs will continue to rise. Further, the effects of health care reform or any future legislative changes could also materially affect our health care benefit programs and costs. Any potential changes and resulting cost impacts, which are likely to be passed on to us, cannot be determined with certainty at this time. Our costs of providing these benefits could also increase materially in the future should there be a material reduction in the amount of the recovery of these costs through our rates or should significant delays develop in the timing of the recovery of such costs, which could adversely affect our results of operations and liquidity.

The use of derivative contracts in the normal course of business by the Registrants or Enable could result in financial losses that could negatively impact the Registrants’ results of operations and those of Enable.

The Registrants use derivative instruments, such as swaps, options, futures and forwards, to manage commodity, weather and financial market risks. Enable may also use such instruments from time to time to manage its commodity and financial market risks. The Registrants or Enable could recognize financial losses as a result of volatility in the market values or ineffectiveness of these contracts or should a counterparty fail to perform. Additionally, in the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management’s judgment or use of estimates. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.

If CenterPoint Energy redeems the ZENS prior to their maturity in 2029, its ultimate tax liability and redemption payments would result in significant cash payments, which would adversely impact its cash flows. Similarly, a significant amount of exchanges of ZENS by ZENS holders could adversely impact CenterPoint Energy’s cash flows.

CenterPoint Energy has approximately $828 million principal amount of ZENS outstanding as of December 31, 2018. CenterPoint Energy owns shares of ZENS-Related Securities equal to approximately 100% of the reference shares used to calculate

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its obligation to the holders of the ZENS. CenterPoint Energy may redeem all of the ZENS at any time at a redemption amount per ZENS equal to the higher of the contingent principal amount per ZENS ($93 million in the aggregate, or $6.57 per ZENS, as of December 31, 2018) or the sum of the current market value of the reference shares attributable to one ZENS at the time of redemption. In the event CenterPoint Energy redeems the ZENS, in addition to the redemption amount, it would be required to pay deferred taxes related to the ZENS. CenterPoint Energy’s ultimate tax liability related to the ZENS continues to increase by the amount of the tax benefit realized each year. If the ZENS had been redeemed on December 31, 2018, deferred taxes of approximately $438 million would have been payable in 2018, based on 2018 tax rates in effect. In addition, if all the shares of ZENS-Related Securities had been sold on December 31, 2018 to fund the aggregate redemption amount, capital gains taxes of approximately $90 million would have been payable in 2018. Similarly, a significant amount of exchanges of ZENS by ZENS holders could adversely impact CenterPoint Energy’s cash flows. This could happen if CenterPoint Energy’s creditworthiness were to drop or the market for the ZENS were to become illiquid, or for some other reason. While funds for the payment of cash upon exchange of ZENS could be obtained from the sale of the shares of ZENS-Related Securities that CenterPoint Energy owns or from other sources, ZENS exchanges result in a cash outflow because tax deferrals related to the ZENS and ZENS-Related Securities shares would typically cease when ZENS are exchanged and ZENS-Related Securities shares are sold.

Dividend requirements associated with the Series A Preferred Stock and the Series B Preferred Stock that CenterPoint Energy issued to fund a portion of the Merger subject it to certain risks.

In August 2018, CenterPoint Energy issued 800,000 shares of Series A Preferred Stock. In October 2018, CenterPoint Energy issued 19,550,000 depositary shares, each representing a 1/20th interest in a share of CenterPoint Energy’s Series B Preferred Stock. Any future payments of cash dividends, and the amount of any cash dividends CenterPoint Energy pays, on the Series A Preferred Stock and the Series B Preferred Stock will depend on, among other things, its financial condition, capital requirements and results of operations and the ability of our subsidiaries and Enable to distribute cash to CenterPoint Energy, as well as other factors that CenterPoint Energy’s Board of Directors (or an authorized committee thereof) may consider relevant. Any failure to pay scheduled dividends on the Series A Preferred Stock and the Series B Preferred Stock when due would likely have a material adverse impact on the market price of the Series A Preferred Stock, the Series B Preferred Stock, Common Stock and CenterPoint Energy’s debt securities and would prohibit CenterPoint Energy, under the terms of the Series A Preferred Stock and Series B Preferred Stock, from paying cash dividends on or repurchasing shares of Common Stock (subject to limited exceptions) until such time as CenterPoint Energy has paid all accumulated and unpaid dividends on the Series A Preferred Stock and the Series B Preferred Stock.

The terms of the Series A Preferred Stock and the Series B Preferred Stock further provide that if dividends on any of the respective shares have not been declared and paid for the equivalent of three or more semi-annual or six or more quarterly dividend periods, whether or not for consecutive dividend periods, the holders of such shares, voting together as a single class with holders of any and all other series of CenterPoint Energy’s capital stock on parity with its Series A Preferred Stock or its Series B Preferred Stock (as to the payment of dividends and amounts payable on liquidation, dissolution or winding up of CenterPoint Energy’s affairs) upon which like voting rights have been conferred and are exercisable, will be entitled to vote for the election of a total of two additional members of CenterPoint Energy’s Board of Directors, subject to certain terms and limitations.

Risk Factors Affecting Electric Generation, Transmission and Distribution Businesses (CenterPoint Energy and Houston Electric)

Rate regulation of Houston Electric’s and Indiana Electric’s businesses may delay or deny their ability to earn an expected return and fully recover their costs.

Houston Electric’s rates are regulated by certain municipalities and the PUCT and Indiana Electric’s rates are regulated by the IURC. Their rates are set in comprehensive base rate proceedings (i.e., general rate cases) based on an analysis of their invested capital, their expenses and other factors in a designated test year. Each of these rate proceedings is subject to third-party intervention and appeal, and the timing of a general base rate proceeding may be out of Houston Electric’s and Indiana Electric’s control. For Houston Electric, a general base rate proceeding is required 48 months from the date of the last general base rate change, unless the PUCT issues an order extending the deadline to file that general base rate proceeding. In connection with the PUCT’s review of the impacts of the TCJA, on February 13, 2018, Houston Electric and other likely parties to a future rate case announced a settlement that, among other things, requires Houston Electric to make a general rate case filing by April 30, 2019. There is no guarantee that current rates will continue or that the general rate case will result in rates that fully recover Houston Electric’s costs or enable it to earn a reasonable return on its invested capital.

The rates that Houston Electric and Indiana Electric are allowed to charge may not match their costs at any given time, a situation referred to as “regulatory lag.” For Houston Electric and Indiana Electric, though several interim rate adjustment mechanisms have been implemented to reduce the effects of regulatory lag, these adjustment mechanisms are subject to the

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applicable regulatory body’s approval and are subject to limitations that may reduce Houston Electric’s and Indiana Electric’s ability to adjust rates. For example, for Houston Electric, the DCRF mechanism adjusts an electric utility’s rates for increases in net distribution-invested capital (e.g., distribution plant and distribution-related intangible plant and communication equipment) since its last comprehensive base rate proceeding, but Houston Electric may only make a DCRF filing once per calendar year and not during a comprehensive base rate proceeding. The TCOS mechanism allows a transmission service provider to update its wholesale transmission rates to reflect changes in transmission-related invested capital, but is only available to Houston Electric twice per calendar year. However, neither of these mechanisms provides for recovery of operations and maintenance expenses.

Similarly, for Indiana Electric, the TDSIC rate mechanism allows electric utilities (that have an IURC-approved seven-year infrastructure improvement plan) to request incremental rate increases every six months to pay for the projects included in that plan, subject to IURC approval. However, the TDSIC allows the utility to recover 80% of the cost as they are incurred, with the remaining costs to be deferred as regulatory assets until the next base rate case, and rate increases are limited to no more than 2% of the utility’s total retail revenues from the prior year. Indiana Electric recovers transmission costs through a FERC-approved formula rate and reflects charges and costs associated with participation in MISO through the Reliability Cost and Revenue Adjustment and MISO Cost and Recovery Adjustment mechanisms, which are filed annually. With respect to the DSMA, electricity suppliers are required to submit energy efficiency plans to the IURC at least once every three years and may file under the DSMA mechanism annually to recover program and administrative costs, including lost revenues and financial incentives. The DSMA is subject to IURC approval.

Houston Electric and Indiana Electric can make no assurance that filings for such mechanisms will result in favorable adjustments to rates or in full cost recovery. Notwithstanding the application of the rate mechanisms discussed above, the regulatory process by which rates are determined is subject to change as a result of the legislative process or rulemaking, as the case may be, and may not always be available or result in rates that will produce recovery of Houston Electric’s and Indiana Electric’s costs or enable them to earn an expected return. In addition, changes to the interim adjustment mechanisms could result in an increase in regulatory lag or otherwise impact Houston Electric’s and Indiana Electric’s ability to recover their costs in a timely manner. Additionally, inherent in the regulatory process is some level of risk that jurisdictional regulatory authorities may initiate investigations of the prudence of operating expenses incurred or capital investments made by Houston Electric or Indiana Electric and deny the full recovery of their cost of service in rates. To the extent the regulatory process does not allow Houston Electric and Indiana Electric to make a full and timely recovery of appropriate costs, their results of operations, financial condition and cash flows could be adversely affected.

Unlike Houston Electric, Indiana Electric must seek approval by the IURC for long-term financing authority. This authority allows Indiana Electric the flexibility to issue debt securities,among other financing arrangements. In the event that the IURC does not approve Indiana Electric’s financing authority, Indiana Electric may not be able to fully execute its financing plans and its financial condition, results of operations and cash flows could be adversely affected.

Disruptions at power generation facilities owned by third parties could interrupt Houston Electric’s sales of transmission and distribution services.

Houston Electric transmits and distributes to customers of REPs electric power that the REPs obtain from power generation facilities owned by third parties. Houston Electric does not own or operate any power generation facilities. If power generation is disrupted or if power generation capacity is inadequate, Houston Electric’s sales of transmission and distribution services may be diminished or interrupted, and its results of operations, financial condition and cash flows could be adversely affected.

Houston Electric’s and Indiana Electric’s revenues and results of operations are seasonal.

A significant portion of Houston Electric’s revenues is derived from rates that it collects from each REP based on the amount of electricity it delivers on behalf of such REP. Similarly, Indiana Electric’s revenues are derived from rates it charges its customers to provide electricity. Thus, Houston Electric’s and Indiana Electric’s revenues and results of operations are subject to seasonality, weather conditions and other changes in electricity usage. Houston Electric’s revenues are generally higher during the warmer months. Unusually mild weather in the warmer months could diminish Houston Electric’s results of operations and harm its financial condition. Conversely, extreme warm weather conditions could increase Houston Electric’s results of operations in a manner that would not likely be annually recurring.

A significant portion of Indiana Electric’s sales are for space heating and cooling. Consequently, Indiana Electric’s results of operations may be adversely affected by warmer-than-normal heating season weather or colder-than-normal cooling season weather, while more extreme seasonal weather conditions could increase Indiana Electric’s results of operations in a manner that would not likely be annually recurring.

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Houston Electric and Indiana Electric, as a member of ERCOT and MISO, respectively, could be subject to higher costs for improvements, as well as fines or other sanctions as a result of mandatory reliability standards.

Houston Electric and Indiana Electric are members of ERCOT and MISO, respectively, which serve the electric transmission needs of their applicable regions. As a result of their respective participation in ERCOT and MISO, Houston Electric and Indiana Electric do not have operational control over their transmission facilities and are subject to certain costs for improvements to these regional electric transmission systems. In addition, the FERC has jurisdiction with respect to ensuring the reliability of electric transmission service, including transmission facilities owned by Houston Electric and other utilities within ERCOT and Indiana Electric and other utilities within MISO, respectively. The FERC has designated the NERC as the ERO to promulgate standards, under FERC oversight, for all owners, operators and users of the bulk power system. The FERC has approved the delegation by the NERC of authority for reliability in ERCOT to the Texas RE, a Texas non-profit corporation and for reliability in the portion of MISO that includes Indiana Electric to ReliabilityFirst Corporation, a Delaware non-profit corporation. Compliance with mandatory reliability standards may subject Houston Electric and Indiana Electric to higher operating costs and may result in increased capital expenditures. In addition, if Houston Electric or Indiana Electric were to be found to be in noncompliance with applicable mandatory reliability standards, they could be subject to sanctions, including substantial monetary penalties.

Houston Electric’s receivables are primarily concentrated in a small number of REPs, and any delay or default in such payments could adversely affect Houston Electric’s cash flows, financial condition and results of operations.

Houston Electric’s receivables from the distribution of electricity are collected from REPs that supply the electricity Houston Electric distributes to their customers. As of December 31, 2018, Houston Electric did business with approximately 65 REPs. Adverse economic conditions, structural problems in the market served by ERCOT or financial difficulties of one or more REPs could impair the ability of these REPs to pay for Houston Electric’s services or could cause them to delay such payments. Houston Electric depends on these REPs to remit payments on a timely basis. Applicable regulatory provisions require that customers be shifted to another REP or a provider of last resort if a REP cannot make timely payments. Applicable PUCT regulations significantly limit the extent to which Houston Electric can apply normal commercial terms or otherwise seek credit protection from firms desiring to provide retail electric service in its service territory, and Houston Electric thus remains at risk for payments related to services provided prior to the shift to another REP or the provider of last resort. A significant portion of Houston Electric’s billed receivables from REPs are from affiliates of NRG and Vistra Energy Corp., formerly known as TCEH Corp. Houston Electric’s aggregate billed receivables balance from REPs as of December 31, 2018 was $207 million. Approximately 34% and 12% of this amount was owed by affiliates of NRG and Vistra Energy Corp., respectively. Any delay or default in payment by REPs could adversely affect Houston Electric’s cash flows, financial condition and results of operations. If a REP were unable to meet its obligations, it could consider, among various options, restructuring under the bankruptcy laws, in which event such REP might seek to avoid honoring its obligations, and claims might be made by creditors involving payments Houston Electric had received from such REP.

The AMS deployed throughout Houston Electric’s and Indiana Electric’s service territories may experience unexpected problems with respect to the timely receipt of accurate metering data.

Houston Electric and Indiana Electric have deployed an AMS throughout their service territories, which integrates equipment and computer software from various vendors to eliminate the need for physical meter readings to be taken at consumers’ premises, such as monthly readings for billing purposes and special readings for Houston Electric associated with a customer’s change in REPs or the connection or disconnection of electric service. Unanticipated difficulties could be encountered during the operation of the AMS, including failures or inadequacy of equipment or software, difficulties in integrating the various components of the AMS, changes in technology, cyber-security issues, loss of data and factors outside the control of Houston Electric and Indiana Electric, which could result in delayed or inaccurate metering data that might lead to delays or inaccuracies in the calculation and imposition of delivery or other charges, which could have a material adverse effect on Houston Electric’s or Indiana Electric’s results of operations, financial condition and cash flows.

Indiana Electric’s execution of its electric generation transition plan and its regulated power supply operations are subject to various risks, including timely recovery of capital investments, increased costs and facility outages or shutdowns.

As required by Indiana regulation, Indiana Electric filed its 2016 IRP with the IURC in December 2016. Indiana requires each electric utility to perform and submit an IRP that uses economic modeling to consider the costs and risks associated with available resource options to provide reliable electric service for the next 20-year period. While the IURC does not approve or reject the IRP, the process involves the issuance of a staff report that provides comments on the IRP, which was issued in November 2017. Indiana Electric has taken the comments provided in the report into consideration in its generation resource plans.

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Consistent with the recommendations presented in Indiana Electric’s IRP and as a direct result of significant environmental investments required to comply with current regulations, Indiana Electric plans to retire a significant portion of its current generating fleet by the end of 2023. Indiana Electric’s electric generation transition plan will require recovery of new capital investments, as well as costs of retiring the current generation fleet, including decommissioning costs, costs of removal and any remaining unrecovered costs of retired assets. Currently, Indiana Electric relies on coal for substantially all of its generation capacity. In February 2018, Indiana Electric filed a petition seeking authorization from the IURC to construct a new 800-900 MW natural gas combined cycle generating facility to replace this capacity at an approximate cost of $900 million, which includes the cost of a new natural gas pipeline to serve the plant. Indiana Electric is requesting a certificate of public convenience and necessity authorizing construction timelines and costs of new generation resources, as well as necessary unit retrofits, to implement the generation transition plan. Also, Indiana Electric is seeking approval to defer some capital costs associated with the generation plan until its next base rate proceeding and may use rate recovery mechanisms to recover other portions of the cost. Indiana Electric expects an order from the IURC in the certificate of public convenience and necessity proceeding in the first half of 2019. Given the significance of the plan, there is inherent risk associated with the construction of new generation, including the ability to procure resources needed to build at a reasonable cost, scarcity of resources and labor, ability to appropriately estimate costs of new generation, the effects of potential construction delays and cost overruns and the ability to meet capacity requirements.

Additionally, Indiana Electric’s generating facilities are subject to operational risks that could result in unscheduled plant outages, unanticipated operation and maintenance expenses and increased purchase power costs. These operational risks can arise from circumstances such as facility shutdowns due to equipment failure or operator error; interruption of fuel supply or increased prices of fuel as contracts expire; disruptions in the delivery of electricity; inability to comply with regulatory or permit requirements; labor disputes; or natural disasters. Further, Indiana Electric’s coal supply is purchased largely from a single, unrelated party and, although the coal supply is under long-term contract, the loss of this supplier or transportation interruptions could adversely affect Indiana Electric’s results of operations, financial condition and cash flows.

Risk Factors Affecting Natural Gas Distribution and Competitive Energy Services Businesses (CenterPoint Energy and CERC)

Rate regulation of NGD may delay or deny its ability to earn an expected return and fully recover its costs.

NGD’s rates are regulated by certain municipalities (in Texas only) and state commissions based on an analysis of NGD’s invested capital, expenses and other factors in a test year (often either fully or partially historic) in comprehensive base rate proceedings, subject to periodic review and adjustment. Each of these proceedings is subject to third-party intervention and appeal, and the timing of a general base rate proceeding may be out of NGD’s control. Thus, the rates that NGD is allowed to charge may not match its costs at any given time, resulting in what is referred to as “regulatory lag.”

Though several interim rate adjustment mechanisms have been approved by jurisdictional regulatory authorities and implemented by NGD to reduce the effects of regulatory lag, such adjustment mechanisms are subject to the applicable regulatory body’s approval and are subject to certain limitations that may reduce NGD’s ability to adjust its rates.

Arkansas allows public utilities to elect to have their rates regulated pursuant to a FRP, providing for a utility’s base rates to be adjusted once a year. In each of Louisiana, Mississippi and Oklahoma, NGD makes annual filings utilizing various formula rate mechanisms that adjust rates based on a comparison of authorized return to actual return to achieve the allowed return rates in those jurisdictions. Additionally, in Minnesota, the MPUC implemented a full revenue decoupling program, which separates approved revenues from the amount of natural gas used by its customers. Further, in Indiana, NGD may file a CSIA every six months to seek rate increases to recover certain federally mandated project costs (e.g., pipeline safety). The TDSIC (recovered through the CSIA), allows the utility to recover 80% of its project costs associated with an IURC-approved seven-year infrastructure improvement plan as they are incurred, with the remaining costs to be deferred until the next base rate case, and rate increases are limited to no more than 2% of the utility’s total retail revenues. In Ohio, the DRR is an annual mechanism that allows a utility to recover its investments in utility plant and operating expenses associated with replacing bare steel and cast-iron pipelines, as well as certain other infrastructure investments. The effectiveness of these filings and programs depends on the approval of the applicable state regulatory body.

In Texas, NGD’s Houston, South Texas, Beaumont/East Texas and Texas Coast divisions each submit annual GRIP filings to recover the incremental capital investments made in the preceding year. NGD must file a general rate case no later than five years after the initial GRIP implementation date.

NGD can make no assurance that filings for such mechanisms will result in favorable adjustments to rates. Notwithstanding the application of the rate mechanisms discussed above, the regulatory process by which rates are determined is subject to change as a result of the legislative process or rulemaking, as the case may be, and may not always be available or result in rates that will

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produce recovery of NGD’s costs or enable NGD to earn an expected return. In addition, changes to the interim adjustment mechanisms could result in an increase in regulatory lag or otherwise impact NGD’s ability to recover its costs in a timely manner. Additionally, inherent in the regulatory process is some level of risk that jurisdictional regulatory authorities may initiate investigations of the prudence of operating expenses incurred or capital investments made by NGD and deny the full recovery of NGD’s cost of service or the full recovery of incurred natural gas costs in rates. To the extent the regulatory process does not allow NGD to make a full and timely recovery of appropriate costs, its results of operations, financial condition and cash flows could be adversely affected.

Unlike CERC, Indiana Gas, SIGECO’s natural gas distribution business and VEDO must seek approval by the IURC and PUCO, as applicable, for long-term financing authority. This authority allows these utilities the flexibility to issue their debt securities, among other financing arrangements. In the event that the IURC or PUCO do not approve these utilities’ respective financing authorities, they may not be able to fully execute their financing plans and their respective financial conditions, results of operations and cash flows could be adversely affected.

Access to natural gas supplies and pipeline transmission and storage capacity are essential components of reliable service for NGD’s customers.

NGD depends on third-party service providers to maintain an adequate supply of natural gas and for available storage and intrastate and interstate pipeline capacity to satisfy its customers’ needs, all of which are critical to system reliability. Substantially all of NGD’s natural gas supply is purchased from intrastate and interstate pipelines. If NGD is unable to secure an independent natural gas supply of its own or through its affiliates or if third-party service providers fail to timely deliver natural gas to meet NGD’s requirements, the resulting decrease in natural gas supply in NGD’s service territories could have a material adverse effect on its results of operations, cash flows and financial condition. Additionally, a significant disruption, whether through reduced intrastate and interstate pipeline transmission or storage capacity or other events affecting natural gas supply, including, but not limited to, operational failures, hurricanes, tornadoes, floods, acts of terrorism or cyber-attacks or changes in legislative or regulatory requirements, could also adversely affect NGD’s businesses. Further, to the extent that NGD’s natural gas requirements cannot be met through access to or continued use of existing natural gas infrastructure or if additional infrastructure, including onshore and offshore exploration and production facilities, gathering and processing systems and pipeline and storage capacity is not constructed at a rate that satisfies demand, then NGD’s operations could be negatively affected.

NGD and CES, including transportation and storage, whether through the use of AMAs or other arrangements, are subject to fluctuations in notional natural gas prices as well as geographic and seasonal natural gas price differentials, which could affect the ability of their suppliers and customers to meet their obligations or otherwise adversely affect their liquidity, results of operations and financial condition.

NGD and CES are subject to risk associated with changes in the notional price of natural gas as well as geographic and seasonal natural gas price differentials that impact our business, including transportation and storage, whether through the use of AMAs or other arrangements. Increases in natural gas prices might affect NGD’s and CES’s ability to collect balances due from their customers and, for NGD, could create the potential for uncollectible accounts expense to exceed the recoverable levels built into tariff rates. In addition, a sustained period of high natural gas prices could (i) decrease demand for natural gas in the areas in which NGD and CES operate, thereby resulting in decreased sales and revenues and (ii) increase the risk that NGD’s and CES’s suppliers or customers fail or are unable to meet their obligations. An increase in natural gas prices would also increase working capital requirements by increasing the investment that must be made to maintain natural gas inventory levels. Additionally, a decrease in natural gas prices could increase the amount of collateral required under hedging arrangements. AMAs may be subject to regulatory approval, and such agreements may not be renewed or may be renewed with less favorable terms.

A decline in CERC’s credit rating could result in CERC having to provide collateral under its shipping or hedging arrangements or to purchase natural gas, which consequently would increase its cash requirements and adversely affect its financial condition.

If CERC’s credit rating were to decline, it might be required to post cash collateral under its shipping or hedging arrangements or to purchase natural gas. If a credit rating downgrade and the resultant cash collateral requirement were to occur at a time when CERC was experiencing significant working capital requirements or otherwise lacked liquidity, CERC’s results of operations, financial condition and cash flows could be adversely affected.

NGD’s and CES’s revenues and results of operations are seasonal.

NGD’s and CES’s revenues are primarily derived from natural gas sales. Thus, their revenues and results of operations are subject to seasonality, weather conditions and other changes in natural gas usage, with revenues being higher during the winter

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months. Unusually mild weather in the winter months could diminish our results of operations and harm our financial condition. Conversely, extreme cold weather conditions could increase our results of operations in a manner that would not likely be annually recurring.

The states in which NGD provides regulated local natural gas distribution may, either through legislation or rules, adopt restrictions regarding organization, financing and affiliate transactions that could have significant adverse impacts on NGD’s ability to operate.

From time to time, proposals have been put forth in some of the states in which NGD does business to give state regulatory authorities increased jurisdiction and scrutiny over organization, capital structure, intracompany relationships and lines of business that could be pursued by registered holding companies and their affiliates that operate in those states. Some of these frameworks attempt to regulate financing activities, acquisitions and divestitures, and arrangements between the utilities and their affiliates, and to restrict the level of non-utility business that can be conducted within the holding company structure. Additionally, they may impose record-keeping, record access, employee training and reporting requirements related to affiliate transactions and reporting in the event of certain downgrading of the utility’s credit rating.

These regulatory frameworks could have adverse effects on NGD’s ability to conduct its utility operations, to finance its business and to provide cost-effective utility service. In addition, if more than one state adopts restrictions on similar activities, it may be difficult for NGD and us to comply with competing regulatory requirements.

NGD and CES must compete with alternate energy sources, which could result in less natural gas marketed and have an adverse impact on our results of operations, financial condition and cash flows.

NGD and CES compete primarily with alternate energy sources such as electricity and other fuel sources. In some areas, intrastate pipelines, other natural gas distributors and marketers also compete directly with NGD and CES for natural gas sales to end users. In addition, as a result of federal regulatory changes affecting interstate pipelines, natural gas marketers operating on these pipelines may be able to bypass NGD’s facilities and market, sell and/or transport natural gas directly to commercial and industrial customers. Any reduction in the amount of natural gas marketed, sold or transported by NGD and CES as a result of competition may have an adverse impact on our results of operations, financial condition and cash flows.

Infrastructure Services’ and ESG’s operations could be adversely affected by a number of factors.

Infrastructure Services’ and ESG’s business results are dependent on a number of factors. The industries are competitive and many of the contracts are subject to a bidding process. Should Infrastructure Services and ESG be unsuccessful in bidding contracts (e.g., federal Indefinite Delivery/Indefinite Quantity contracts for ESG), results of operations could be impacted. Through competitive bidding, the volume of contracted work could vary significantly from year to year. Further, to the extent there are unanticipated cost increases in completion of the contracted work or issues arise where amounts due for work performed may not be collected, the profit margin realized on any single project could be reduced. Changes in legislation and regulations impacting the sectors in which the customers served by Infrastructure Services or ESG operate could adversely impact operating results.

Infrastructure Services enters into a variety of contracts, some of which are fixed price. Other risks that could adversely affect Infrastructure Services include, but are not limited to: failure to properly construct pipeline infrastructure; loss of significant customers or a significant decline in related customer revenues; cancellation of projects by customers and/or reductions in the scope of the projects; changes in the timing of projects; the inability to obtain materials and equipment required to perform services from suppliers and manufacturers; and changes in the market prices of oil and natural gas and state regulatory requirements that mandate pipeline replacement programs that would affect the demand for infrastructure construction and/or the project margin realized on projects. For ESG, other risks include, but are not limited to: discontinuation of the federal ESPC and UESC programs; the inability of customers to finance projects; risks associated with projects owned or operated; failure to appropriately design, construct or operate projects; and cancellation of projects by customers and/or reductions in the scope of the projects.

In addition, Vectren’s non-utility businesses have supported its utilities pursuant to service contracts by providing infrastructure services. In most instances, Vectren’s ability to maintain these service contracts depends upon regulatory discretion, and there can be no assurance it will be able to obtain future service contracts, or that existing arrangements will not be revisited.

ESG’s business has performance and warranty obligations, some of which are guaranteed by Vectren.

In the normal course of business, ESG issues performance bonds and other forms of assurance that commit it to operate facilities, pay vendors or subcontractors and support warranty obligations. Vectren, as the parent company, will from time to time guarantee its subsidiaries’ commitments. These guaranties do not represent incremental consolidated obligations; rather, they

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represent parental guaranties of subsidiary obligations to allow the subsidiary the flexibility to conduct business without posting other forms of collateral. Vectren has not been called upon to satisfy any obligations pursuant to these parental guaranties. As a result of the closing of the Merger, these guaranties would ultimately become obligations of CenterPoint Energy or its subsidiaries.

Risk Factors Affecting CenterPoint Energy’s Interests in Enable Midstream Partners, LP (CenterPoint Energy)

CenterPoint Energy holds a substantial limited partner interest in Enable (54.0% of the outstanding common units representing limited partner interests in Enable as of December 31, 2018), as well as 50% of the management rights in Enable GP and a 40% interest in the incentive distribution rights held by Enable GP. As of December 31, 2018, CenterPoint Energy owned an aggregate of 14,520,000 Enable Series A Preferred Units representing limited partner interests in Enable. Accordingly, CenterPoint Energy’s future earnings, results of operations, cash flows and financial condition will be affected by the performance of Enable, the amount of cash distributions it receives from Enable and the value of its interests in Enable. Factors that may have a material impact on Enable’s performance and cash distributions, and, hence, the value of CenterPoint Energy’s interests in Enable, include the risk factors outlined below, as well as the risks described elsewhere under “Risk Factors” that are applicable to Enable.

CenterPoint Energy’s cash flows will be adversely impacted if it receives less cash distributions from Enable than it currently expects or if it reduces its ownership in Enable.

Both CenterPoint Energy and OGE hold their limited partner interests in Enable in the form of common units. CenterPoint Energy also holds Enable Series A Preferred Units. For the Enable Series A Preferred Units, Enable is expected to pay $0.625 per Enable Series A Preferred Unit, or $2.50 per Enable Series A Preferred Unit on an annualized basis. However, distributions on each Enable Series A Preferred Unit are not mandatory and are non-cumulative in the event distributions are not declared on the Enable Series A Preferred Units. Enable is expected to pay a minimum quarterly distribution of $0.2875 per unit, or $1.15 per unit on an annualized basis, on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates (referred to as “available cash”). Enable may not have sufficient available cash each quarter to enable it (i) to pay distributions on the Enable Series A Preferred Units or (ii) maintain or increase the distributions on its common units. Additionally, distributions on the Enable Series A Preferred Units reduce the amount of available cash Enable has to pay distributions on its common units. The amount of cash Enable can distribute on its common units and the Enable Series A Preferred Units will principally depend upon the amount of cash it generates from its operations, which will fluctuate from quarter to quarter based on, among other things:

• the fees and gross margins it realizes with respect to the volume of natural gas, NGLs and crude oil that it handles;

• the prices of, levels of production of, and demand for natural gas, NGLs and crude oil;

• the volume of natural gas, NGLs and crude oil it gathers, compresses, treats, dehydrates, processes, fractionates, transports and stores;

• the relationship among prices for natural gas, NGLs and crude oil;

• cash calls and settlements of hedging positions;

• margin requirements on open price risk management assets and liabilities;

• the level of competition from other companies offering midstream services;

• adverse effects of governmental and environmental regulation;

• the level of its operation and maintenance expenses and general and administrative costs; and

• prevailing economic conditions.

In addition, the actual amount of cash Enable will have available for distribution will depend on other factors, including:

• the level and timing of its capital expenditures;

• the cost of acquisitions;

• its debt service requirements and other liabilities;

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• fluctuations in its working capital needs;

• its ability to borrow funds and access capital markets;

• restrictions contained in its debt agreements;

• the amount of cash reserves established by Enable GP;

• distributions paid on the Enable Series A Preferred Units;

• any impact on cash levels should any sale of CenterPoint Energy’s investment in Enable occur, as discussed further below; and

• other business risks affecting its cash levels.

Additionally, CenterPoint Energy may also reduce its ownership in Enable over time through sales in the public equity markets, or otherwise, of the Enable common units it holds, subject to market conditions. CenterPoint Energy’s ability to execute any sale of Enable common units is subject to a number of uncertainties, including the timing, pricing and terms of any such sale. Any sales of Enable common units CenterPoint Energy owns could have an adverse impact on the price of Enable common units or on any trading market for Enable common units. Further, CenterPoint Energy’s sales of Enable common units may have an adverse impact on Enable’s ability to issue equity on satisfactory terms, or at all, which may limit its ability to expand operations or make future acquisitions. Any reduction in CenterPoint Energy’s interest in Enable would result in decreased distributions from Enable and decrease income, which may adversely impact CenterPoint Energy’s ability to meet its payment obligations and pay dividends on its Common Stock. Further, any sales of Enable common units would result in a significant amount of taxes due. There can be no assurances that any sale of Enable common units in the public equity markets or otherwise will be completed. Any sale of Enable common units in the public equity markets or otherwise may involve significant costs and expenses, including, in connection with any public offering, a significant underwriting discount. CenterPoint Energy may not realize any or all of the anticipated strategic, financial, operational or other benefits from any completed sale or reduction in its investment in Enable. Furthermore, under certain circumstances, including following certain changes in the methodology employed by ratings agencies whereby the Enable Series A Preferred Units are no longer eligible for the same or a higher amount of “equity credit” attributed to the Enable Series A Preferred Units on their original issue date (referred to as a “rating event”), Enable has the option to redeem the Enable Series A Preferred Units. There can be no assurances that CenterPoint Energy will be able to reinvest any proceeds from such redemption in a manner that provides for a similar rate of return as the Enable Series A Preferred Units.

The amount of cash Enable has available for distribution to CenterPoint Energy on its common units and the Enable Series A Preferred Units depends primarily on its cash flow rather than on its profitability, which may prevent Enable from making distributions, even during periods in which Enable records net income.

The amount of cash Enable has available for distribution on its common units and the Enable Series A Preferred Units, depends primarily upon its cash flows and not solely on profitability, which will be affected by non-cash items. As a result, Enable may make cash distributions during periods when it records losses for financial accounting purposes and may not make cash distributions during periods when it records net earnings for financial accounting purposes.

Enable is required to, or may at its option, redeem the Enable Series A Preferred Units in certain circumstances, and Enable may not have sufficient funds to redeem the Enable Series A Preferred Units if required to do so.

As a holder of the Enable Series A Preferred Units, CenterPoint Energy may request that Enable list those units for trading on the NYSE. If Enable is unable to list the Enable Series A Preferred Units in certain circumstances, it will be required to redeem the Enable Series A Preferred Units. There can be no assurance that Enable would have sufficient financial resources available to satisfy its obligation to redeem the Enable Series A Preferred Units. In addition, mandatory redemption of the Enable Series A Preferred Units could have a material adverse effect on Enable’s business, financial position, results of operations and ability to make quarterly cash distributions to its unitholders.

Additionally, Enable may redeem the Enable Series A Preferred Units under certain circumstances, including following a rating event. Upon a rating event, the Enable Series A Preferred Units may be considered by Enable to be an expensive form of indebtedness. If Enable does not have sufficient funds to exercise its option to redeem the Enable Series A Preferred Units upon a rating event, then such inability could have a material adverse effect on Enable’s business, financial position, results of operations and ability to make quarterly cash distributions to its unitholders.

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CenterPoint Energy is not able to exercise control over Enable, which entails certain risks.

Enable is controlled jointly by CenterPoint Energy and OGE, who each own 50% of the management rights in Enable GP. The board of directors of Enable GP is composed of an equal number of directors appointed by OGE and by CenterPoint Energy, the president and chief executive officer of Enable GP and three directors who are independent as defined under the independence standards established by the NYSE. Accordingly, CenterPoint Energy is not able to exercise control over Enable.

Although CenterPoint Energy jointly controls Enable with OGE, CenterPoint Energy may have conflicts of interest with Enable that could subject it to claims that CenterPoint Energy has breached its fiduciary duty to Enable and its unitholders.

CenterPoint Energy and OGE each own 50% of the management rights in Enable GP, as well as limited partner interests in Enable, and interests in the incentive distribution rights held by Enable GP. CenterPoint Energy also holds Enable Series A Preferred Units. Conflicts of interest may arise between CenterPoint Energy and Enable and its unitholders. CenterPoint Energy’s joint control of Enable GP may increase the possibility of claims of breach of fiduciary or contractual duties including claims of conflicts of interest related to Enable. In resolving these conflicts, CenterPoint Energy may favor its own interests and the interests of its affiliates over the interests of Enable and its unitholders as long as the resolution does not conflict with Enable’s partnership agreement. These circumstances could subject CenterPoint Energy to claims that, in favoring its own interests and those of its affiliates, CenterPoint Energy breached a fiduciary or contractual duty to Enable or its unitholders.

Enable is subject to various operational risks, all of which could affect Enable’s ability to make cash distributions to CenterPoint Energy.

The execution of Enable’s businesses is subject to a number of operational risks, which include, but are not limited to, the following:

• Contract Renewal: Enable’s contracts are subject to renewal risks. To the extent Enable is unable to renew or replace its expiring contracts on terms that are favorable, if at all, or successfully manage its overall contract mix over time, its financial position, results of operations and ability to make cash distributions could be adversely affected;

• Customers: Enable depends on a small number of customers for a significant portion of its gathering and processing revenues and its transportation and storage revenues. The loss of, or reduction in volumes from, these customers or the failure to extend or replace these contracts or the extension or replacement of these contracts on less favorable terms, as a result of competition or otherwise, could result in a decline in sales of its gathering and processing or transportation and storage services and adversely affect Enable’s financial position, results of operations and ability to make cash distributions;

• Third-Party Drilling and Production Decisions: Enable’s businesses are dependent, in part, on the natural gas and crude oil drilling and production market conditions and decisions of others, over which Enable has no control. Further, sustained reductions in exploration or production activity in Enable’s areas of operation and fluctuations in energy prices could lead to further reductions in the utilization of Enable’s systems, which could adversely affect its financial position, results of operations and ability to make cash distributions. It may also become more difficult to maintain or increase the current volumes on Enable’s gathering systems and in its processing plants, as several of the formations in the unconventional resource plays in which it operates generally have higher initial production rates and steeper production decline curves than wells in more conventional basins. Should Enable determine that the economics of its gathering assets do not justify the capital expenditures needed to grow or maintain volumes associated therewith, Enable may reduce such capital expenditures, which could cause revenues associated with these assets to decline over time;

• Competition: Enable competes with similar enterprises, some of which include large energy companies with greater financial resources and access to natural gas, NGL and crude oil supplies, in its respective areas of operation, primarily through rates, terms of service and flexibility and reliability of service. Increased competitive pressure in Enable’s industry, which is already highly competitive, could adversely affect Enable’s financial position, results of operations and ability to make cash distributions;

• Cost Recovery of Capital Improvements: Enable may not be able to recover the costs of its substantial planned investment in capital improvements and additions, and the actual cost of such improvements and additions may be significantly higher than it anticipates. In Enable’s Form 10-K for the fiscal year ended December 31, 2018, Enable stated that it expects that its expansion capital could range from approximately $325 million to $425 million and its maintenance capital could range from approximately $105 million to $125 million for the year ending December 31, 2019;

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• Commodity Prices: Natural gas, NGL and crude oil prices are volatile, and changes in these prices could adversely affect Enable’s financial position, results of operations and ability to make cash distributions. Factors affecting prices are beyond Enable’s control and include the following: (i) demand for these commodities, which fluctuates with changes in market and economic conditions and other factors, including the impact of seasonality and weather, general economic conditions, the level of domestic and offshore natural gas production and consumption, (ii) the availability of imported natural gas, LNG, NGLs and crude oil, (iii) actions taken by foreign natural gas and oil producing nations, (iv) the availability of local, intrastate and interstate transportation systems, (v) the availability and marketing of competitive fuels, (vi) the impact of energy conservation efforts, technological advances affecting energy consumption and (vii) the extent of governmental regulation and taxation. Further, Enable’s natural gas processing arrangements expose it to commodity price fluctuations. In 2018, 6%, 27% and 67% of Enable’s processing plant inlet volumes consisted of keep-whole arrangements, percent-of-proceeds or percent-of-liquids and fee-based, respectively. If the price at which Enable sells natural gas or NGLs is less than the cost at which Enable purchases natural gas or NGLs under these arrangements, then Enable’s financial position, results of operations and ability to make cash distributions could be adversely affected;

• Credit Risk of Customers: Enable is exposed to credit risks of its customers, and any material nonpayment or nonperformance by its customers, whether through severe financial problems or otherwise, could adversely affect its financial position, results of operations and ability to make cash distributions;

• “Negotiated Rate” Contracts: Enable provides certain transportation and storage services under fixed-price “negotiated rate” contracts, which are authorized by the FERC, that are not subject to adjustment, even if its cost to perform these services exceeds the revenues received from these contracts. As of December 31, 2018, approximately 44% of Enable’s aggregate contracted firm transportation capacity on EGT and MRT and 45% of its aggregate contracted firm storage capacity on EGT and MRT, was subscribed under such “negotiated rate” contracts. As a result, Enable’s costs could exceed its revenues received under these contracts, and if Enable’s costs increase and it is not able to recover any shortfall of revenue associated with its negotiated rate contracts, the cash flow realized by its systems could decrease and, therefore, the cash Enable has available for distribution could also decrease;

• Unavailability of Interconnected Facilities: If third-party pipelines and other facilities interconnected to Enable’s gathering, processing or transportation facilities (including those providing transportation of natural gas and crude oil, transportation and fractionation of NGLs and electricity for compression, among others) become partially or fully unavailable for any reason, Enable’s financial position, results of operations and ability to make cash distributions could be adversely affected; and

• Land Ownership: Enable does not own all of the land on which its pipelines and facilities are located, and it is therefore subject to the possibility of more onerous terms and/or increased costs to retain necessary land use if it does not have valid rights-of-way or if such rights-of-way lapse or terminate, which could disrupt its operations or result in increased costs related to the construction and continuing operations elsewhere and adversely affect its financial position, results of operations and ability to make cash distributions.

Enable conducts a portion of its operations through joint ventures, which subject it to additional risks that could adversely affect the success of these operations and Enable’s financial position, results of operations and ability to make cash distributions.

Enable conducts a portion of its operations through joint ventures with third parties, including Enbridge Inc., DCP Midstream, LP, CVR Refining, LP, Trans Louisiana Gas Pipeline, Inc. and Pablo Gathering LLC. Enable may also enter into other joint venture arrangements in the future. These third parties may have obligations that are important to the success of the joint venture, such as the obligation to pay their share of capital and other costs of the joint venture.

Enable’s joint venture arrangements may involve risks not otherwise present when operating assets directly, including, for example:

• Enable shares certain approval rights over major decisions and may not be able to control decisions, including control of cash distributions to Enable from the joint venture;

• Enable may incur liabilities as a result of an action taken by its joint venture partners, including leaving Enable liable for the other joint venture partners’ shares of joint venture liabilities if those partners do not pay their share of the joint venture’s obligations;

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• Enable may be required to devote significant management time to the requirements of and matters relating to the joint ventures;

• Enable’s insurance policies may not fully cover loss or damage incurred by both Enable and its joint venture partners in certain circumstances;

• Enable’s joint venture partners may take actions contrary to its instructions or requests or contrary to its policies or objectives; and

• disputes between Enable and its joint venture partners may result in delays, litigation or operational impasses.

The risks described above or the failure to continue Enable’s joint ventures or to resolve disagreements with its joint venture partners could adversely affect its ability to transact the business that is the subject of such joint venture, which would in turn adversely affect Enable’s financial position, results of operations and ability to make cash distributions. The agreements under which Enable formed certain joint ventures may subject it to various risks, limit the actions it may take with respect to the assets subject to the joint venture and require Enable to grant rights to its joint venture partners that could limit its ability to benefit fully from future positive developments. Some joint ventures require Enable to make significant capital expenditures. If Enable does not timely meet its financial commitments or otherwise does not comply with its joint venture agreements, its rights to participate, exercise operator rights or otherwise influence or benefit from the joint venture may be adversely affected. Certain of Enable’s joint venture partners may have substantially greater financial resources than Enable has and Enable may not be able to secure the funding necessary to participate in operations its joint venture partners propose, thereby reducing its ability to benefit from the joint venture.

Under certain circumstances, Enbridge Inc. could have the right to purchase Enable’s ownership interest in SESH at fair market value.

Enable owns a 50% ownership interest in SESH. The remaining 50% ownership interest is held by Enbridge Inc. CenterPoint Energy owns 54.0% of Enable’s common units, 100% of the Enable Series A Preferred Units and a 40% economic interest in Enable GP. Pursuant to the terms of the limited liability company agreement of SESH, as amended, if, at any time, CenterPoint Energy has a right to receive less than 50% of Enable’s distributions through its interests in Enable and Enable GP, or do not have the ability to exercise certain control rights, Enbridge Inc. could have the right to purchase Enable’s interest in SESH at fair market value, subject to certain exceptions.

Enable’s ability to grow is dependent in part on its ability to access external financing sources on acceptable terms.

Enable expects that it will distribute all of its “available cash” to its unitholders. As a result, Enable is expected to rely significantly upon external financing sources, including commercial bank borrowings and the issuance of debt and equity securities, to fund acquisitions and expansion capital expenditures. To the extent Enable is unable to finance growth externally or through internally generated cash flows, Enable’s cash distribution policy may significantly impair its ability to grow. In addition, because Enable is expected to distribute all of its available cash, its growth may not be as fast as businesses that reinvest their available cash to expand ongoing operations.

To the extent Enable issues additional units in connection with any acquisitions or expansion capital expenditures, the payment of distributions on those additional units may increase the risk that Enable will be unable to maintain or increase its per unit distribution level, which in turn may impact the available cash that it has to distribute on each unit. There are no limitations in Enable’s partnership agreement on its ability to issue additional units, including units ranking senior to the common units. The incurrence of additional commercial borrowings or other debt by Enable to finance its growth strategy would result in increased interest expense, which in turn may negatively impact the available cash that Enable has to distribute to its unitholders.

Enable depends, in part, on access to the capital markets and other external financing sources to fund its expansion capital expenditures, although it has also increasingly relied on cash flow generated from operations. Historically, unit prices of midstream master limited partnerships have experienced periods of volatility. In addition, because Enable’s common units are yield-based securities, rising market interest rates could impact the relative attractiveness of its common units to investors. As a result of capital market volatility, Enable may be unable to issue equity or debt on satisfactory terms, or at all, which may limit its ability to expand its operations or make future acquisitions.

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Enable’s debt levels may limit its flexibility in obtaining additional financing and in pursuing other business opportunities.

As of December 31, 2018, Enable had approximately $2.9 billion of long-term debt outstanding, excluding the premiums, discounts and unamortized debt expense on their senior notes, $649 million outstanding under its commercial paper program and $500 million outstanding of its 2.40% senior notes dues 2019, excluding unamortized debt expense. Enable has a $1.75 billion revolving credit facility for working capital, capital expenditures and other partnership purposes, including acquisitions, with approximately $250 million in borrowings outstanding and $848 million remaining available as of February 1, 2019. Enable has the ability to incur additional debt, subject to limitations in its credit facilities. The levels of Enable’s debt could have important consequences, including the following:

• the ability to obtain additional financing, if necessary, for working capital, capital expenditures, acquisitions or other purposes may be impaired or the financing may not be available on favorable terms, if at all;

• a portion of cash flows will be required to make interest payments on the debt, reducing the funds that would otherwise be available for operations, future business opportunities and distributions;

• Enable’s debt level will make it more vulnerable to competitive pressures or a downturn in its business or the economy generally; and

• Enable’s debt level may limit its flexibility in responding to changing business and economic conditions.

Enable’s ability to service its debt will depend upon, among other things, its future financial and operating performance, which will be affected by prevailing economic conditions, commodity prices and financial, business, regulatory and other factors, some of which are beyond Enable’s control. If operating results are not sufficient to service current or future indebtedness, Enable may be forced to take actions such as reducing distributions, reducing or delaying business activities, acquisitions, investments or capital expenditures, selling assets, restructuring or refinancing debt, or seeking additional equity capital. These actions may not be effected on satisfactory terms, or at all.

Further, any reductions in Enable’s credit ratings could increase its financing costs and the cost of maintaining certain contractual relationships. Enable cannot assure that its credit ratings will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a rating agency if, in its judgment, circumstances warrant. If any of Enable’s credit ratings are below investment grade, it may have higher future borrowing costs, and Enable or its subsidiaries may be required to post cash collateral or letters of credit under certain contractual agreements. If cash collateral requirements were to occur at a time when Enable was experiencing significant working capital requirements or otherwise lacked liquidity, its financial position, results of operations and ability to make cash distributions could be adversely affected.

Enable’s credit facilities contain operating and financial restrictions, including covenants and restrictions that may be affected by events beyond Enable’s control, which could adversely affect its financial condition, results of operations and ability to make distributions.

Enable’s credit facilities contain customary covenants that, among other things, limit its ability to:

• permit its subsidiaries to incur or guarantee additional debt;

• incur or permit to exist certain liens on assets;

• dispose of assets;

• merge or consolidate with another company or engage in a change of control;

• enter into transactions with affiliates on non-arm’s length terms; and

• change the nature of its business.

Enable’s credit facilities also require it to maintain certain financial ratios. Enable’s ability to meet those financial ratios can be affected by events beyond its control, and we cannot assure you that it will meet those ratios. In addition, Enable’s credit facilities contain events of default customary for agreements of this nature.

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Enable’s ability to comply with the covenants and restrictions contained in its credit facilities may be affected by events beyond its control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, Enable’s ability to comply with these covenants may be impaired. If Enable violates any of the restrictions, covenants, ratios or tests in its credit facilities, a significant portion of its indebtedness may become immediately due and payable. In addition, Enable’s lenders’ commitments to make further loans to it under the revolving credit facility may be suspended or terminated. Enable might not have, or be able to obtain, sufficient funds to make these accelerated payments.

Enable’s businesses are exposed to various regulatory risks.

Enable’s operations are subject to extensive regulation by federal, state and local regulatory authorities. Changes or additional regulatory measures adopted by such authorities could adversely affect Enable’s financial position, results of operations and ability to make cash distributions. This regulation includes, but is not limited to, the following:

• Rate Regulation: The rates charged by several of Enable’s pipeline systems, including for interstate gas transportation service provided by its intrastate pipelines, are regulated by the FERC. Enable’s pipeline operations that are not regulated by the FERC may be subject to state and local regulation applicable to intrastate natural gas transportation services and crude oil gathering services. The FERC and state regulatory agencies also regulate other terms and conditions of the services Enable may offer. If one of these regulatory agencies, on its own initiative or due to challenges by third parties, were to lower its tariff rates or deny any rate increase or other material changes to the types, or terms and conditions, of service Enable might propose or offer, the profitability of Enable’s pipeline businesses could suffer.

• FERC Revised Policy Statement and NOPR: In a series of related issuances on March 15, 2018, the FERC issued a Revised Policy Statement stating that it will no longer permit pipelines organized as MLPs to recover an income tax allowance in their cost-of-service rates. On July 18, 2018, FERC issued a Final Rule adopting procedures that are generally the same as proposed in a March 15, 2018 NOPR implementing the Revised Policy Statement and the corporate income tax rate reduction with certain clarifications and modifications. For more information, please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Regulatory Matters” in Item 7 of Part II of this report, which discussion is incorporated herein by reference. If FERC requires Enable to establish new tariff rates for either its natural gas or crude oil pipelines that reflect a lower federal corporate income tax rate, it is possible the rates would be reduced, which could adversely affect Enable’s financial position, results of operations and ability to make cash distributions to its unitholders. With regard to FERC-jurisdictional rates on Enable’s crude oil pipelines, the FERC plans to address the Revised Policy Statement and corporate tax rate reduction in its next five-year review of the oil pipeline rate index, which will occur in 2020 and become effective July 1, 2021. The potential rate impacts from the revision are currently uncertain.

• Permits, Licenses and Approvals: Enable may be unable to obtain or renew federal or state permits, licenses or approvals necessary for its operations, which could inhibit its ability to do business. All of these permits, licenses, approval limits and standards require a significant amount of monitoring, record keeping and reporting to demonstrate compliance with the underlying permit, license, approval limit or standard. Noncompliance or incomplete documentation of Enable’s compliance status may result in the imposition of fines, penalties and injunctive relief. Further, to obtain new permits or renew permits and other approvals in the future, Enable may be required to prepare and present data to governmental authorities pertaining to potential adverse impact of a proposed project. Compliance with these regulatory requirements may be expensive and may significantly lengthen the time required to prepare applications and to receive authorizations and consequently could disrupt Enable’s project construction schedules;

• Hydraulic Fracturing Regulation: Increased regulation of hydraulic fracturing and waste water injection wells could result in reductions or delays in natural gas or crude oil production by Enable’s customers, which could adversely affect its financial position, results of operations and ability to make cash distributions; and

• Jurisdictional Characterization of Assets: Enable’s natural gas gathering and intrastate transportation systems are generally exempt from the jurisdiction of the FERC under the NGA, and its crude oil gathering system in the Anadarko Basin is generally exempt from the jurisdiction of the FERC under ICA. FERC regulation may indirectly impact these businesses and the markets for products derived from these businesses. Natural gas gathering and intrastate crude oil gathering may receive greater regulatory scrutiny at the state level; therefore, Enable’s operations could be adversely affected should they become subject to the application of state regulation of rates and services. A change in the jurisdictional characterization of some of Enable’s assets by federal, state or local regulatory agencies or a change in policy by those agencies may result in increased regulation of its assets, which may cause its revenues to decline and operating expenses to increase.

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Other Risk Factors Affecting Our Businesses or CenterPoint Energy’s Interests in Enable Midstream Partners, LP

The success of the Merger depends, in part, on CenterPoint Energy’s ability to realize anticipated benefits and conduct an effective integration process.

The success of the Merger will depend, in part, on CenterPoint Energy’s ability to realize the expected benefits in the anticipated timeframe, including operating efficiencies, growth opportunities, cost savings and customer retention, from integrating CenterPoint Energy’s and Vectren’s businesses, while at the same time continuing to provide consistent, high quality services. The integration process could be complex, costly and time consuming, including the diversion of significant management time and resources thereto, and may result in the following challenges, among others:

• unanticipated delays, disruptions, issues or costs in integrating operations, financial and accounting, information technology, communications and other systems;

• potential inconsistencies in procedures, practices, policies, controls, and standards;

• possible differences in compensation arrangements, management perspectives and corporate culture; and

• loss of or difficulties retaining talented employees or valuable third-party relationships.

CenterPoint Energy must also successfully integrate its systems of internal controls to accurately provide reliable financial reports, including reporting of its financial condition, results of operations or cash flows, effectively prevent fraud and operate successfully as a public company. If CenterPoint Energy’s efforts to integrate and maintain an effective system of internal controls are not successful, it is unable to maintain adequate controls over its financial reporting and processes in the future or it is unable to comply with its obligations under Section 404 of the Sarbanes-Oxley Act of 2002, CenterPoint Energy’s operating results could be harmed or it may fail to meet its reporting obligations. Ineffective internal controls also could cause investors to lose confidence in CenterPoint Energy’s reported financial information, which would likely have a negative effect on the trading prices of its securities.

Even with the successful integration of the businesses, CenterPoint Energy may not achieve the expected results or economic benefits, including any expected revenue or synergy opportunities. Failure to fully realize the anticipated benefits could adversely affect CenterPoint Energy’s results of operations, financial condition and cash flows and have a negative effect on the trading prices of its securities.

Cyber-attacks, physical security breaches, acts of terrorism or other disruptions could adversely impact our or Enable’s reputation, results of operations, financial condition and/or cash flows.

We and Enable are subject to cyber and physical security risks related to adversaries attacking information technology systems, network infrastructure, technology and facilities used to conduct almost all of our and Enable’s business, which includes, among other things, (i) managing operations and other business processes and (ii) protecting sensitive information maintained in the normal course of business. For example, the operation of our electric transmission and distribution system is dependent on not only physical interconnection of our facilities but also on communications among the various components of our system. This reliance on information and communication between and among those components has increased since deployment of smart meters and the intelligent grid. Further, certain of the various internal systems we use to conduct our businesses are highly integrated. Consequently, a cyber-attack or unauthorized access in any one of these systems could potentially impact the other systems.

Similarly, our and Enable’s business operations are interconnected with external networks and facilities. The distribution of natural gas to our customers requires communications with Enable’s pipeline facilities and third-party systems. The gathering, processing and transportation of natural gas from Enable’s gathering, processing and pipeline facilities and crude oil gathering pipeline systems also rely on communications among its facilities and with third-party systems that may be delivering natural gas or crude oil into or receiving natural gas or crude oil and other products from Enable’s facilities. Disruption of those communications, whether caused by physical disruption such as storms or other natural disasters, by failure of equipment or technology or by manmade events, such as cyber-attacks or acts of terrorism, may disrupt our or Enable’s ability to conduct operations and control assets.

Cyber-attacks and unauthorized access could also result in the loss, or unauthorized use, of confidential, proprietary or critical infrastructure data or security breaches of other information technology systems that could disrupt operations and critical business functions, adversely affect reputation, increase costs and subject us or Enable to possible legal claims and liability. Further, third parties, including vendors, suppliers and contractors, who perform certain services for us or administer and maintain our sensitive

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information, could also be targets of cyber-attacks and unauthorized access. Neither we nor Enable is fully insured against all cyber-security risks, any of which could adversely affect our reputation and could have a material adverse effect on either our or Enable’s results of operations, financial condition and/or cash flows.

As domestic and global cyber threats are on-going and increasing in sophistication, magnitude and frequency, our and Enable’s critical energy infrastructure may be targets of terrorist activities or otherwise that could disrupt our respective business operations. Any such disruptions could result in significant costs to repair damaged facilities and implement increased security measures, which could have a material adverse effect on either our or Enable’s results of operations, financial condition and/or cash flows.

Failure to maintain the security of personally identifiable information could adversely affect us.

In connection with our business we and our vendors, suppliers and contractors collect and retain personally identifiable information (e.g., information of our customers, shareholders, suppliers and employees), and there is an expectation that we and such third parties will adequately protect that information. The U.S. regulatory environment surrounding information security and privacy is increasingly demanding. New laws and regulations governing data privacy and the unauthorized disclosure of confidential information, including recent California legislation, pose increasingly complex compliance challenges and potentially elevate our costs. Any failure by us to comply with these laws and regulations, including as a result of a security or privacy breach, could result in significant penalties and liabilities for us. A significant theft, loss or fraudulent use of the personally identifiable information we maintain or failure of our vendors, suppliers and contractors to use or maintain such data in accordance with contractual provisions could adversely impact our reputation and could result in significant costs, fines, litigation. Additionally, if we acquire a company that has violated or is not in compliance with applicable data protection laws, we may incur significant liabilities and penalties as a result.

We are subject to operational and financial risks and liabilities arising from environmental laws and regulations.

Our operations and the operations of Enable are subject to stringent and complex laws and regulations pertaining to the environment. As an owner or operator of natural gas pipelines, distribution systems and storage, electric generating facilities and electric transmission and distribution systems, and the facilities that support these systems, we must comply with these laws and regulations at the federal, state and local levels. These laws and regulations can restrict or impact our business activities in many ways, such as:

• restricting the way we manage hazardous and non-hazardous wastes;

• limiting or prohibiting construction activities in sensitive areas such as wetlands, coastal regions, or areas inhabited by endangered species;

• requiring remedial action and monitoring to mitigate environmental conditions caused by our operations, or attributable to former operations;

• limiting airborne emissions from electric generating facilities, including particulate matter, sulfur dioxide (SO₂), nitrogen oxides (NOx) and mercury, and the disposal non-hazardous substances such as coal combustion residuals, among others;

• enjoining the operations of facilities with permits issued pursuant to such environmental laws and regulations; and

• impacting the demand for our services by directly or indirectly affecting the use or price of natural gas.

To comply with these requirements, we may need to spend substantial amounts and devote other resources from time to time to:

• construct or acquire new facilities and equipment;

• acquire permits for facility operations;

• modify or replace existing and proposed equipment; and

• decommission or remediate waste management areas, fuel storage facilities and other locations.

Failure to comply with these laws and regulations may trigger a variety of administrative, civil and criminal enforcement measures, including the assessment of monetary penalties, the imposition of remedial actions, and the issuance of orders enjoining

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future operations. Certain environmental statutes impose strict joint and several liability for costs required to clean, restore and monitor sites where hazardous substances have been stored, disposed or released. Moreover, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the release of hazardous substances or other waste products into the environment.

In April 2015, the EPA finalized its CCR Rule, which regulates ash as non­hazardous material under the RCRA. Under the CCR Rule, Indiana Electric is required to complete integrity assessments and groundwater monitoring studies. In January 2018, Indiana Electric completed its first annual groundwater monitoring and corrective action report. This report identified localized impacts to groundwater near Indiana Electric’s coal impoundments. Further analysis is ongoing. In October 2018, Indiana Electric completed the CCR Rule’s required evaluation of the placement of Indiana Electric’s coal ash ponds relative to the uppermost aquifer. This evaluation indicated that Indiana Electric must cease placing materials into the ash ponds by October 31, 2020 and initiate closure of the ponds thereafter. However, the October 2020 closure deadline, which resulted from a July 2018 amendment to the CCR Rule, is being challenged in the D.C. Circuit. Were the July 2018 amendment vacated, the deadline for Indiana Electric to cease placing materials into the ash ponds and initiate closure could revert to the original April 2019 deadline. However, the CCR Rule allows for a pond to continue receiving materials beyond the deadline for closure upon certification that there is an absence of alternative disposal capacity. Indiana Electric plans to seek such an extension that would allow it to continue to use the ponds through completion of the generation transition plans by December 31, 2023. Failure to obtain this extension may result in increased and potentially significant operational costs in connection with the accelerated implementation of an alternative ash disposal system or adversely impact Indiana Electric’s future operations. Failure to comply with these requirements could also result in an enforcement proceeding including imposition of fines and penalties. Further, a release of coal ash that presents an imminent and substantial endangerment to health of the environment could result in remediation costs, civil and/or criminal penalties, claims, litigation, increased regulation and compliance costs and reputational damage, all of which could adversely affect the financial condition of Indiana Electric.

The recent trend in environmental regulation has been to place more restrictions and limitations on activities that may impact the environment, and thus there can be no assurance as to the amount or timing of future expenditures for environmental compliance or remediation, and actual future expenditures may be greater than the amounts we currently anticipate.

Our insurance coverage may not be sufficient. Insufficient insurance coverage and increased insurance costs could adversely impact our results of operations, financial condition and cash flows.

We currently have general liability and property insurance in place to cover certain of our facilities in amounts that we consider appropriate. Such policies are subject to certain limits and deductibles and do not include business interruption coverage. Insurance coverage may not be available in the future at current costs or on commercially reasonable terms, and the insurance proceeds received for any loss of, or any damage to, any of our facilities may not be sufficient to restore the loss or damage without negative impact on our results of operations, financial condition and cash flows.

In common with other companies in its line of business that serve coastal regions, Houston Electric does not have insurance covering its transmission and distribution system, other than substations, because Houston Electric believes it to be cost prohibitive and believes insurance capacity to be limited. Historically, Houston Electric has been able to recover the costs incurred in restoring its transmission and distribution properties following hurricanes or other disasters through issuance of storm restoration bonds or a change in its regulated rates or otherwise. In the future, any such recovery may not be granted. Therefore, Houston Electric may not be able to restore any loss of, or damage to, any of its transmission and distribution properties without negative impact on its results of operations, financial condition and cash flows.

Enable is not fully insured against all risks inherent in its business. Enable currently has general liability and property insurance in place to cover certain of its facilities in amounts that Enable considers appropriate. Such policies are subject to certain limits and deductibles. Enable does not have business interruption insurance coverage for all of its operations. Insurance coverage may not be available in the future at current costs or on commercially reasonable terms, and the insurance proceeds received for any loss of, or any damage to, any of Enable’s facilities may not be sufficient to restore the loss or damage without negative impact on its results of operations and its ability to make cash distributions.

Our operations and Enable’s operations are subject to all of the risks and hazards inherent in the gathering, processing, transportation and storage of natural gas and crude oil, including:

• damage to pipelines and plants, related equipment and surrounding properties caused by hurricanes, tornadoes, floods, fires, earthquakes and other natural disasters, acts of terrorism and actions by third parties;

• inadvertent damage from construction, vehicles and farm and utility equipment;

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• leaks of natural gas, NGLs, crude oil and other hydrocarbons or losses of natural gas, NGLs and crude oil as a result of the malfunction of equipment or facilities;

• ruptures, fires and explosions; and

• other hazards that could also result in personal injury and loss of life, pollution and suspension of operations.

These risks could result in substantial losses due to personal injury and/or loss of life, severe damage to and destruction of property, plant and equipment and pollution or other environmental damage. These risks may also result in curtailment or suspension of our or Enable’s operations. A natural disaster or other hazard affecting the areas in which we or Enable operate could have a material adverse effect on our or Enable’s operations.

The Registrants could incur liabilities associated with businesses and assets that they have transferred to others.

Under some circumstances, the Registrants could incur liabilities associated with assets and businesses no longer owned by them. These assets and businesses were previously owned by Reliant Energy, a predecessor of Houston Electric, directly or through subsidiaries and include:

• merchant energy, energy trading and REP businesses transferred to RRI or its subsidiaries in connection with the organization and capitalization of RRI prior to its initial public offering in 2001 and now owned by affiliates of NRG; and

• Texas electric generating facilities transferred to a subsidiary of Texas Genco in 2002, later sold to a third party and now owned by an affiliate of NRG.

In connection with the organization and capitalization of RRI (now GenOn) and Texas Genco (now an affiliate of NRG), those companies and/or their subsidiaries assumed liabilities associated with various assets and businesses transferred to them and agreed to certain indemnity agreements of the Registrants. Such indemnities have applied in various asbestos and other environmental matters that arise from time to time and cases such as the litigation arising out of sales of natural gas in California and other markets (further appellate review of the last remaining case involving CES, a subsidiary of CERC Corp., has been stayed pending approval of a settlement agreement following the Ninth Court of Appeals’ reversal in August 2018 of the district court’s grant of summary judgment in favor of CES). In June 2017, GenOn and various affiliates filed for protection under Chapter 11 of the U.S. Bankruptcy Code. CenterPoint Energy, CERC and CES submitted proofs of claim in the bankruptcy proceedings to protect their indemnity rights. In October 2018, CES, GenOn, and the plaintiffs reached an agreement to settle all claims against CES and CES’s indemnity claims against GenOn, subject to approvals by the bankruptcy court and the federal district court. In December 2018, GenOn completed its reorganization and emerged from Chapter 11, and in January 2019, the bankruptcy court approved the settlement between CES and GenOn. If the settlement agreement between CES, GenOn and the plaintiffs is not approved by the federal district court, CES could incur liability and be responsible for satisfying it.

In connection with our sale of Texas Genco, the separation agreement was amended to provide that Texas Genco would no longer be liable for, and CenterPoint Energy would assume and agree to indemnify Texas Genco against, liabilities that Texas Genco originally assumed in connection with its organization to the extent, and only to the extent, that such liabilities are covered by certain insurance policies held by CenterPoint Energy, and in certain of the asbestos lawsuits CenterPoint Energy has agreed to continue to defend such claims to the extent they are covered by insurance maintained by CenterPoint Energy, subject to reimbursement of the costs of such defense by an NRG affiliate.

Our results of operations, financial condition and cash flows may be adversely affected if we are unable to successfully operate our facilities or perform certain corporate functions.

Our performance depends on the successful operation of our facilities. Operating these facilities involves many risks, including:

• operator error or failure of equipment or processes, including failure to follow appropriate safety protocols;

• the handling of hazardous equipment or materials that could result in serious personal injury, loss of life and environmental and property damage;

• operating limitations that may be imposed by environmental or other regulatory requirements;

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• labor disputes;

• information technology or financial system failures, including those due to the implementation and integration of new technology, that impair our information technology infrastructure, reporting systems or disrupt normal business operations;

• information technology failure that affects our ability to access customer information or causes us to lose confidential or proprietary data that materially and adversely affects our reputation or exposes us to legal claims; and

• catastrophic events such as fires, earthquakes, explosions, leaks, floods, droughts, hurricanes, terrorism, pandemic health events or other similar occurrences, which may require participation in mutual assistance efforts by us or other utilities to assist in power restoration efforts.

Such events may result in a decrease or elimination of revenue from our facilities, an increase in the cost of operating our facilities or delays in cash collections, any of which could have a material adverse effect on our results of operations, financial condition and/or cash flows.

Our and Enable’s success depends upon our and Enable’s ability to attract, effectively transition, motivate and retain key employees and identify and develop talent to succeed senior management.

We and Enable depend on senior executive officers and other key personnel. Our and Enable’s success depends on our and Enable’s ability to attract, effectively transition and retain key personnel. The inability to recruit and retain or effectively transition key personnel or the unexpected loss of key personnel may adversely affect our and Enable’s operations. In addition, because of the reliance on our and Enable’s management team, our and Enable’s future success depends in part on our and Enable’s ability to identify and develop talent to succeed senior management. The retention of key personnel and appropriate senior management succession planning will continue to be critically important to the successful implementation of our and Enable’s strategies.

Failure to attract and retain an appropriately qualified workforce could adversely impact our and Enable’s results of operations.

Our and Enable’s businesses are dependent on recruiting, retaining and motivating employees. Certain circumstances, such as an aging workforce without appropriate replacements, a mismatch of existing skillsets to future needs, or the unavailability of contract resources may lead to operating challenges such as a lack of resources, loss of knowledge or a lengthy time period associated with skill development. Our and Enable’s costs, including costs to replace employees, productivity costs and safety costs, may rise. Failure to hire and adequately train replacement employees, including the transfer of significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect the ability to manage and operate our and Enable’s businesses. If we and Enable are unable to successfully attract and retain an appropriately qualified workforce, our and Enable’s results of operations could be negatively affected.

Climate change legislation and regulatory initiatives could result in increased operating costs and reduced demand for our or Enable’s services.

Regulatory agencies have from time to time considered adopting new legislation and/or modifying existing laws and regulations, to reduce GHGs, and there continues to be a wide-ranging policy and regulatory debate, both nationally and internationally, regarding the potential impact of GHGs and possible means for their regulation.  Efforts have been made and continue to be made in the international community toward the adoption of international treaties or protocols that would address global climate change issues.

Due to the electric generating facilities acquired in the Merger, CenterPoint Energy is subject to the requirements of the CPP, which requires a 32% reduction in carbon emissions from 2005 levels. While implementation of the CPP remains uncertain due to the February 2016 U.S. Supreme Court stay delaying implementation during court challenges and an October 2017 proposed rule from the EPA which, if finalized, would result in the CPP’s repeal, as written the CPP may substantially affect both the costs and operating characteristics of CenterPoint Energy’s fossil fuel generating plants and NGD business. In August 2018, the EPA proposed a CPP replacement rule, the Affordable Clean Energy (ACE) rule, which, if finalized could similarly impact the costs of CenterPoint Energy’s fossil fuel generating plants. In addition to regulatory risk, we may be subject to climate change lawsuits which could result in substantial penalties or damages. Moreover, evolving investor sentiment related to the use of fossil fuels and initiatives to restrict continued production of fossil fuels may have substantial impacts on CenterPoint Energy’s electric generation and NGD businesses.

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Following a finding by the EPA that certain GHGs represent an endangerment to human health, the EPA adopted two sets of rules regulating GHG emissions under the Clean Air Act, one that requires a reduction in emissions of GHGs from motor vehicles and another that regulates emissions of GHGs from certain large stationary sources. The EPA has also expanded its existing GHG emissions reporting requirements. These permitting and reporting requirements could lead to further regulation of GHGs by the EPA. As a distributor and transporter of natural gas, or a consumer of natural gas in its pipeline and gathering businesses, NGD’s or Enable’s revenues, operating costs and capital requirements, as applicable, could be adversely affected as a result of any regulatory action that would require installation of new control technologies or a modification of its operations or would have the effect of reducing the consumption of natural gas. Further, Indiana Electric’s current generating facilities substantially rely on coal for their operations. Additionally, Houston Electric’s and Indiana Electric’s transmission and distribution businesses’ revenues could be adversely affected to the extent any resulting regulatory action has the effect of reducing consumption of electricity by ultimate consumers within its service territory. Likewise, incentives to conserve energy or use energy sources other than natural gas could result in a decrease in demand for our services.

Climate changes could adversely impact financial results from our and Enable’s businesses and result in more frequent and more severe weather events which could adversely affect the results of operations of our businesses.

A changing climate creates uncertainty and could result in broad changes, both physical and financial in nature, to our service territories. If climate changes occur that result in warmer temperatures in our service territories, financial results from our and Enable’s businesses could be adversely impacted. For example, NGD could be adversely affected through lower natural gas sales and Enable’s natural gas gathering, processing and transportation and crude oil gathering businesses could experience lower revenues. Another possible result of climate change is more frequent and more severe weather events, such as hurricanes, tornadoes or ice storms.  Since many of our facilities are located along or near the Gulf Coast, increased or more severe hurricanes or tornadoes could increase our costs to repair damaged facilities and restore service to our customers.  When we cannot deliver electricity or natural gas to customers or our customers cannot receive our services, our financial results can be impacted by lost revenues, and we generally must seek approval from regulators to recover restoration costs.  To the extent we are unable to recover those costs, or if higher rates resulting from our recovery of such costs result in reduced demand for our services, our future financial results may be adversely impacted. Decreased energy use may also require us to retire current infrastructure that is no longer needed.

We are uncertain how state commissions and local municipalities may require us to respond to the effects of the TCJA, and these regulatory requirements may adversely affect our results of operations, financial condition and cash flows.

On December 22, 2017, President Trump signed into law the TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018, including, but not limited to, a reduction in the corporate income tax rate.

For Houston Electric, Indiana Electric and NGD, federal income tax expense is included in the rates approved by state commissions and local municipalities and charged by those utilities to consumers. When Houston Electric, Indiana Electric and NGD have general rate cases and other periodic rate adjustments, we expect the lower corporate tax expense resulting from the TCJA (which includes determining the treatment of EDIT), along with other increases and decreases in our revenue requirements, to be incorporated into Houston Electric’s, Indiana Electric’s and NGD’s future rates. Nevertheless, regulators may require us to respond to the TCJA in other ways, including through faster recoveries of reductions in federal income tax expense, accounting orders to reflect a liability to return to customers in future rate proceedings, accelerated returns to consumers of previously collected deferred federal income taxes, increased funding of infrastructure upgrades, or offsets of future rate increases. The effect on us of any potential return of tax savings resulting from the TCJA to consumers may differ depending on how each regulatory body requires us to return such savings. We can provide no assurances on how any regulatory body will ultimately require us to act. As such, we are currently unable to determine the impact of these potential regulatory actions in response to the enactment of the TCJA, which may adversely affect our results of operations, financial condition and cash flows. For further information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Regulatory Matters” in Item 7 of Part II of this report.

In addition, the TCJA also includes a variety of other changes, such as a limitation on the tax deductibility of interest expense and acceleration of business asset expensing, among others. Several provisions of the TCJA are not generally applicable to the public utility industry, including the limitation on the tax deductibility of interest expense and the acceleration of business asset expensing. We continue to assess the impact that the TCJA may have on our future results of operations, financial condition and cash flows, which impact may adversely affect our future results of operations, financial condition and cash flows.

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NGD and Enable may incur significant costs and liabilities resulting from pipeline integrity and other similar programs and related repairs.

Certain of NGD’s and Enable’s pipeline operations are subject to pipeline safety laws and regulations. The DOT’s PHMSA has adopted regulations requiring pipeline operators to develop integrity management programs, including more frequent inspections and other measures, for transportation pipelines located in “high consequence areas,” which are those areas where a leak or rupture could do the most harm. The regulations require pipeline operators, including NGD and Enable, to, among other things:

• perform ongoing assessments of pipeline integrity;

• develop a baseline plan to prioritize the assessment of a covered pipeline segment;

• identify and characterize applicable threats that could impact a high consequence area;

• improve data collection, integration, and analysis;

• develop processes for performance management, record keeping, management of change and communication;

• repair and remediate pipelines as necessary; and

• implement preventive and mitigating action.

Failure to comply with PHMSA or analogous state pipeline safety regulations could result in a number of consequences that may have an adverse effect on NGD’s and Enable’s operations. Both NGD and Enable incur significant costs associated with their compliance with existing PHMSA and comparable state regulations, which may not be recoverable in rates.

Changes to pipeline safety laws and regulations that result in more stringent or costly safety standards could have a significant adverse effect on NGD and Enable. Changes to pipeline safety regulations occur frequently. For example, PHMSA is expected to publish finalized regulations in 2019, for both natural gas and hazardous liquids pipelines, that will significantly extend and expand the reach of certain PHMSA integrity management requirements (e.g., period assessments, leak detection and repairs) regardless of proximity to a high consequence area. The final rules may also impose new requirements for certain unregulated pipelines, including gathering lines. The adoption of new regulations requiring more comprehensive or stringent safety standards could require us to install new or modified safety controls, pursue new capital projects, or conduct maintenance programs on an accelerated basis, all of which could require us and Enable to incur increased and potentially significant operational costs.

Aging infrastructure may lead to increased costs and disruptions in operations that could negatively impact our financial results.

We have risks associated with aging infrastructure assets. The age of certain of our assets may result in a need for replacement, or higher level of maintenance costs as a result of our risk based federal and state compliant integrity management programs.  Failure to achieve timely recovery of these expenses could adversely impact revenues and could result in increased capital expenditures or expenses. Further, with respect to NGD’s operations, if certain pipeline replacements (for example, cast-iron or bare steel pipe) are not completed timely or successfully, government agencies and private parties might allege the uncompleted replacements caused events such as fires, explosions or leaks. Although we maintain insurance for certain of our facilities, our insurance coverage may not be sufficient in the event that a catastrophic loss is alleged to have been caused by a failure to timely complete equipment replacements. Insufficient insurance coverage and increased insurance costs could adversely impact our results of operations, financial condition and cash flows.

The operation of our facilities depends on good labor relations with our employees.

Several of our businesses have entered into and have in place collective bargaining agreements with different labor unions. We have several separate bargaining units, each with a unique collective bargaining agreement described below: 

• The collective bargaining agreement with IBEW Local 66 related to employees of Houston Electric is scheduled to expire in May 2020;

• The collective bargaining agreements with USW Locals 13-227 and 13-1 related to NGD’s employees in Texas are scheduled to expire in June 2022 and July 2022, respectively;

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• The collective bargaining agreements with Gas Workers Union Local 340, IBEW Local 949 and OPEIU Local 12 and Mankato related to NGD employees in Minnesota are scheduled to expire in April 2020, December 2020, May 2021 and March 2021, respectively;

• The collective bargaining agreements with IBEW Local 1393, USW Locals 12213 and 7441 related to employees of NGD in Indiana are scheduled to expire in December 2020;

• The collective bargaining agreements with the Teamsters, Chauffeurs, Warehousemen and Helpers Union Local 135 and Utility Workers Union Local 175 related to employees of Indiana Electric were recently renegotiated and are scheduled to expire in September 2021 and October 2021, respectively; and

• The collective bargaining agreement with IBEW Local 702 related to employees of Indiana Electric was scheduled to expire in June 2019 but was renegotiated in January 2019 with the ratification of a new three-year labor agreement.

Additionally, Infrastructure Services negotiates various trade agreements through contractor associations.  The two primary associations are the DCA and the PLCA.  These trade agreements are with a variety of construction unions including Laborer’s International Union of North America, International Union of Operating Engineers, United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry, and Teamsters.  The trade agreements have varying expiration dates in 2020, 2021 and 2022. In addition, these subsidiaries have various project agreements and small local agreements.  These agreements expire upon completion of a specific project or on various dates throughout the year.

Any failure to reach an agreement on new labor contracts or to negotiate these labor contracts might result in strikes, boycotts or other labor disruptions. These potential labor disruptions could have a material adverse effect on our businesses, results of operations and/or cash flows. Labor disruptions, strikes or significant negotiated wage and benefit increases, whether due to union activities, employee turnover or otherwise, could have a material adverse effect on our businesses, results of operations and/or cash flows.

Our businesses will continue to have to adapt to technological change and may not be successful or may have to incur significant expenditures to adapt to technological change.

We operate in businesses that require sophisticated data collection, processing systems, software and other technology. Some of the technologies supporting the industries we serve are changing rapidly and increasing in complexity. New technologies will emerge or grow that may be superior to, or may not be compatible with, some of our existing technologies, and may require us to make significant expenditures so that we can continue to provide cost-effective and reliable methods for energy production and delivery. Among such technological advances are distributed generation resources (e.g., private solar, microturbines, fuel cells), energy storage devices and more energy-efficient buildings and products designed to reduce consumption. As these technologies become a more cost-competitive option over time, whether through cost effectiveness or government incentives and subsidies, certain customers may choose to meet their own energy needs and subsequently decrease usage of our systems and services. Further, certain regulatory and legislative bodies have introduced or are considering requirements and/or incentives to reduce energy consumption by certain dates. Additionally, technological advances driven by federal laws mandating new levels of energy efficiency in end-use electric and natural gas devices or other improvements in or applications of technology could lead to declines in per capita energy consumption.

Our future success will depend, in part, on our ability to anticipate and adapt to these technological changes in a cost-effective manner and to offer, on a timely basis, reliable services that meet customer demands and evolving industry standards. If we fail to adapt successfully to any technological change or obsolescence, fail to obtain access to important technologies or incur significant expenditures in adapting to technological change, or if implemented technology does not operate as anticipated, our businesses, operating results, financial condition and cash flows could be materially and adversely affected.

Our or Enable’s potential business strategies and strategic initiatives, including merger and acquisition activities and the disposition of assets or businesses, may not be completed or perform as expected.

From time to time, we and Enable have made and may continue to make acquisitions or divestitures of businesses and assets, form joint ventures or undertake restructurings. However, suitable acquisition candidates or potential buyers may not continue to be available on terms and conditions we or Enable, as the case may be, find acceptable, or the expected benefits of completed acquisitions may not be realized fully or at all, or may not be realized in the anticipated timeframe. If we or Enable are unable to make acquisitions or if those acquisitions do not perform as anticipated, our and Enable’s future growth may be adversely affected.

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Any completed or future acquisitions involve substantial risks, including the following:

• acquired businesses or assets may not produce revenues, earnings or cash flow at anticipated levels;

• acquired businesses or assets could have environmental, permitting or other problems for which contractual protections prove inadequate;

• we or Enable may assume liabilities that were not disclosed to us, that exceed our estimates, or for which our rights to indemnification from the seller are limited;

• we or Enable may be unable to integrate acquired businesses successfully and realize anticipated economic, operational and other benefits in a timely manner, which could result in substantial costs and delays or other operational, technical or financial problems; and

• acquisitions, or the pursuit of acquisitions, could disrupt our or Enable’s ongoing businesses, distract management, divert resources and make it difficult to maintain current business standards, controls and procedures.    

We are involved in numerous legal proceedings, the outcomes of which are uncertain, and resolutions adverse to us could negatively affect our financial results.

The Registrants are subject to numerous legal proceedings, the most significant of which are summarized in Note 16 to the Registrants’ respective consolidated financial statements.

With respect to the Merger, in July 2018, seven separate lawsuits were filed against Vectren and the individual directors of Vectren’s Board of Directors in the U.S. District Court for the Southern District of Indiana. These lawsuits allege violations of Sections 14(a) of the Exchange Act and SEC Rule 14a-9 on the grounds that the Proxy Statement filed on June 18, 2018 was materially incomplete because it omitted material information concerning the Merger. The lawsuits also seek certification as class actions. In August 2018, the seven lawsuits were consolidated, and the Court denied the plaintiffs’ request for a preliminary injunction. The plaintiffs filed their Consolidated Amended Class Action Complaint on October 29, 2018, which Defendants have moved to dismiss and which motion remains pending. On December 28, 2018, two plaintiffs voluntarily dismissed their lawsuits. The defendants believe that the allegations asserted are without merit and intend to vigorously defend themselves against the claims raised.

Litigation is subject to many uncertainties, and the Registrants cannot predict the outcome of all matters with assurance. Final resolution of these matters may require additional expenditures over an extended period of time that may be in excess of established insurance or reserves and may have a material adverse effect on the Registrants’ financial results.

We are exposed to risks related to reduction in energy consumption due to factors including unfavorable economic conditions in our service territories.

Our businesses are affected by reduction in energy consumption due to factors including economic climate in our service territories, energy efficiency initiatives and use of alternative technologies, which could impact our ability to grow our customer base and our rate of growth. Growth in customer accounts and growth of customer usage each directly influence demand for electricity and the need for additional delivery facilities. Customer growth and customer usage are affected by a number of factors outside our control, such as mandated energy efficiency measures, demand-side management goals, distributed generation resources and economic and demographic conditions, such as population changes, job and income growth, housing starts, new business formation and the overall level of economic activity.

Declines in demand for electricity as a result of economic downturns in Houston Electric’s and Indiana Electric’s regulated electric service territories will reduce overall sales and lessen cash flows, especially as industrial customers reduce production and, therefore, consumption of electricity. Although Houston Electric’s and Indiana Electric’s transmission and distribution businesses are subject to regulated allowable rates of return and recovery of certain costs under periodic adjustment clauses, overall declines in electricity sold as a result of economic downturn or recession could reduce revenues and cash flows, thereby diminishing results of operations. Additionally, prolonged economic downturns that negatively impact results of operations and cash flows could result in future material impairment charges to write-down the carrying value of certain assets, including goodwill, to their respective fair values.

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For example, Houston Electric’s business is largely concentrated in Houston, Texas, where a higher percentage of employment is tied to the energy sector relative to other regions of the country. Although Houston, Texas has a diverse economy, employment in the energy industry remains important with overall Houston employment growing at a moderate rate in 2018. Further, the operations of Vectren’s utility businesses are concentrated in central and southern Indiana and west-central Ohio and are therefore impacted by changes in the Midwest economy in general and changes in particular industries concentrated in the Midwest.  These industries include automotive assembly, parts and accessories; feed, flour and grain processing; metal castings, plastic products; gypsum products; electrical equipment, metal specialties, glass and steel finishing; pharmaceutical and nutritional products; gasoline and oil products; ethanol; and coal mining.

In the event economic conditions further decline, the respective rates of growth in Houston, Indiana and the other areas in which we operate may also deteriorate. Changing market conditions, including changing regulation, changes in market prices of oil or other commodities, or changes in government regulation and assistance, may cause certain industrial customers to reduce or cease production and thereby decrease consumption of natural gas and/or electricity. Increases in customer defaults or delays in payment due to liquidity constraints could negatively impact our cash flows and financial condition. Some or all of these factors, could result in a lack of growth or decline in customer demand for electricity or number of customers, and may result in our failure to fully realize anticipated benefits from significant capital investments and expenditures, which could have a material adverse effect on their financial position, results of operations and cash flows.

Our businesses may be adversely affected by the intentional misconduct of our employees.

We are committed to living our core values of safety, integrity, accountability, initiative and respect and complying with all applicable laws and regulations. Despite that commitment and our efforts to prevent misconduct, it is possible for employees to engage in intentional misconduct, fail to uphold our core values, and violate laws and regulations for individual gain through contract or procurement fraud, misappropriation, bribery or corruption, fraudulent related-party transactions and serious breaches of our Ethics and Compliance Code and Standards of Conduct/Business Ethics policy, among other policies. If such intentional misconduct by employees should occur, it could result in substantial liability, higher costs, increased regulatory scrutiny and negative public perceptions, any of which could have a material adverse effect on our results of operations, financial condition and cash flows.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

The following discussion is based on the Registrants’ businesses and equity method investment as of December 31, 2018 and does not include Vectren and its subsidiaries.

Character of Ownership

We lease or own our principal properties in fee, including our corporate office space and various real property. Most of our electric lines and natural gas mains are located, pursuant to easements and other rights, on public roads or on land owned by others.

Electric Transmission & Distribution (CenterPoint Energy and Houston Electric)

For information regarding the properties of the Electric Transmission & Distribution reportable segment, please read “Business — Our Business — Electric Transmission & Distribution — Properties” in Item 1 of this report, which information is incorporated herein by reference.

Natural Gas Distribution (CenterPoint Energy and CERC)

For information regarding the properties of the Natural Gas Distribution reportable segment, please read “Business — Our Business — Natural Gas Distribution — Assets” in Item 1 of this report, which information is incorporated herein by reference.

Energy Services (CenterPoint Energy and CERC)

For information regarding the properties of the Energy Services reportable segment, please read “Business — Our Business — Energy Services — Assets” in Item 1 of this report, which information is incorporated herein by reference.

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Midstream Investments (CenterPoint Energy)

For information regarding the properties of the Midstream Investments reportable segment, please read “Business — Our Business — Midstream Investments” in Item 1 of this report, which information is incorporated herein by reference.

Other Operations (CenterPoint Energy and CERC)

For information regarding the properties of the Other Operations reportable segment, please read “Business — Our Business — Other Operations” in Item 1 of this report, which information is incorporated herein by reference.

Item 3. Legal Proceedings

For a discussion of material legal and regulatory proceedings affecting the Registrants as of December 31, 2018, please read “Business — Regulation” and “Business — Environmental Matters” in Item 1 of this report, “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Regulatory Matters” in Item 7 of this report and Note 16(d) to the consolidated financial statements, which information is incorporated herein by reference.

Item 4. Mine Safety Disclosures

Not applicable.

PART II

This combined Form 10-K is filed separately by three registrants: CenterPoint Energy, Houston Electric and CERC.

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

CenterPoint Energy

As of February 12, 2019, CenterPoint Energy’s common stock was held by approximately 28,987 shareholders of record. CenterPoint Energy’s common stock is listed on the NYSE and Chicago Stock Exchange and is traded under the symbol “CNP.”

The amount of future cash dividends will be subject to determination based upon CenterPoint Energy’s results of operations and financial condition, future business prospects, any applicable contractual restrictions and other factors that CenterPoint Energy’s Board of Directors considers relevant and will be declared at the discretion of CenterPoint Energy’s Board of Directors. For further information on CenterPoint Energy’s dividends, see Note 13 to the consolidated financial statements.

Repurchases of Equity Securities

During the quarter ended December 31, 2018, none of CenterPoint Energy’s equity securities registered pursuant to Section 12 of the Securities Exchange Act of 1934 were purchased by or on behalf of CenterPoint Energy or any “affiliated purchasers,” as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934.

Houston Electric

As of February 12, 2019, all of Houston Electric’s 1,000 outstanding common shares are held by Utility Holding, LLC, a wholly-owned subsidiary of CenterPoint Energy.

CERC

As of February 12, 2019, all of CERC Corp.’s 1,000 outstanding shares of common stock are held by Utility Holding, LLC, a wholly-owned subsidiary of CenterPoint Energy.

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Item 6.        Selected Financial Data (CenterPoint Energy)

The following table presents selected financial data with respect to CenterPoint Energy’s consolidated financial condition and consolidated results of operations and should be read in conjunction with CenterPoint Energy’s consolidated financial statements and the related notes in Item 8 of this report.

	Year Ended December 31,
	2018			2017				2016			2015				2014
	(in millions, except per share amounts)
Revenues	$	10,589		$	9,614			$	7,528		$	7,386			$	9,226
Equity in earnings (losses) of unconsolidated affiliates, net	307			265				208			(1,663		)	(2)	308
Income (loss) available to common shareholders	333			1,792			(1)	432			(692		)		611
Basic earnings (loss) per common share	0.74			4.16				1.00			(1.61		)		1.42
Diluted earnings (loss) per common share	0.74			4.13				1.00			(1.61		)		1.42
Cash dividends paid per common share	$	1.11		$	1.07			$	1.03		$	0.99			$	0.95
Dividend payout ratio	150		%	26		%		103		%	n/a				67		%
Return on average common equity	5		%	44		%		12		%	(17		)%		14		%
At year-end:
Book value per common share	$	16.08		$	10.88			$	8.04		$	8.05			$	10.58
Market price per common share	28.23			28.36				24.64			18.36				23.43
Market price as a percent of book value	176		%	261		%		306		%	228		%		221		%
Percentage of common units owned representing limited partner interests in Enable	54.0		%	54.1		%		54.1		%	55.4		%		55.4		%
Total assets (3) (4)	$	27,009		$	22,736			$	21,829		$	21,290			$	23,150
Short-term borrowings	—			39				35			40				53
Securitization Bonds, including current maturities (3)	1,435			1,868				2,278			2,667				3,037
Other long-term debt, including current maturities (3)	7,729			6,933				6,279			6,063				5,717
Capitalization:
Common stock equity	47		%	35		%		29		%	28		%		34		%
Long-term debt, including current maturities	53		%	65		%		71		%	72		%		66		%
Capitalization, excluding Securitization Bonds:
Common stock equity	51		%	40		%		36		%	36		%		44		%
Long-term debt, excluding Securitization Bonds, and including current maturities	49		%	60		%		64		%	64		%		56		%
Capital expenditures	$	1,720		$	1,494			$	1,406		$	1,575			$	1,402

(1) Net income for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 to the consolidated financial statements for further discussion of the impacts of the TCJA implementation.

(2) This amount includes $1,846 million of non-cash impairment charges related to Enable.

(3) Amounts for 2014 and 2015 have been recast to reflect adoption of ASU 2015-03.

(4) Total assets as of December 31, 2018 include cash and cash equivalents of $4.2 billion.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

No Registrant makes any representations as to the information related solely to CenterPoint Energy or the subsidiaries of CenterPoint Energy other than itself.

The following combined discussion and analysis should be read in combination with the consolidated financial statements included in Item 8 herein. When discussing CenterPoint Energy’s consolidated financial information, it includes the results of Houston Electric and CERC, which, along with CenterPoint Energy, are collectively referred to as the Registrants. Where appropriate, information relating to a specific registrant has been segregated and labeled as such. Unless the context indicates otherwise, specific references to Houston Electric and CERC also pertain to CenterPoint Energy. In this combined Form 10-K, the terms “our,” “we” and “us” are used as abbreviated references to CenterPoint Energy, Inc. together with its consolidated subsidiaries.

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Because the Merger closed after December 31, 2018, unless otherwise specifically indicated, the Registrants’ respective consolidated financial statements and notes thereto and the discussion of the Registrants’ financial condition, results of operations, tax payments and other financial and business-related information herein do not include or take into account Vectren and its subsidiaries, the closing of the Merger and the effects of the Merger. See Note 4 to the consolidated financial statements for further information related to the Merger.

OVERVIEW

Background

CenterPoint Energy, Inc. is a public utility holding company and owns interests in Enable as described below. CenterPoint Energy’s operating subsidiaries, Houston Electric and CERC Corp., own and operate electric transmission and distribution and natural gas distribution facilities and supply natural gas to commercial and industrial customers and electric and natural gas utilities.

• Houston Electric engages in the electric transmission and distribution business in the Texas Gulf Coast area that includes the city of Houston; and

• CERC Corp. (i) owns and operates natural gas distribution systems in six states and (ii) obtains and offers competitive variable and fixed-price physical natural gas supplies and services primarily to commercial and industrial customers and electric and natural gas utilities in over 30 states through its wholly-owned subsidiary, CES.

As of December 31, 2018, CenterPoint Energy, indirectly through CNP Midstream, owned approximately 54.0% of the common units representing limited partner interests in Enable, 50% of the management rights and 40% of the incentive distribution rights in Enable GP and also directly owned an aggregate of 14,520,000 Enable Series A Preferred Units. Enable owns, operates and develops natural gas and crude oil infrastructure assets.

On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. For further discussion of the Merger, see Note 4 to the consolidated financial statements.

Reportable Segments

In this Management’s Discussion and Analysis, we discuss our results from continuing operations on a consolidated basis and individually for each of our reportable segments, which are listed below. We also discuss our liquidity, capital resources and critical accounting policies. We are first and foremost an energy delivery company and it is our intention to remain focused on these segments of the energy business. The results of our business operations are significantly impacted by weather, customer growth, economic conditions, cost management, competition, rate proceedings before regulatory agencies and other actions of the various regulatory agencies to whose jurisdiction we are subject, among other factors.

• Electric transmission and distribution services are subject to rate regulation and are reported in the Electric Transmission & Distribution reportable segment, as are impacts of generation-related stranded costs and other true-up balances recoverable by the regulated electric utility. For further information about the Electric Transmission & Distribution reportable segment, see “Business — Our Business — Electric Transmission & Distribution” in Item 1 of Part I of this report.

• Natural gas distribution services are also subject to rate regulation and are reported in the Natural Gas Distribution reportable segment. For further information about the Natural Gas Distribution reportable segment, see “Business — Our Business — Natural Gas Distribution” in Item 1 of Part I of this report.

• The Energy Services reportable segment includes non-rate regulated natural gas sales to, and transportation and storage services, for commercial and industrial customers. For further information about the Energy Services reportable segment, see “Business — Our Business — Energy Services” in Item 1 of Part I of this report.

• The results of the Midstream Investments reportable segment are dependent upon the results of Enable, which are driven primarily by the volume of natural gas, NGLs and crude oil that Enable gathers, processes and transports across its systems and other factors as discussed below under “— Factors Influencing Midstream Investments.”

• CenterPoint Energy’s Other Operations reportable segment includes office buildings and other real estate used for business operations, home repair protection plans through a third party and other corporate support operations that support

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CenterPoint Energy’s business operations. CERC’s Other Operations reportable segment includes unallocated corporate costs and inter-segment eliminations.

EXECUTIVE SUMMARY

We expect our and Enable’s businesses to continue to be affected by the key factors and trends discussed below. Our expectations are based on assumptions made by us and information currently available to us. To the extent our underlying assumptions about, or interpretations of, available information prove to be incorrect, our actual results may vary materially from our expected results.

Factors Influencing Our Businesses and Industry Trends

We are an energy delivery company. The majority of our revenues are generated from the transmission and delivery of electricity and the sale of natural gas by our subsidiaries, Houston Electric and CERC, respectively. The Electric Transmission & Distribution reportable segment does not own or operate electric generating facilities or make retail sales to end-use electric customers. To assess our financial performance, our management primarily monitors operating income and cash flows, among other things, from our reportable segments. Within these broader financial measures, we monitor margins, operation and maintenance expense, interest expense, capital spending and working capital requirements. In addition to these financial measures, we also monitor a number of variables that management considers important to our reportable segments, including the number of customers, throughput, use per customer, commodity prices and heating and cooling degree days. From an operational standpoint, we monitor safety factors, system reliability and customer satisfaction to gauge our performance.

The nature of our businesses requires significant amounts of capital investment, and we rely on internally generated cash, borrowings under our credit facilities, proceeds from commercial paper and issuances of debt and equity in the capital markets to satisfy these capital needs. We strive to maintain investment grade ratings for our securities to access the capital markets on terms we consider reasonable. A reduction in our ratings generally would increase our borrowing costs for new issuances of debt, as well as borrowing costs under our existing revolving credit facilities, and may prevent us from accessing the commercial paper markets. Disruptions in the financial markets can also affect the availability of new capital on terms we consider attractive. In those circumstances, we may not be able to obtain certain types of external financing or may be required to accept terms less favorable than they would otherwise accept. For that reason, we seek to maintain adequate liquidity for our businesses through existing credit facilities and prudent refinancing of existing debt.

Long-term national trends indicate customers have reduced their energy consumption, which could adversely affect our results. However, due to more affordable energy prices and continued economic improvement in the areas we serve, the trend toward lower usage has slowed. 

To the extent adverse economic conditions affect our suppliers and customers, results from our energy delivery businesses may suffer. For example, Houston Electric is largely concentrated in Houston, Texas, where a higher percentage of employment is tied to the energy sector relative to other regions of the country. Although Houston, Texas has a diverse economy, employment in the energy industry remains important with overall Houston employment growing at a moderate rate in 2018.

Also, adverse economic conditions, coupled with concerns for protecting the environment and increased availability of alternate energy sources, may cause consumers to use less energy or avoid expansions of their facilities, resulting in less demand for our services. To the extent population growth is affected by lower energy prices and there is financial pressure on some of our customers who operate within the energy industry, there may be an impact on the growth rate of our customer base and overall demand. Primarily due to the cyclical correction of over-building in multifamily residential construction, residential meter growth for Houston Electric remained at approximately 1.6% in 2018. Based on, among other things, the anticipated completion of more apartment units in 2019, management expects residential meter growth to increase this year to 2%, in line with long-term trends.

Performance of the Electric Transmission & Distribution reportable segment and the Natural Gas Distribution reportable segment is significantly influenced by energy usage per customer, which is significantly impacted by weather conditions. For Houston Electric, revenues are generally higher during the warmer months when more electricity is used for cooling purposes. For CERC’s NGD, demand for natural gas for heating purposes is generally higher in the colder months. Therefore, we compare our results on a weather-adjusted basis. 

Overall, in 2018 the Houston area experienced weather that was much closer to normal relative to 2017. Although January, April and November experienced colder than normal weather, this was offset during the remaining months of the year due to warmer than normal weather. While overall rainfall was higher than normal in 2018, it did not rise to the record rainfall levels experienced in 2017 that occurred largely due to Hurricane Harvey. After two years of consistently warmer than normal weather in 2016 and 2017 in our NGD territories, 2018 experienced a return to normal weather in the first and fourth quarters.

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Historically, both CenterPoint Energy’s TDU and CERC’s NGD have utilized weather hedges to help reduce the impact of mild weather on their financial results. CenterPoint Energy’s TDU and CERC’s NGD entered into a weather hedge for the 2017-2018 and 2018-2019 winter heating seasons in Texas where no weather normalization mechanisms exist. In CERC’s non-Texas jurisdictions, weather normalization mechanisms or decoupling in the Minnesota division help to mitigate the impact of abnormal weather on our financial results. 

In Minnesota and Arkansas for CERC, there are rate adjustment mechanisms to counter the impact of declining usage from energy efficiency improvements. In addition, in many of our service areas, particularly in the Houston area and Minnesota, as applicable to each registrant, we have benefited from growth in the number of customers, which could mitigate the effects of reduced consumption. We anticipate that this trend will continue as the regions’ economies continue to grow. The profitability of our businesses is influenced significantly by the regulatory treatment we receive from the various state and local regulators who set our electric and natural gas distribution rates.

With respect to upcoming general rate cases, as required by a settlement related to the TCJA filed with the PUCT in February 2018, Houston Electric expects to make its comprehensive base rate filing by the April 30, 2019 deadline.  The amount and other terms of the rate filing have not been established at this time. There is no guarantee that current rates will continue while that case is pending, or that the rate case will result in rates that fully recover Houston Electric’s costs or enable it to earn a reasonable return on its invested capital. The results of this rate case may significantly impact Houston Electric’s business.  

The Energy Services reportable segment contracts with customers for transportation, storage and sales of natural gas on an unregulated basis. Its operations serve customers throughout the United States. The segment is impacted by price differentials on both a regional and seasonal basis, as well as fluctuations in regional daily natural gas prices driven by weather and other market factors. While this business utilizes financial derivatives to mitigate the effects of price movements, it does not enter into risk management contracts for speculative purposes and evaluates VaR daily to monitor significant financial exposures to realized income. At the end of 2017, a weather-driven spike in natural gas prices caused the accrual of unusually high unrealized mark-to-market income, which substantially reversed in the first quarter of 2018 as natural gas prices normalized.

The regulation of natural gas pipelines and related facilities by federal and state regulatory agencies affects CERC’s business. In accordance with natural gas pipeline safety and integrity regulations, CERC is making, and will continue to make, significant capital investments in its service territories, which are necessary to help operate and maintain a safe, reliable and growing natural gas system. CERC’s compliance expenses may also increase as a result of preventative measures required under these regulations. Consequently, new rates in the areas it serves are necessary to recover these increasing costs.

Consistent with the regulatory treatment of pension costs, the Registrants defer the amount of pension expense that differs from the level of pension expense included in the Registrants’ base rates for the Electric Transmission & Distribution reportable segment and Natural Gas Distribution reportable segment in Texas. CenterPoint Energy expects to contribute a minimum of approximately $93 million to its pension plans in 2019.

Additional Considerations Relating to Vectren (CenterPoint Energy)

The following additional considerations affect the business and industry of the utility and non-utility businesses and operations of Vectren that CenterPoint Energy acquired upon consummation of the Merger. With respect to Vectren’s utilities, its natural gas operations (comprised of Indiana Gas, VEDO and SIGECO’s natural gas distribution business) provide natural gas distribution and transportation services to nearly 67% of Indiana and about 20% of Ohio, primarily in the west-central area.  Its electric operations (comprised of Indiana Electric) provide electric transmission and distribution services to southwestern Indiana, and include power generating and wholesale power operations.  In total, these utility operations supply natural gas and electricity to over one million customers in Indiana and Ohio.

Similar to Houston Electric and CERC’s NGD, sales of natural gas and electricity to residential and commercial customers are largely seasonal and are impacted by weather. Trends in the average consumption among natural gas residential and commercial customers have tended to decline as more efficient appliances and furnaces are installed, and as Vectren’s utilities have implemented conservation programs.  In Vectren’s two Indiana natural gas service territories, normal temperature adjustment and decoupling mechanisms largely mitigate the effect that would otherwise be caused by variations in volumes sold to these customers due to weather and changing consumption patterns. The Ohio natural gas service territory has a straight fixed variable rate design for its residential customers. This rate design mitigates approximately 90% of the Ohio service territory’s weather risk and risk of decreasing consumption specific to its small customer classes. While Indiana Electric has neither a normal temperature adjustment mechanism nor a decoupling mechanism, rate designs provide for a lost margin recovery mechanism that operates in tandem with conservation initiatives.

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Vectren’s non-utility operations include Infrastructure Services and energy services, provided through ESG. Infrastructure Services, through its wholly-owned subsidiaries, provides underground pipeline and repair services to many utilities, including Vectren’s utilities, as well as other industries.  ESG provides energy services through performance-based energy contracting operations and sustainable infrastructure services, such as renewables, distributed generation and combined heat and power projects.  ESG assists schools, hospitals, governmental facilities and other private institutions with reducing energy and maintenance costs by upgrading their facilities with energy-efficient equipment. ESG operates throughout the United States. 

Demand for Infrastructure Services remains high due to the aging infrastructure and evolving safety and reliability regulations across the United States. The long-term focus for Infrastructure Services is recurring work in both the distribution and transmission businesses, but opportunities for large transmission pipeline construction projects will continue to be pursued and Infrastructure Services is well positioned to do this work. The timing and recurrence of these large transmission projects is less predictable and may create volatility in its year-over-year results.

We believe the long-term outlook for ESG’s performance contracting and sustainable infrastructure opportunities remains strong with continued national focus expected on energy conservation and sustainability, renewable energy and security as power prices across the country rise and customer focus on new, efficient and clean sources of energy grows.

Factors Influencing Midstream Investments (CenterPoint Energy)

The results of CenterPoint Energy’s Midstream Investments reportable segment are dependent upon the results of Enable, which are driven primarily by the volume of natural gas, NGLs and crude oil that Enable gathers, processes and transports across its systems. These volumes depend significantly on the level of production from natural gas wells connected to Enable’s systems across a number of U.S. mid-continent markets. Aggregate production volumes are affected by the overall amount of oil and gas drilling and completion activities. Production must be maintained or increased by new drilling or other activity, because the production rate of oil and gas wells declines over time.

Enable expects its business to continue to be impacted by the trends affecting the midstream industry. Enable’s outlook is based on its management’s assumptions regarding the impact of these trends that it has developed by interpreting the information currently available to it. If Enable management’s assumptions or interpretation of available information prove to be incorrect, Enable’s future financial condition and results of operations may differ materially from its expectations.

Enable’s business is impacted by commodity prices, which have declined and otherwise experienced significant volatility in recent years. Commodity prices impact the drilling and production of natural gas and crude oil in the areas served by Enable’s systems. In addition, Enable’s processing arrangements expose it to commodity price fluctuations. Enable has attempted to mitigate the impact of commodity prices on its business by entering into hedges, focusing on contracting fee-based business and converting existing commodity-based contracts to fee-based contracts.

Enable’s long-term view is that natural gas and crude oil production in the U.S. will increase. Natural gas continues to be a critical component of energy demand in the U.S. Enable’s management believes that the prospects for continued natural gas demand are favorable and will be driven by population and economic growth, as well as the continued displacement of coal-fired power plants by natural gas-fired power plants due to the price of natural gas and stricter government environmental regulations on the mining and burning of coal. Enable’s management believes that increasing consumption of natural gas over the long term in these sectors will continue to drive demand for Enable’s natural gas gathering, processing, transportation and storage services.

Significant Events

Merger with Vectren. On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. For further discussion of the Merger, see Note 4 to the consolidated financial statements.

Credit Facility. On October 5, 2018, CenterPoint Energy terminated all remaining commitments by lenders to provide the Bridge Facility, which resulted in increased aggregate commitments under CenterPoint Energy’s revolving credit facility. For further information, see Note 14 to the consolidated financial statements.

Enable Midstream Spin. On September 4, 2018, CERC completed the Internal Spin of its equity investment in Enable and Enable GP. For further information regarding the Internal Spin, see Note 11 to the consolidated financial statements.

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Equity Offerings. On August 22, 2018, CenterPoint Energy completed an offering of its Series A Preferred Stock. On October 1, 2018, CenterPoint Energy completed concurrent equity offerings of depositary shares, each representing a 1/20th interest in a share of Series B Preferred Stock, and Common Stock. For further information about the equity offerings, see Note 13 to the consolidated financial statements.

Debt Transactions. In February 2018, Houston Electric issued $400 million aggregate principal amount of general mortgage bonds. In March 2018, CERC issued $600 million aggregate principal amount of unsecured senior notes. In October 2018, CenterPoint Energy issued $1.5 billion aggregate principal amount of senior notes. In January 2019, Houston Electric issued $700 million aggregate principal amount of general mortgage bonds. For further information about the Registrants’ debt issuance in 2018 and to date in 2019, see Note 14 to the consolidated financial statements.

Regulatory Proceedings. For details related to pending and completed regulatory proceedings during 2018 and to date in 2019, see “—Liquidity and Capital Resources — Regulatory Matters” below.

CERTAIN FACTORS AFFECTING FUTURE EARNINGS

Our past earnings and results of operations are not necessarily indicative of our future earnings and results of operations. The magnitude of our and Enable’s future earnings and results of our and Enable’s operations will depend on or be affected by numerous factors that apply to all Registrants unless otherwise indicated including:

• the performance of Enable, the amount of cash distributions CenterPoint Energy receives from Enable, Enable’s ability to redeem the Enable Series A Preferred Units in certain circumstances and the value of CenterPoint Energy’s interest in Enable, and factors that may have a material impact on such performance, cash distributions and value, including factors such as:

◦ competitive conditions in the midstream industry, and actions taken by Enable’s customers and competitors, including the extent and timing of the entry of additional competition in the markets served by Enable;

◦ the timing and extent of changes in the supply of natural gas and associated commodity prices, particularly prices of natural gas and NGLs, the competitive effects of the available pipeline capacity in the regions served by Enable, and the effects of geographic and seasonal commodity price differentials, including the effects of these circumstances on re-contracting available capacity on Enable’s interstate pipelines;

◦ the demand for crude oil, natural gas, NGLs and transportation and storage services;

◦ environmental and other governmental regulations, including the availability of drilling permits and the regulation of hydraulic fracturing;

◦ recording of goodwill, long-lived asset or other than temporary impairment charges by or related to Enable;

◦ changes in tax status; and

◦ access to debt and equity capital;

• CenterPoint Energy’s expected benefits of the Merger and integration, including the outcome of shareholder litigation filed against Vectren that could reduce anticipated benefits of the Merger, as well as the ability to successfully integrate the Vectren businesses and realize anticipated benefits and the risk that the credit ratings of the combined company or its subsidiaries may be different from what CenterPoint Energy expects;

• industrial, commercial and residential growth in our service territories and changes in market demand, including the demand for our non-utility products and services and effects of energy efficiency measures and demographic patterns;

• timely and appropriate rate actions that allow recovery of costs and a reasonable return on investment, including Houston Electric’s anticipated rate case in 2019, the outcome of which may not result in expected rates or recovery of costs;

• future economic conditions in regional and national markets and their effect on sales, prices and costs;

• weather variations and other natural phenomena, including the impact of severe weather events on operations and capital;

• state and federal legislative and regulatory actions or developments affecting various aspects of our businesses (including the businesses of Enable), including, among others, energy deregulation or re-regulation, pipeline integrity and safety and changes in regulation and legislation pertaining to trade, health care, finance and actions regarding the rates charged by our regulated businesses;

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• tax legislation, including the effects of the TCJA (which includes any potential changes to interest deductibility) and uncertainties involving state commissions’ and local municipalities’ regulatory requirements and determinations regarding the treatment of EDIT and our rates;

• CenterPoint Energy’s and CERC’s ability to mitigate weather impacts through normalization or rate mechanisms, and the effectiveness of such mechanisms;

• the timing and extent of changes in commodity prices, particularly natural gas, and the effects of geographic and seasonal commodity price differentials on CERC and Enable;

• actions by credit rating agencies, including any potential downgrades to credit ratings;

• changes in interest rates and their impact on costs of borrowing and the valuation of CenterPoint Energy’s pension benefit obligation;

• problems with regulatory approval, construction, implementation of necessary technology or other issues with respect to major capital projects that result in delays or in cost overruns that cannot be recouped in rates;

• the availability and prices of raw materials and services and changes in labor for current and future construction projects;

• local, state and federal legislative and regulatory actions or developments relating to the environment, including those related to global climate change;

• the impact of unplanned facility outages;

• any direct or indirect effects on our or Enable’s facilities, operations and financial condition resulting from terrorism, cyber-attacks, data security breaches or other attempts to disrupt our businesses or the businesses of third parties, or other catastrophic events such as fires, earthquakes, explosions, leaks, floods, droughts, hurricanes, pandemic health events or other occurrences;

• our ability to invest planned capital and the timely recovery of our investments;

• our ability to control operation and maintenance costs;

• the sufficiency of our insurance coverage, including availability, cost, coverage and terms and ability to recover claims;

• the investment performance of CenterPoint Energy’s pension and postretirement benefit plans;

• commercial bank and financial market conditions, our access to capital, the cost of such capital, and the results of our financing and refinancing efforts, including availability of funds in the debt capital markets;

• changes in rates of inflation;

• inability of various counterparties to meet their obligations to us;

• non-payment for our services due to financial distress of our customers;

• the extent and effectiveness of our and Enable’s risk management and hedging activities, including, but not limited to financial and weather hedges and commodity risk management activities;

• timely and appropriate regulatory actions, which include actions allowing securitization, for any future hurricanes or natural disasters or other recovery of costs, including costs associated with Hurricane Harvey;

• CenterPoint Energy’s or Enable’s potential business strategies and strategic initiatives, including restructurings, joint ventures and acquisitions or dispositions of assets or businesses (including a reduction of CenterPoint Energy’s interest in Enable, if any, whether through its decision to sell a portion of the Enable common units it owns in the public equity markets or otherwise, subject to certain limitations), which CenterPoint Energy and Enable cannot assure will be completed or will have the anticipated benefits to CenterPoint Energy or Enable;

• acquisition and merger activities involving us or our competitors, including the ability to successfully complete merger, acquisition and divestiture plans;

• our or Enable’s ability to recruit, effectively transition and retain management and key employees and maintain good labor relations;

• the outcome of litigation;

• the ability of REPs, including REP affiliates of NRG and Vistra Energy Corp., formerly known as TCEH Corp., to satisfy their obligations to CenterPoint Energy and Houston Electric;

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• changes in technology, particularly with respect to efficient battery storage or the emergence or growth of new, developing or alternative sources of generation;

• the timing and outcome of any audits, disputes and other proceedings related to taxes;

• the effective tax rates;

• the effect of changes in and application of accounting standards and pronouncements; and

• other factors discussed in “Risk Factors” in Item 1A of this report and in other reports that the Registrants file from time to time with the SEC.

CENTERPOINT ENERGY CONSOLIDATED RESULTS OF OPERATIONS

	Year Ended December 31,
	2018			2017			2016
	(in millions, except per share amounts)
Revenues	$	10,589		$	9,614		$	7,528
Expenses	9,758			8,478			6,505
Operating Income	831			1,136			1,023
Gain (Loss) on Marketable Securities	(22		)	7			326
Gain (Loss) on Indexed Debt Securities	(232		)	49			(413		)
Interest and Other Finance Charges	(361		)	(313		)	(338		)
Interest on Securitization Bonds	(59		)	(77		)	(91		)
Equity in Earnings of Unconsolidated Affiliates	307			265			208
Other Income (Expense), net	50			(4		)	(29		)
Income Before Income Taxes	514			1,063			686
Income Tax Expense (Benefit)	146			(729		)	254
Net Income	368			1,792			432
Preferred Stock dividend requirement	35			—			—
Income Available to Common Shareholders	$	333		$	1,792		$	432
Basic Earnings Per Common Share	$	0.74		$	4.16		$	1.00
Diluted Earnings Per Common Share	$	0.74		$	4.13		$	1.00

2018 Compared to 2017

Net Income.  CenterPoint Energy reported income available to common shareholders of $333 million ($0.74 per diluted common share) for 2018 compared to $1,792 million ($4.13 per diluted common share) for 2017.

The decrease in income available to common shareholders of $1,459 million was primarily due to the following key factors:

• an $875 million increase in income tax expense, resulting from a reduction in income tax expense of $1,113 million due to tax reform in 2017, discussed further in Note 15 to the consolidated financial statements, offset by a $238 million decrease in income tax expense primarily due to a reduction in the corporate income tax rate resulting from the TCJA in 2018 and lower income before income taxes year over year;

• a $305 million decrease in operating income, discussed below by reportable segment in Results of Operations by Reportable Segment;

• a $281 million increase in losses on indexed debt securities related to the ZENS, resulting from a loss of $11 million from Meredith’s acquisition of Time in March 2018, a loss of $242 million from AT&T’s acquisition of TW in June 2018 and reduced gains of $28 million in the underlying value of the indexed debt securities;

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• a $48 million increase in interest expense primarily due to higher outstanding other long-term debt and the amortization of Bridge Facility fees of $24 million;

• a $35 million increase in preferred stock dividend requirements; and

• a $29 million increase in losses on marketable securities.

These decreases were partially offset by:

•a $42 million increase in equity earnings from the investment in Enable, discussed further in Note 11 to the consolidated financial statements;

•a $25 million increase in interest income on investments included in Other Income (Expense), net shown above;

• an $17 million decrease in the non-service cost components of net periodic pension and post-retirement costs included in Other Income (Expense), net shown above;

•an $18 million decrease in interest expense related to lower outstanding balances of the Securitization Bonds;

•a $6 million increase in miscellaneous other non-operating income included in Other Income (Expense), net shown above;

• a $4 million increase in dividend income on CenterPoint Energy’s ZENS-Related Securities included in Other Income (Expense), net shown above; and

•a $2 million increase in gains on interest rate economic hedges included in Other Income (Expense), net shown above.

Income Tax Expense. CenterPoint Energy reported an effective tax rate of 28% and (69%) for the years ended December 31, 2018 and 2017, respectively. The effective tax rate of 28% is primarily due to the reduction in the federal corporate income tax rate from 35% to 21% effective January 1, 2018 as prescribed by the TCJA and the amortization of EDIT. These decreases were partially offset by an increase to the effective tax rate as a result of the establishment of a valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. The effective tax rate was also increased for state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions.

2017 Compared to 2016

Net Income.  CenterPoint Energy reported income available to common shareholders of $1,792 million ($4.13 per diluted common share) for 2017 compared to $432 million ($1.00 per diluted common share) for 2016.

The increase in income available to common shareholders of $1,360 million was primarily due to the following key factors:

• a $983 million decrease in income tax expense, resulting from a reduction in income tax expense of $1,113 million due to tax reform, discussed further in Note 15 to the consolidated financial statements, offset by a $130 million increase in income tax expense primarily due to higher net income year over year;

• a $462 million increase in gains on indexed debt securities related to the ZENS, resulting from increased gains of $345 million in the underlying value of the indexed debt securities and a loss of $117 million from the Charter merger in 2016;

• a $113 million increase in operating income discussed below by reportable segment in Results of Operations by Reportable Segment;

• a $57 million increase in equity earnings from the investment in Enable, discussed further in Note 11 to the consolidated financial statements;

• a $25 million decrease in interest expense due to lower weighted average interest rates on outstanding debt;

• a $17 million decrease in losses on early debt redemption;

• a $14 million increase in cash distributions on the Enable Series A Preferred Units included in Other Income (Expense), net shown above; and

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• a $14 million decrease in interest expense related to lower outstanding balances of the Securitization Bonds.

These increases were partially offset by:

• a $319 million decrease in gains on marketable securities; and

•a $6 million decrease in miscellaneous other non-operating income included in Other Income (Expense), net shown above.

Income Tax Expense. CenterPoint Energy reported an effective tax rate of (69%) and 37% for the years ended December 31, 2017 and 2016, respectively. The effective tax rate of (69%) was primarily due to the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. See Note 15 to the consolidated financial statements for a more in-depth discussion of the 2017 impacts of the TCJA.

HOUSTON ELECTRIC CONSOLIDATED RESULTS OF OPERATIONS

Houston Electric’s results of operations are affected by seasonal fluctuations in the demand for electricity. Houston Electric’s results of operations are also affected by, among other things, the actions of various governmental authorities having jurisdiction over rates Houston Electric charges, debt service costs, income tax expense, Houston Electric’s ability to collect receivables from REPs and Houston Electric’s ability to recover its regulatory assets.

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues	$	3,234		$	2,998		$	3,059
Expenses	2,609			2,361			2,407
Operating Income	625			637			652
Interest and other finance charges	(138		)	(128		)	(126		)
Interest on Securitization Bonds	(59		)	(77		)	(91		)
Other expense, net	(3		)	(8		)	(10		)
Income before income taxes	425			424			425
Income tax expense (benefit)	89			(9		)	149
Net income	$	336		$	433		$	276

2018 Compared to 2017

Net Income.  Houston Electric reported net income of $336 million for 2018 compared to $433 million for 2017.

The decrease of $97 million in net income was primarily due to the following key factors:

• a $98 million increase in income tax expense, resulting from a reduction in income tax expense of $158 million due to tax reform in 2017, discussed further in Note 15 to the consolidated financial statements, offset by a $60 million decrease in income tax expense primarily due to a reduction in the corporate income tax rate resulting from the TCJA in 2018; and

• an $10 million increase in interest expense due to higher outstanding other long-term debt.

These decreases to net income were partially offset by the following:

• a $5 million decrease in non-service cost components of net periodic pension and post-retirement costs included in Other expense, net shown above; and

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• an $8 million increase in TDU operating income resulting from a $7 million increase discussed below in Results of Operations by Reportable Segment and increased usage of $1 million, primarily due to a return to more normal weather, which was not offset by the weather hedge loss recorded on CenterPoint Energy.

Income Tax Expense.  Houston Electric reported an effective tax rate of 21% and (2%) for the years ended December 31, 2018 and 2017, respectively. The effective tax rate of 21% is primarily due to the reduction in the federal corporate income tax rate from 35% to 21% effective January 1, 2018 as prescribed by the TCJA and the amortization of EDIT.

2017 Compared to 2016

Net Income.  Houston Electric reported net income of $433 million for 2017 compared to $276 million for 2016.

The increase of $157 million in net income was primarily due to the following key factors:

• a $158 million decrease in income tax expense due to a reduction in the corporate income tax rate resulting from the TCJA; and

• a $1 million increase in TDU operating income resulting from a $1 million decrease discussed below in Results of Operations by Reportable Segment, which was more than offset by increased usage of $2 million, primarily due to a return to more normal weather, which was not offset by the weather hedge loss recorded on CenterPoint Energy.

This increase in net income was partially offset by a $2 million increase in interest expense due to higher outstanding other long-term debt.

Income Tax Expense.  Houston Electric reported an effective tax rate of (2%) and 35% for the years ended December 31, 2017 and 2016, respectively. The effective tax rate of (2%) was primarily due to the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. See Note 15 to the consolidated financial statements for a more in-depth discussion of the 2017 impacts of the TCJA.

CERC CONSOLIDATED RESULTS OF OPERATIONS

CERC’s results of operations are affected by seasonal fluctuations in the demand for natural gas and price movements of energy commodities as well as natural gas basis differentials. CERC’s results of operations are also affected by, among other things, the actions of various federal, state and local governmental authorities having jurisdiction over rates CERC charges, competition in CERC’s various business operations, the effectiveness of CERC’s risk management activities, debt service costs and income tax expense.

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues	$	7,343		$	6,603		$	4,454
Expenses	7,121			6,136			4,113
Operating Income	222			467			341
Interest and other finance charges	(122		)	(123		)	(122		)
Other expense, net	(8		)	(25		)	(20		)
Income from continuing operations before income taxes	92			319			199
Income tax expense (benefit)	22			(265		)	81
Income from continuing operations	70			584			118
Income from discontinued operations, net of tax	138			161			127
Net Income	$	208		$	745		$	245

2018 Compared to 2017

Net Income.  CERC reported net income of $208 million for 2018 compared to $745 million for 2017.

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The decrease in net income of $537 million was primarily due to the following key factors:

• a $287 million increase in income tax expense, resulting from a reduction in income tax expense of $396 million due to tax reform in 2017, discussed further in Note 15 to the consolidated financial statements, offset by a $109 million decrease in income tax expense primarily due to lower income from continuing operations and a reduction in the corporate income tax rate resulting from the TCJA in 2018;

• a $245 million decrease in operating income, discussed below by reportable segment in Results of Operations by Reportable Segment; and

• a $23 million decrease in income from discontinued operations, net of tax, due to the Internal Spin discussed further in Note 11 to the consolidated financial statements.

These decreases were partially offset by:

• a $12 million decrease in the non-service cost components of net periodic pension and post-retirement costs included in Other expense, net shown above;

• a $5 million increase in miscellaneous other non-operating income included in Other expense, net shown above; and

• a $1 million decrease in interest expense due to lower outstanding long-term debt.

Income Tax Expense. CERC’s effective tax rate reported on income from continuing operations was 24% and (83%) for the years ended December 31, 2018 and 2017, respectively. The effective tax rate of 24% on income from continuing operations is primarily due to the reduction in the federal corporate income tax rate from 35% to 21% effective January 1, 2018 as prescribed by the TCJA and the amortization of EDIT.

2017 Compared to 2016

Net Income.  CERC reported net income of $745 million for 2017 compared to net income of $245 million for 2016.

The increase in net income of $500 million was primarily due to the following key factors:

• a $346 million decrease in income tax expense, resulting from a reduction in income tax expense of $396 million due to tax reform, discussed further in Note 15 to the consolidated financial statements, offset by a $50 million increase in income tax expense primarily due to higher income from continuing operations year-over-year;

• a $126 million increase in operating income discussed below in Results of Operations by Reportable Segment; and

• a $34 million increase in income from discontinued operations, net of tax, discussed further in Notes 11 and 15 to the consolidated financial statements.

These increases were partially offset by:

• a $5 million decrease in miscellaneous other non-operating income included in Other Income, net shown above; and

• a $1 million increase in interest expense due to the issuance of $300 million of unsecured senior notes and higher weighted average commercial paper interest rates discussed further in Note 14 to the consolidated financial statements.

Income Tax Expense. CERC’s effective tax rate reported on income from continuing operations was (83%) and 41% for the years ended December 31, 2017 and 2016, respectively. The effective tax rate of (83%) on income from continuing operations is primarily due to the remeasurement of CERC’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. See Note 15 to the consolidated financial statements for a more in-depth discussion of the 2017 impacts of the TCJA.

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RESULTS OF OPERATIONS BY REPORTABLE SEGMENT

As of December 31, 2018, reportable segments by Registrant are as follows:

Registrant	Electric Transmission & Distribution	Natural Gas Distribution	Energy  Services	Midstream Investments	Other Operations
CenterPoint Energy	X	X	X	X	X
Houston Electric	X
CERC		X	X		X

The following table presents operating income (loss) for each reportable segment for 2018, 2017 and 2016.  Included in revenues by reportable segment below are intersegment sales, which are accounted for as if the sales were to third parties at current market prices. These revenues are eliminated during consolidation. See Note 19 to the consolidated financial statements for details of reportable segments by registrant.

Operating Income (Loss) by Reportable Segment

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy
Electric Transmission & Distribution	$	623		$	636		$	653
Natural Gas Distribution	266			348			321
Energy Services	(47		)	126			21
Other Operations	(11		)	26			28
Total CenterPoint Energy Consolidated Operating Income	$	831		$	1,136		$	1,023
Houston Electric
Electric Transmission & Distribution (1)	$	625		$	637		$	652
CERC
Natural Gas Distribution	$	266		$	348		$	321
Energy Services	(47		)	126			21
Other Operations	3			(7		)	(1		)
Total CERC Consolidated Operating Income	$	222		$	467		$	341

(1) Excludes weather hedge gain (loss) of $(2) million, $(1) million and $1 million recorded on CenterPoint Energy. See Note 9(a) to the consolidated financial statements for more information on the weather hedge.

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Electric Transmission & Distribution (CenterPoint Energy and Houston Electric)

The following table provides summary data of the Electric Transmission & Distribution reportable segment:

	Year Ended December 31,
	2018		2017		2016
Revenues:	(in millions, except throughput and customer data)
TDU	$	2,638	$	2,588	$	2,507
Bond Companies	594		409		553
Total revenues	3,232		2,997		3,060
Expenses:
Operation and maintenance, excluding Bond Companies	1,444		1,397		1,330
Depreciation and amortization, excluding Bond Companies	386		395		384
Taxes other than income taxes	240		235		231
Bond Companies	539		334		462
Total expenses	2,609		2,361		2,407
Operating Income	$	623	$	636	$	653
Operating Income:
TDU	$	568	$	561	$	562
Bond Companies (1)	55		75		91
Total segment operating income	$	623	$	636	$	653
Throughput (in GWh):
Residential	30,405		29,703		29,586
Total	90,409		88,636		86,829
Number of metered customers at end of period:
Residential	2,198,225		2,164,073		2,129,773
Total	2,485,370		2,444,299		2,403,340

(1) Represents the amount necessary to pay interest on the Securitization Bonds.

2018 Compared to 2017.  The Electric Transmission & Distribution reportable segment reported operating income of $623 million for 2018, consisting of $568 million from the TDU and $55 million related to the Bond Companies. For 2017, operating income totaled $636 million, consisting of $561 million from the TDU and $75 million related to the Bond Companies.

TDU operating income increased$7 million primarily due to the following key factors:

• higher transmission-related revenues of $37 million, exclusive of the TCJA, and lower transmission costs billed by transmission providers of $32 million;

• customer growth of $31 million from the addition of over 41,000 customers;

• rate increases of $36 million related to distribution capital investments, exclusive of the TCJA;

• higher equity return of $32 million, primarily related to the annual true-up of transition charges correcting for under-collections that occurred during the preceding 12 months;

• higher miscellaneous revenues of $9 million largely due to right-of-way and fiber and wireless revenues; and

• higher usage of $8 million, primarily due to a return to more normal weather.

These increases to operating income were partially offset by the following:

• increased operation and maintenance expenses of $79 million, excluding transmission costs billed by transmission providers, primarily due to the following:

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◦ contract services of $24 million, largely due to increased resiliency spend and services related to fiber and wireless;

◦ support services of $23 million, primarily related to technology projects;

◦ labor and benefits costs of $14 million;

◦ other miscellaneous operation and maintenance expenses of $12 million; and

◦ damage claims from third parties of $6 million;

• lower revenues of $79 million due to the recording of a regulatory liability and a corresponding decrease to revenue of $31 million reflecting the difference in revenues collected under customer rates at the pre-TCJA tax rate and the revenues that would have been collected had rates been adjusted to the lower corporate tax rate upon TCJA enactment and lower revenues of $48 million due to lower transmission and distribution rate filings as a result of the TCJA; and

• higher depreciation and amortization expense, primarily because of ongoing additions to plant in service, and other taxes of $17 million.

Lower depreciation and amortization expenses related to AMS of $21 million were offset by a corresponding decrease in related revenues.

2017 Compared to 2016.  The Electric Transmission & Distribution reportable segment reported operating income of $636 million for 2017, consisting of $561 million from the TDU and $75 million related to the Bond Companies. For 2016, operating income totaled $653 million, consisting of $562 million from the TDU and $91 million related to the Bond Companies.

TDU operating income decreased$1 million primarily due to the following key factors:

• lower equity return of $22 million, primarily related to the annual true-up of transition charges correcting for over-collections that occurred during the preceding 12 months;

• higher depreciation, primarily because of ongoing additions to plant in service, and other taxes of $20 million;

• higher operation and maintenance expenses of $18 million, primarily due to higher labor and benefits costs of $10 million and corporate support services expenses of $8 million;

• lower usage of $15 million; and

•lower miscellaneous revenues, including right-of-way, of $10 million.

These decreases to operating income were partially offset by the following:

• rate increases of $47 million related to distribution capital investments;

•customer growth of $32 million from the addition of almost 41,000 customers; and

• higher transmission-related revenues of $61 million, partially offset by transmission costs billed by transmission providers of $56 million.

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Natural Gas Distribution (CenterPoint Energy and CERC)

The following table provides summary data of the Natural Gas Distribution reportable segment: 

	Year Ended December 31,
	2018		2017		2016
	(in millions, except throughput and customer data)
Revenues	$	2,967	$	2,639	$	2,409
Expenses:
Natural gas	1,467		1,164		1,008
Operation and maintenance	803		722		696
Depreciation and amortization	277		260		242
Taxes other than income taxes	154		145		142
Total expenses	2,701		2,291		2,088
Operating Income	$	266	$	348	$	321
Throughput (in Bcf):
Residential	186		151		152
Commercial and industrial	285		261		259
Total Throughput	471		412		411
Number of customers at end of period:
Residential	3,246,277		3,213,140		3,183,538
Commercial and industrial	260,033		256,651		255,806
Total	3,506,310		3,469,791		3,439,344

2018 Compared to 2017.  The Natural Gas Distribution reportable segment reported operating income of $266 million for 2018 compared to $348 million for 2017.

Operating income decreased$82 million primarily as a result of the following key factors:

• lower revenue of $47 million, associated with the recording of a regulatory liability and a corresponding decrease to revenue in certain jurisdictions of $14 million reflecting the difference in revenues collected under customer rates at the pre-TCJA tax rates and the revenues that would have been collected had rates been adjusted to the lower corporate tax rate upon TCJA enactment and lower filing amounts of $33 million associated with the lower corporate tax rate as a result of the TCJA;

• higher operation and maintenance expenses of $41 million, primarily consisting of:

◦ materials and supplies, contracts and services and bad debt expenses of $15 million;

◦ support services expenses of $16 million, primarily related to technology projects; and

◦ other miscellaneous operation and maintenance expenses of $10 million;

• higher labor and benefits costs of $30 million, resulting from the recording in 2017 of regulatory assets (and a corresponding reduction in expense) to recover $16 million of prior post-retirement expenses in future rates established in the Texas Gulf rate order and additional maintenance activities;

• increased depreciation and amortization expense of $17 million, primarily due to ongoing additions to plant-in-service;

• decreased revenue of $10 million, primarily driven by timing of weather normalization adjustments; and

• higher other taxes of $2 million, primarily due to higher property taxes.

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These decreases were partially offset by:

• rate increases of $46 million, primarily in the Texas, Minnesota and Arkansas jurisdictions, exclusive of the TCJA impact discussed above;

• an increase in non-volumetric revenues of $10 million; and

• a $10 million increase associated with customer growth from the addition of over 36,000 customers.

Increased operation and maintenance expense related to energy efficiency programs of $10 million and increased other taxes expense related to gross receipt taxes of $7 million were offset by a corresponding increase in the related revenues.

2017 Compared to 2016.  The Natural Gas Distribution reportable segment reported operating income of $348 million for 2017 compared to $321 million for 2016.

Operating income increased$27 million primarily as a result of the following key factors:

• rate increases of $38 million, primarily from Texas rate filings of $14 million, Arkansas rate case and formula rate plan filings of $9 million, Minnesota interim rates of $7 million and Mississippi RRA of $4 million;

• higher other revenues of $8 million, primarily driven by transportation revenues;

• customer growth of $7 million from the addition of over 30,000 new customers;

• labor and benefits were favorable by $5 million, resulting primarily from the recording of a regulatory asset (and a corresponding reduction in expense) to recover $16 million of prior postretirement expenses in future rates established in the Texas Gulf rate order; and

• an increase of $7 million from weather normalization adjustments, partially offset by $4 million of milder weather effects.

These increases were partially offset by:

• higher operation and maintenance expenses of $18 million, primarily due to increased bad debt expenses of $7 million, increased contract services of $7 million and increased insurance costs of $3 million; and

• increased depreciation and amortization expense, primarily due to ongoing additions to plant-in-service, and other taxes of $16 million.

Increased operation and maintenance expense related to energy efficiency programs of $13 million and decreased other taxes expense related to gross receipt taxes of $5 million were offset by a corresponding increase or decrease in the related revenues.

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Energy Services (CenterPoint Energy and CERC)

The following table provides summary data of the Energy Services reportable segment:

	Year Ended December 31,
	2018			2017		2016
	(in millions, except throughput and customer data)
Revenues	$	4,521		$	4,049	$	2,099
Expenses:
Natural gas	4,453			3,816		2,011
Operation and maintenance	96			86		58
Depreciation and amortization	16			19		7
Taxes other than income taxes	3			2		2
Total expenses	4,568			3,923		2,078
Operating Income (Loss)	$	(47	)	$	126	$	21
Timing impacts related to mark-to-market gain (loss) (1)	$	(110	)	$	79	$	(21	)
Throughput (in Bcf)	1,355			1,200		777
Number of customers at end of period (2)	30,000			31,000		30,000

(1) Includes the change in unrealized mark-to-market value and the impact from derivative assets and liabilities acquired through the purchase of Continuum and AEM.

(2) These numbers do not include approximately 65,000, 72,000 and 60,100 natural gas customers as of December 31, 2018, 2017 and 2016, respectively, that are under residential and small commercial choice programs invoiced by their host utility.

2018 Compared to 2017. The Energy Services reportable segment reported an operating loss of $47 million for 2018 compared to operating income of $126 million for 2017.

Operating income decreased$173 million as a result of the following key factors:

• a $189 million decrease from mark-to-market accounting for derivatives associated with certain natural gas purchases and sales used to lock in economic margins; and

• an $10 million increase in operation and maintenance expenses, attributable to increased technology expenses, higher contract and services expense related to pipeline integrity testing, higher support services and legal expenses.

These decreases were partially offset by the following:

• a $22 million increase in margin due to increased opportunities to optimize natural gas supply costs through storage and transportation capacity, primarily in the first quarter of 2018, and incremental volumes from customers. Realized commercial opportunities attributable to the Continuum and AEM acquisitions and colder than normal weather in several regions of the United States, primarily in the first quarter of 2018, drove incremental sales volumes; and

• a $5 million increase in margin due to increased revenues from energy delivery to customers through CEIP interconnect projects and MES’ portable natural gas supply services.

2017 Compared to 2016. The Energy Services reportable segment reported operating income of $126 million for 2017 compared to $21 million for 2016. The increase in operating income of $105 million was primarily due to a $100 million increase from mark-to-market accounting for derivatives associated with certain natural gas purchases and sales used to lock in economic margins. A weather-driven spike in natural gas prices at the end of 2017 caused the accrual of an unusually high mark-to-market asset, expected to be substantially reversed in the first quarter of 2018 as natural gas prices normalize. Operating income in 2017

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also included approximately $5 million of expenses related to the acquisition and integration of AEM. The remaining increase in operating income was primarily due to increased throughput related to the acquisition of AEM in 2017.

Midstream Investments (CenterPoint Energy)

The following table provides pre-tax equity income of the Midstream Investments reportable segment:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Equity earnings from Enable, net	$	307	$	265	$	208

Other Operations (CenterPoint Energy and CERC)

The following table shows the operating income (loss) of CenterPoint Energy’s Other Operations reportable segment:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues	$	15		$	14		$	15
Expenses	26			(12		)	(13		)
Operating Income (Loss)	$	(11	)	$	26		$	28

2018 Compared to 2017. CenterPoint Energy’s Other Operations reportable segment reported an operating loss of $11 million for 2018 compared to operating income of $26 million for 2017. Operating income decreased$37 million primarily due to costs related to the Merger.

2017 Compared to 2016. CenterPoint Enegy’s Other Operations reportable segment reported operating income of $26 million for 2017 compared to $28 million for 2016. Operating income decreased$2 million primarily due to increased operating expenses, partially offset by decreased depreciation and amortization.

The following table shows the operating income (loss) of CERC’s Other Operations reportable segment:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues	$	1		$	—		$	1
Expenses	(2		)	7			2
Operating Income (Loss)	$	3		$	(7	)	$	(1	)

LIQUIDITY AND CAPITAL RESOURCES

Historical Cash Flows

The net cash provided by (used in) operating, investing and financing activities for 2018, 2017 and 2016 is as follows:

	Year Ended December 31,
	2018									2017									2016
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Cash provided by (used in):
Operating activities	$	2,136		$	1,115		$	814		$	1,417		$	905		$	278		$	1,923		$	1,102		$	512
Investing activities	(1,207		)	(911		)	(697		)	(1,257		)	(776		)	(346		)	(1,034		)	(951		)	42
Financing activities	3,053			(108		)	(104		)	(245		)	(236		)	79			(808		)	(69		)	(553		)

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Operating Activities. The following items contributed to increased (decreased) net cash provided by operating activities:

	Year Ended December 31,
	2018 compared to 2017									2017 compared to 2016
	CenterPoint Energy			Houston  Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Changes in net income after adjusting for non-cash items	$	(63	)	$	154		$	(243	)	$	141		$	(22	)	$	215
Changes in working capital	604			57			595			(545		)	(189		)	(474		)
Change in equity in earnings from Enable, net of distributions (1)	225			—			—			(57		)	—			—
Changes related to discontinued operations (2)	—			—			176			—			—			—
Higher pension contribution	(21		)	—			—			(39		)	—			—
Other	(26		)	(1		)	8			(6		)	14			25
	$	719		$	210		$	536		$	(506	)	$	(197	)	$	(234	)

(1) This change is partially offset by the change in distributions from Enable in excess of cumulative earnings in investing activities noted in the table below.

(2) See Notes 2(c) and 11 to the consolidated financial statements for a discussion of CERC’s discontinued operations.

Investing Activities.The following items contributed to (increased) decreased net cash used in investing activities:

	Year Ended December 31,
	2018 compared to 2017									2017 compared to 2016
	CenterPoint Energy			Houston  Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Proceeds from the sale of marketable securities	$	398		$	—		$	—		$	(178	)	$	—		$	—
Acquisitions, net of cash acquired	132			—			132			(30		)	—			(30		)
Net change in capital expenditures	(225		)	(47		)	(120		)	(12		)	(13		)	4
Investment in Enable Series A Preferred Units	—			—			—			363			—			—
Net change in notes receivable from unconsolidated affiliates	—			(96		)	(114		)	(363		)	192			—
Change in distributions from Enable in excess of cumulative earnings	(267		)	—			—			—			—			—
Changes related to discontinued operations (1)	—			—			(250		)	—			—			(363		)
Other	12			8			1			(3		)	(4		)	1
	$	50		$	(135	)	$	(351	)	$	(223	)	$	175		$	(388	)

(1) See Notes 2(c) and 11 to the consolidated financial statements for a discussion of CERC’s discontinued operations.

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Financing Activities.The following items contributed to (increased) decreased net cash used in financing activities:

	Year Ended December 31,
	2018 compared to 2017									2017 compared to 2016
	CenterPoint Energy			Houston  Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Net changes in commercial paper outstanding	$	(1,892	)	$	—		$	(1,017	)	$	(120	)	$	—		$	(21	)
Increased proceeds from issuances of preferred stock	1,740			—			—			—			—			—
Increased proceeds from issuance of Common Stock	1,844			—			—			—			—			—
Net changes in long-term debt outstanding, excluding commercial paper	2,126			77			851			503			(123		)	73
Net changes in reacquired debt	5			—			5			17			—			(5		)
Net changes in debt issuance costs	(34		)	(1		)	(1		)	(4		)	3			(4		)
Net changes in short-term borrowings	(43		)	—			(43		)	9			—			9
Distributions to ZENS note holders	(398		)	—			—			178			—			—
Increased payment of Common Stock dividends	(38		)	—			—			(18		)	—			—
Increased payment of preferred stock dividends	(11		)	—			—			—			—			—
Net change in notes payable from affiliated companies	—			(119		)	(1,140		)	—			372			570
Contribution from parent	—			200			922			—			(374		)	(34		)
Dividend to parent	—			(29		)	241			—			(45		)	42
Other	(1		)	—			(1		)	(2		)	—			2
	$	3,298		$	128		$	(183	)	$	563		$	(167	)	$	632

Future Sources and Uses of Cash

The liquidity and capital requirements of the Registrants are affected primarily by results of operations, capital expenditures, debt service requirements, tax payments, working capital needs and various regulatory actions. Capital expenditures are expected to be used for investment in infrastructure for electric and natural gas distribution operations. These capital expenditures are anticipated to maintain reliability and safety, increase resiliency and expand our systems through value-added projects. In addition to dividend payments on CenterPoint Energy’s Series A Preferred Stock, Series B Preferred Stock and Common Stock, and in addition to interest payments on debt, the Registrants’ principal anticipated cash requirements for 2019 include the following:

	CenterPoint Energy		Houston Electric		CERC
	(in millions)
Merger consideration for Vectren acquisition (1)	$	5,982	$	—	$	—
Estimated capital expenditures (2)	2,432		979		714
Change in control debt redemption (1)	759		—		—
Scheduled principal payments on Securitization Bonds	458		458		—
Minimum contributions to pension plans and other post-retirement plans	110		10		4
Maturing Vectren senior notes	60		—		—

(1) On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. In conjunction with the consummation of the Merger, $759 million of debt at Vectren was redeemed due to the change in control. For further discussion of the Merger, see Note 4 to the consolidated financial statements.

(2) CenterPoint Energy’s estimated capital expenditures include estimated capital expenditures for Vectren and its subsidiaries as of the closing of the Merger.

The Registrants expect that anticipated 2019 cash needs will be met with borrowings under their credit facilities, proceeds from the issuance of long-term debt (including Houston Electric’s January 2019 issuance of $700 million aggregate principal

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amount of general mortgage bonds), anticipated cash flows from operations, with respect to CenterPoint Energy and CERC, proceeds from commercial paper and with respect to CenterPoint Energy, distributions from Enable. In addition, if CenterPoint Energy decides to sell Enable common units that it owns in the public equity markets or otherwise in 2019 (reducing the amount of future distributions CenterPoint Energy receives from Enable to the extent of any such sales), any net proceeds received from such sales could provide a source for CenterPoint Energy’s remaining 2019 cash needs. Discretionary financing or refinancing may result in the issuance of equity securities of CenterPoint Energy or debt securities of the Registrants in the capital markets or the arrangement of additional credit facilities or term bank loans. Issuances of equity or debt in the capital markets, funds raised in the commercial paper markets, additional credit facilities and any sales of CenterPoint Energy’s Enable common units may not, however, be available on acceptable terms.

The following table sets forth the Registrants’ actual capital expenditures by reportable segment for 2018 and estimates of the Registrants’ capital expenditures currently planned for projects for 2019 through 2023: 

	2018		2019		2020		2021		2022		2023
CenterPoint Energy	(in millions)
Electric Transmission & Distribution	$	952	$	979	$	1,028	$	1,178	$	979	$	980
Natural Gas Distribution	638		673		678		691		694		711
Energy Services	20		40		16		15		39		13
Other Operations	110		71		39		33		34		35
Vectren and its subsidiaries (1)	—		669		740		867		1,056		896
Total	$	1,720	$	2,432	$	2,501	$	2,784	$	2,802	$	2,635
Houston Electric (2)	$	952	$	979	$	1,028	$	1,178	$	979	$	980
CERC
Natural Gas Distribution	$	638	$	673	$	678	$	691	$	694	$	711
Energy Services	20		40		16		15		39		13
Other Operations	—		1		—		—		—		—
Total	$	658	$	714	$	694	$	706	$	733	$	724

(1) Vectren 2019 capital expenditures reflect capital expenditure estimates for the period February through December 2019 only.

(2) Houston Electric consists of a single reportable segment, Electric Transmission & Distribution.

The following table sets forth estimates of the Registrants’ contractual obligations as of December 31, 2018, including payments due by period but does not include any amounts for Vectren or its subsidiaries:

Contractual Obligations	Total		2019		2020-2021		2022-2023		2024 and thereafter
	(in millions)
CenterPoint Energy
Securitization Bonds	$	1,435	$	458	$	442	$	375	$	160
Other long-term debt (1)	7,798		—		1,495		1,510		4,793
Interest payments — Securitization Bonds (2)	125		46		51		24		4
Interest payments — other long-term debt (2)	4,482		350		679		541		2,912
Operating leases (3)	36		6		11		7		12
Benefit obligations (4)	—		—		—		—		—
Non-trading derivative liabilities	131		126		5		—		—
Commodity and other commitments (5)	3,058		454		773		385		1,446
Total contractual cash obligations (6)	$	17,065	$	1,440	$	3,456	$	2,842	$	9,327

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Contractual Obligations	Total		2019		2020-2021		2022-2023		2024 and thereafter
	(in millions)
Houston Electric
Securitization Bonds	$	1,435	$	458	$	442	$	375	$	160
Other long-term debt (1)	3,281		—		402		500		2,379
Interest payments — Securitization Bonds (2)	125		46		51		24		4
Interest payments — other long-term debt (2)	2,150		132		255		226		1,537
Non-trading derivative liabilities	24		24		—		—		—
Operating leases (3)	1		1		—		—		—
Benefit obligations (4)	—		—		—		—		—
Total contractual cash obligations (6)	$	7,016	$	661	$	1,150	$	1,125	$	4,080
CERC
Long-term debt	$	2,371	$	—	$	593	$	510	$	1,268
Interest payments — long-term debt (1)	1,488		111		209		153		1,015
Operating leases (3)	32		5		9		7		11
Benefit obligations (4)	—		—		—		—		—
Non-trading derivative liabilities	107		102		5		—		—
Commodity and other commitments (5)	3,058		454		773		385		1,446
Total contractual cash obligations (6)	$	7,056	$	672	$	1,589	$	1,055	$	3,740

(1) ZENS obligations are included in the 2024 and thereafter column at their contingent principal amount as of December 31, 2018 of $93 million.  These obligations are exchangeable for cash at any time at the option of the holders for 95% of the current value of the reference shares attributable to each ZENS ($540 million as of December 31, 2018), as discussed in Note 12 to the consolidated financial statements.  

(2) The Registrants calculated estimated interest payments for long-term debt as follows: for fixed-rate debt and term debt, the Registrants calculated interest based on the applicable rates and payment dates; for variable-rate debt and/or non-term debt, the Registrants used interest rates in place as of December 31, 2018. The Registrants typically expect to settle such interest payments with cash flows from operations and short-term borrowings.

(3) For a discussion of operating leases, please read Note 16(c) to the consolidated financial statements.

(4) See Note 8(g) to the consolidated financial statements for information on the Registrants’ expected contributions to pension plans and other postretirement plans in 2019.

(5) For a discussion of commodity and other commitments, please read Note 16(a) to the consolidated financial statements.

(6) This table does not include estimated future payments for expected future AROs. These payments are primarily estimated to be incurred after 2024. See Note 3(c) to the consolidated financial statements for further information.

Off-Balance Sheet Arrangements

Other than Houston Electric’s first mortgage bonds and general mortgage bonds issued as collateral for tax-exempt long-term debt of CenterPoint Energy (see Note 14 to the consolidated financial statements) and operating leases, the Registrants have no off-balance sheet arrangements.

Regulatory Matters

Brazos Valley Connection Project (CenterPoint Energy and Houston Electric)

Houston Electric completed construction on and energized the Brazos Valley Connection in March 2018, ahead of the original June 1, 2018 energization date. The final capital costs of the project reported to the PUCT in December 2018 were $281 million, which was within the estimated range of approximately $270-$310 million in the PUCT’s original order. Houston Electric applied

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for interim recovery of project costs incurred through July 31, 2018, which were not already included in rates in a filing with the PUCT in September 2018 and received approval for interim recovery in November 2018. Final approval by the PUCT of the project costs is expected to occur in Houston Electric’s next base rate case, which is anticipated to be filed in April 2019.

Bailey to Jones Creek Project (CenterPoint Energy and Houston Electric)

In April 2017, Houston Electric submitted a proposal to ERCOT requesting its endorsement of a transmission project in the greater Freeport, Texas area, which includes enhancements to two existing substations and the construction of a new 345 kV double-circuit line to be located in the counties of Brazoria, Matagorda and Wharton. On December 12, 2017, Houston Electric received approval from ERCOT. In September 2018, Houston Electric filed a certificate of convenience and necessity application with the PUCT that included capital cost estimates for the project that ranged from approximately $482-$695 million, which were higher than the initial cost estimates. The revised project cost estimates include additional costs associated with the routing of the line to mitigate environmental and other land use impacts and structure design to address soil and coastal wind conditions. The actual capital costs of the project will depend on those factors as well as other factors, including land acquisition costs, construction costs and the ultimate route approved by the PUCT. On the request of the PUCT, ERCOT intervened in the proceeding and performed a re-evaluation of the cost-effectiveness of the proposed project. Based on that re-evaluation, ERCOT’s recommended transmission option for the project remains unchanged. Houston Electric anticipates that the PUCT will issue a final decision on the certificate of convenience and necessity application in the fourth quarter of 2019.

Rate Change Applications

The Registrants are routinely involved in rate change applications before state regulatory authorities. Those applications include general rate cases, where the entire cost of service of the utility is assessed and reset. In addition, Houston Electric is periodically involved in proceedings to adjust its capital tracking mechanisms (TCOS and DCRF) and annually files to adjust its EECRF. CERC is periodically involved in proceedings to adjust its capital tracking mechanisms in Texas (GRIP), its cost of service adjustments in Arkansas, Louisiana, Mississippi and Oklahoma (FRP, RSP, RRA and PBRC, respectively), its decoupling mechanism in Minnesota, and its energy efficiency cost trackers in Arkansas, Minnesota, Mississippi and Oklahoma (EECR, CIP, EECR and EECR, respectively). The recently acquired Vectren entities are also routinely involved in rate change applications before regulatory authorities.  However, disclosures related to rate change applications for Vectren entities during 2018 have not been included in the table below. The table below reflects significant applications pending or completed during 2018 and to date in 2019 for the Registrants.

Mechanism	Annual Increase (Decrease) (1) (in millions)	Filing  Date	Effective Date	Approval Date	Additional Information
CenterPoint Energy and Houston Electric (PUCT)
TCOS	N/A	February 2018	April 2018	April 2018	Revised TCOS annual revenue application approved in November 2017 by a reduction of $41.6 million to recognize a decrease in the federal income tax rate, amortize certain EDIT balances and adjust rate base by EDIT attributable to new plant since the last rate case, all of which are related to the TCJA.
TCOS	$40.8	May 2018	July 2018	July 2018	Requested an increase of $285 million to rate base and reflects a $40.8 million annual increase in current revenues. Also reflects a one-time refund of $6.6 million in excess federal income tax collected from January to April 2018.
TCOS	2.4	September 2018	November 2018	November 2018	Requested an increase of $15.4 million to rate base and reflects a $2.4 million annual increase in current revenues.
EECRF	8.4	June 2018	March 2019	December 2018	The PUCT issued a final order in December 2018 approving recovery of 2019 EECRF of $39.5 million, including an $8.4 million performance bonus.
DCRF	30.9	April 2018	September 2018	August 2018	Unanimous settlement agreement approved by the PUCT in August 2018 results in incremental annual revenue of $30.9 million. It results in a $120.6 million annual revenue requirement effective September 1, 2018. The settlement agreement also reflects an approximately $39 million decrease resulting from the 21% federal income tax rate, a $20 million decrease to return to customers the reserve recorded recognizing this decrease in the federal income tax rate from January 25, 2018 through August 31, 2018 and a $19.2 million decrease related to the unprotected EDIT. Effective September 1, 2019, the reserve amount returned to customers ends. In December 2018, Houston Electric filed an updated DCRF tariff to adjust the interim DCRF rates to reflect the difference between the $20 million estimated tax-expense regulatory liability and the $23.4 million actual tax-expense regulatory liability recorded by Houston Electric.

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Mechanism	Annual Increase (Decrease) (1) (in millions)	Filing  Date	Effective Date	Approval Date	Additional Information
CenterPoint Energy and CERC - South Texas (Railroad Commission)
Rate Case	(1.0)	November 2017	May 2018	May 2018	Unanimous settlement agreement approved by the Railroad Commission in May 2018 that provides for a $1 million annual decrease in current revenues. The settlement agreement also reflects an approximately $2 million decrease in the federal income tax rate and amortization of certain EDIT balances and establishes a 9.8% ROE for future GRIP filings for the South Texas jurisdiction.
CenterPoint Energy and CERC - Beaumont/East Texas, Houston and Texas Coast (Railroad Commission)
GRIP	14.7	March 2018	July 2018	June 2018	Based on net change in invested capital of $70.0 million and reflects a $14.7 million annual increase in current revenues, net of an approximate $1.0 million decrease from the federal income tax rate reduction as a result of the TCJA.
Administrative 104.111	N/A	July 2018	September 2018	August 2018	Beaumont/East Texas, Houston and Texas Coast proposed to decrease base rates by $12.9 million to reflect the change in the federal income tax rate. In addition, Beaumont/East Texas proposed to decrease the GRIP charge to reflect the change in the federal income tax rate. The impact of deferred taxes is expected to be reflected in the next rate case.
CenterPoint Energy and CERC - Arkansas (APSC)
FRP	13.2	August 2018	October 2018	September 2018	Based on ROE of 9.5% as approved in the last rate case and reflects a $13.2 million annual increase in current revenues, excluding the effects of the TCJA. The annual increase is reduced from TCJA impacts by approximately $8.1 million, which include the effects of a lower federal income tax rate and amortization of EDIT balances.
CenterPoint Energy and CERC - Louisiana (LPSC)
RSP	6.1	December 2018	December 2018	February 2019	Based on ROE of 9.95% and the 21% federal income tax rate and reflects a $6.1 million annual increase in current revenues. Other impacts of the TCJA, which were calculated outside the band, reduced the annual increase by approximately $4 million. Interim rates were implemented in December 2018. Final rates were implemented February 2019 upon receipt of the LPSC’s final order. The LPSC also approved the refund of $5.6 million of other TCJA impacts over a three month period, beginning January 31, 2019.
CenterPoint Energy and CERC - Minnesota (MPUC)
Rate Case	3.9	August 2017	November 2018	July 2018	Includes a proposal to extend decoupling beyond current expiration date of June 2018. Interim rates reflecting an annual increase of $47.8 million were effective October 1, 2017. A unanimous settlement agreement was filed in March 2018, subject to MPUC approval. The settlement agreement increases base rates by $3.9 million, makes decoupling a permanent part of the tariff, incorporates the impact of the decrease in the federal income tax rate and amortization of EDIT balances (approximately $20 million) and establishes or continues tracker recovery mechanisms that account for approximately $13.3 million in the initial filing. The MPUC voted to approve the settlement and a formal order was issued on July 20, 2018.  Final rates (and the refund of interim rates that exceed final rates) were implemented beginning November 1, 2018.
Decoupling	(13.8)	September 2018	September 2018	January 2019	Represents revenue over-recovery of $21.9 million recorded for and during the period July 1, 2017 through June 30, 2018 offset by the rate and prior period adjustments totaling $8.1 million recorded in 2018.
CIP	12.5	May 2018	September 2018	September 2018	Annual reconciliation filing for program year 2017 and includes performance bonus of $12.5 million which was recorded in September 2018.
CenterPoint Energy and CERC - Mississippi (MPSC)
RRA	3.2	May 2018	November 2018	November 2018	Based on authorized ROE of 9.144% and a capital structure of 50% debt and 50% equity and reflects a $3.2 million annual increase in revenues.
CenterPoint Energy and CERC - Oklahoma (OCC)
PBRC	5.4	March 2018	October 2018	October 2018	Based on ROE of 10% and reflects a $5.4 million annual increase in revenues.  As a result of the final order, all EDIT was removed from the PBRC calculation.  Protected EDIT amortization will begin to be refunded in April 2019 via one-time annual bill credits.  Unprotected EDIT will be refunded over a five-year period via annual bill credits which began in October 2018.

(1) Represents proposed increases (decreases) when effective date and/or approval date is not yet determined. Approved rates could differ materially from proposed rates.

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Tax Reform

For the Registrants, federal income tax expense is included in the rates approved by state commissions and local municipalities and charged by those utilities to consumers. As the Registrants file general rate cases and other periodic rate adjustments, the impacts of the TCJA (including the lower tax rate and the calculation and amortization of EDIT), along with other increases and decreases in their revenue requirements, will be incorporated into the Registrants’ future rates as allowed by IRS rules. The effect of any potential return of tax savings resulting from the TCJA to consumers may differ depending on how each regulatory body requires the Registrants to return such savings. Regulatory commissions across most of the Registrants’ jurisdictions have issued accounting orders to track or record a regulatory liability for (1) the difference between revenues collected under existing rates and revenues that would have been collected had the existing rates been set using the recently approved federal income tax rates and (2) the balance of EDIT that now exists because of the reduction in federal income tax rates.

On January 25, 2018, the PUCT issued an accounting order in Project No. 47945 directing electric utilities, including Houston Electric, to record as a regulatory liability (1) the difference between revenues collected under existing rates and revenues that would have been collected had the existing rates been set using the recently approved federal income tax rates and (2) the balance of EDIT that now exists because of the reduction in federal income tax rates. On February 13, 2018, Houston Electric and other likely parties to a future rate case announced a settlement that required Houston Electric to make (i) a TCOS filing by February 20, 2018 to reflect the change in the federal income tax rate for Houston Electric’s transmission rate base through July 31, 2017 (and such filing was timely submitted), (ii) a DCRF filing in April 2018 to reflect the change in the federal income tax rate for Houston Electric’s distribution rate base through December 31, 2017 (and such filing was timely submitted) and (iii) a full rate case filing by April 30, 2019. The settlement was presented to the PUCT during its open meeting on February 15, 2018. In response to the settlement, the PUCT did not proceed with a prior proposal to require Houston Electric to file a rate case in the summer of 2018. The PUCT also amended its prior accounting order to remove the requirement that utilities include carrying costs in the new regulatory liability. Additional information related to tax reform for Houston Electric is described in the table above.

On January 12, 2018, the APSC issued an order in Docket No. 18-006-U opening an investigatory docket into the TCJA and directing utilities, including CERC, to record as a regulatory liability the current and deferred impacts of the TCJA. On July 26, 2018, the APSC issued an order in the investigatory docket requiring CERC to (1) include the reduction in tax expense due to the January 1, 2018 change in the tax rate from 35% to 21% in the utility’s FRP as a reduction to the revenue requirement; this reduction will be reflected in the utility’s historical year netting process in the 2019 FRP filing; (2) file and include all unprotected EDIT, including plant-related unprotected EDIT, in a separate rider within 30 days and refund the entire balance before December 31, 2019; (3) include protected EDIT in the FRP and amortize such amount using the ARAM method; and (4) adjust all other riders impacted by the TCJA changes and apply carrying charges calculated using the pre-tax cost of capital of 6.44% for the amounts related to the TCJA within 30 days of the July 26, 2018 order. On August 24, 2018 CERC filed Rider TCJA in Docket No. 18-050- TF. This rider returns the entire unprotected EDIT of approximately $19 million over five months from October 2018 through February 2019. The GMES Rider, which is not currently in effect, was revised to reflect the effects of the TCJA. No other riders were impacted. On September 21, 2018, the APSC approved Rider TCJA as filed, with an effective date of October 1, 2018. On December 3, 2018, CERC filed an adjustment to Rider TCJA reflecting unprotected EDIT of approximately $17 million, as compared to the originally estimated amount of $19 million. This update reflects known amounts as a result of CNP’s 2017 corporate income tax filing. On December 21, 2018, the APSC approved the updated Rider TCJA effective through February 2019.

On October 5, 2018, the LPSC Staff filed its Final Report and Recommended Proposed Rule in Docket No. R-34754, which addresses the TCJA. The proposed rule recommends that CERC (1) adjust rates prospectively to reflect the new 21% federal corporate income tax rate; (2) refund to ratepayers 100% of federal corporate income taxes collected that are in excess of the new lower applicable tax rate plus carrying cost at the utility’s WACC over a 12-month period or other period approved by the LPSC; (3) accrue carrying charges on EDIT balances at the utility’s WACC until fully amortized, except to the extent ratepayers are receiving benefits of EDIT as a reduction to rate base; (4) amortize protected EDIT over ARAM and implement through an outside- the-band reduction in rates attributable to the annual amortization; and (5) amortize unprotected EDIT over 24 months or other period approved by the LPSC and implement through an outside-the-band reduction in rates or special tax rider. The LPSC Staff presented this proposed rule to the LPSC for vote at the October 26, 2018 Business & Executive Session. The interim RSP rates, protected EDIT impacts and the reduction of corporate income tax were implemented on December 26, 2018. On January 16, 2019, the LPSC approved the TCJA impacts implemented in December and a separate TCJA rider to return the unprotected EDIT and excess funds collected over a three-month period, which began on January 31, 2019, as provided in the final order issued February 1, 2019.

On November 6, 2018, within the order approving the 2018 Mississippi RRA, the MPSC ruled that protected EDIT will be amortized over ARAM beginning with the 2019 RRA, unprotected EDIT will be amortized over a three-year period beginning December 1, 2018, and the refund due to the change in tax rate for 2018 billings prior to the 2018 RRA implementation will be a

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component of the 2019 RRA filing for the 2018 calendar year.

FERC Revised Policy Statement and NOPR (CenterPoint Energy and CERC)

On March 15, 2018, the FERC addressed treatment of federal income tax allowances in FERC-regulated pipeline rates. The FERC issued a Revised Policy Statement stating that it will no longer permit pipelines organized as MLPs to recover an income tax allowance in their cost-of-service rates. The FERC issued the Revised Policy Statement in response to a remand from the U.S. Court of Appeals for the D.C. Circuit in United Airlines v. FERC. On July 18, 2018, the FERC issued an order denying requests for rehearing of its Revised Policy Statement because it is a non-binding policy and parties will have the opportunity to address the policy as applied in future cases. On September 14, 2018, MRT, filed a Petition for Review. That case remains undecided.

On March 15, 2018, the FERC also proposed, in a NOPR, the method by which it would apply the Revised Policy Statement to FERC-jurisdictional natural gas pipeline rates, as well as account for the corporate income tax rate reduction in the TCJA. On July 18, 2018, the FERC issued a final rule requiring FERC-regulated natural gas pipelines that have cost-based rates to make a filing providing certain cost and revenue information and then either propose to reduce or support current cost-based rates, or take no further action. The final rule is currently subject to requests for rehearing. On January 16, 2019, the FERC used this filing as the basis to open an investigation into the rates of Northern Natural Gas Company. CERC is a shipper on Northern Natural Gas Company’s pipeline system.

EGT, made its required filing on October 11, 2018, in which it asserted that no rate reduction is warranted. That filing remains subject to FERC review. MRT is not required to make such a filing as it is engaged in an ongoing rate case. As part of that rate case, FERC ordered the filings to conform to its tax policy. That order is currently subject to requests for rehearing. SESH, in which Enable owns a 50% interest, made its required filing in November 2018 and a limited rate reduction filing. With regard to FERC-jurisdictional rates on Enable’s crude oil pipelines, the FERC plans to address the Revised Policy Statement and corporate tax rate reduction in its next five-year review of the oil pipeline rate index, which will occur in 2020 and become effective July 1, 2021. At this time, we cannot predict the outcome of the final rule on Enable, but it could continue to adversely impact the rates Enable is permitted to charge its customers.

Other Matters

Credit Facilities

The Registrants may draw on their respective revolving credit facilities from time to time to provide funds used for general corporate and limited liability company purposes, including to backstop CenterPoint Energy’s and CERC’s commercial paper programs. The facilities may also be utilized to obtain letters of credit. For further details related to the Registrants’ revolving credit facilities, please see Note 14 to the consolidated financial statements.

Based on the consolidated debt to capitalization covenant in the Registrants’ revolving credit facilities, the Registrants would have been permitted to utilize the full capacity of such revolving credit facilities, which aggregated approximately $4.5 billion as of December 31, 2018. As of February 12, 2019, the Registrants had the following revolving credit facilities and utilization of such facilities:

			Amount Utilized as of February 12, 2019
Registrant/Subsidiary	Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate	Termination Date
	(in millions, except weighted average interest rate)
CenterPoint Energy (1)	$	3,300	$	—	$	6	$	2,592	2.88%	March 2022
VUHI (2)	400		—		—		190		2.73%	July 2022
Vectren Capital Corp. (2)	200		37		—		—		3.63%	July 2022
Total CenterPoint Energy	3,900		37		6		2,782
Houston Electric	300		—		4		—		—	March 2022
CERC (3)	900		—		1		—		—	March 2022
Total	$	5,100	$	37	$	11	$	2,782

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(1) Pursuant to the amendment entered into in May 2018, the aggregate commitments under the CenterPoint Energy revolving credit facility increased to $3.3 billion on October 5, 2018 due to the satisfaction of certain conditions, including the termination of the Bridge Facility. For further information, see Note 4 to the consolidated financial statements.

(2) Vectren’s outstanding short-term and long-term debt on the closing date of the Merger became debt of CenterPoint Energy.

(3) Issued by CERC Corp.

Borrowings under each of the revolving credit facilities are subject to customary terms and conditions. However, there is no requirement that the borrower makes representations prior to borrowing as to the absence of material adverse changes or litigation that could be expected to have a material adverse effect. Borrowings under each of the revolving credit facilities are subject to acceleration upon the occurrence of events of default that we consider customary. The revolving credit facilities also provide for customary fees, including commitment fees, administrative agent fees, fees in respect of letters of credit and other fees. In each of the revolving credit facilities, the spread to LIBOR and the commitment fees fluctuate based on the borrower’s credit rating. The borrowers are currently in compliance with the various business and financial covenants in the three revolving credit facilities.

Long-term Debt

For detailed information about the Registrants’ debt issuances in 2018 and to date in 2019, see Note 14 to the consolidated financial statements.

Vectren Debt

As a result of the Merger, Vectren’s outstanding short-term and long-term debt on the closing date of the Merger became debt of CenterPoint Energy, which included debt of Vectren and its subsidiaries with maturities ranging from 2019 to 2055 and containing customary covenants for investment grade debt.

Securities Registered with the SEC

On January 31, 2017, the Registrants filed a joint shelf registration statement with the SEC, as amended on September 24, 2018, registering indeterminate principal amounts of Houston Electric’s general mortgage bonds, CERC Corp.’s senior debt securities and CenterPoint Energy’s senior debt securities and junior subordinated debt securities and an indeterminate number of shares of Common Stock, shares of preferred stock, depositary shares, as well as stock purchase contracts and equity units. The joint shelf registration statement will expire on January 31, 2020. For information related to the Registrants’ debt and equity security issuances in 2018 and to date in 2019, see Notes 13 and 14 to the consolidated financial statements.

Temporary Investments

As of February 12, 2019, the Registrants had no temporary investments.

Money Pool

The Registrants participate in a money pool through which they and certain of their subsidiaries can borrow or invest on a short-term basis. CNP Midstream cannot borrow from the money pool but can invest in it. Funding needs are aggregated and external borrowing or investing is based on the net cash position. The net funding requirements of the money pool are expected to be met with borrowings under CenterPoint Energy’s revolving credit facility or the sale of CenterPoint Energy’s commercial paper. The money pool may not provide sufficient funds to meet the Registrants’ cash needs.

The table below summarizes money pool activity by participant as of February 12, 2019:

	Weighted Average Interest Rate	Houston Electric		CERC		CNP Midstream
		(in millions)
Money pool investments	2.92%	$	485	$	27	$	293

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Impact on Liquidity of a Downgrade in Credit Ratings

The interest on borrowings under the Registrants’ credit facilities is based on their credit ratings. On January 28, 2019, in anticipation of the closing of the Merger, Moody’s downgraded CenterPoint Energy’s senior unsecured debt rating to Baa2 from Baa1 and changed the rating outlook for CenterPoint Energy to stable from negative. On February 1, 2019, as a result of the closing of the Merger, S&P lowered its issuer credit rating on CenterPoint Energy’s senior unsecured debt to BBB from BBB+. S&P also lowered its issuer credit ratings on Houston Electric and CERC Corp. to BBB+ from A- in each case, affirmed the A credit rating on Houston Electric’s senior secured debt and lowered the credit rating on CERC’s senior unsecured debt to BBB+ from A-.  Additionally, S&P removed the issuer credit ratings for each Registrant from CreditWatch and changed the rating outlooks to stable. As of February 12, 2019, Moody’s, S&P and Fitch had assigned the following credit ratings to senior debt of the Registrants:

	Moody’s		S&P		Fitch
Registrant/Instrument	Rating	Outlook (1)	Rating	Outlook (2)	Rating	Outlook (3)
CenterPoint Energy Senior Unsecured Debt	Baa2	Stable	BBB	Stable	BBB	Stable
Houston Electric Senior Secured Debt	A1	Stable	A	Stable	A+	Stable
CERC Senior Unsecured Debt (4)	Baa1	Positive	BBB+	Stable	BBB+	Stable

(1) A Moody’s rating outlook is an opinion regarding the likely direction of an issuer’s rating over the medium term.

(2) An S&P outlook assesses the potential direction of a long-term credit rating over the intermediate to longer term.

(3) A Fitch rating outlook indicates the direction a rating is likely to move over a one- to two-year period.

(4) Issued by CERC Corp.

As of February 12, 2019, Moody’s and S&P had assigned the following credit ratings to CenterPoint Energy’s Vectren entities:

	Moody’s		S&P
Company/Instrument	Rating	Outlook (1)	Rating	Outlook (2)
Vectren Corp. Issuer Rating	n/a	n/a	BBB+	Stable
VUHI Senior Unsecured Debt	A2	Negative	BBB+	Stable
Indiana Gas Senior Unsecured Debt	A2	Negative	BBB+	Stable
SIGECO Senior Secured Debt	Aa3	Negative	A	Stable

(1) A Moody’s rating outlook is an opinion regarding the likely direction of an issuer’s rating over the medium term.

(2) An S&P outlook assesses the potential direction of a long-term credit rating over the intermediate to longer term.

The Registrants cannot assure that the ratings set forth above will remain in effect for any given period of time or that one or more of these ratings will not be lowered or withdrawn entirely by a rating agency. The Registrants note that these credit ratings are included for informational purposes and are not recommendations to buy, sell or hold the Registrants’ securities and may be revised or withdrawn at any time by the rating agency. Each rating should be evaluated independently of any other rating. Any future reduction or withdrawal of one or more of the Registrants’ credit ratings could have a material adverse impact on the Registrants’ ability to obtain short- and long-term financing, the cost of such financings and the execution of the Registrants’ commercial strategies.

A decline in credit ratings could increase borrowing costs and other fees under the Registrants’ revolving credit facilities. As a result of the January 28, 2019 and February 1, 2019 credit ratings downgrade of CenterPoint Energy at Moody’s and S&P, respectively, commitment fees on undrawn balances under CenterPoint Energy’s revolving credit facility of $3.3 billion as of December 31, 2018 are expected to increase by approximately $2 million annually.  Additionally, as a result of the February 1, 2019 credit rating downgrades of CERC at S&P, commitment fees on undrawn balances under CERC’s revolving credit facility of $0.9 billion as of December 31, 2018 are expected to increase by less than $1 million annually.  If the Registrants’ credit ratings had been further downgraded one notch by each of Moody’s and S&P from the ratings that existed immediately after February 1, 2019, the impact on the borrowing costs under the respective revolving credit facilities would not have been material.

CES, a wholly-owned subsidiary of CERC Corp. operating in the Energy Services reportable segment, provides natural gas sales and services primarily to commercial and industrial customers and electric and natural gas utilities throughout the United

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States. To economically hedge its exposure to natural gas prices, CES uses derivatives with provisions standard for the industry, including those pertaining to credit thresholds. Typically, the credit threshold negotiated with each counterparty defines the amount of unsecured credit that such counterparty will extend to CES. To the extent that the credit exposure that a counterparty has to CES at a particular time does not exceed that credit threshold, CES is not obligated to provide collateral. Mark-to-market exposure in excess of the credit threshold is routinely collateralized by CES. Similarly, mark-to-market exposure offsetting and exceeding the credit threshold may cause the counterparty to provide collateral to CES. As of December 31, 2018, the amount posted by CES as collateral aggregated approximately $36 million. Should the credit ratings of CERC Corp. (as the credit support provider for CES) fall below certain levels, CES would be required to provide additional collateral up to the amount of its previously unsecured credit limit. CenterPoint Energy and CERC estimate that as of December 31, 2018, unsecured credit limits extended to CES by counterparties aggregated $268 million, and none of such amount was utilized.

Pipeline tariffs and contracts typically provide that if the credit ratings of a shipper or the shipper’s guarantor drop below a threshold level, which is generally investment grade ratings from both Moody’s and S&P, cash or other collateral may be demanded from the shipper in an amount equal to the sum of three months’ charges for pipeline services plus the unrecouped cost of any lateral built for such shipper. If the credit ratings of CERC Corp. decline below the applicable threshold levels, CERC Corp. might need to provide cash or other collateral of as much as $186 million as of December 31, 2018. The amount of collateral will depend on seasonal variations in transportation levels.

ZENS and Securities Related to ZENS (CenterPoint Energy)

If CenterPoint Energy’s creditworthiness were to drop such that ZENS holders thought its liquidity was adversely affected or the market for the ZENS were to become illiquid, some ZENS holders might decide to exchange their ZENS for cash. Funds for the payment of cash upon exchange could be obtained from the sale of the shares of ZENS-Related Securities that CenterPoint Energy owns or from other sources. CenterPoint Energy owns shares of ZENS-Related Securities equal to approximately 100% of the reference shares used to calculate its obligation to the holders of the ZENS. ZENS exchanges result in a cash outflow because tax deferrals related to the ZENS and shares of ZENS-Related Securities would typically cease when ZENS are exchanged or otherwise retired and shares of ZENS-Related Securities are sold. The ultimate tax liability related to the ZENS continues to increase by the amount of the tax benefit realized each year, and there could be a significant cash outflow when the taxes are paid as a result of the retirement or exchange of the ZENS. If all ZENS had been exchanged for cash on December 31, 2018, deferred taxes of approximately $438 million would have been payable in 2018. If all the shares of ZENS-Related Securities had been sold on December 31, 2018, capital gains taxes of approximately $90 million would have been payable in 2018 based on 2018 tax rates in effect. For additional information about ZENS, see Note 12 to the consolidated financial statements.

Cross Defaults

Under CenterPoint Energy’s revolving credit facility, a payment default on, or a non-payment default that permits acceleration of, any indebtedness for borrowed money and certain other specified types of obligations (including guarantees) exceeding $125 million by it or any of its significant subsidiaries will cause a default. A default by CenterPoint Energy would not trigger a default under its subsidiaries’ debt instruments or revolving credit facilities.

Possible Acquisitions, Divestitures and Joint Ventures

From time to time, the Registrants consider the acquisition or the disposition of assets or businesses or possible joint ventures, strategic initiatives or other joint ownership arrangements with respect to assets or businesses. Any determination to take action in this regard will be based on market conditions and opportunities existing at the time, and accordingly, the timing, size or success of any efforts and the associated potential capital commitments are unpredictable. The Registrants may seek to fund all or part of any such efforts with proceeds from debt and/or equity issuances. Debt or equity financing may not, however, be available to the Registrants at that time due to a variety of events, including, among others, maintenance of their credit ratings, industry conditions, general economic conditions, market conditions and market perceptions.

Additionally, CenterPoint Energy may also reduce its ownership in Enable over time through sales in the public equity markets, or otherwise, of the Enable common units it holds, subject to market conditions. CenterPoint Energy’s ability to execute any sale of Enable common units is subject to a number of uncertainties, including the timing, pricing and terms of any such sale. Any sales of Enable common units CenterPoint Energy owns could have an adverse impact on the price of Enable common units or on any trading market for Enable common units. Further, CenterPoint Energy’s sales of Enable common units may have an adverse impact on Enable’s ability to issue equity on satisfactory terms, or at all, which may limit its ability to expand operations or make future acquisitions. Any reduction in CenterPoint Energy’s interest in Enable would result in decreased distributions from Enable and decrease income, which may adversely impact its ability to meet its payment obligations and pay dividends on its Common

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Stock. Further, any sales of Enable common units would result in a significant amount of taxes due. There can be no assurances that any sale of Enable common units in the public equity markets or otherwise will be completed. Any sale of Enable common units in the public equity markets or otherwise may involve significant costs and expenses, including, in connection with any public offering, a significant underwriting discount. CenterPoint Energy may not realize any or all of the anticipated strategic, financial, operational or other benefits from any completed sale or reduction in its investment in Enable.

Enable Midstream Partners (CenterPoint Energy and CERC)

In September 2018, CERC completed the Internal Spin, after which CERC’s equity investment in Enable met the criteria for discontinued operations classification. As a result, the operations have been classified as Income from discontinued operations, net of tax, in CERC’s Statements of Consolidated Income for the periods presented. For further information, see Note 11 to the consolidated financial statements.

CenterPoint Energy receives quarterly cash distributions from Enable on its common units and Enable Series A Preferred Units. A reduction in the cash distributions CenterPoint Energy receives from Enable could significantly impact CenterPoint Energy’s liquidity. For additional information about cash distributions from Enable, see Notes 11 and 22 to the consolidated financial statements.

Hedging of Interest Expense for Future Debt Issuances

From time to time, the Registrants may enter into forward interest rate agreements to hedge, in part, volatility in the U.S. treasury rates by reducing variability in cash flows related to interest payments. For further information, see Note 9(a) to the consolidated financial statements.

Weather Hedge (CenterPoint Energy and CERC)

CenterPoint Energy and CERC have historically entered into partial weather hedges for certain NGD jurisdictions and electric operations’ service territory to mitigate the impact of fluctuations from normal weather. CenterPoint Energy and CERC remain exposed to some weather risk as a result of the partial hedges. For more information about weather hedges, see Note 9(a) to the consolidated financial statements.

Collection of Receivables from REPs (CenterPoint Energy and Houston Electric)

Houston Electric’s receivables from the distribution of electricity are collected from REPs that supply the electricity Houston Electric distributes to their customers. Before conducting business, a REP must register with the PUCT and must meet certain financial qualifications. Nevertheless, adverse economic conditions, structural problems in the market served by ERCOT or financial difficulties of one or more REPs could impair the ability of these REPs to pay for Houston Electric’s services or could cause them to delay such payments. Houston Electric depend on these REPs to remit payments on a timely basis, and any delay or default in payment by REPs could adversely affect Houston Electric’s cash flows. In the event of a REP’s default, Houston Electric’s tariff provides a number of remedies, including the option for Houston Electric to request that the PUCT suspend or revoke the certification of the REP. Applicable regulatory provisions require that customers be shifted to another REP or a provider of last resort if a REP cannot make timely payments. However, Houston Electric remain at risk for payments related to services provided prior to the shift to the replacement REP or the provider of last resort. If a REP were unable to meet its obligations, it could consider, among various options, restructuring under the bankruptcy laws, in which event such REP might seek to avoid honoring its obligations and claims might be made against Houston Electric involving payments it had received from such REP. If a REP were to file for bankruptcy, Houston Electric may not be successful in recovering accrued receivables owed by such REP that are unpaid as of the date the REP filed for bankruptcy. However, PUCT regulations authorize utilities, such as Houston Electric, to defer bad debts resulting from defaults by REPs for recovery in future rate cases, subject to a review of reasonableness and necessity.

Other Factors that Could Affect Cash Requirements

In addition to the above factors, the Registrants’ liquidity and capital resources could be affected by:

• cash collateral requirements that could exist in connection with certain contracts, including weather hedging arrangements, and natural gas purchases, natural gas price and natural gas storage activities of CenterPoint Energy’s and CERC’s Natural Gas Distribution and Energy Services reportable segments; 

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• acceleration of payment dates on certain gas supply contracts, under certain circumstances, as a result of increased natural gas prices and concentration of natural gas suppliers (CenterPoint Energy and CERC); 

• increased costs related to the acquisition of natural gas (CenterPoint Energy and CERC); 

• increases in interest expense in connection with debt refinancings and borrowings under credit facilities; 

• various legislative or regulatory actions; 

• incremental collateral, if any, that may be required due to regulation of derivatives (CenterPoint Energy and CERC); 

• the ability of REPs, including REP affiliates of NRG and Vistra Energy Corp., formerly known as TCEH Corp., to satisfy their obligations to CenterPoint Energy and Houston Electric;

• slower customer payments and increased write-offs of receivables due to higher natural gas prices or changing economic conditions (CenterPoint Energy and CERC); 

• the outcome of litigation; 

• contributions to pension and postretirement benefit plans (CenterPoint Energy); 

• restoration costs and revenue losses resulting from future natural disasters such as hurricanes and the timing of recovery of such restoration costs; and

• various other risks identified in “Risk Factors” in Item 1A of Part I of this report.

Certain Contractual Limits on Our Ability to Issue Securities and Borrow Money

Houston Electric has contractually agreed that it will not issue additional first mortgage bonds, subject to certain exceptions. For information about the total debt to capitalization financial covenants in the Registrants’ revolving credit facilities, see Note 14 to the consolidated financial statements.

CRITICAL ACCOUNTING POLICIES

A critical accounting policy is one that is both important to the presentation of the Registrants’ financial condition and results of operations and requires management to make difficult, subjective or complex accounting estimates. An accounting estimate is an approximation made by management of a financial statement element, item or account in the financial statements. Accounting estimates in the Registrants’ historical consolidated financial statements measure the effects of past business transactions or events, or the present status of an asset or liability. The accounting estimates described below require the Registrants to make assumptions about matters that are highly uncertain at the time the estimate is made. Additionally, different estimates that the Registrants could have used or changes in an accounting estimate that are reasonably likely to occur could have a material impact on the presentation of their financial condition, results of operations or cash flows. The circumstances that make these judgments difficult, subjective and/or complex have to do with the need to make estimates about the effect of matters that are inherently uncertain. Estimates and assumptions about future events and their effects cannot be predicted with certainty. The Registrants base their estimates on historical experience and on various other assumptions that they believe to be reasonable under the circumstances, the results of which form the basis for making judgments. These estimates may change as new events occur, as more experience is acquired, as additional information is obtained and as the Registrants’ operating environment changes. The Registrants’ significant accounting policies are discussed in Note 2 to the consolidated financial statements. The Registrants believe the following accounting policies involve the application of critical accounting estimates. Accordingly, these accounting estimates have been reviewed and discussed with the Audit Committee of CenterPoint Energy’s Board of Directors.

Accounting for Rate Regulation

Accounting guidance for regulated operations provides that rate-regulated entities account for and report assets and liabilities consistent with the recovery of those incurred costs in rates if the rates established are designed to recover the costs of providing the regulated service and if the competitive environment makes it probable that such rates can be charged and collected. CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution reportable segment and CenterPoint Energy’s and CERC’s Natural Gas Distribution reportable segment apply this accounting guidance. Certain expenses and revenues subject to utility

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regulation or rate determination normally reflected in income are deferred on the balance sheet as regulatory assets or liabilities and are recognized in income as the related amounts are included in service rates and recovered from or refunded to customers.  Regulatory assets and liabilities are recorded when it is probable that these items will be recovered or reflected in future rates.  Determining probability requires significant judgment on the part of management and includes, but is not limited to, consideration of testimony presented in regulatory hearings, proposed regulatory decisions, final regulatory orders and the strength or status of applications for rehearing or state court appeals.  If events were to occur that would make the recovery of these assets and liabilities no longer probable, the Registrants would be required to write off or write down these regulatory assets and liabilities.  For further detail on the Registrants’ regulatory assets and liabilities, see Note 7 to the consolidated financial statements.

Impairment of Long-Lived Assets, Including Identifiable Intangibles, Goodwill, Equity Method Investments, and Investments without a Readily Determinable Fair Value

The Registrants review the carrying value of long-lived assets, including identifiable intangibles, goodwill, equity method investments, and investments without a readily determinable fair value whenever events or changes in circumstances indicate that such carrying values may not be recoverable, and at least annually for goodwill as required by accounting guidance for goodwill and other intangible assets.  Unforeseen events and changes in market conditions could have a material effect on the value of long-lived assets, including intangibles, goodwill, equity method investments, and investments without a readily determinable fair value due to changes in observable or estimated marked value, estimates of future cash flows, interest rate and regulatory matters and could result in an impairment charge. A loss in value of an equity method investment is recognized when the decline is deemed to be other than temporary. The Registrants recorded no impairments to goodwill, long-lived assets, including intangibles, equity method investment, or readily determinable fair value during 2018, 2017 and 2016.

CenterPoint Energy and CERC performed the annual goodwill impairment test in the third quarter of 2018 and determined, based primarily on the income approach, that no goodwill impairment charge was required for any reporting unit, which approximate the Registrants’ applicable reportable segments.

Fair value is the amount at which the asset could be bought or sold in a current transaction between willing parties and may be estimated using a number of techniques, including quoted market prices or valuations by third parties, present value techniques based on estimates of cash flows, or multiples of earnings or revenue performance measures. The fair value of the asset could be different using different estimates and assumptions in these valuation techniques.

The determination of fair value requires significant assumptions by management which are subjective and forward-looking in nature. To assist in making these assumptions, CenterPoint Energy and CERC utilized a third-party valuation specialist in both determining and testing key assumptions used in the valuation of each of the reporting units. CenterPoint Energy and CERC based their assumptions on projected financial information that they believe is reasonable; however, actual results may differ materially from those projections. These projected cash flows factor in planned growth initiatives, and for CenterPoint Energy’s and CERC’s Natural Gas Distribution reporting unit, the regulatory environment. The fair values of CenterPoint Energy’s and CERC’s Natural Gas Distribution and Energy Services reporting units significantly exceeded the carrying values.

Although there was not a goodwill asset impairment in the 2018 annual test, an interim impairment test could be triggered by the following: actual earnings results that are materially lower than expected, significant adverse changes in the operating environment, an increase in the discount rate, changes in other key assumptions which require judgment and are forward looking in nature, or if CenterPoint Energy’s market capitalization falls below book value for an extended period of time. No impairment triggers were identified subsequent to the 2018 annual test.

Unbilled Energy Revenues

Revenues related to electricity delivery and natural gas sales and services are generally recognized upon delivery to customers. However, the determination of deliveries to individual customers is based on the reading of their meters, which is performed on a systematic basis throughout the month either electronically through AMS meter communications or manual readings. At the end of each month, deliveries to non-AMS customers since the date of the last meter reading are estimated and the corresponding unbilled revenue is estimated. Information regarding deliveries to AMS customers after the last billing is obtained from actual AMS meter usage data. Unbilled electricity delivery revenue is estimated each month based on actual AMS meter data, daily supply volumes and applicable rates. Unbilled natural gas sales are estimated based on estimated purchased gas volumes, estimated lost and unaccounted for gas and tariffed rates in effect. As additional information becomes available, or actual amounts are determinable, the recorded estimates are revised. Consequently, operating results can be affected by revisions to prior accounting estimates.

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Pension and Other Retirement Plans

CenterPoint Energy sponsors pension and other retirement plans in various forms covering all employees who meet eligibility requirements. CenterPoint Energy uses several statistical and other factors that attempt to anticipate future events in calculating the expense and liability related to its plans. These factors include assumptions about the discount rate, expected return on plan assets and rate of future compensation increases as estimated by management, within certain guidelines. In addition, CenterPoint Energy’s actuarial consultants use subjective factors such as withdrawal and mortality rates. The actuarial assumptions used may differ materially from actual results due to changing market and economic conditions, higher or lower withdrawal rates or longer or shorter life spans of participants. These differences may result in a significant impact to the amount of pension expense recorded. Please read “— Other Significant Matters — Pension Plans” for further discussion.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 2(r) to the consolidated financial statements, incorporated herein by reference, for a discussion of new accounting pronouncements that affect the Registrants.

OTHER SIGNIFICANT MATTERS

Pension Plans (CenterPoint Energy).  As discussed in Note 8(b) to the consolidated financial statements, CenterPoint Energy maintains a non-contributory qualified defined benefit pension plan covering substantially all employees. Employer contributions for the qualified plan are based on actuarial computations that establish the minimum contribution required under ERISA and the maximum deductible contribution for income tax purposes.

Under the terms of CenterPoint Energy’s pension plan, it reserves the right to change, modify or terminate the plan. CenterPoint Energy’s funding policy is to review amounts annually and contribute an amount at least equal to the minimum contribution required under ERISA.

Additionally, CenterPoint Energy maintains an unfunded non-qualified benefit restoration plan that allows participants to receive the benefits to which they would have been entitled under the non-contributory qualified pension plan except for the federally mandated limits on qualified plan benefits or on the level of compensation on which qualified plan benefits may be calculated.

	Year Ended December 31,
	2018		2017		2016
CenterPoint Energy	(in millions)
Minimum funding requirements for qualified pension plan	$	60	$	39	$	—
Employer contributions to the qualified pension plan	60		39		—
Employer contributions to the non-qualified benefit restoration plan	9		9		9

CenterPoint Energy expects to contribute a minimum of approximately $86 million to the qualified pension plan and contributions aggregating approximately $7 million to the non-qualified benefit restoration plan in 2019.

Changes in pension obligations and assets may not be immediately recognized as pension expense in CenterPoint Energy’s Statements of Consolidated Income, but generally are recognized in future years over the remaining average service period of plan participants. As such, significant portions of pension expense recorded in any period may not reflect the actual level of benefit payments provided to plan participants.

As the sponsor of a plan, CenterPoint Energy is required to (a) recognize on its Consolidated Balance Sheet as an asset a plan’s over-funded status or as a liability such plan’s under-funded status, (b) measure a plan’s assets and obligations as of the end of the fiscal year and (c) recognize changes in the funded status of the plans in the year that changes occur through adjustments to other comprehensive income and, when related to its rate-regulated utilities with recovery mechanisms, to regulatory assets.

The projected benefit obligation for all defined benefit pension plans was $2,013 million and $2,225 million as of December 31, 2018 and 2017, respectively.

As of December 31, 2018, the projected benefit obligation exceeded the market value of plan assets of CenterPoint Energy’s pension plans by $497 million. Changes in interest rates or the market values of the securities held by the plan during 2019 could materially, positively or negatively, change the funded status and affect the level of pension expense and required contributions.

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Houston Electric and CERC participate in CenterPoint Energy’s qualified and non-qualified pension plans covering substantially all employees. Pension cost and the impact to pre-tax earnings, after capitalization and regulatory impacts, by Registrant were as follows:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Pension cost	$	61	$	25	$	22	$	95	$	42	$	35	$	102	$	45	$	37
Impact to pre-tax earnings	64		27		23		71		23		29		67		20		28

The calculation of pension cost and related liabilities requires the use of assumptions. Changes in these assumptions can result in different expense and liability amounts, and future actual experience can differ from the assumptions. Two of the most critical assumptions are the expected long-term rate of return on plan assets and the assumed discount rate.

As of December 31, 2018, CenterPoint Energy’s qualified pension plan had an expected long-term rate of return on plan assets of 6.00%, which is unchanged from the rate assumed as of December 31, 2017. The expected rate of return assumption was developed using the targeted asset allocation of our plans and the expected return for each asset class. CenterPoint Energy regularly reviews its actual asset allocation and periodically rebalances plan assets to reduce volatility and better match plan assets and liabilities.

As of December 31, 2018, the projected benefit obligation was calculated assuming a discount rate of 4.35%, which is 0.70% higher than the 3.65% discount rate assumed as of December 31, 2017. The discount rate was determined by reviewing yields on high-quality bonds that receive one of the two highest ratings given by a recognized rating agency and the expected duration of pension obligations specific to the characteristics of CenterPoint Energy’s plan.

CenterPoint Energy’s actuarially determined pension and other postemployment expense for 2018 and 2017 that is greater or less than the amounts being recovered through rates in certain jurisdictions is deferred as a regulatory asset or liability, respectively.  Pension cost for 2019, including the benefit restoration plan, is estimated to be $93 million, of which CenterPoint Energy expects approximately $70 million to impact pre-tax earnings after effecting such deferrals and capitalization, based on an expected return on plan assets of 6.00% and a discount rate of 4.35% as of December 31, 2018. If the expected return assumption were lowered by 0.50% from 6.00% to 5.50%, 2019 pension cost would increase by approximately $7 million.

As of December 31, 2018, the pension plan projected benefit obligation, including the unfunded benefit restoration plan, exceeded plan assets by $497 million.  If the discount rate were lowered by 0.50% from 4.35% to 3.85%, the assumption change would increase CenterPoint Energy’s projected benefit obligation by approximately $98 million and decrease its 2019 pension cost by approximately $2 million. The expected reduction in pension cost due to the decrease in discount rate is a result of the expected correlation between the reduced interest rate and appreciation of fixed income assets in pension plans with significantly more fixed income instruments than equity instruments. In addition, the assumption change would impact CenterPoint Energy’s Consolidated Balance Sheets by increasing the regulatory asset recorded as of December 31, 2018 by $84 million and would result in a charge to comprehensive income in 2018 of $11 million, net of tax of $3 million, due to the increase in the projected benefit obligation.

Future changes in plan asset returns, assumed discount rates and various other factors related to the pension plans will impact CenterPoint Energy’s future pension expense and liabilities. CenterPoint Energy cannot predict with certainty what these factors will be in the future.

Item 7A.     Quantitative and Qualitative Disclosures About Market Risk

Impact of Changes in Interest Rates, Equity Prices and Energy Commodity Prices

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business and are inherent in the Registrants’ consolidated financial statements. Most of the revenues and income from the Registrants’ business activities are affected by market risks. Categories of market risk include exposure to commodity prices through non-trading activities, interest rates and equity prices. A description of each market risk is set forth below:

• Interest rate risk primarily results from exposures to changes in the level of borrowings and changes in interest rates.

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• Equity price risk results from exposures to changes in prices of individual equity securities (CenterPoint Energy).

• Commodity price risk results from exposures to changes in spot prices, forward prices and price volatilities of commodities, such as natural gas, NGLs and other energy commodities (CenterPoint Energy and CERC).

Management has established comprehensive risk management policies to monitor and manage these market risks.

Interest Rate Risk

As of December 31, 2018, the Registrants had outstanding long-term debt and lease obligations and CenterPoint Energy had obligations under its ZENS that subject them to the risk of loss associated with movements in market interest rates.

CenterPoint Energy’s floating rate obligations aggregated $210 million and $1.8 billion as of December 31, 2018 and 2017, respectively. If the floating interest rates were to increase by 10% from December 31, 2018 rates, CenterPoint Energy’s combined interest expense would increase by approximately $1 million annually.

Houston Electric did not have any floating rate obligations as of either December 31, 2018 or 2017.

CERC’s floating rate obligations aggregated $210 million and $1.5 billion at December 31, 2018 and 2017, respectively. If the floating interest rates were to increase by 10% from December 31, 2018 rates, CERC’s combined interest expense would increase by approximately $1 million annually.

As of December 31, 2018 and 2017, CenterPoint Energy had outstanding fixed-rate debt (excluding indexed debt securities) aggregating $9.0 billion and $7.0 billion, respectively, in principal amount and having a fair value of $9.2 billion and $7.5 billion, respectively. Because these instruments are fixed-rate, they do not expose CenterPoint Energy to the risk of loss in earnings due to changes in market interest rates. However, the fair value of these instruments would increase by approximately $286 million if interest rates were to decline by 10% from their levels as of December 31, 2018.

As of December 31, 2018 and 2017, Houston Electric had outstanding fixed-rate debt aggregating $4.8 billion and $4.8 billion, respectively, in principal amount and having a fair value of approximately $4.8 billion and $5.1 billion, respectively. Because these instruments are fixed-rate, they do not expose Houston Electric to the risk of loss in earnings due to changes in market interest rates. However, the fair value of these instruments would increase by approximately $158 million if interest rates were to decline by 10% from their levels as of December 31, 2018.

As of December 31, 2018 and 2017, CERC had outstanding fixed-rate debt aggregating $2.2 billion and $1.6 billion, respectively, in principal amount and having a fair value of $2.3 billion and $1.8 billion, respectively. Because these instruments are fixed-rate, they do not expose CERC to the risk of loss in earnings due to changes in market interest rates. However, the fair value of these instruments would increase by approximately $89 million if interest rates were to decline by 10% from their levels at December 31, 2018.

In general, such an increase in fair value would impact earnings and cash flows only if the Registrants were to reacquire all or a portion of these instruments in the open market prior to their maturity.

As discussed in Note 12 to the consolidated financial statements, the ZENS obligation is bifurcated into a debt component and a derivative component. The debt component of $24 million at December 31, 2018 was a fixed-rate obligation and, therefore, did not expose CenterPoint Energy to the risk of loss in earnings due to changes in market interest rates. However, the fair value of the debt component would increase by approximately $3 million if interest rates were to decline by 10% from levels at December 31, 2018. Changes in the fair value of the derivative component, a $601 million recorded liability at December 31, 2018, are recorded in CenterPoint Energy’s Statements of Consolidated Income and, therefore, it is exposed to changes in the fair value of the derivative component as a result of changes in the underlying risk-free interest rate. If the risk-free interest rate were to increase by 10% from December 31, 2018 levels, the fair value of the derivative component liability would decrease by approximately $2 million, which would be recorded as an unrealized gain in CenterPoint Energy’s Statements of Consolidated Income.

Equity Market Value Risk (CenterPoint Energy)

CenterPoint Energy is exposed to equity market value risk through its ownership of 10.2 million shares of AT&T Common and 0.9 million shares of Charter Common, which CenterPoint Energy holds to facilitate its ability to meet its obligations under the ZENS. See Note 12 to the consolidated financial statements for a discussion of CenterPoint Energy’s ZENS obligation. Changes

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in the fair value of the ZENS-Related Securities held by CenterPoint Energy are expected to substantially offset changes in the fair value of the derivative component of the ZENS. A decrease of 10% from the December 31, 2018 aggregate market value of these shares would result in a net loss of less than $1 million, which would be recorded as an unrealized loss in CenterPoint Energy’s Statements of Consolidated Income.

Commodity Price Risk From Non-Trading Activities (CenterPoint Energy and CERC)

CenterPoint Energy and CERC use derivative instruments as economic hedges to offset the commodity price exposure inherent in their businesses. The commodity risk created by these instruments, including the offsetting impact on the market value of natural gas inventory, is described below. CenterPoint Energy and CERC measure this commodity risk using a sensitivity analysis. For purposes of this analysis, CenterPoint Energy and CERC estimate commodity price risk by applying a $0.50 change in the forward NYMEX price to their net open fixed price position (including forward fixed price physical contracts, natural gas inventory and fixed price financial contracts) at the end of each period. As of December 31, 2018, the recorded fair value of CenterPoint Energy’s and CERC’s non-trading energy derivatives was a net asset of $12 million (before collateral), all of which is related to CenterPoint Energy’s and CERC’s Energy Services reportable segment. A $0.50 change in the forward NYMEX price would have had a combined impact of $7 million on CenterPoint Energy’s and CERC’s non-trading energy derivatives net asset and the market value of natural gas inventory.

Commodity price risk is not limited to changes in forward NYMEX prices. Variation of commodity pricing between the different indices used to mark to market portions of CenterPoint Energy’s and CERC’s natural gas inventory (Gas Daily) and the related fair value hedge (NYMEX) can result in volatility to CenterPoint Energy’s and CERC’s net income. Over time, any gains or losses on the sale of storage gas inventory would be offset by gains or losses on the fair value hedges.

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Item 8.        Financial Statements and Supplementary Data

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

CenterPoint Energy, Inc.

Houston, Texas

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of CenterPoint Energy, Inc. and subsidiaries (the “Company”) as of December 31, 2018 and 2017, the related statements of consolidated income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an unqualified opinion on the Company’s internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019 

We have served as the Company’s auditor since 1932.

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CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

STATEMENTS OF CONSOLIDATED INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions, except per share amounts)
Revenues:
Utility revenues	$	6,163		$	5,603		$	5,440
Non-utility revenues	4,426			4,011			2,088
Total	10,589			9,614			7,528
Expenses:
Utility natural gas	1,410			1,109			983
Non-utility natural gas	4,364			3,785			1,983
Operation and maintenance	2,335			2,157			2,029
Depreciation and amortization	1,243			1,036			1,126
Taxes other than income taxes	406			391			384
Total	9,758			8,478			6,505
Operating Income	831			1,136			1,023
Other Income (Expense):
Gain (loss) on marketable securities	(22		)	7			326
Gain (loss) on indexed debt securities	(232		)	49			(413		)
Interest and other finance charges	(361		)	(313		)	(338		)
Interest on Securitization Bonds	(59		)	(77		)	(91		)
Equity in earnings of unconsolidated affiliates, net	307			265			208
Other, net	50			(4		)	(29		)
Total	(317		)	(73		)	(337		)
Income Before Income Taxes	514			1,063			686
Income tax expense (benefit)	146			(729		)	254
Net Income	368			1,792			432
Preferred stock dividend requirement	35			—			—
Income Available to Common Shareholders	$	333		$	1,792		$	432
Basic Earnings Per Common Share	$	0.74		$	4.16		$	1.00
Diluted Earnings Per Common Share	$	0.74		$	4.13		$	1.00
Weighted Average Common Shares Outstanding, Basic	449			431			431
Weighted Average Common Shares Outstanding, Diluted	452			434			434

See Combined Notes to Consolidated Financial Statements

85

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Net income	$	368		$	1,792		$	432
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans (net of tax expense (benefit) of ($2), $6 and ($4), respectively)	(10		)	6			(7		)
Net deferred gain (loss) from cash flow hedges (net of tax expense (benefit) of ($4), ($2), and $-0-, respectively)	(15		)	(3		)	1
Reclassification of deferred loss from cash flow hedges realized in net income (net of tax expense of $-0-, $-0-, and $1, respectively)	—			—			1
Other comprehensive income (loss)	(25		)	3			(5		)
Comprehensive income	343			1,795			427
Preferred stock dividend requirement	35			—			—
Comprehensive income available to common shareholders	$	308		$	1,795		$	427

See Combined Notes to Consolidated Financial Statements

86

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	December 31, 2018		December 31, 2017
	(in millions)
ASSETS
Current Assets:
Cash and cash equivalents ($335 and $230 related to VIEs, respectively)	$	4,231	$	260
Investment in marketable securities	540		960
Accounts receivable ($56 and $73 related to VIEs, respectively), less bad debt reserve of $18 and $19, respectively	1,190		1,000
Accrued unbilled revenues	378		427
Natural gas inventory	194		222
Materials and supplies	200		175
Non-trading derivative assets	100		110
Prepaid expense and other current assets ($34 and $35 related to VIEs, respectively)	192		241
Total current assets	7,025		3,395
Property, Plant and Equipment, net	14,044		13,057
Other Assets:
Goodwill	867		867
Regulatory assets ($1,059 and $1,590 related to VIEs, respectively)	1,967		2,347
Non-trading derivative assets	38		44
Investment in unconsolidated affiliates	2,482		2,472
Preferred units - unconsolidated affiliate	363		363
Other	223		191
Total other assets	5,940		6,284
Total Assets	$	27,009	$	22,736

See Combined Notes to Consolidated Financial Statements

87

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS, cont.

	December 31, 2018			December 31, 2017
	(in millions, except par value and shares)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities:
Short-term borrowings	$	—		$	39
Current portion of VIE Securitization Bonds long-term debt	458			434
Indexed debt, net	24			122
Current portion of other long-term debt	—			50
Indexed debt securities derivative	601			668
Accounts payable	1,240			963
Taxes accrued	204			181
Interest accrued	121			104
Dividends accrued	187			120
Non-trading derivative liabilities	126			20
Other	341			368
Total current liabilities	3,302			3,069
Other Liabilities:
Deferred income taxes, net	3,239			3,174
Non-trading derivative liabilities	5			4
Benefit obligations	796			785
Regulatory liabilities	2,525			2,464
Other	402			357
Total other liabilities	6,967			6,784
Long-term Debt:
VIE Securitization Bonds, net	977			1,434
Other long-term debt, net	7,705			6,761
Total long-term debt, net	8,682			8,195
Commitments and Contingencies (Note 16)
Shareholders’ Equity:
Cumulative preferred stock, $0.01 par value, 20,000,000 shares authorized	—			—
Series A Preferred Stock, $0.01 par value, $800 aggregate liquidation preference, 800,000 shares outstanding	790			—
Series B Preferred Stock, $0.01 par value, $978 aggregate liquidation preference, 977,500 shares outstanding	950			—
Common stock, $0.01 par value, 1,000,000,000 shares authorized, 501,197,784 shares and 431,044,845 shares outstanding, respectively	5			4
Additional paid-in capital	6,072			4,209
Retained earnings	349			543
Accumulated other comprehensive loss	(108		)	(68		)
Total shareholders’ equity	8,058			4,688
Total Liabilities and Shareholders’ Equity	$	27,009		$	22,736

See Combined Notes to Consolidated Financial Statements

88

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

STATEMENTS OF CONSOLIDATED CASH FLOWS

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Cash Flows from Operating Activities:
Net income	$	368		$	1,792		$	432
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,243			1,036			1,126
Amortization of deferred financing costs	48			24			26
Deferred income taxes	48			(770		)	213
Unrealized loss (gain) on marketable securities	22			(7		)	(326		)
Loss (gain) on indexed debt securities	232			(49		)	413
Write-down of natural gas inventory	2			—			1
Equity in earnings of unconsolidated affiliates, net of distributions	(40		)	(265		)	(208		)
Pension contributions	(69		)	(48		)	(9		)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	(154		)	(216		)	(117		)
Inventory	1			(7		)	34
Taxes receivable	—			30			142
Accounts payable	220			136			133
Fuel cost recovery	33			(85		)	(72		)
Non-trading derivatives, net	103			(84		)	30
Margin deposits, net	5			(55		)	101
Interest and taxes accrued	40			5			5
Net regulatory assets and liabilities	28			(107		)	(60		)
Other current assets	—			(3		)	(25		)
Other current liabilities	(24		)	34			22
Other assets	6			(4		)	(16		)
Other liabilities	12			36			30
Other, net	12			24			48
Net cash provided by operating activities	2,136			1,417			1,923
Cash Flows from Investing Activities:
Capital expenditures	(1,651		)	(1,426		)	(1,414		)
Acquisitions, net of cash acquired	—			(132		)	(102		)
Decrease in notes receivable - unconsolidated affiliate	—			—			363
Investment in preferred units - unconsolidated affiliate	—			—			(363		)
Distributions from unconsolidated affiliates in excess of cumulative earnings	30			297			297
Proceeds from sale of marketable securities	398			—			178
Other, net	16			4			7
Net cash used in investing activities	(1,207		)	(1,257		)	(1,034		)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(39		)	4			(5		)
Proceeds from (payments of) commercial paper, net	(1,543		)	349			469
Proceeds from long-term debt, net	2,495			1,096			600
Payments of long-term debt	(484		)	(1,211		)	(1,218		)
Loss on reacquired debt	—			(5		)	(22		)
Debt and equity issuance costs	(47		)	(13		)	(9		)
Payment of dividends on Common Stock	(499		)	(461		)	(443		)
Payment of dividends on preferred stock	(11		)	—			—
Proceeds from issuance of Common Stock, net	1,844			—			—
Proceeds from issuance of preferred stock, net	1,740			—			—
Distribution to ZENS holders	(398		)	—			(178		)
Other, net	(5		)	(4		)	(2		)
Net cash provided by (used in) financing activities	3,053			(245		)	(808		)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	3,982			(85		)	81
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	296			381			300
Cash, Cash Equivalents and Restricted Cash at End of Year	$	4,278		$	296		$	381

See Combined Notes to Consolidated Financial Statements

89

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY

	2018					2017				2016
	Shares	Amount				Shares	Amount			Shares	Amount
	(in millions of dollars and shares, except per share amounts)
Cumulative Preferred Stock, $0.01 par value; authorized 20,000,000 shares
Balance, beginning of year	—	$	—			—	$	—		—	$	—
Issuances of Series A Preferred Stock	1	790				—	—			—	—
Issuances of Series B Preferred Stock	1	950				—	—			—	—
Balance, end of year	2	1,740				—	—			—	—
Common Stock, $0.01 par value; authorized 1,000,000,000 shares
Balance, beginning of year	431	4				431	4			430	4
Issuances related to benefit and investment plans	—	—				—	—			1	—
Issuances of Common Stock	70	1				—	—			—	—
Balance, end of year	501	5				431	4			431	4
Additional Paid-in-Capital
Balance, beginning of year		4,209					4,195				4,180
Issuances related to benefit and investment plans		19					14				15
Issuances of Common Stock, net of issuance costs		1,844					—				—
Balance, end of year		6,072					4,209				4,195
Retained Earnings (Accumulated Deficit)
Balance, beginning of year		543					(668		)		(657		)
Net income		368			0.000372		1,792				432
Common Stock dividends declared ($1.12, $1.3475 and $1.03 per share, respectively)		(523		)			(581		)		(443		)
Series A Preferred Stock dividends declared ($32.1563, $-0- and $-0- per share, respectively)		(26		)			—				—
Series B Preferred Stock dividends declared ($29.1667, $-0- and $-0- per share, respectively)		(28		)			—				—
Adoption of ASU 2018-02		15					—				—
Balance, end of year		349					543				(668		)
Accumulated Other Comprehensive Loss
Balance, beginning of year		(68		)			(71		)		(66		)
Other comprehensive income (loss)		(25		)			3				(5		)
Adoption of ASU 2018-02		(15		)			—				—
Balance, end of year		(108		)			(68		)		(71		)
Total Shareholders’ Equity		$	8,058				$	4,688			$	3,460

See Combined Notes to Consolidated Financial Statements

90

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Member of

CenterPoint Energy Houston Electric, LLC

Houston, Texas

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of CenterPoint Energy Houston Electric, LLC and subsidiaries (the “Company”, an indirect wholly owned subsidiary of CenterPoint Energy, Inc.) as of December 31, 2018 and 2017, the related statements of consolidated income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019

We have served as the Company’s auditor since 1932.

91

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues	$	3,234		$	2,998		$	3,059
Expenses:
Operation and maintenance	1,452			1,402			1,338
Depreciation and amortization	917			724			838
Taxes other than income taxes	240			235			231
Total	2,609			2,361			2,407
Operating Income	625			637			652
Other Income (Expense):
Interest and other finance charges	(138		)	(128		)	(126		)
Interest on Securitization Bonds	(59		)	(77		)	(91		)
Other, net	(3		)	(8		)	(10		)
Total	(200		)	(213		)	(227		)
Income Before Income Taxes	425			424			425
Income tax expense (benefit)	89			(9		)	149
Net Income	$	336		$	433		$	276

See Combined Notes to Consolidated Financial Statements

92

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Net income	$	336		$	433		$	276
Other comprehensive income (loss):
Net deferred gain (loss) from cash flow hedges (net of tax expense (benefit) of ($4), $-0-, and $-0-)	(14		)	(1		)	1
Other comprehensive income (loss):	(14		)	(1		)	1
Comprehensive income	$	322		$	432		$	277

See Combined Notes to Consolidated Financial Statements

93

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

CONSOLIDATED BALANCE SHEETS

	December 31, 2018			December 31, 2017
	(in millions)
ASSETS
Current Assets:
Cash and cash equivalents ($335 and $230 related to VIEs, respectively)	$	335		$	238
Accounts and notes receivable, net ($56 and $73 related to VIEs, respectively), less bad debt reserve of $1 and $1, respectively	283			284
Accounts and notes receivable—affiliated companies	20			7
Accrued unbilled revenues	110			120
Materials and supplies	135			119
Taxes receivable	5			—
Other ($34 and $35 related to VIEs, respectively)	61			62
Total current assets	949			830
Property, Plant and Equipment, net	8,402			7,863
Other Assets:
Regulatory assets ($1,059 and $1,590 related to VIEs, respectively)	1,124			1,570
Other	32			29
Total other assets	1,156			1,599
Total Assets	$	10,507		$	10,292
LIABILITIES AND MEMBER’S EQUITY
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt	$	458		$	434
Accounts payable	262			243
Accounts and notes payable—affiliated companies	78			104
Taxes accrued	115			116
Interest accrued	64			65
Non-trading derivative liabilities	24			—
Other	89			120
Total current liabilities	1,090			1,082
Other Liabilities:
Deferred income taxes, net	1,023			1,059
Benefit obligations	91			146
Regulatory liabilities	1,298			1,263
Other	65			54
Total other liabilities	2,477			2,522
Long-Term Debt, net:
VIE Securitization Bonds, net	977			1,434
Other long-term debt, net	3,281			2,885
Total long-term debt, net	4,258			4,319
Commitments and Contingencies (Note 16)
Member’s Equity:
Common stock	—			—
Paid-in capital	1,896			1,696
Retained earnings	800			673
Accumulated other comprehensive loss	(14		)	—
Total member’s equity	2,682			2,369
Total Liabilities and Member’s Equity	$	10,507		$	10,292

See Combined Notes to Consolidated Financial Statements

94

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED CASH FLOWS

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Cash Flows from Operating Activities:
Net income	$	336		$	433		$	276
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	917			724			838
Amortization of deferred financing costs	11			13			14
Deferred income taxes	(38		)	(98		)	(34		)
Changes in other assets and liabilities:
Accounts and notes receivable, net	11			(73		)	(1		)
Accounts receivable/payable–affiliated companies	20			(46		)	63
Inventory	(16		)	15			(1		)
Accounts payable	(1		)	59			(4		)
Taxes receivable	(5		)	6			53
Interest and taxes accrued	(2		)	7			4
Non-trading derivatives, net	5			—			—
Net regulatory assets and liabilities	(97		)	(148		)	(110		)
Other current assets	(2		)	(6		)	(6		)
Other current liabilities	(26		)	16			21
Other assets	(3		)	13			(8		)
Other liabilities	17			(4		)	(4		)
Other, net	(12		)	(6		)	1
Net cash provided by operating activities	1,115			905			1,102
Cash Flows from Investing Activities:
Capital expenditures	(922		)	(875		)	(862		)
Decrease (increase) in notes receivable–affiliated companies	—			96			(96		)
Other, net	11			3			7
Net cash used in investing activities	(911		)	(776		)	(951		)
Cash Flows from Financing Activities:
Proceeds from long-term debt, net	398			298			600
Payments of long-term debt	(434		)	(411		)	(590		)
Dividend to parent	(209		)	(180		)	(135		)
Increase (decrease) in notes payable–affiliated companies	(59		)	60			(312		)
Debt issuance costs	(4		)	(3		)	(6		)
Contribution from parent	200			—			374
Net cash used in financing activities	(108		)	(236		)	(69		)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	96			(107		)	82
Cash, Cash Equivalents and Restricted Cash at Beginning of the Year	274			381			299
Cash, Cash Equivalents and Restricted Cash at End of the Year	$	370		$	274		$	381

See Combined Notes to Consolidated Financial Statements

95

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY

	2018				2017				2016
	Shares	Amount			Shares	Amount			Shares	Amount
	(in millions, except share amounts)
Common Stock
Balance, beginning of year	1,000	$	—		1,000	$	—		1,000	$	—
Balance, end of year	1,000	—			1,000	—			1,000	—
Additional Paid-in-Capital
Balance, beginning of year		1,696				1,696				1,322
Contribution from parent		200				—				374
Balance, end of year		1,896				1,696				1,696
Retained Earnings
Balance, beginning of year		673				420				279
Net income		336				433				276
Dividend to parent		(209		)		(180		)		(135		)
Balance, end of year		800				673				420
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of year		—				1				—
Other comprehensive income (loss)		(14		)		(1		)		1
Balance, end of year		(14		)		—				1
Total Member’s Equity		$	2,682			$	2,369			$	2,117

See Combined Notes to Consolidated Financial Statements

96

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholder of

CenterPoint Energy Resources Corp.

Houston, Texas

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of CenterPoint Energy Resources Corp. and subsidiaries (the “Company”, an indirect wholly owned subsidiary of CenterPoint Energy, Inc.) as of December 31, 2018 and 2017, the related statements of consolidated income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas  

February 28, 2019  

We have served as the Company’s auditor since 1997.

97

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Revenues:
Utility revenues	$	2,931		$	2,606		$	2,380
Non-utility revenues	4,412			3,997			2,074
Total	7,343			6,603			4,454
Expenses:
Utility natural gas	1,410			1,109			983
Non-utility natural gas	4,364			3,785			1,983
Operation and maintenance	898			816			754
Depreciation and amortization	293			279			249
Taxes other than income taxes	156			147			144
Total	7,121			6,136			4,113
Operating Income	222			467			341
Other Income (Expense):
Interest and other finance charges	(122		)	(123		)	(122		)
Other, net	(8		)	(25		)	(20		)
Total	(130		)	(148		)	(142		)
Income From Continuing Operations Before Income Taxes	92			319			199
Income tax expense (benefit)	22			(265		)	81
Income From Continuing Operations	70			584			118
Income from discontinued operations (net of tax expense of $46, $104, and $81, respectively)	138			161			127
Net Income	$	208		$	745		$	245

See Combined Notes to Consolidated Financial Statements

98

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Net income	$	208		$	745		$	245
Other comprehensive income (loss):
Adjustment to postretirement and other postemployment plans (net of tax expense (benefit) of $1, $4 and ($4))	1			4			(6		)
Net deferred loss from cash flow hedges (net of tax expense (benefit) of $-0-, ($1), and $-0-, respectively)	(1		)	(1		)	—
Other comprehensive income (loss)	—			3			(6		)
Comprehensive income	$	208		$	748		$	239

See Combined Notes to Consolidated Financial Statements

99

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

CONSOLIDATED BALANCE SHEETS

	December 31,
	2018		2017
	(in millions)
ASSETS
Current Assets:
Cash and cash equivalents	$	14	$	12
Accounts receivable, less bad debt reserve of $17 million and $18 million, respectively	894		713
Accrued unbilled revenue	268		307
Accounts and notes receivable — affiliated companies	120		6
Material and supplies	65		56
Natural gas inventory	194		222
Non-trading derivative assets	100		110
Prepaid expenses and other current assets	115		166
Total current assets	1,770		1,592
Property, Plant and Equipment, Net	5,226		4,852
Other Assets:
Goodwill	867		867
Regulatory Assets	181		181
Non-trading derivative assets	38		44
Investment in unconsolidated affiliates - discontinued operations	—		2,472
Other	132		104
Total other assets	1,218		3,668
Total Assets	$	8,214	$	10,112

See Combined Notes to Consolidated Financial Statements

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CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

CONSOLIDATED BALANCE SHEETS, cont.

	December 31,
	2018		2017
	(in millions)
LIABILITIES AND STOCKHOLDER’S EQUITY
Current Liabilities:
Short-term borrowings	$	—	$	39
Accounts payable	856		669
Accounts and notes payable–affiliated companies	50		611
Taxes accrued	82		75
Interest accrued	38		32
Customer deposits	75		76
Non-trading derivative liabilities	102		20
Other	137		137
Total current liabilities	1,340		1,659
Other Liabilities:
Deferred income taxes, net	406		362
Deferred income taxes, net - discontinued operations	—		927
Non-trading derivative liabilities	5		4
Benefit obligations	93		97
Regulatory liabilities	1,227		1,201
Other	329		297
Total other liabilities	2,060		2,888
Long-Term Debt	2,371		2,457
Commitments and Contingencies (Note 16)
Stockholder’s Equity:
Common stock	—		—
Paid-in capital	2,015		2,528
Retained earnings	423		574
Accumulated other comprehensive income	5		6
Total stockholder’s equity	2,443		3,108
Total Liabilities and Stockholder’s Equity	$	8,214	$	10,112

See Combined Notes to Consolidated Financial Statements

101

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED CASH FLOWS

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Cash Flows from Operating Activities:
Net income	$	208		$	745		$	245
Less: Income from discontinued operations, net of tax	138			161			127
Income from continuing operations	70			584			118
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	293			279			249
Amortization of deferred financing costs	9			9			9
Deferred income taxes	31			(224		)	56
Write-down of natural gas inventory	2			—			1
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	(155		)	(143		)	(122		)
Accounts receivable/payable–affiliated companies	9			—			4
Inventory	17			(22		)	34
Accounts payable	163			64			117
Fuel cost recovery	33			(85		)	(72		)
Interest and taxes accrued	—			(41		)	26
Non-trading derivatives, net	98			(82		)	29
Margin deposits, net	5			(55		)	101
Net regulatory assets and liabilities	50			(27		)	—
Other current assets	4			2			(19		)
Other current liabilities	(3		)	15			2
Other assets	5			(8		)	(21		)
Other liabilities	6			6			(2		)
Other, net	1			6			2
Net cash provided by operating activities from continuing operations	638			278			512
Net cash provided by operating activities from discontinued operations	176			—			—
Net cash provided by operating activities	814			278			512
Cash Flows from Investing Activities:
Capital expenditures	(633		)	(513		)	(517		)
Acquisitions, net of cash acquired	—			(132		)	(102		)
Increase in notes receivable–affiliated companies	(114		)	—			—
Other, net	3			2			1
Net cash used in investing activities from continuing operations	(744		)	(643		)	(618		)
Net cash provided by investing activities from discontinued operations	47			297			660
Net cash provided by (used in) investing activities	(697		)	(346		)	42
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(39		)	4			(5		)
Proceeds from (payments of) commercial paper, net	(688		)	329			350
Proceeds from long-term debt	599			298			—
Payments of long-term debt	—			(550		)	(325		)
Dividends to parent	(360		)	(601		)	(643		)
Debt issuance costs	(5		)	(4		)	—
Loss on reacquired debt	—			(5		)	—
Contribution from parent	960			38			72
Increase (decrease) in notes payable–affiliated companies	(570		)	570			—
Other, net	(1		)	—			(2		)
Net cash provided by (used in) financing activities from continuing operations	(104		)	79			(553		)
Net cash provided by financing activities from discontinued operations	—			—			—
Net cash provided by (used in) financing activities	(104		)	79			(553		)
Net Increase in Cash, Cash Equivalents and Restricted Cash	13			11			1
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	12			1			—
Cash, Cash Equivalents and Restricted Cash at End of Year	$	25		$	12		$	1

See Combined Notes to Consolidated Financial Statements

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CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

(An Indirect, Wholly-Owned Subsidiary of CenterPoint Energy, Inc.)

STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY

	2018				2017				2016
	Shares	Amount			Shares	Amount			Shares	Amount
	(in millions, except share amounts)
Common Stock
Balance, beginning of year	1,000	$	—		1,000	$	—		1,000	$	—
Balance, end of year	1,000	—			1,000	—			1,000	—
Additional Paid-in-Capital
Balance, beginning of year		2,528				2,489				2,417
Contribution from parent		960				38				72
Capital distribution to parent associated with Internal Spin		(1,473		)		—				—
Other		—				1				—
Balance, end of year		2,015				2,528				2,489
Retained Earnings
Balance, beginning of year		574				430				828
Net income		208				745				245
Dividend to parent		(360		)		(601		)		(643		)
Adoption of ASU 2018-02		1				—				—
Balance, end of year		423				574				430
Accumulated Other Comprehensive Income
Balance, beginning of year		6				3				9
Other comprehensive income (loss)		—				3				(6		)
Adoption of ASU 2018-02		(1		)		—				—
Balance, end of year		5				6				3
Total Stockholder’s Equity		$	2,443			$	3,108			$	2,922

See Combined Notes to Consolidated Financial Statements

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CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

COMBINED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1) Background

No Registrant makes any representations as to the information related solely to CenterPoint Energy or the subsidiaries of CenterPoint Energy other than itself.

General. Included in this combined Form 10-K are the Financial Statements of CenterPoint Energy, Houston Electric and CERC, which are referred to collectively as the Registrants. The Combined Notes to the Consolidated Financial Statements apply to all Registrants and specific references to Houston Electric and CERC herein also pertain to CenterPoint Energy, unless otherwise indicated.

Background. CenterPoint Energy, Inc. is a public utility holding company and owns interests in Enable as described below. As of December 31, 2018, CenterPoint Energy’s operating subsidiaries, Houston Electric and CERC, owned and operated electric transmission and distribution and natural gas distribution facilities and supplied natural gas to commercial and industrial customers and electric and natural gas utilities.

• Houston Electric engages in the electric transmission and distribution business in the Texas Gulf Coast area that includes the city of Houston; and

• CERC Corp. (i) owns and operates natural gas distribution systems in six states and (ii) obtains and offers competitive variable and fixed-price physical natural gas supplies and services primarily to commercial and industrial customers and electric and natural gas utilities in over 30 states through its wholly-owned subsidiary, CES.

As of December 31, 2018, CenterPoint Energy, indirectly through CNP Midstream, owned approximately 54.0% of the common units representing limited partner interests in Enable, 50% of the management rights and 40% of the incentive distribution rights in Enable GP and also directly owned an aggregate of 14,520,000 Enable Series A Preferred Units. Enable owns, operates and develops natural gas and crude oil infrastructure assets.

On April 21, 2018, CenterPoint Energy entered into the Merger Agreement to acquire Vectren for approximately $6 billion in cash. On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren. For further information about the closing of the Merger, see Note 4.

For a description of CenterPoint Energy’s and CERC’s reportable segments, see Note 19. Houston Electric consists of a single reportable segment, Electric Transmission & Distribution.

(2) Summary of Significant Accounting Policies

(a) Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

(b) Principles of Consolidation

The accounts of the Registrants and their wholly-owned and majority-owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation.

As of December 31, 2018, CenterPoint Energy and Houston Electric had VIEs consisting of the Bond Companies, which are consolidated. The consolidated VIEs are wholly-owned, bankruptcy remote special purpose entities that were formed solely for the purpose of securitizing transition and system restoration related property. Creditors of CenterPoint Energy and Houston Electric have no recourse to any assets or revenues of the Bond Companies. The bonds issued by these VIEs are payable only from and

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secured by transition and system restoration property and the bondholders have no recourse to the general credit of CenterPoint Energy or Houston Electric.

(c) Equity and Investments without a Readily Determinable Fair Value (CenterPoint Energy and CERC)

CenterPoint Energy and CERC generally use the equity method of accounting for investments in entities in which they have an ownership interest between 20% and 50% and exercise significant influence. CenterPoint Energy and CERC also use the equity method for investments in which they have ownership percentages greater than 50%, when they exercise significant influence, do not have control and are not considered the primary beneficiary, if applicable.

Under the equity method, CenterPoint Energy and CERC adjust their investments each period for contributions made, distributions received, respective shares of comprehensive income and amortization of basis differences, as appropriate. CenterPoint Energy and CERC evaluate their equity method investments for impairment when events or changes in circumstances indicate there is a loss in value of the investment that is other than a temporary decline.

CenterPoint Energy and CERC consider distributions received from equity method investments which do not exceed cumulative equity in earnings subsequent to the date of investment to be a return on investment and classify these distributions as operating activities in their respective Statements of Consolidated Cash Flows. CenterPoint Energy and CERC consider distributions received from equity method investments in excess of cumulative equity in earnings subsequent to the date of investment to be a return of investment and classify these distributions as investing activities in their respective Statements of Consolidated Cash Flows.

On September 4, 2018, CERC completed the Internal Spin of its equity investment in Enable and Enable GP. For further information regarding the Internal Spin, see Note 11.

Investments without a readily determinable fair value will be measured at cost, less impairment, plus or minus observable prices changes of an identical or similar investment of the same issuer.

(d) Revenues

The Registrants record revenue for electricity delivery and natural gas sales and services under the accrual method and these revenues are recognized upon delivery to customers. Electricity deliveries not billed by month-end are accrued based on actual AMS data, daily supply volumes and applicable rates. Natural gas sales not billed by month-end are accrued based upon estimated purchased gas volumes, estimated lost and unaccounted for gas and currently effective tariff rates. For further discussion, see Note 5.

(e) Long-lived Assets and Intangibles Subject to Amortization

The Registrants record property, plant and equipment at historical cost and expense repair and maintenance costs as incurred.

The Registrants periodically evaluate long-lived assets, including property, plant and equipment, and specifically identifiable intangibles subject to amortization, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets compared to the carrying value of the assets.

(f) Regulatory Assets and Liabilities

The Registrants apply the guidance for accounting for regulated operations to the Electric Transmission & Distribution reportable segment and the Natural Gas Distribution reportable segment. The Registrants’ rate-regulated subsidiaries may collect revenues subject to refund pending final determination in rate proceedings. In connection with such revenues, estimated rate refund liabilities are recorded which reflect management’s current judgment of the ultimate outcomes of the proceedings.

The Registrants’ rate-regulated businesses recognize removal costs as a component of depreciation expense in accordance with regulatory treatment. In addition, a portion of the amount of removal costs collected from customers that relate to AROs has been reclassified from a regulatory liability to an asset retirement liability in accordance with accounting guidance for AROs.

For further detail on the Registrants’ regulatory assets and liabilities, see Note 7.

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(g) Depreciation and Amortization Expense

The Registrants compute depreciation and amortization using the straight-line method based on economic lives or regulatory-mandated recovery periods. Amortization expense includes amortization of certain regulatory assets and other intangibles.

(h) Capitalization of Interest and AFUDC

The Registrants capitalize interest and AFUDC as a component of projects under construction and amortize over the assets’ estimated useful lives once the assets are placed in service. AFUDC represents the composite interest cost of borrowed funds and a reasonable return on the equity funds used for construction for subsidiaries that apply the guidance for accounting for regulated operations. Although AFUDC increases both utility plant and earnings, it is realized in cash when the assets are included in rates.

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Interest and AFUDC debt (1)	$	8	$	6	$	2	$	9	$	6	$	2	$	8	$	6	$	2
AFUDC equity (2)	12		10		2		11		10		1		7		6		1

(1) Included in Interest and other finance charges on the Registrants’ respective Statements of Consolidated Income.

(2) Included in Other Income (Expense) on the Registrants’ respective Statements of Consolidated Income.

(i) Income Taxes

Houston Electric and CERC are included in CenterPoint Energy’s U.S. federal consolidated income tax return. Houston Electric and CERC report their income tax provision on a separate entity basis pursuant to a tax sharing agreement with CenterPoint Energy.  Current federal and certain state income taxes are payable to or receivable from CenterPoint Energy.

The Registrants use the asset and liability method of accounting for deferred income taxes. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is established against deferred tax assets for which management believes realization is not considered to be more likely than not. The Registrants recognize interest and penalties as a component of income tax expense (benefit), as applicable, in their respective Statements of Consolidated Income. CenterPoint Energy reports the income tax provision associated with its interest in Enable in income tax expense (benefit) in its Statements of Consolidated Income.

On December 22, 2017, President Trump signed into law comprehensive tax reform legislation informally called the Tax Cuts and Jobs Acts, or TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018. See Note 15 for further discussion of the impacts of tax reform implementation.

To the extent certain EDIT of the Registrants’ rate-regulated subsidiaries may be recoverable or payable through future rates, regulatory assets and liabilities have been recorded, respectively.

The Registrants use the portfolio approach to recognize income tax effects on other comprehensive income from accumulated other comprehensive income.

(j) Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount and do not bear interest. Management reviews the outstanding accounts receivable, as well as the bad debt write-offs experienced in the past, and establishes an allowance for doubtful accounts. Account balances are charged off against the allowance when management determines it is probable the receivable will not be recovered.

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The table below summarizes the Registrants’ provision for doubtful accounts for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Provision for doubtful accounts	$	16	$	—	$	16	$	14	$	1	$	13	$	7	$	—	$	7

(k) Inventory

The Registrants’ inventory consists principally of materials and supplies and, for CERC, natural gas. Materials and supplies are valued at the lower of average cost or market.  Materials and supplies are recorded to inventory when purchased and subsequently charged to expense or capitalized to plant when installed. Natural gas inventories of CERC’s Energy Services business segment at locations qualifying for and utilizing the fair value hedge accounting election are valued at fair value; inventories at locations not qualifying for or not utilizing the fair value hedge accounting election are valued at the lower of average cost or market. During 2018, 2017 and 2016, CERC recorded write-downs of natural gas inventory to the lower of average cost or market which are disclosed on the respective Statements of Consolidated Cash Flows.

(l) Derivative Instruments

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business.  The Registrants utilize derivative instruments such as physical forward contracts, swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows. Such derivatives are recognized in the Registrants’ Consolidated Balance Sheets at their fair value unless the Registrant elects the normal purchase and sales exemption for qualified physical transactions. A derivative may be designated as a normal purchase or normal sale if the intent is to physically receive or deliver the product for use or sale in the normal course of business.

CenterPoint Energy has a Risk Oversight Committee composed of corporate and reportable segment officers that oversees commodity price, weather and credit risk activities, including the Registrants’ marketing, risk management services and hedging activities. The committee’s duties are to establish the Registrants’ commodity risk policies, allocate board-approved commercial risk limits, approve the use of new products and commodities, monitor positions and ensure compliance with the Registrants’ risk management policies and procedures and limits established by CenterPoint Energy’s Board of Directors.

The Registrants’ policies prohibit the use of leveraged financial instruments. A leveraged financial instrument, for this purpose, is a transaction involving a derivative whose financial impact will be based on an amount other than the notional amount or volume of the instrument.

(m) Investments in Equity Securities (CenterPoint Energy and CERC)

CenterPoint Energy and CERC report equity securities at estimated fair value in their respective Consolidated Balance Sheets, and any unrealized holding gains and losses are recorded as Other Income (Expense) in their respective Statements of Consolidated Income.

(n) Environmental Costs

The Registrants expense or capitalize environmental expenditures, as appropriate, depending on their future economic benefit. The Registrants expense amounts that relate to an existing condition caused by past operations that do not have future economic benefit. The Registrants record undiscounted liabilities related to these future costs when environmental assessments and/or remediation activities are probable and the costs can be reasonably estimated.

(o) Cash and Cash Equivalents and Restricted Cash

For purposes of reporting cash flows, the Registrants consider cash equivalents to be short-term, highly-liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents held by the Bond Companies (VIEs) solely to support servicing the Securitization Bonds as of December 31, 2018 and 2017 are reflected on CenterPoint Energy’s and Houston Electric’s Consolidated Balance Sheets.

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In connection with the issuance of Securitization Bonds, CenterPoint Energy and Houston Electric were required to establish restricted cash accounts to collateralize the bonds that were issued in these financing transactions. These restricted cash accounts are not available for withdrawal until the maturity of the bonds and are not included in cash and cash equivalents. For more information on restricted cash see Note 20.

(p) Preferred Stock and Dividends

Preferred stock is evaluated to determine balance sheet classification, and all conversion and redemption features are evaluated for bifurcation treatment. Proceeds received net of issuance costs are recognized on the settlement date. Cash dividends become a liability once declared. Income available to common stockholders is computed by deducting from net income the dividends accumulated and earned during the period on cumulative preferred stock.

(q) Purchase Accounting

The Registrants evaluate acquisitions to determine when a set of acquired activities and assets represent a business.  When control of a business is obtained, the Registrants apply the acquisition method of accounting and record the assets acquired, liabilities assumed and any non-controlling interest obtained based on fair value at the acquisition date. The excess of the fair value of purchase consideration over the fair value of the net assets acquired is recorded as goodwill. The results of operations of the acquired business are included in the Registrants’ respective Statements of Consolidated Income beginning on the date of the acquisition.

(r) New Accounting Pronouncements

The following table provides an overview of recently adopted or issued accounting pronouncements applicable to all the Registrants, unless otherwise noted.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2014-09- Revenue from Contracts with Customers (Topic 606) and related amendments	This standard provides a comprehensive new revenue recognition model that requires revenue to be recognized in a manner that depicts the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. Transition method: modified retrospective	January 1, 2018	Note 5 addresses the disclosure requirements. Adoption of the standard did not result in significant changes to revenue recognition. A substantial amount of the Registrants’ revenues are tariff and/or derivative based, which were not significantly impacted by these ASUs.
ASU 2017-05- Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets	This standard clarifies when and how to apply ASC 610-20, which was issued as part of ASU 2014-09. It amends or supersedes the guidance in ASC 350 and ASC 360 on determining a gain or loss recognized upon the derecognition of nonfinancial assets. This standard also eliminates industry specific guidance, including ASC 360-20 Property, Plant, and Equipment - Real Estate Sales, for the recognition of gains or losses upon the sale of in-substance real estate. Transition method: modified retrospective	January 1, 2018	CenterPoint Energy and CERC elected to apply the practical expedient upon adoption to only evaluate transactions that were not determined to be complete as of the date of adoption. Subsequent to adoption, gains or losses on sales or dilution events in CenterPoint Energy’s investment in Enable may result in gains or losses recognized in earnings.
ASU 2016-01-Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2018-03-Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This standard requires equity investments that do not result in consolidation and are not accounted for under the equity method to be measured at fair value and to recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. It does not change the guidance for classifying and measuring investments in debt securities and loans. It also changes certain disclosure requirements and other aspects related to recognition and measurement of financial assets and financial liabilities. Transition method: cumulative-effect adjustment to beginning retained earnings, and two features prospective	January 1, 2018	The adoption of this standard did not have an impact on the Registrants’ financial position, results of operations or cash flows. The Registrants elected the practicability exception for investments without a readily determinable fair value to be measured at cost. This includes the Enable Series A Preferred Units owned by CenterPoint Energy, which were previously accounted for under the cost method. See Note 11 for further discussion.

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Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2016-15- Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This standard provides clarifying guidance on the classification of certain cash receipts and payments in the statement of cash flows and eliminates the variation in practice related to such classifications. Transition method:retrospective	January 1, 2018	The adoption did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, CenterPoint Energy’s and Houston Electric’s Statements of Consolidated Cash Flows reflect an increase in investing activities and a corresponding decrease in operating activities of $2 million, $4 million and $8 million for the years ended December 31, 2018, 2017 and 2016, respectively, due to the requirement that cash proceeds from COLI policies be classified as cash inflows from investing activity.
ASU 2016-18- Statement of Cash Flows (Topic 230): Restricted Cash	This standard requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, restricted cash and restricted cash equivalents. As a result, the statement of cash flows will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents. When cash, cash equivalents, restricted cash and restricted cash equivalents are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. Transition method: retrospective	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, the Registrants’ respective Statements of Consolidated Cash Flows are reconciled to cash, cash equivalents and restricted cash, resulting in a decrease in investing activities of $11 million for each of CenterPoint Energy’s and CERC’s respective Statements of Consolidated Cash Flows for the year ended December 31, 2018. In addition, each of CenterPoint Energy and Houston Electric showed a decrease of $4 million and an increase of $5 million in investing activities for the years ended December 31, 2017 and 2016, respectively, in their respective Statements of Consolidated Cash Flows. See Note 20 for further discussion.
ASU 2017-07- Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This standard requires an employer to report the service cost component of the net periodic pension cost and postretirement benefit cost in the same line item(s) as other employee compensation costs arising from services rendered during the period; all other components will be presented separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. Transition method: retrospective for the presentation of the service cost component and other components; prospective for the capitalization of the service cost component	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations, cash flows or disclosures; however, it resulted in the increases to operating income and corresponding decreases to other income reported in the table below. Other components of net periodic costs previously capitalized in assets are recorded as regulatory assets by the Registrants’ rate-regulated businesses prospectively from date of adoption.
ASU 2017-12- Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This standard, including standards amending this standard, expands an entity’s ability to hedge and account for risk components, reduces the complexity of applying certain aspects of hedge accounting and updates the presentation and disclosure requirements. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness. Transition method: cumulative-effect adjustment for elimination of the separate measurement of ineffectiveness; prospective for presentation and disclosure	July 1, 2018 Applicable January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows. As a result of the adoption, the Registrants will no longer recognize ineffectiveness for derivatives designated as cash flow hedges; all changes in fair value will flow through other comprehensive income. As the Registrants did not have existing cash flow hedges as of the initial application date and the adoption date, no cumulative effective adjustment was recorded. Note 9 reflects disclosures modified upon adoption.
ASU 2018-02-Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA and requires entities to provide certain disclosures regarding stranded tax effects. Transition method: in the period of adoption	October 1, 2018	The adoption of this standard did not impact the Registrants’ results of operations or cash flows. As a result of the adoption, CenterPoint Energy and CERC elected to reclassify a stranded tax benefit of $15 million and $1 million, respectively, primarily related to benefit plans, from accumulated other comprehensive loss and income to Retained earnings on their respective Consolidated Balance Sheets. The reclassification only encompasses the change in the federal corporate income tax rate due to the TCJA.
ASU 2018-13- Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement	This standard eliminates, modifies and adds certain disclosure requirements for fair value measurements. Transition method: prospective for additions and one modification and retrospective for all other amendments	Adoption of eliminations and modifications as of September 30, 2018; Additions will be adopted January 1, 2020	The adoption of this standard did not impact the Registrants’ financial position, results of operations or cash flows. Note 10 reflects the disclosures modified upon adoption.

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Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2018-14-Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans	This standard eliminates, modifies and adds certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Transition method: retrospective	October 1, 2018	The adoption of this standard did not impact the Registrants’ financial position, results of operations, and cash flows. Note 8 reflects the disclosures modified upon adoption.

The table below reflects the impact of adoption of ASU 2017-07 (Compensation—Retirement Benefits (Topic 715)) on each of the Registrants’ respective Statements of Consolidated Income:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Increase to operating income	$	47	$	21	$	11	$	64	$	26	$	23	$	64	$	25	$	23
Decrease to other income	47		21		11		64		26		23		64		25		23

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2016-02- Leases (Topic 842) and related amendments ASU 2018-01- Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842 ASU 2018-10 - Codification Improvements to Topic 842, Leases ASU 2018-11- Leases (Topic 842)-Targeted Improvements ASU 2018-20- Leases (Topic 842)-Narrow-Scope Improvements for Lessors	ASU 2016-02 provides a comprehensive new lease model that requires lessees to recognize assets and liabilities for most leases and would change certain aspects of lessor accounting. Transition method: modified retrospective ASU 2018-01 allows entities to elect not to assess whether existing land easements that were not previously accounted for in accordance with ASC 840 Leases under ASC 842 Leases when transitioning to the new leasing standard. ASU 2018-10 makes sixteen narrow-scope amendments to ASC 842 Leases. ASU 2018-11 allows entities the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption. It also gives lessors the practical expedient to not separate non-lease and lease components when certain criteria are met. ASU 2018-20 updates several narrow-scope changes for lessors, including sales taxes collected from lessees, lessor costs paid directly by lessees, and recognition of variable payments for contracts with lease and non-lease components.	January 1, 2019 Early adoption is permitted	The Registrants have completed the identification of leases under the revised definition. In addition to expanded disclosure for lessees and lessors, which will include qualitative disclosures of the nature of the lease population and additional quantitative information, the Registrants expect to recognize approximately $30 million, $1 million and $28 million of right-of-use assets and lease liabilities on the statements of financial position of CenterPoint Energy, Houston Electric and CERC, respectively, on the date of adoption but do not expect a material impact on their results of operations and cash flows.    The Registrants elected the practical expedient for existing easements provided by ASU 2018-01, and the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption provided by ASU 2018-11.
ASU 2016-13- Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This standard, including standards amending this standard, requires a new model called CECL to estimate credit losses for (1) financial assets subject to credit losses and measured at amortized cost and (2) certain off-balance sheet credit exposures. Upon initial recognition of the exposure, the CECL model requires an entity to estimate the credit losses expected over the life of an exposure based on historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Transition method: modified retrospective	January 1, 2020 Early adoption is permitted starting January 1, 2019	The Registrants are currently assessing the impact that this standard will have on their financial position, results of operations, cash flows and disclosures.

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Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2018-15- Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	This standard aligns accounting for implementation costs incurred in a cloud computing arrangement that is accounted for as a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The update also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. Transition method: retrospective or prospective	January 1, 2020 Early adoption is permitted	The adoption of this standard will allow the Registrants to capitalize certain implementation costs incurred in cloud computing arrangements that are accounted for as service contracts. The Registrants are currently assessing the impact that adoption of this standard will have on their financial position, results of operations, cash flows and disclosures.

Management believes that other recently adopted standards and recently issued standards that are not yet effective will not have a material impact on the Registrants’ financial position, results of operations or cash flows upon adoption.

(3) Property, Plant and Equipment

(a) Property, Plant and Equipment

Property, plant and equipment includes the following:

		December 31, 2018						December 31, 2017
	Weighted Average Useful Lives	Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net		Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net
CenterPoint Energy	(in years)	(in millions)
Electric Transmission & Distribution	35	$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
Natural Gas Distribution	28	7,257		2,128		5,129		6,735		1,968		4,767
Energy Services	27	121		43		78		102		35		67
Other property	26	741		306		435		698		338		360
Total		$	20,267	$	6,223	$	14,044	$	19,031	$	5,974	$	13,057
Houston Electric
Electric Transmission	45	$	3,077	$	650	$	2,427	$	2,767	$	620	$	2,147
Electric Distribution	33	7,524		2,553		4,971		7,178		2,522		4,656
Other transmission & distribution property	18	1,547		543		1,004		1,551		491		1,060
Total		$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
CERC
Natural Gas Distribution	28	$	7,257	$	2,128	$	5,129	$	6,735	$	1,968	$	4,767
Energy Services	27	121		43		78		102		35		67
Other property	23	53		34		19		51		33		18
Total		$	7,431	$	2,205	$	5,226	$	6,888	$	2,036	$	4,852

(b) Depreciation and Amortization

The following table presents depreciation and amortization expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Depreciation	$	626	$	342	$	264	$	619	$	354	$	243	$	607	$	349	$	230
Amortization of securitized regulatory assets	531		531		—		329		329		—		455		455		—
Other amortization	86		44		29		88		41		36		64		34		19
Total	$	1,243	$	917	$	293	$	1,036	$	724	$	279	$	1,126	$	838	$	249

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(c) AROs

The Registrants recorded AROs associated with the removal of asbestos and asbestos-containing material in its buildings, including substation building structures. CenterPoint Energy and Houston Electric also recorded AROs relating to treated wood poles for electric distribution, distribution transformers containing PCB (also known as Polychlorinated Biphenyl), and underground fuel storage tanks. CenterPoint Energy and CERC also recorded AROs relating to gas pipelines abandoned in place. The estimates of future liabilities were developed using historical information, and where available, quoted prices from outside contractors.

A reconciliation of the changes in the ARO liability recorded in Other non-current liabilities on each of the Registrants’ respective Consolidated Balance Sheets is as follows:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy		Houston Electric		CERC
	(in millions)
Beginning balance	$	281		$	35		$	243		$	205	$	33	$	169
Accretion expense (1)	10			1			9			8		1		7
Revisions in estimates (2)	(33		)	(2		)	(31		)	68		1		67
Ending balance	$	258		$	34		$	221		$	281	$	35	$	243

(1) Reflected in Regulatory assets on each of the Registrants’ respective Consolidated Balance Sheets.

(2) In 2018, CenterPoint Energy and CERC reflected a decrease in their respective ARO liability which is primarily attributable to increases in the long-term interest rates used for discounting in the ARO calculation. In 2017, CenterPoint Energy and CERC reflected an increase in their respective ARO liability which is primarily attributable to decreases in the long-term interest rates used for discounting in the ARO calculation.

(4) Mergers and Acquisitions

Merger with Vectren (CenterPoint Energy)

On February 1, 2019 (the Merger Date), pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. Each share of Vectren common stock issued and outstanding immediately prior to the closing was canceled and converted into the right to receive $72.00 in cash per share, without interest. At the closing, each stock unit payable in Vectren common stock or whose value is determined with reference to the value of Vectren common stock, whether vested or unvested, was canceled with cash consideration paid therefor in accordance with the terms of the Merger Agreement. These amounts did not include a stub period cash dividend of $0.41145 per share, which was declared, with CenterPoint Energy’s consent, by Vectren’s board of directors on January 16, 2019, and paid to Vectren stockholders as of the record date of February 1, 2019. See Notes 13 and 14 for further details regarding the Merger financings.

Following the closing, shares of Vectren common stock, which previously traded under the ticker symbol “VVC” on the NYSE, ceased trading on and were delisted from the NYSE.

On the Merger Date, Vectren became a wholly-owned subsidiary of CenterPoint Energy. Vectren, through its wholly owned subsidiary, VUHI, holds three public utilities:

• Indiana Gas provides energy delivery services to natural gas customers located in central and southern Indiana;

• SIGECO provides energy delivery services to electric and natural gas customers located near Evansville in southwestern Indiana and owns and operates electric generation assets to serve its electric customers and optimizes those assets in the wholesale power market; and

• VEDO provides energy delivery services to natural gas customers located near Dayton in west-central Ohio.

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Vectren is also involved in non-utility activities through two business units:

• Infrastructure Services provides underground pipeline construction and repair services; and

• ESG provides energy performance contracting and sustainable infrastructure, such as renewables, distributed generation and combined heat and power projects.

As of December 31, 2018, Vectren and its subsidiaries had outstanding $167 million of short-term debt and $2.2 billion of long-term debt, including current maturities. Vectren’s outstanding short-term and long-term debt on the closing date of the Merger became debt of CenterPoint Energy.

The Merger is anticipated to provide significant potential strategic benefits to CenterPoint Energy, including growth opportunities for more rate-regulated investment, more customers for existing products and services and additional products and services for existing customers. Additionally, CenterPoint Energy believes the Merger will increase geographic and business diversity as well as scale in attractive jurisdictions and economies.

The Merger is being accounted for in accordance with ASC 805, Business Combinations, with identifiable assets acquired and liabilities assumed recorded at their estimated fair values on the Merger Date. Due to the limited time between the Merger Date and this filing, CenterPoint Energy’s purchase price allocation for the assets acquired and the liabilities assumed in the Merger has not been completed. CenterPoint Energy will provide the required disclosures in the first quarter of 2019. The results of operations of Vectren will be reported in CenterPoint Energy’s consolidated financial statements beginning on the Merger Date.

CenterPoint Energy incurred transaction costs of $28 million and integration costs of $18 million in connection with the Merger for the year ended December 31, 2018, which were included in operation and maintenance expenses in CenterPoint Energy’s Statements of Consolidated Income.

Acquisition of AEM (CenterPoint Energy and CERC)

On January 3, 2017,CES completed the acquisition of AEM. After working capital adjustments, the final purchase price of $147 million was allocated to identifiable assets acquired and liabilities assumed based on their fair values on the acquisition date.

The goodwill of $5 million recorded as part of the acquisition primarily reflects the value of the complementary operational and geographic footprints, scale and expanded capabilities provided by the acquisition.

The fair value of the identifiable intangible assets and related useful lives included in the final purchase price allocation is as follows:

	Fair Value		Useful Life
	(in millions)		(in years)
Customer relationships	$	25	15

The following unaudited pro forma financial information reflects the consolidated results of operations of CenterPoint Energy and CERC, assuming the AEM acquisition had taken place on January 1, 2016. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved had the acquisition taken place on the dates indicated or the future consolidated results of operations of the combined companies.

	Year Ended December 31,
	2017				2016
	CenterPoint Energy		CERC		CenterPoint Energy		CERC
	(in millions)
Revenues	$	9,614	$	6,603	$	8,541	$	5,467
Net Income (1)	1,792		745		442		255

(1) Net income for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million and $396 million due to the TCJA for CenterPoint Energy and CERC, respectively. See Note 15 for further discussion of the impacts of tax reform implementation.

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(5) Revenue Recognition

The Registrants adopted ASC 606 and all related amendments on January 1, 2018 using the modified retrospective method for those contracts that were not completed as of the date of adoption. Application of the new revenue standard did not result in a cumulative effect adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The adoption of the new standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows.

In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Registrants expect to be entitled to receive in exchange for these goods or services. Contract assets and liabilities are not material.

The following tables disaggregate revenues by reportable segment and major source:

	Year Ended December 31, 2018
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,235		$	3,011		$	493		$	6	$	6,745		$	3,235		$	3,011		$	493		$	1	$	3,505
Derivatives income	(2		)	(2		)	4,028			—		4,024			—			(2		)	4,028			—		4,026
Other (3)	(1		)	(42		)	—			9		(34		)	(1		)	(42		)	—			—		(42		)
Eliminations	—			(36		)	(110		)	—		(146		)	—			(36		)	(110		)	—		(146		)
Total revenues	$	3,232		$	2,931		$	4,411		$	15	$	10,589		$	3,234		$	2,931		$	4,411		$	1	$	7,343
	Year Ended December 31, 2017
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,001		$	2,638		$	480		$	5	$	6,124		$	3,001		$	2,638		$	480		$	—	$	3,118
Derivatives income	(1		)	—			3,569			—		3,568			—			—			3,569			—		3,569
Other (3)	(3		)	1			—			9		7			(3		)	1			—			—		1
Eliminations	—			(33		)	(52		)	—		(85		)	—			(33		)	(52		)	—		(85		)
Total revenues	$	2,997		$	2,606		$	3,997		$	14	$	9,614		$	2,998		$	2,606		$	3,997		$	—	$	6,603
	Year Ended December 31, 2016
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,050		$	2,368		$	288		$	5	$	5,711		$	3,050		$	2,368		$	288		$	—	$	2,656
Derivatives income	1			—			1,811			—		1,812			—			—			1,811			—		1,811
Other (3)	9			41			—			10		60			9			41			—			1		42
Eliminations	—			(29		)	(26		)	—		(55		)	—			(29		)	(26		)	—		(55		)
Total revenues	$	3,060		$	2,380		$	2,073		$	15	$	7,528		$	3,059		$	2,380		$	2,073		$	1	$	4,454

(1) Reflected in Utility revenues in the Statements of Consolidated Income.

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(2) Reflected in Non-utility revenues in the Statements of Consolidated Income.

(3) Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

Revenues from Contracts with Customers

Electric Transmission & Distribution. Houston Electric distributes electricity to customers over time and customers consume the electricity when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the PUCT, is recognized as electricity is delivered and represents amounts both billed and unbilled. Discretionary services requested by customers are provided at a point in time with control transferring upon the completion of the service. Revenue for discretionary services is recognized upon completion of service based on the tariff rates set by the PUCT. Payments for electricity distribution and discretionary services are aggregated and received on a monthly basis. Houston Electric performs transmission services over time as a stand-ready obligation to provide a reliable network of transmission systems. Revenue is recognized upon time elapsed, and the monthly tariff rate set by the PUCT. Payments are received on a monthly basis.

Natural Gas Distribution. CERC distributes and transports natural gas to customers over time, and customers consume the natural gas when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the state governing agency for that service area, is recognized as natural gas is delivered and represents amounts both billed and unbilled. Discretionary services requested by the customer are satisfied at a point in time and revenue is recognized upon completion of service and the tariff rates set by the applicable state regulator. Payments of natural gas distribution, transportation and discretionary services are aggregated and received on a monthly basis.

Energy Services. The majority of CES natural gas sales contracts are considered a derivative, as the contracts typically have a stated minimum or contractual volume of delivery.

For contracts in which CES delivers the full requirement of the natural gas needed by the customer and a volume is not stated, a contract as defined under ASC 606 is created upon the customer’s exercise of its option to take natural gas. CES supplies natural gas to retail customers over time as customers consume the natural gas when delivered. For wholesale customers, CES supplies natural gas at a point in time because the wholesale customer is presumed to have storage capabilities. Control is transferred to both types of customers upon delivery of natural gas. Revenue is recognized on a monthly basis based on the estimated volume of natural gas delivered and the price agreed upon with the customer. Payments are received on a monthly basis.

AMAs are natural gas sales contracts under which CES also assumes management of a customer’s physical storage and/or transportation capacity. AMAs have two distinct performance obligations, which consist of natural gas sales and natural gas delivery because delivery could occur separate from the sale of natural gas (e.g., from storage to customer premises). Most AMAs’ natural gas sales performance obligations are accounted for as embedded derivatives. The transaction price is allocated between the sale of natural gas and the delivery based on the stand-alone selling price as stated in the contract. CES performs natural gas delivery over time as customers take delivery of the natural gas and recognizes revenue on an aggregated monthly basis based on the volume of natural gas delivered and the fees stated within the contract. Payments are received on a monthly basis.

Practical Expedients and Exemption. Sales taxes and other similar taxes collected from customers are excluded from the transaction price.

(6) Goodwill and Other Intangibles (CenterPoint Energy and CERC)

CenterPoint Energy’s and CERC’s goodwill by reportable segment as of both December 31, 2018 and 2017 is as follows:

	(in millions)
Natural Gas Distribution	$	746
Energy Services (1)	110
Other Operations	11
Total	$	867

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(1) Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

CenterPoint Energy and CERC perform goodwill impairment tests at least annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. The impairment evaluation for goodwill is performed by comparing the fair value of each reporting unit with the carrying amount of the reporting unit, including goodwill. The estimated fair value of the reporting unit is primarily determined on the basis of discounted cash flows. If the carrying amount is in excess of the estimated fair value of the reporting unit, then the excess amount is the impairment charge that should be recorded, not to exceed the carrying amount of goodwill. See Note 2(e) for further discussion.

CenterPoint Energy and CERC performed the annual goodwill impairment test in the third quarter of each of 2018 and 2017 and determined that no goodwill impairment charge was required for any reporting unit, which approximate the Registrants’ applicable reportable segments.

The tables below present information on CenterPoint Energy’s and CERC’s finite lived intangible assets recorded in Other non-current assets on the Consolidated Balance Sheets. Finite lived intangible assets are amortized over their estimated useful lives.

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
	(in millions)
Customer relationships	$	86	$	(27	)	$	59	$	86	$	(21	)	$	65
Covenants not to compete	4		(3		)	1		4		(2		)	2
Other	16		(11		)	5		15		(8		)	7
Total	$	106	$	(41	)	$	65	$	105	$	(31	)	$	74

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Amortization expense of intangible assets (1)	$	10	$	13	$	4

(1) Recorded in Depreciation and amortization expenses on CenterPoint Energy’s and CERC’s respective Statements of Consolidated Income.

CenterPoint Energy and CERC estimate that amortization expense of intangible assets with finite lives for the next five years will be as follows:

	Amortization Expense
	(in millions)
2019	$	11
2020	6
2021	6
2022	6
2023	5

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(7) Regulatory Accounting

The following is a list of regulatory assets and liabilities reflected on the Registrants’ respective Consolidated Balance Sheets as of December 31, 2018 and 2017:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Regulatory Assets:
Current regulatory assets (1)	$	77		$	—		$	77		$	130		$	—		$	130
Non-current regulatory assets:
Securitized regulatory assets	1,059			1,059			—			1,590			1,590			—
Unrecognized equity return (2)	(213		)	(213		)	—			(287		)	(287		)	—
Unamortized loss on reacquired debt	68			68			—			75			75			—
Pension and postretirement-related regulatory asset (3)	725			33			30			646			31			20
Hurricane Harvey restoration costs (4)	68			64			4			64			58			6
Regulatory assets related to TCJA (5)	33			23			10			48			33			15
Other long-term regulatory assets (6)	227			90			137			211			70			140
Total non-current regulatory assets	1,967			1,124			181			2,347			1,570			181
Total regulatory assets	2,044			1,124			258			2,477			1,570			311
Regulatory Liabilities:
Current regulatory liabilities (7)	38			17			21			24			22			2
Non-current regulatory liabilities:
Regulatory liabilities related to TCJA (5)	1,323			847			476			1,354			862			492
Estimated removal costs	886			269			617			878			285			593
Other long-term regulatory liabilities	316			182			134			232			116			116
Total non-current regulatory liabilities	2,525			1,298			1,227			2,464			1,263			1,201
Total regulatory liabilities	2,563			1,315			1,248			2,488			1,285			1,203
Total regulatory assets and liabilities, net	$	(519	)	$	(191	)	$	(990	)	$	(11	)	$	285		$	(892	)

(1) Current regulatory assets are included in Prepaid expenses and other current assets in the Registrants’ respective Consolidated Balance Sheets.

(2) The unrecognized equity return will be recognized as it is recovered in rates through 2024. During the years ended December 31, 2018, 2017 and 2016, Houston Electric recognized approximately $74 million, $42 million and $64 million, respectively, of the allowed equity return. The timing of Houston Electric’s recognition of the equity return will vary each period based on amounts actually collected during the period. The actual amounts recognized are adjusted at least annually to correct any over-collections or under-collections during the preceding 12 months.

(3) Includes a portion of Houston Electric’s and CERC’s NGD’s actuarially determined pension and other postemployment expense in excess of the amount being recovered through rates that is being deferred for rate making purposes, of which $33 million and $4 million as of December 31, 2018, respectively, and $31 million and $7 million as of December 31, 2017, respectively, were not earning a return.

(4) The Registrants suffered damage as a result of Hurricane Harvey, a major storm classified as a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale, that first struck the Texas coast on Friday, August 25, 2017 and remained over the Houston area for the next several days. The unprecedented flooding from torrential amounts of rainfall accompanying the storm caused significant damage to or destruction of residences and businesses served by the Registrants. The Registrants deferred the uninsured storm restoration costs as management believed it was probable that such costs will be recovered through traditional rate adjustment mechanisms for capital costs and through the next base rate proceeding for operation and maintenance expenses. As a result, storm restoration costs did not materially affect the Registrants’ reported net income for 2017. The Registrants are not earning a return on Hurricane Harvey restoration costs.

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(5) The EDIT and deferred revenues will be recovered or refunded to customers as required by tax and regulatory authorities. See Note 15 for additional information.

(6) Other long-term regulatory assets that are not earning a return were not material as of December 31, 2018 and 2017.

(7) Current regulatory liabilities are included in Other current liabilities in each of the Registrants’ respective Consolidated Balance Sheets.

(8) Stock-Based Incentive Compensation Plans and Employee Benefit Plans

(a) Stock-Based Incentive Compensation Plans (CenterPoint Energy)

CenterPoint Energy has LTIPs that provide for the issuance of stock-based incentives, including stock options, performance awards, restricted stock unit awards and restricted and unrestricted stock awards to officers, employees and non-employee directors.  Approximately 14 million shares of Common Stock are authorized under these plans for awards. CenterPoint Energy issues new shares of its Common Stock to satisfy stock-based payments related to LTIPs. Equity awards are granted to employees without cost to the participants.

Compensation costs for the performance and stock awards granted under LTIPs are measured using fair value and expected achievement levels on the grant date.  For performance awards with operational goals, the achievement levels are revised as goals are evaluated. The fair value of awards granted to employees is based on the closing stock price of CenterPoint Energy’s Common Stock on the grant date.  The compensation expense is recorded on a straight-line basis over the vesting period.  Forfeitures are estimated on the date of grant based on historical averages and estimates are updated periodically throughout the vesting period.  

The performance awards granted in 2018, 2017 and 2016 are distributed based upon the achievement of certain objectives over a three-year performance cycle. The stock unit awards granted in 2018, 2017 and 2016 are service based. The stock unit awards generally vest at the end of a three-year period, provided, however, that stock unit awards granted to non-employee directors vested at the end of a one-year period (for awards granted in 2017 and 2016) or vested immediately upon grant (for awards granted in 2018). Upon vesting, both the performance and stock awards are issued to the participants along with the value of dividend equivalents earned over the performance cycle or vesting period.

The following table summarizes CenterPoint Energy’s expenses related to LTIPs for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
LTIP Compensation expense (1)	$	26	$	21	$	19
Income tax benefit recognized	6		8		7
Actual tax benefit realized for tax deductions	5		6		5

(1) Included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income and not capitalized as a part of Inventory or Property, Plant and Equipment.

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The following tables summarize CenterPoint Energy’s LTIP activity for 2018:

	Year Ended December 31, 2018
	Shares (Thousands)		Weighted-Average Grant Date Fair Value		Remaining Average Contractual Life (Years)	Aggregate Intrinsic Value (2) (Millions)
Performance Awards(1)
Outstanding and non-vested as of December 31, 2017	3,627		$	22.15
Granted	1,321		26.74
Forfeited or canceled	(721	)	21.72
Vested and released to participants	(409	)	21.31
Outstanding and non-vested as of December 31, 2018	3,818		$	23.91	1	$	57
Stock Awards
Outstanding and non-vested as of December 31, 2017	980		$	22.68
Granted	409		26.62
Forfeited or canceled	(29	)	25.31
Vested and released to participants	(300	)	22.84
Outstanding and non-vested as of December 31, 2018	1,060		$	24.08	1.1	$	30

(1) Reflects maximum performance achievement.

(2) Reflects the impact of current expectations of achievement and stock price.

The weighted average grant date fair values per unit of awards granted were as follows for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(In millions, except for per unit amounts)
Performance Awards
Weighted-average grant date fair value per unit of awards granted	$	26.74	$	26.64	$	18.98
Total intrinsic value of awards received by participants	12		7		7
Vested grant date fair value	9		5		7
Stock Awards
Weighted-average grant date fair value per unit of awards granted	$	26.62	$	26.77	$	19.24
Total intrinsic value of awards received by participants	9		9		6
Vested grant date fair value	7		7		6

As of December 31, 2018, there was $27 million of total unrecognized compensation cost related to non-vested performance and stock awards which is expected to be recognized over a weighted-average period of 1.7 years.

(b) Pension Benefits (CenterPoint Energy)

CenterPoint Energy maintains a non-contributory qualified defined benefit pension plan covering substantially all employees, with benefits determined using a cash balance formula. Substantially all of the Registrants’ employees participate in CenterPoint Energy’s non-contributory qualified defined benefit plan. Under the cash balance formula, participants accumulate a retirement benefit based upon 5% of eligible earnings and accrued interest. Participants are 100% vested in their benefit after completing three years of service. In addition to the non-contributory qualified defined benefit pension plans, CenterPoint Energy maintains unfunded non-qualified benefit restoration plans which allow participants to receive the benefits to which they would have been entitled under CenterPoint Energy’s non-contributory qualified pension plan except for federally mandated limits on qualified plan benefits or on the level of compensation on which qualified plan benefits may be calculated.

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CenterPoint Energy’s net periodic cost includes the following components relating to pension, including the non-qualified benefit restoration plan:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Service cost (1)	$	37		$	36		$	38
Interest cost (2)	79			89			93
Expected return on plan assets (2)	(107		)	(97		)	(101		)
Amortization of prior service cost (2)	9			9			9
Amortization of net loss (2)	43			58			63
Net periodic cost	$	61		$	95		$	102

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

CenterPoint Energy used the following assumptions to determine net periodic cost relating to pension benefits:

	Year Ended December 31,
	2018		2017		2016
Discount rate	3.65	%	4.15	%	4.40	%
Expected return on plan assets	6.00		6.00		6.25
Rate of increase in compensation levels	4.45		4.50		4.15

In determining net periodic benefit cost, CenterPoint Energy uses fair value, as of the beginning of the year, as its basis for determining expected return on plan assets.

The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in the Consolidated Balance Sheets as well as the key assumptions of CenterPoint Energy’s pension plans. The measurement dates for plan assets and obligations were December 31, 2018 and 2017.

	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	2,225		$	2,197
Service cost	37			36
Interest cost	79			89
Benefits paid	(201		)	(168		)
Actuarial (gain) loss (1)	(127		)	71
Benefit obligation, end of year	2,013			2,225
Change in Plan Assets
Fair value of plan assets, beginning of year	1,801			1,656
Employer contributions	69			48
Benefits paid	(201		)	(168		)
Actual investment return	(153		)	265
Fair value of plan assets, end of year	1,516			1,801
Funded status, end of year	$	(497	)	$	(424	)

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	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(7	)	$	(7	)
Other liabilities-benefit obligations	(490		)	(417		)
Net liability, end of year	$	(497	)	$	(424	)
Actuarial Assumptions
Discount rate (2)	4.35		%	3.65		%
Expected return on plan assets (3)	6.00			6.00
Rate of increase in compensation levels	4.60			4.45
Interest crediting rate	3.75			3.75

(1) Significant sources of gain for 2018 include the increase in discount rate from 3.65% to 4.35% and the mortality projection scale change from MP2017 to MP2018. For 2017, the significant source of loss was the decrease in the discount rate from 4.15% to 3.65%.

(2) The discount rate assumption was determined by matching the projected cash flows of CenterPoint Energy’s plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

(3) The expected rate of return assumption was developed using the targeted asset allocation of CenterPoint Energy’s plans and the expected return for each asset class.

The following table displays pension benefits related to CenterPoint Energy’s pension plans that have accumulated benefit obligations in excess of plan assets:

	December 31,
	2018				2017
	Pension (Qualified)		Pension (Non-qualified)		Pension (Qualified)		Pension (Non-qualified)
	(in millions)
Accumulated benefit obligation	$	1,930	$	61	$	2,090	$	74
Projected benefit obligation	1,952		61		2,151		74
Fair value of plan assets	1,516		—		1,801		—

The accumulated benefit obligation for all defined benefit pension plans on CenterPoint Energy’s Consolidated Balance Sheets was $1,991 million and $2,164 million as of December 31, 2018 and 2017, respectively.

(c) Postretirement Benefits

CenterPoint Energy provides certain healthcare and life insurance benefits for retired employees on both a contributory and non-contributory basis. The Registrants’ employees who were hired before January 1, 2018 and who have met certain age and service requirements at retirement, as defined in the plans, are eligible to participate in these benefit plans. Employees hired on or after January 1, 2018 are not eligible for these benefits, except that employees represented by IBEW Local Union 66 are eligible to participate in certain of the benefits, subject to the applicable age and service requirements. With respect to retiree medical and prescription drug benefits, employees represented by the IBEW Local Union 66 who retire on or after January 1, 2017, and their dependents, receive any such benefits exclusively through the NECA/IBEW Family Medical Care Plan pursuant to the terms of the renegotiated collective bargaining agreement entered into in May 2016. Houston Electric and CERC are required to fund a portion of their obligations in accordance with rate orders. All other obligations are funded on a pay-as-you-go basis.

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Postretirement benefits are accrued over the active service period of employees. The net postretirement benefit cost includes the following components:

	Year Ended December 31,
	2018									2017									2016
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Service cost (1)	$	2		$	—		$	1		$	2		$	1		$	1		$	2		$	1		$	1
Interest cost (2)	13			8			4			16			9			5			16			10			4
Expected return on plan assets (2)	(5		)	(4		)	(1		)	(5		)	(4		)	(1		)	(6		)	(5		)	(1		)
Amortization of prior service cost (credit) (2)	(5		)	(5		)	1			(5		)	(6		)	1			(3		)	(4		)	—
Amortization of net loss (2)	—			—			—			—			—			—			1			1			1
Curtailment (3)	—			—			—			—			—			—			(5		)	(4		)	(1		)
Net postretirement benefit cost (credit)	$	5		$	(1	)	$	5		$	8		$	—		$	6		$	5		$	(1	)	$	4

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in each of the Registrants’ respective Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

(3) A curtailment gain or loss is required when the expected future services of a significant number of current employees are reduced or eliminated for the accrual of benefits. During 2016, postretirement healthcare benefits were amended resulting in a net curtailment gain of $5 million. In May 2016, Houston Electric entered into a renegotiated collective bargaining agreement with the IBEW Local Union 66 that provides that for Houston Electric bargaining unit employees covered under the agreement who retire on or after January 1, 2017, retiree medical and prescription drug coverage will be provided exclusively through the NECA/IBEW Family Medical Care Plan in exchange for the payment of monthly premiums as determined under the agreement. As a result, the accrued postretirement benefits related to such future CenterPoint Energy and Houston Electric union retirees were eliminated. Houston Electric recognized a curtailment gain of $3 million as an accelerated recognition of the prior service credit that would otherwise be recognized in future periods for the postretirement plan. CenterPoint Energy also recognized an additional curtailment gain of $2 million in October 2016 related to other amendments in the postretirement plan.

The following assumptions were used to determine net periodic cost relating to postretirement benefits:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Discount rate	3.60	%	3.60	%	3.60	%	4.15	%	4.15	%	4.15	%	4.35	%	4.35	%	4.35	%
Expected return on plan assets	4.55		4.75		3.85		4.50		4.75		3.60		4.80		5.00		3.95

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The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in consolidated balance sheets and the key assumptions of the postretirement plans. The measurement dates for plan assets and benefit obligations were December 31, 2018 and 2017.

	December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	386		$	225		$	109		$	383		$	217		$	115
Service cost	2			—			1			2			1			1
Interest cost	13			8			4			16			9			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actuarial (gain) loss (1)	(52		)	(56		)	1			4			10			(6		)
Benefit obligation, end of year	331			166			110			386			225			109
Change in Plan Assets
Fair value of plan assets, beginning of year	120			93			26			113			88			25
Employer contributions	14			9			4			16			10			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actual investment return	(2		)	(2		)	—			10			7			2
Fair value of plan assets, end of year	114			89			25			120			93			26
Funded status, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(6	)	$	—		$	(3	)	$	(6	)	$	—		$	(4	)
Other liabilities-benefit obligations	(211		)	(77		)	(82		)	(260		)	(132		)	(79		)
Net liability, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Actuarial Assumptions
Discount rate (2)	4.35		%	4.35		%	4.35		%	3.60		%	3.60		%	3.60		%
Expected return on plan assets (3)	4.60			4.70			4.15			4.55			4.75			3.85
Medical cost trend rate assumed for the next year - Pre-65	5.95			5.95			5.95			6.15			6.15			6.15
Medical/prescription drug cost trend rate assumed for the next year - Post-65	28.60			28.60			28.60			23.85			23.85			23.85
Prescription drug cost trend rate assumed for the next year - Pre-65	9.20			9.20			9.20			9.85			9.85			9.85
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50			4.50			4.50			4.50			4.50			4.50
Year that the cost trend rates reach the ultimate trend rate - Pre-65	2026			2026			2026			2026			2026			2026
Year that the cost trend rates reach the ultimate trend rate - Post-65	2027			2027			2027			2024			2024			2024

(1) Significant sources of gain for 2018 include the increase in the discount rate from 3.60% to 4.35%, favorable benefit claims experience and cost trend rates in addition to the change in mortality projection scale from MP2017 to MP2018.

(2) The discount rate assumption was determined by matching the projected cash flows of the plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

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(3) The expected rate of return assumption was developed using the targeted asset allocation of the plans and the expected return for each asset class.

(d) Accumulated Other Comprehensive Income (Loss) (CenterPoint Energy and CERC)

CenterPoint Energy recognizes the funded status of its pension plans and other postretirement plans on its Consolidated Balance Sheets. To the extent this obligation exceeds amounts previously recognized in the Statements of Consolidated Income, CenterPoint Energy records a regulatory asset for that portion related to its rate regulated utilities.  To the extent that excess liability does not relate to a rate regulated utility, the offset is recorded as a reduction to equity in accumulated other comprehensive income.

Amounts recognized in accumulated other comprehensive loss (gain) consist of the following:

	December 31,
	2018								2017
	Pension Benefits		Postretirement Benefits						Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy			CERC			CenterPoint Energy		CenterPoint Energy			CERC
	(in millions)
Unrecognized actuarial loss (gain)	$	109	$	(7	)	$	(3	)	$	94	$	(8	)	$	(2	)
Unrecognized prior service cost	1		5			5			1		6			6
Deferred tax benefit (1)	—		—			(9		)	—		—			(11		)
Net amount recognized in accumulated other comprehensive loss (gain)	$	110	$	(2	)	$	(7	)	$	95	$	(2	)	$	(7	)

(1) CenterPoint Energy’s and CERC’s postretirement benefit obligation is reduced by the impact of previously non-taxable government subsidies under the Medicare Prescription Drug Act. Because the subsidies were non-taxable, the temporary difference used in measuring the deferred tax impact was determined on the unrecognized losses excluding such subsidies.

The changes in plan assets and benefit obligations recognized in other comprehensive income during 2018 are as follows:

	Pension Benefits			Postretirement Benefits
	CenterPoint Energy			CenterPoint Energy		CERC
	(in millions)
Net loss (gain)	$	22		$	—	$	(1	)
Amortization of net loss	(6		)	—		—
Amortization of prior service cost	(1		)	—		(1		)
Total recognized in comprehensive income	$	15		$	—	$	(2	)
Total expense recognized in net periodic costs and Other comprehensive income	$	76		$	5	$	3

(e) Pension Plan Assets (CenterPoint Energy)

In managing the investments associated with the benefit plans, CenterPoint Energy’s objective is to achieve and maintain a fully funded plan.  This objective is expected to be achieved through an investment strategy that manages liquidity requirements while maintaining a long-term horizon in making investment decisions and efficient and effective management of plan assets.

As part of the investment strategy discussed above, CenterPoint Energy maintained the following weighted average allocation targets for its pension plans as of December 31, 2018:

U.S. equity	12 - 28%
International developed market equity	7 - 17%
Emerging market equity	5 - 11%
Fixed income	55 - 65%
Cash	0 - 2%

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The following tables set forth by level, within the fair value hierarchy (see Note 10), CenterPoint Energy’s pension plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018										2017
	(Level 1)			(Level 2)		(Level 3)		Total			(Level 1)			(Level 2)		(Level 3)		Total
	(in millions)
Cash	$	19		$	—	$	—	$	19		$	18		$	—	$	—	$	18
Corporate bonds:
Investment grade or above	—			368		—		368			—			432		—		432
Equity securities:
U.S. companies	60			—		—		60			76			—		—		76
Cash received as collateral from securities lending	77			—		—		77			76			—		—		76
U.S. treasuries	196			—		—		196			67			—		—		67
Mortgage backed securities	—			6		—		6			—			8		—		8
Asset backed securities	—			1		—		1			—			1		—		1
Municipal bonds	—			27		—		27			—			47		—		47
Mutual funds (2)	167			—		—		167			211			—		—		211
International government bonds	—			16		—		16			—			17		—		17
Obligation to return cash received as collateral from securities lending	(77		)	—		—		(77		)	(76		)	—		—		(76		)
Total investments at fair value	$	442		$	418	$	—	860			$	372		$	505	$	—	877
Investments measured by net asset value per share or its equivalent (1) (2)								656										924
Total Investments								$	1,516									$	1,801

(1) Represents investments in common collective trust funds.

(2) The amounts invested in mutual funds and common collective trust funds were allocated as follows:

	As of December 31,
	2018				2017
	Mutual Funds		Common Collective Trust Funds		Mutual Funds		Common Collective Trust Funds
International equities	51	%	37	%	57	%	34	%
Emerging market equities	34	%	4	%	30	%	5	%
U.S. equities	15	%	5	%	13	%	6	%
Fixed income	—		54	%	—		55	%

The pension plan utilized both exchange traded and over-the-counter financial instruments such as futures, interest rate options and swaps that were marked to market daily with the gains/losses settled in the cash accounts. The pension plan did not include any holdings of CenterPoint Energy Common Stock as of December 31, 2018 or 2017.

(f) Postretirement Plan Assets

In managing the investments associated with the postretirement plans, the Registrants’ objective is to achieve and maintain a fully funded plan.  This objective is expected to be achieved through an investment strategy that manages liquidity requirements while maintaining a long-term horizon in making investment decisions and efficient and effective management of plan assets.

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As part of the investment strategy discussed above, the Registrants maintained the following weighted average allocation targets for the postretirement plans as of December 31, 2018:

	CenterPoint Energy	Houston Electric	CERC
U.S. equity	13 - 23%	13 - 23%	15 - 25%
International developed market equity	3 - 13%	3 - 13%	2 - 12%
Fixed income	69 - 79%	69 - 79%	68 - 78%
Cash	0 - 2%	0 - 2%	0 - 2%

The following table presents mutual funds by level, within the fair value hierarchy, the Registrants’ postretirement plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018								2017
	Mutual Funds
	(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)		Total
	(in millions)
CenterPoint Energy	$	114	$	—	$	—	$	114	$	120	$	—	$	—	$	120
Houston Electric	89		—		—		89		93		—		—		93
CERC	25		—		—		25		26		—		—		26

The amounts invested in mutual funds were allocated as follows:

	As of December 31,
	2018						2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Fixed income	74	%	74	%	73	%	74	%	74	%	71	%
U.S. equities	19	%	19	%	21	%	18	%	18	%	21	%
International equities	7	%	7	%	6	%	8	%	8	%	8	%

(g) Benefit Plan Contributions

The Registrants made the following contributions in 2018 and expect to make the following minimum contributions in 2019 to the indicated benefit plans below:

	Contributions in 2018						Expected Minimum Contributions in 2019
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Qualified pension plan	$	60	$	—	$	—	$	86	$	—	$	—
Non-qualified pension plan	9		—		—		7		—		—
Postretirement benefit plan	14		9		4		17		10		4

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The following benefit payments are expected to be paid by the pension and postretirement benefit plans:

	Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	141	$	16	$	9	$	5
2020	146		19		10		6
2021	154		20		11		6
2022	155		21		11		7
2023	156		22		12		7
2024-2028	759		116		61		37

(h) Savings Plan

The Registrants participate in CenterPoint Energy’s tax-qualified employee savings plan that includes a cash or deferred arrangement under Section 401(k) of the Internal Revenue Code of 1986, as amended (the Code), and an employee stock ownership plan under Section 4975(e)(7) of the Code. Under the plan, participating employees may make pre-tax or Roth contributions up to 50%, and after tax contributions up to 16%, of their eligible compensation, not to exceed certain federally mandated limits. The Registrants match 100% of the first 6% of each employee’s compensation contributed. The matching contributions are fully vested at all times.

Effective January 1, 2016, the savings plan was amended to limit the percentage of future contributions that could be invested in Common Stock to 25% and to prohibit transfers of account balances where the transfer would result in more than 25% of a participant’s total account balance invested in Common Stock.

The savings plan has significant holdings of Common Stock. As of December 31, 2018, 12,062,915 shares of Common Stock were held by the savings plan, which represented approximately 16% of its investments. Given the concentration of the investments in Common Stock, the savings plan and its participants have market risk related to this investment.

CenterPoint Energy allocates to Houston Electric and CERC the savings plan benefit expense related to their respective employees. The following table summarizes the Registrants’ savings plan benefit expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Savings plan benefit  expenses	$	43	$	17	$	18	$	41	$	17	$	17	$	38	$	15	$	16

(i) Other Benefits Plans

The Registrants participate in CenterPoint Energy’s plan that provides postemployment benefits for certain former or inactive employees, their beneficiaries and covered dependents, after employment but before retirement (primarily healthcare and life insurance benefits for participants in the long-term disability plan).

The Registrants participate in CenterPoint Energy’s non-qualified deferred compensation plans that provide benefits payable to directors, officers and select employees or their designated beneficiaries at specified future dates or upon termination, retirement or death. Benefit payments are made from the general assets of the Registrants.

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Expenses related to other benefit plans were recorded as follows:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	3	$	4	$	1	$	6	$	1	$	4	$	5	$	3	$	3
Deferred compensation plans	3		1		—		3		1		—		3		1		—

Amounts related to other benefit plans were included in Benefit Obligations in the Registrants’ accompanying Consolidated Balance Sheets as follows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	11	$	3	$	7	$	20	$	3	$	14
Deferred compensation plans	42		9		3		45		10		3
Split-dollar life insurance arrangements	36		1		—		39		1		—

(j) Change in Control Agreements and Other Employee Matters

CenterPoint Energy has a change in control plan, which was amended and restated on May 1, 2017.  The plan generally provides, to the extent applicable, in the case of a change in control of CenterPoint Energy and covered termination of employment, for severance benefits of up to three times annual base salary plus bonus, and other benefits.  CenterPoint Energy officers, including the Executive Chairman, are participants under the plan.

As of December 31, 2018, the Registrants’ employees were covered by collective bargaining agreements as follows:

		Percentage of Employees Covered
	Agreement Expiration	CenterPoint Energy		Houston Electric		CERC
IBEW Local 66	May 2020	18	%	51	%	—
OPEIU Local 12 and Mankato	March and May 2021	3	%	—		3	%
Gas Workers Union Local 340	April 2020	6	%	—		12	%
IBEW Local 949	December 2020	3	%	—		7	%
USW Locals 13-227 and 13-1	June and July 2022	5	%	—		11	%
Total		35	%	51	%	33	%

(9) Derivative Instruments

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business.  The Registrants utilize derivative instruments such as physical forward contracts, swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows.

(a) Non-Trading Activities

Commodity Derivative Instruments. CenterPoint Energy and CERC, through CES, enter into certain derivative instruments to mitigate the effects of commodity price movements. Certain financial instruments used to hedge portions of the natural gas inventory of the Energy Services reportable segment are designated as fair value hedges for accounting purposes. All other financial instruments do not qualify or are not designated as cash flow or fair value hedges.

Weather Hedges. CenterPoint Energy and CERC have weather normalization or other rate mechanisms that mitigate the impact of weather on NGD in Arkansas, Louisiana, Mississippi, Minnesota and Oklahoma. CenterPoint Energy’s and CERC’s NGD and CenterPoint Energy’s electric operations in Texas do not have such mechanisms, although fixed customer charges are historically higher in Texas for NGD compared to its other jurisdictions. As a result, fluctuations from normal weather may have a positive

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or negative effect on CenterPoint Energy’s and CERC’s NGD’s results in Texas and on CenterPoint Energy’s electric operations’ results in its service territory.

CenterPoint Energy and CERC, as applicable, enter into winter season weather hedges from time to time for certain NGD jurisdictions and electric operations’ service territory to mitigate the effect of fluctuations from normal weather on results of operations and cash flows. These weather hedges are based on heating degree days at 10-year normal weather. Houston Electric does not enter into weather hedges.

The table below summarizes CenterPoint Energy’s and CERC’s weather hedge gain (loss) activity:

				Year Ended December 31,
Jurisdiction	Winter Season	Bilateral Cap		2018			2017			2016
		(in millions)
Certain NGD jurisdictions	2018 – 2019	$	9	$	—		$	—		$	—
Certain NGD jurisdictions	2017 – 2018	8		(2		)	—			—
Total CERC (1)				(2		)	—			—
Electric operations’ Texas service territory	2018 – 2019	8		—			—			—
Electric operations’ Texas service territory	2017 – 2018	9		(2		)	—			—
Electric operations’ Texas service territory	2016 – 2017	9		—			(1		)	1
Total CenterPoint Energy (1)				$	(4	)	$	(1	)	$	1

(1) Weather hedge gains (losses) are recorded in Revenues in the Statements of Consolidated Income.

Cash Flow Hedging of Interest Expense. From time to time, the Registrants enter into forward interest rate agreements with certain counterparties designated as cash flow hedges. The objective of these cash flow hedges is to reduce exposure to variability in cash flows related to interest payments on anticipated future fixed rate debt offerings or other exposure to variable rate debt. As of December 31, 2018 and 2017, the total outstanding notional amount of CenterPoint Energy’s and Houston Electric’s forward interest rate agreements related to cash flow hedges was $450 million and $-0-, respectively. The maximum length of time over which CenterPoint Energy and Houston Electric are exposed to the variability in future cash flows of the forecasted debt offerings is less than 12 months. For the impacts of cash flow hedges to accumulated other comprehensive income, see Note 13.

Economic Hedging of Interest Rate Risk. From time to time, the Registrants may enter into forward interest rate agreements with certain counterparties designated as economic hedges. The objective of these economic hedges is to offset any interest rate risk borne by one or more of the Registrants in connection with an anticipated future fixed rate debt offering or other exposure to variable rate debt. As of December 31, 2018 and 2017, the Registrants did not have any outstanding forward interest rate agreements related to economic hedges.

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(b) Derivative Fair Values and Income Statement Impacts

The following tables present information about derivative instruments and hedging activities. The first three tables provide a balance sheet overview of Derivative Assets and Liabilities as of December 31, 2018 and 2017, while the last three tables provide a breakdown of the related income statement impacts for the years ending December 31, 2018, 2017 and 2016.

Fair Value of Derivative Instruments
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Derivative Assets Fair Value		Derivative Liabilities Fair Value		Derivative Assets Fair Value		Derivative Liabilities Fair Value
		(in millions)
Derivatives designated as cash flow hedges:
Interest rate derivatives	Current Liabilities: Non-trading derivative liabilities	$	—	$	24	$	—	$	—
	Total Houston Electric	—		24		—		—
Derivatives designated as fair value hedges:
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	1		7		13		1
Derivatives not designated as hedging instruments:
Natural gas derivatives (1) (2) (3)	Current Assets: Non-trading derivative assets	103		3		114		4
Natural gas derivatives (1) (2) (3)	Other Assets: Non-trading derivative assets	38		—		44		—
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	62		173		38		78
Natural gas derivatives (1) (2) (3)	Other Liabilities: Non-trading derivative liabilities	16		25		9		24
	Total CERC	220		208		218		107
Indexed debt securities derivative	Current Liabilities	—		601		—		668
	Total CenterPoint Energy	$	220	$	833	$	218	$	775

(1) The fair value shown for natural gas contracts is comprised of derivative gross volumes totaling 1,674 Bcf or a net 140 Bcf long position and 1,795 Bcf or a net 224 Bcf long position as of December 31, 2018 and 2017, respectively.  Certain natural gas contracts hedge basis risk only and lack a fixed price exposure.

(2) Natural gas contracts are presented on a net basis in the Consolidated Balance Sheets as they are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due and causes derivative assets (liabilities) to be ultimately presented net in a liability (asset) account within the Consolidated Balance Sheets. The net of total non-trading natural gas derivative assets and liabilities is detailed in the Offsetting of Natural Gas Derivative Assets and Liabilities table below.

(3) Derivative Assets and Derivative Liabilities include no material amounts related to physical forward transactions with Enable.

Cumulative Basis Adjustment for Fair Value Hedges (CenterPoint Energy and CERC)
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item
		(in millions)
Hedged items in fair value hedge relationship:
Natural gas inventory	Current Assets: Natural gas inventory	$	57	$	1	$	80	$	14
Total CenterPoint Energy and CERC		$	57	$	1	$	80	$	14

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Offsetting of Natural Gas Derivative Assets and Liabilities (CenterPoint Energy and CERC)
	December 31, 2018									December 31, 2017
	Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)			Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)
	(in millions)
Current Assets: Non-trading derivative assets	$	166		$	(66	)	$	100		$	165		$	(55	)	$	110
Other Assets: Non-trading derivative assets	54			(16		)	38			53			(9		)	44
Current Liabilities: Non-trading derivative liabilities	(183		)	81			(102		)	(83		)	63			(20		)
Other Liabilities: Non-trading derivative liabilities	(25		)	20			(5		)	(24		)	20			(4		)
Total	$	12		$	19		$	31		$	111		$	19		$	130

(1) Gross amounts recognized include some derivative assets and liabilities that are not subject to master netting arrangements.

(2) The derivative assets and liabilities on the Consolidated Balance Sheets exclude accounts receivable or accounts payable that, should they exist, could be used as offsets to these balances in the event of a default.

Income Statement Impact of Hedge Accounting Activity (CenterPoint Energy and CERC)

	Year Ended December 31,
	2018			2017			2016
	Location and Amount of Gain (Loss) recognized in Income on Hedging Relationship (2)
	Non-utility natural gas expense
	(in millions)
Total amounts presented in the statements of income in which the effects of hedges are recorded	$	4,364		$	3,785		$	1,983
Gain (loss) on fair value hedging relationships:
Commodity contracts:
Hedged items - Natural gas inventory	(13		)	14			—
Derivatives designated as hedging instruments	13			(14		)	—
Amounts excluded from effectiveness testing recognized in earnings immediately (1)	(149		)	(67		)	70

(1) Upon adoption of ASU 2017-12 effective January 1, 2018 (see Note 2 for additional information), CenterPoint Energy and CERC elected to exclude from their assessment of hedge effectiveness the natural gas market price difference between locations of the hedged inventory and the delivery location specified in the hedge instruments. Prior to the adoption of this accounting guidance, the timing difference between the spot price and the futures price, as well as the difference between the timing of the settlement of the futures and the valuation of the underlying physical commodity, was excluded from the assessment of effectiveness for CenterPoint Energy’s and CERC’s existing fair value hedges and will continue to be excluded from the assessment of hedge effectiveness. CenterPoint Energy and CERC elected to continue to immediately recognize amounts excluded from hedge effectiveness in their respective Statements of Consolidated Income.

(2) Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for the Registrants for the years ended December 31, 2018, 2017 and 2016, respectively.

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		Year Ended December 31,
	Income Statement Location	2018			2017		2016
		(in millions)
Effects of derivatives not designated as hedging instruments on the income statement:
Commodity contracts	Gains (Losses) in Non-utility revenues	$	107		$	211	$	(18	)
Total CERC		107			211		(18		)
Indexed debt securities derivative	Gains (Losses) in Other Income (Expense)	(232		)	49		(413		)
Interest rate derivatives	Gains in Other Income (Expense)	2			—		—
Total CenterPoint Energy		$	(123	)	$	260	$	(431	)

(c) Credit Risk Contingent Features

CenterPoint Energy and CERC enter into financial derivative contracts containing material adverse change provisions. These provisions could require CenterPoint Energy or CERC to post additional collateral if the S&P or Moody’s credit ratings of CenterPoint Energy, Inc. or its subsidiaries, including CERC Corp., are downgraded.  

CenterPoint Energy and CERC

	December 31, 2018		December 31, 2017
	(in millions)
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position	$	1	$	2
Fair value of collateral already posted	—		—
Additional collateral required to be posted if credit risk contingent features triggered	—		2

(d) Credit Quality of Counterparties

In addition to the risk associated with price movements, credit risk is also inherent in CenterPoint Energy’s and CERC’s non-trading derivative activities. Credit risk relates to the risk of loss resulting from non-performance of contractual obligations by a counterparty. The following table shows the composition of counterparties to the non-trading derivative assets:

CenterPoint Energy and CERC
	December 31, 2018				December 31, 2017
	Investment Grade (1)		Total (3)		Investment Grade (1)		Total (3)
	(in millions)
Energy marketers	$	11	$	24	$	6	$	45
End users (2)	30		114		17		109
Total	$	41	$	138	$	23	$	154

(1) “Investment grade” is primarily determined using publicly available credit ratings and considers credit support (including parent company guarantees) and collateral (including cash and standby letters of credit). For unrated counterparties, CenterPoint Energy and CERC determine a synthetic credit rating by performing financial statement analysis and consider contractual rights and restrictions and collateral.

(2) End users are comprised primarily of customers who have contracted to fix the price of a portion of their physical gas requirements for future periods.

(3) The amounts reflected in the table above were not impacted by collateral netting.

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(10) Fair Value Measurements

Assets and liabilities that are recorded at fair value in the Registrants’ Consolidated Balance Sheets are categorized based upon the level of judgment associated with the inputs used to measure their value. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities, are as follows:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. The types of assets carried at Level 1 fair value generally are exchange-traded derivatives and equity securities, as well as natural gas inventory that has been designated as the hedged item in a fair value hedge.

Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets, and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets.  A market approach is utilized to value the Registrants’ Level 2 natural gas derivative assets or liabilities. CenterPoint Energy’s Level 2 indexed debt securities derivative is valued using an option model and a discounted cash flow model, which uses projected dividends on the ZENS-Related Securities and a discount rate as observable inputs.

Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Registrants’ judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Registrants develop these inputs based on the best information available, including the Registrants’ own data. A market approach is utilized to value the Registrants’ Level 3 assets or liabilities. As of December 31, 2018, CenterPoint Energy’s and CERC’s Level 3 assets and liabilities are comprised of physical natural gas forward contracts and options. Level 3 physical natural gas forward contracts and options are valued using a discounted cash flow model which includes illiquid forward price curve locations (ranging from $1.39 to $5.96 per MMBtu) as an unobservable input. CenterPoint Energy’s and CERC’s Level 3 physical natural gas forward contracts and options derivative assets and liabilities consist of both long and short positions (forwards and options). Forward price decreases (increases) as of December 31, 2018 would have resulted in lower (higher) values, respectively, for long forwards and options and higher (lower) values, respectively, for short forwards and options.

The Registrants determine the appropriate level for each financial asset and liability on a quarterly basis and recognize transfers between levels at the end of the reporting period.  

The following tables present information about the Registrants’ assets and liabilities (including derivatives that are presented net) measured at fair value on a recurring basis as of December 31, 2018 and December 31, 2017, and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value.

CenterPoint Energy

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	542	$	—	$	—	$	—		$	542	$	963	$	—	$	—	$	—		$	963
Investments, including money market funds (2)	66		—		—		—			66		68		—		—		—			68
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	609	$	173	$	47	$	(82	)	$	747	$	1,045	$	161	$	57	$	(64	)	$	1,199
Liabilities
Indexed debt securities derivative	$	—	$	601	$	—	$	—		$	601	$	—	$	—	$	668	$	—		$	668
Interest rate derivatives	24		—		—		—			24		—		—		—		—			—
Natural gas derivatives (3)(4)	—		191		17		(101		)	107		—		96		11		(83		)	24
Total liabilities	$	24	$	792	$	17	$	(101	)	$	732	$	—	$	96	$	679	$	(83	)	$	692

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Houston Electric

	December 31, 2018										December 31, 2017
	Level 1		Level 2		Level 3		Netting		Total		Level 1		Level 2		Level 3		Netting		Total
Assets	(in millions)
Investments, including money market funds (2)	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Total assets	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Liabilities
Interest rate derivatives	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—
Total liabilities	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—

CERC

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	2	$	—	$	—	$	—		$	2	$	3	$	—	$	—	$	—		$	3
Investments, including money market funds (2)	11		—		—		—			11		11		—		—		—			11
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	14	$	173	$	47	$	(82	)	$	152	$	28	$	161	$	57	$	(64	)	$	182
Liabilities
Natural gas derivatives (3)(4)	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24
Total liabilities	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24

(1) Amounts represent the impact of legally enforceable master netting arrangements that allow CenterPoint Energy and CERC to settle positive and negative positions and also include cash collateral of $19 million as of both December 31, 2018 and 2017, respectively, posted with the same counterparties.

(2) Amounts are included in Prepaid and Other Current Assets and Other Assets in the Consolidated Balance Sheets.

(3) Natural gas derivatives include no material amounts related to physical forward transactions with Enable.

(4) Level 1 natural gas derivatives include exchange-traded derivatives cleared by the CME, which deems that financial instruments cleared by the CME are settled daily in connection with posted cash payments. As a result of this exchange rule, CME-related derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are presented in Level 1 net of posted cash; however, the derivatives remain outstanding and subject to future commodity price fluctuations until they are settled in accordance with their contractual terms. Derivative transactions cleared on exchanges other than the CME (e.g., the Intercontinental Exchange or ICE) continue to be reported on a gross basis.

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The following table presents additional information about assets or liabilities, including derivatives that are measured at fair value on a recurring basis for which CenterPoint Energy and CERC have utilized Level 3 inputs to determine fair value:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy			CERC			CenterPoint Energy			CERC			CenterPoint Energy			CERC
	(in millions)
Beginning balance	$	(622	)	$	46		$	(704	)	$	13		$	12		$	12
Purchases (1)	—			—			—			—			12			12
Total gains (losses)	30			30			96			47			12			12
Total settlements	(39		)	(39		)	(11		)	(11		)	(27		)	(27		)
Transfers into Level 3 (2)	5			5			14			14			(712		)	5
Transfers out of Level 3 (3)	656			(12		)	(17		)	(17		)	(1		)	(1		)
Ending balance (4)	$	30		$	30		$	(622	)	$	46		$	(704	)	$	13
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date:
	$	18		$	18		$	87		$	38		$	(402	)	$	11

(1) Mark-to-market value of Level 3 derivative assets acquired through the purchase of AEM were less than $1 million at the acquisition date.

(2) During 2016, CenterPoint Energy transferred its indexed debt securities from Level 2 to Level 3 to reflect changes in the significance of the unobservable inputs used in the valuation.

(3) During 2018, CenterPoint Energy transferred its indexed debt securities derivative from Level 3 to Level 2 to reflect changes in the significance of the unobservable inputs used in the valuation.

(4) CenterPoint Energy and CERC did not have significant Level 3 sales during any of the years ended December 31, 2018, 2017 or 2016.

Items Measured at Fair Value on a Nonrecurring Basis

As of December 31, 2018 and 2017, there were no significant assets or liabilities measured at fair value on a nonrecurring basis.

Estimated Fair Value of Financial Instruments

The fair values of cash and cash equivalents, investments in debt and equity securities classified as “trading” and short-term borrowings are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below.  The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy.

	December 31, 2018						December 31, 2017
	CenterPoint Energy (1)		Houston Electric (1)		CERC		CenterPoint Energy (1)		Houston Electric (1)		CERC
Long-term debt, including current maturities	(in millions)
Carrying amount	$	9,140	$	4,717	$	2,371	$	8,679	$	4,753	$	2,457
Fair value	9,308		4,770		2,488		9,220		5,034		2,708

(1) Includes Securitization Bond debt.

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(11) Unconsolidated Affiliate (CenterPoint Energy and CERC)

CenterPoint Energy has the ability to significantly influence the operating and financial policies of Enable, a publicly traded MLP, and, accordingly, accounts for its investment in Enable’s common units using the equity method of accounting. Upon the adoption of ASU 2014-09 and ASU 2017-05 on January 1, 2018, CenterPoint Energy and CERC evaluated transactions in the investment in Enable that occurred prior to January 1, 2018 (the effective date) and concluded a cumulative effect adjustment to the opening balance of retained earnings was not required. See Note 2(r) for further discussion.

Enable is considered to be a VIE because the power to direct the activities that most significantly impact Enable’s economic performance does not reside with the holders of equity investment at risk. However, CenterPoint Energy is not considered the primary beneficiary of Enable since it does not have the power to direct the activities of Enable that are considered most significant to the economic performance of Enable. As of December 31, 2018, CenterPoint Energy’s maximum exposure to loss related to Enable is limited to the equity investment, its investment in Enable Series A Preferred Units and outstanding current accounts receivable from Enable.

On September 4, 2018, CERC entered into a Contribution Agreement, by and between CERC and CNP Midstream, a new subsidiary formed by CERC in June 2018, pursuant to which CERC contributed its equity investment in Enable consisting of Enable common units and its interests in Enable GP, to CNP Midstream (collectively, the Enable Contribution). Immediately following the Enable Contribution, CERC distributed all of its interest in CNP Midstream to Utility Holding, CERC’s sole stockholder and a wholly-owned subsidiary of CenterPoint Energy. Utility Holding then distributed all of its interest in CNP Midstream to CenterPoint Energy, its sole member (collectively with the Enable Contribution, the Internal Spin). CERC executed the Internal Spin to, among other things, enhance the access of CERC and CenterPoint Energy to low cost debt and equity through increased transparency and understandability of the financial statements, improve CERC’s credit quality by eliminating the exposure to Enable’s midstream business and provide clarity of internal reporting and performance metrics to enhance management’s decision making for CERC and CNP Midstream.

The Internal Spin has been accounted for under the guidance for transactions between entities under common control. As of September 4, 2018, CERC derecognized its investment in Enable at carrying value on the date of distribution of $2.4 billion, net of deferred income taxes of $974 million, and CNP Midstream recorded the net asset contribution from CERC at CERC’s carrying value. Neither CERC nor CNP Midstream recognized a gain or loss upon the distribution or contribution, respectively, of net assets involved in the Internal Spin. In connection with the Internal Spin, CenterPoint Energy, through Utility Holding, made a $600 million capital contribution to CERC, which was used by CERC to repay outstanding indebtedness that historically supported CERC’s legacy midstream assets. See Note 21 for further discussion.

As a result of the Internal Spin, CERC’s equity in earnings in Enable and related income taxes have been classified as discontinued operations in CERC’s Consolidated Financial Statements as detailed below.

Limited Partner Interest and Units Held in Enable (CenterPoint Energy and CERC):

	As of December 31,
	2018				2017
	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)
CenterPoint Energy (3)	54.0	%	233,856,623	14,520,000	54.1	%	233,856,623	14,520,000
OGE	25.6	%	110,982,805	—	25.7	%	110,982,805	—
Public unitholders	20.4	%	88,392,983	—	20.2	%	87,744,652	—

(1) Excludes the Enable Series A Preferred Units owned by CenterPoint Energy.

(2) The carrying amount of the Enable Series A Preferred Units, reflected as Preferred units - unconsolidated affiliate on CenterPoint Energy’s Consolidated Balance Sheets, was $363 million as of both December 31, 2018 and 2017. No impairment charges or adjustment to carrying value were made as no observable price changes were identified in the current or prior reporting periods. See Note 2(r) for further discussion.

(3) Prior to the Internal Spin on September 4, 2018 described above, CenterPoint Energy’s investment in Enable’s common units, excluding the Enable Series A Preferred Units held directly by CenterPoint Energy, was held indirectly through CERC.

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Generally, sales to any person or entity (including a series of sales to the same person or entity) of more than 5% of the aggregate of the common units CenterPoint Energy owns in Enable or sales to any person or entity (including a series of sales to the same person or entity) by OGE of more than 5% of the aggregate of the common units it owns in Enable are subject to mutual rights of first offer and first refusal set forth in Enable’s Agreement of Limited Partnership.

Interests Held in Enable GP (CenterPoint Energy and CERC):

CenterPoint Energy and OGE held the following interests in Enable GP as of both December 31, 2018 and 2017:

	Management  Rights (1)		Incentive Distribution Rights (2)
CenterPoint Energy (3)	50	%	40	%
OGE	50	%	60	%

(1) As of December 31, 2018, Enable is controlled jointly by CenterPoint Energy and OGE. Sale of CenterPoint Energy’s or OGE’s ownership interests in Enable GP to a third party is subject to mutual rights of first offer and first refusal, and CenterPoint Energy is not permitted to dispose of less than all of its interest in Enable GP.

(2) Enable is expected to pay a minimum quarterly distribution of $0.2875 per common unit on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates, within 60 days after the end of each quarter. If cash distributions to Enable’s unitholders exceed $0.330625 per common unit in any quarter, Enable GP will receive increasing percentages or incentive distributions rights, up to 50%, of the cash Enable distributes in excess of that amount. In certain circumstances Enable GP will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. To date, no incentive distributions have been made.

(3) CenterPoint Energy held the management rights and incentive distributions rights in Enable GP indirectly through CERC until the Internal Spin on September 4, 2018 described above.

Distributions Received from Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018				2017				2016
	Per Unit		Cash Distribution		Per Unit		Cash Distribution		Per Unit		Cash Distribution
	(in millions, except per unit amounts)
Enable common units (1)	$	0.9540	$	223	$	1.2720	$	297	$	1.2720	$	297
Total CERC			223				297				297
Enable common units (1)	0.3180		74		—		—		—		—
Enable Series A Preferred Units (2)	2.5000		36		2.5000		36		1.5417		22
Total CenterPoint Energy			$	333			$	333			$	319

(1) Reflects CERC’s ownership of Enable common units up to September 4, 2018 when CERC completed the Internal Spin. After such date, distributions from Enable were received directly by CenterPoint Energy.

(2) 2016 amounts represent the period from February 18, 2016 to December 31, 2016.

Transactions with Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018		2017		2016
CenterPoint Energy and CERC	(in millions)
Natural gas expenses, including transportation and storage costs	$	122	$	115	$	110
CenterPoint Energy
Reimbursement of transition services (1)	4		4		7

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(1) Represents amounts billed under the Transition Agreements for certain support services provided to Enable. Actual transition services costs are recorded net of reimbursement.

	December 31,
	2018		2017
CenterPoint Energy and CERC	(in millions)
Accounts payable for natural gas purchases from Enable	$	11	$	13
CenterPoint Energy
Accounts receivable for amounts billed for transition services	2		1

CERC’s continuing involvement with Enable subsequent to the Internal Spin is limited to its natural gas purchases from Enable.

Summarized consolidated income (loss) information for Enable is as follows:

	Year Ended December 31,
	2018			2017		2016
	(in millions)
Operating revenues	$	3,431		$	2,803	$	2,272
Cost of sales, excluding depreciation and amortization	1,819			1,381		1,017
Depreciation and amortization	398			366		338
Operating income	648			528		385
Net income attributable to Enable common units	485			400		290
Reconciliation of Equity in Earnings (Losses), net:
CenterPoint Energy’s interest	$	262		$	216	$	160
Basis difference amortization (1)	47			49		48
Loss on dilution, net of proportional basis difference recognition	(2		)	—		—
CenterPoint Energy’s equity in earnings, net	$	307		$	265	$	208

(1) Equity in earnings of unconsolidated affiliate includes CenterPoint Energy’s share of Enable earnings adjusted for the amortization of the basis difference of CenterPoint Energy’s original investment in Enable and its underlying equity in net assets of Enable. The basis difference is being amortized over approximately 30 years, the remaining average life of the assets to which the basis difference is attributed.

Summarized consolidated balance sheet information for Enable is as follows:

	December 31,
	2018			2017
	(in millions)
Current assets	$	449		$	416
Non-current assets	11,995			11,177
Current liabilities	1,615			1,279
Non-current liabilities	3,211			2,660
Non-controlling interest	38			12
Preferred equity	362			362
Enable partners’ equity	7,218			7,280
Reconciliation of Investment in Enable:
CenterPoint Energy’s ownership interest in Enable partners’ equity	$	3,896		$	3,935
CenterPoint Energy’s basis difference	(1,414		)	(1,463		)
CenterPoint Energy’s equity method investment in Enable	$	2,482		$	2,472

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Discontinued Operations (CERC):

The Internal Spin represents a significant strategic shift that has a material effect on CERC’s operations and financial results and, as a result, CERC’s distribution of its equity investment in Enable met the criteria for discontinued operations classification. CERC has no continuing involvement in the equity investment of Enable. Therefore, CERC’s equity in earnings and related income taxes have been classified as Income from discontinued operations, net of tax, in CERC’s Statements of Consolidated Income for the periods presented. CERC’s equity method investment and related deferred income tax liabilities have been classified as Investment in unconsolidated affiliate - discontinued operations and Deferred income taxes, net - discontinued operations, respectively, in CERC’s Consolidated Balance Sheets for the periods presented. The following table presents amounts included in Income from discontinued operations, net of tax in CERC’s Statements of Consolidated Income.

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Equity in earnings of unconsolidated affiliate, net	$	184	$	265	$	208
Income tax expense	46		104		81
Income from discontinued operations, net of tax	$	138	$	161	$	127

(12) Indexed Debt Securities (ZENS) and Securities Related to ZENS(CenterPoint Energy)

(a) Investment in Securities Related to ZENS

In 1995, CenterPoint Energy sold a cable television subsidiary to TW and received certain ZENS-Related Securities as partial consideration. A subsidiary of CenterPoint Energy holds shares of certain securities detailed in the table below, which are classified as trading securities and are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. Unrealized gains and losses resulting from changes in the market value of the ZENS-Related Securities are recorded in CenterPoint Energy’s Statements of Consolidated Income.

	Shares Held at December 31,
	2018	2017
AT&T Common	10,212,945	—
Charter Common	872,912	872,503
Time Common	—	888,392
TW Common	—	7,107,130

(b) ZENS

In September 1999, CenterPoint Energy issued ZENS having an original principal amount of $1 billion of which $828 million remained outstanding as of December 31, 2018. Each ZENS was originally exchangeable at the holder’s option at any time for an amount of cash equal to 95% of the market value of the reference shares of TW Common attributable to such note. The number and identity of the reference shares attributable to each ZENS are adjusted for certain corporate events.

On October 22, 2016, AT&T announced that it had entered into a definitive agreement to acquire TW in a stock and cash transaction. On February 15, 2017, TW shareholders approved the announced transaction with AT&T. The merger closed on June 14, 2018. CenterPoint Energy received $53.75 and 1.437 shares of AT&T Common for each share of TW Common held, resulting in cash proceeds of $382 million and 10,212,945 shares of AT&T Common. In accordance with the terms of the ZENS, CenterPoint Energy remitted $382 million to ZENS note holders in July 2018, which reduced the ZENS contingent principal amount. 

On November 26, 2017, Meredith announced that it had entered into a definitive merger agreement with Time. Pursuant to the merger agreement, upon closing of the merger, a subsidiary of Meredith would purchase for cash all outstanding Time Common shares for $18.50 per share. The transaction was consummated on January 31, 2018. CenterPoint Energy elected to make a reference share offer adjustment and distribute additional interest, if any, in accordance with the terms of its ZENS rather than electing to increase the early exchange ratio to 100%. CenterPoint Energy’s distribution of additional interest in connection with the reference share offer was proportionate to the percentage of eligible shares that were validly tendered by Time stockholders in Meredith’s tender offer. CenterPoint Energy received $18.50 for each share of Time Common held, resulting in cash proceeds of approximately

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$16 million. In accordance with the terms of the ZENS, CenterPoint Energy distributed additional interest of approximately $16 million to ZENS holders on March 6, 2018, which reduced the ZENS contingent principal amount.

As a result, CenterPoint Energy recorded the following during the year ended December 31, 2018 related to the events discussed above:

	Meredith/Time			AT&T/TW
	(in millions)
Cash payment to ZENS note holders	$	16		$	382
Indexed debt – reduction	(4		)	(95		)
Indexed debt securities derivative – reduction	(1		)	(45		)
Loss on indexed debt securities	$	11		$	242

CenterPoint Energy’s reference shares for each ZENS consisted of the following:

	December 31,
	2018	2017
	(in shares)
AT&T Common	0.7185	—
Charter Common	0.061382	0.061382
Time Common	—	0.0625
TW Common	—	0.5

CenterPoint Energy pays interest on the ZENS at an annual rate of 2% plus the amount of any quarterly cash dividends paid in respect of the reference shares attributable to the ZENS. The principal amount of ZENS is subject to being increased or decreased to the extent that the annual yield from interest and cash dividends on the reference shares is less than or more than 2.309%. The adjusted principal amount is defined in the ZENS instrument as “contingent principal.” At December 31, 2018, ZENS having an original principal amount of $828 million and a contingent principal amount of $93 million were outstanding and were exchangeable, at the option of the holders, for cash equal to 95% of the market value of reference shares deemed to be attributable to the ZENS. As of December 31, 2018, the market value of such shares was approximately $540 million, which would provide an exchange amount of $620 for each $1,000 original principal amount of ZENS. At maturity of the ZENS in 2029, CenterPoint Energy will be obligated to pay in cash the higher of the contingent principal amount of the ZENS or an amount based on the then-current market value of the reference shares, which will include any additional publicly-traded securities distributed with respect to the current reference shares prior to maturity.

The ZENS obligation is bifurcated into a debt component and a derivative component (the holder’s option to receive the appreciated value of the reference shares at maturity). The bifurcated debt component accretes through interest charges annually up to the contingent principal amount of the ZENS in 2029. Such accretion will be reduced by annual cash interest payments, as described above. The derivative component is recorded at fair value and changes in the fair value of the derivative component are recorded in CenterPoint Energy’s Statements of Consolidated Income. Changes in the fair value of the ZENS-Related Securities held by CenterPoint Energy are expected to substantially offset changes in the fair value of the derivative component of the ZENS.

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The following table sets forth summarized financial information regarding CenterPoint Energy’s investment in ZENS-Related Securities and each component of CenterPoint Energy’s ZENS obligation. 

	ZENS-Related Securities			Debt Component of ZENS			Derivative Component of ZENS
	(in millions)
Balance as of December 31, 2015	$	805		$	145		$	442
Accretion of debt component of ZENS	—			26			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(178		)	—			—
Distribution to ZENS holders	—			(40		)	(21		)
Loss on indexed debt securities	—			—			296
Gain on ZENS-Related Securities	326			—			—
Balance as of December 31, 2016	953			114			717
Accretion of debt component of ZENS	—			27			—
2% interest paid	—			(17		)	—
Distribution to ZENS holders	—			(2		)	—
Gain on indexed debt securities	—			—			(49		)
Gain on ZENS-Related Securities	7			—			—
Balance as of December 31, 2017	960			122			668
Accretion of debt component of ZENS	—			21			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(398		)	—			—
Distribution to ZENS holders	—			(102		)	(46		)
Gain on indexed debt securities	—			—			(21		)
Loss on ZENS-Related Securities	(22		)	—			—
Balance as of December 31, 2018	$	540		$	24		$	601

(13) Equity(CenterPoint Energy)

Dividends Declared

CenterPoint Energy declared dividends on its Common Stock during 2018, 2017 and 2016 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
December 12, 2018	February 21, 2019	March 14, 2019	$	0.2875	$	144
October 23, 2018	November 15, 2018	December 13, 2018	0.2775		139
July 26, 2018	August 16, 2018	September 13, 2018	0.2775		120
April 26, 2018	May 17, 2018	June 14, 2018	0.2775		120
Total 2018			$	1.1200	$	523
December 13, 2017	February 15, 2018	March 8, 2018	$	0.2775	$	120
October 25, 2017	November 16, 2017	December 8, 2017	0.2675		116
July 27, 2017	August 16, 2017	September 8, 2017	0.2675		115
April 27, 2017	May 16, 2017	June 9, 2017	0.2675		115
January 5, 2017	February 16, 2017	March 10, 2017	0.2675		115
Total 2017			$	1.3475	$	581

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Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
October 27, 2016	November 16, 2016	December 9, 2016	$	0.2575	$	111
July 28, 2016	August 16, 2016	September 9, 2016	0.2575		111
April 28, 2016	May 16, 2016	June 10, 2016	0.2575		111
January 20, 2016	February 16, 2016	March 10, 2016	0.2575		110
Total 2016			$	1.0300	$	443

CenterPoint Energy declared dividends on its Series A Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	32.1563	$	26
Total 2018			$	32.1563	$	26

CenterPoint Energy declared dividends on its Series B Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	17.5000	$	17
October 23, 2018	November 15, 2018	December 1, 2018	11.6667		11
Total 2018			$	29.1667	$	28

There were no Series A Preferred Stock or Series B Preferred Stock outstanding or dividends declared in 2017 and 2016.

Dividend Requirement on Preferred Stock

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Series A Preferred Stock	$	18	$	—	$	—
Series B Preferred Stock	17		—		—
Total preferred stock dividend requirement	$	35	$	—	$	—

Series A Preferred Stock

On August 22, 2018, CenterPoint Energy completed the issuance of 800,000 shares of its Series A Preferred Stock, at a price of $1,000 per share, resulting in net proceeds of $790 million after issuance costs. The aggregate liquidation value of the Series A Preferred Stock is $800 million with a per share liquidation value of $1,000.

CenterPoint Energy used the net proceeds from the Series A Preferred Stock offering to fund a portion of the Merger and to pay related fees and expenses.

Dividends. The Series A Preferred Stock accrue cumulative dividends, calculated as a percentage of the stated amount per share, at a fixed annual rate of 6.125% per annum to, but excluding, September 1, 2023, and at an annual rate of three-month LIBOR plus a spread of 3.270% thereafter to be paid in cash if, when and as declared. If declared, prior to September 1, 2023, dividends are payable semi-annually in arrears on each March 1 and September 1, beginning on March 1, 2019, and, for the period commencing on September 1, 2023, dividends are payable quarterly in arrears each March 1, June 1, September 1 and December 1, beginning on December 1, 2023. Cumulative dividends earned during the applicable periods are presented on CenterPoint Energy’s Statements of Consolidated Income as Preferred stock dividend requirement.

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Optional Redemption. On or after September 1, 2023, CenterPoint Energy may, at its option, redeem the Series A Preferred Stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $1,000 per share, plus any accumulated and unpaid dividends thereon to, but excluding, the redemption date.

At any time within 120 days after the conclusion of any review or appeal process instituted by CenterPoint Energy, if any, following the occurrence of a ratings event, CenterPoint Energy may, at its option, redeem the Series A Preferred Stock in whole, but not in part, at a redemption price in cash per share equal to $1,020 (102% of the liquidation value of $1,000) plus an amount equal to all accumulated and unpaid dividends thereon to, but excluding, the redemption date, whether or not declared.

Ranking. The Series A Preferred Stock, with respect to anticipated dividends and distributions upon CenterPoint Energy’s liquidation or dissolution, or winding-up of CenterPoint Energy’s affairs, ranks or will rank:

• senior to Common Stock and to each other class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is expressly made subordinated to the Series A Preferred Stock;

• on a parity with any class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is not expressly made senior or subordinated to the Series A Preferred Stock, including the Series B Preferred Stock;

• junior to any class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is expressly made senior to the Series A Preferred Stock;

• junior to all existing and future indebtedness (including indebtedness outstanding under CenterPoint Energy’s credit facilities, senior notes and commercial paper) and other liabilities with respect to assets available to satisfy claims against CenterPoint Energy; and

• structurally subordinated to any existing and future indebtedness and other liabilities of CenterPoint Energy’s subsidiaries and capital stock of CenterPoint Energy’s subsidiaries held by third parties.

Voting Rights. Holders of the Series A Preferred Stock generally will not have voting rights. Whenever dividends on shares of Series A Preferred Stock have not been declared and paid for the equivalent of three or more semi-annual or six or more quarterly dividend periods (including, for the avoidance of doubt, the dividend period beginning on, and including, the original issue date and ending on, but excluding, March 1, 2019), whether or not consecutive, the holders of such shares of Series A Preferred Stock, voting together as a single class with holders of any and all other series of voting preferred stock (as defined in the Statement of Resolution for the Series A Preferred Stock) then outstanding, will be entitled at CenterPoint Energy’s next annual or special meeting of shareholders to vote for the election of a total of two additional members of CenterPoint Energy’s Board of Directors, subject to certain limitations. This right will terminate if and when all accumulated dividends have been paid in full and, upon such termination, the term of office of each director so elected will terminate at such time and the number of directors on CenterPoint Energy’s Board of Directors will automatically decrease by two, subject to the revesting of such rights in the event of each subsequent nonpayment.

Series B Preferred Stock

On October 1, 2018, CenterPoint Energy completed the issuance of 19,550,000 depositary shares, each representing a 1/20th interest in a share of its Series B Preferred Stock, at a price of $50 per depositary share, resulting in net proceeds of $950 million after issuance costs. The aggregate liquidation value of Series B Preferred Stock is $978 million with a per share liquidation value of $1,000. The amount issued included 2,550,000 depositary shares issued pursuant to the exercise in full of the option granted to the underwriters to purchase additional depositary shares.

CenterPoint Energy used the net proceeds from the offering of depositary shares, each representing a 1/20th interest in a share of its Series B Preferred Stock, to fund a portion of the Merger and to pay related fees and expenses.

Dividends. Dividends on the Series B Preferred Stock will be payable on a cumulative basis when, as and if declared at an annual rate of 7.00% on the liquidation value of $1,000 per share. CenterPoint Energy may pay declared dividends in cash or, subject to certain limitations, in shares of Common Stock, or in any combination of cash and shares of Common Stock on March 1, June 1, September 1 and December 1 of each year, commencing on December 1, 2018 and ending on, and including, September 1, 2021. Cumulative dividends earned during the applicable periods are presented on CenterPoint Energy’s Statements of Consolidated Income as Preferred stock dividend requirement.

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Mandatory Conversion. Unless earlier converted or redeemed, each share of the Series B Preferred Stock will automatically convert on the mandatory conversion date, which is expected to be September 1, 2021, into not less than 30.5820 and not more than 36.6980 shares of Common Stock, subject to certain anti-dilution adjustments. Correspondingly, the conversion rate per depositary share will be not less than 1.5291 and not more than 1.8349 shares of Common Stock, subject to certain anti-dilution adjustments. The conversion rate will be determined based on a preceding 20-day volume-weighted-average-price of Common Stock.

The following table illustrates the conversion rate per share of the Series B Preferred Stock, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Share of Series B Preferred Stock
Greater than $32.6990 (threshold appreciation price)	30.5820 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 30.5820 and 36.6980 shares of Common Stock, determined by dividing $1,000 by the applicable market value
Less than $27.2494 (initial price)	36.6980 shares of Common Stock

The following table illustrates the conversion rate per depositary share, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Depository Share
Greater than $32.6990 (threshold appreciation price)	1.5291 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 1.5291 and 1.8349 shares of Common Stock, determined by dividing $50 by the applicable market value
Less than $27.2494 (initial price)	1.8349 shares of Common Stock

Optional Conversion of the Holder. Other than during a fundamental change conversion period, and unless CenterPoint Energy has redeemed the Series B Preferred Stock, a holder of the Series B Preferred Stock may, at any time prior to September 1, 2021, elect to convert such holder’s shares of the Series B Preferred Stock, in whole or in part, at the minimum conversion rate of 30.5820 shares of Common Stock per share of the Series B Preferred Stock (equivalent to 1.5291 shares of Common Stock per depositary share), subject to certain anti-dilution and other adjustments. Because each depositary share represents a 1/20th fractional interest in a share of the Series B Preferred Stock, a holder of depositary shares may convert its depositary shares only in lots of 20 depositary shares.

Fundamental Change Conversion. If a fundamental change occurs on or prior to September 1, 2021, holders of the Series B Preferred Stock will have the right to convert their shares of the Series B Preferred Stock, in whole or in part, into shares of Common Stock at the fundamental change conversion rate during the period beginning on, and including, the effective date of such fundamental change and ending on, and including, the date that is 20 calendar days after such effective date (or, if later, the date that is 20 calendar days after holders receive notice of such fundamental change, but in no event later than September 1, 2021). Holders who convert shares of the Series B Preferred Stock during that period will also receive a make-whole dividend amount comprised of a fundamental change dividend make-whole amount, and to the extent there is any, the accumulated dividend amount. Because each depositary share represents a 1/20th fractional interest in a share of the Series B Preferred Stock, a holder of depositary shares may convert its depositary shares upon a fundamental change only in lots of 20 depositary shares.

Ranking. The Series B Preferred Stock, with respect to anticipated dividends and distributions upon CenterPoint Energy’s liquidation or dissolution, or winding-up of CenterPoint Energy’s affairs, ranks or will rank:

• senior to Common Stock and to each other class or series of capital stock established after the initial issue date of the Series B Preferred Stock that is expressly made subordinated to the Series B Preferred Stock;

• on a parity with the Series A Preferred Stock and any class or series of capital stock established after the initial issue date that is not expressly made senior or subordinated to the Series B Preferred Stock;

• junior to any class or series of capital stock established after the initial issue date that is expressly made senior to the Series B Preferred Stock;

• junior to all existing and future indebtedness (including indebtedness outstanding under CenterPoint Energy’s credit facilities, senior notes and commercial paper) and other liabilities with respect to assets available to satisfy claims against CenterPoint Energy; and

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• structurally subordinated to any existing and future indebtedness and other liabilities of CenterPoint Energy’s subsidiaries and capital stock of CenterPoint Energy’s subsidiaries held by third parties.

Voting Rights. Holders of the Series B Preferred Stock generally will not have voting rights. Whenever dividends on shares of the Series B Preferred Stock have not been declared and paid for six or more dividend periods (including, for the avoidance of doubt, the dividend period beginning on, and including, the initial issue date and ending on, but excluding, December 1, 2018), whether or not consecutive, the holders of such shares of Series B Preferred Stock, voting together as a single class with holders of any and all other series of voting preferred stock then outstanding (as defined in the Statement of Resolution for the Series B Preferred Stock), will be entitled at CenterPoint Energy’s next annual or special meeting of shareholders to vote for the election of a total of two additional members of CenterPoint Energy’s Board of Directors, subject to certain limitations. This right will terminate if and when all accumulated and unpaid dividends have been paid in full and, upon such termination, the term of office of each director so elected will terminate at such time and the number of directors on CenterPoint Energy’s Board of Directors will automatically decrease by two, subject to the revesting of such rights in the event of each subsequent nonpayment.

Common Stock

On October 1, 2018, CenterPoint Energy completed the issuance of 69,633,027 shares of Common Stock at a price of $27.25 per share, for net proceeds of $1,844 million after issuance costs. The amount issued included 9,082,568 shares of Common Stock issued pursuant to the exercise in full of the option granted to the underwriters to purchase additional shares of Common Stock.

CenterPoint Energy used the net proceeds from the Common Stock offering to fund a portion of the Merger and to pay related fees and expenses.

Undistributed Retained Earnings

As of December 31, 2018 and 2017, CenterPoint Energy’s consolidated retained earnings balance includes undistributed earnings from Enable of $31 million and $-0-, respectively.

Accumulated Other Comprehensive Income (Loss)

Changes in accumulated comprehensive income (loss) are as follows:

	Year Ended December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Beginning Balance	$	(68	)	$	—		$	6		$	(71	)	$	1		$	3
Other comprehensive income (loss) before reclassifications:
Remeasurement of pension and other postretirement plans	(19		)	—			1			4			—			7
Deferred loss from interest rate derivatives (1)	(19		)	(18		)	(1		)	(5		)	(1		)	(2		)
Amounts reclassified from accumulated other comprehensive loss:
Prior service cost (2)	1			—			1			1			—			1
Actuarial losses (2)	6			—			—			7			—			—
Tax benefit (expense)	6			4			(1		)	(4		)	—			(3		)
Net current period other comprehensive income (loss)	(25		)	(14		)	—			3			(1		)	3
Adoption of ASU 2018-02	(15		)	—			(1		)	—			—			—
Ending Balance	$	(108	)	$	(14	)	$	5		$	(68	)	$	—		$	6

(1) Gains and losses are reclassified from Accumulated other comprehensive income into income when the hedged transactions affect earnings. The reclassification amounts are included in Interest and other finance charges in each of the Registrant’s respective Statements of Consolidated Income. Amounts are less than $1 million for each of the years ended December 31, 2018 and 2017, respectively.

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(2) Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

(14) Short-term Borrowings and Long-term Debt

	December 31, 2018					December 31, 2017
	Long-Term			Current (1)		Long-Term			Current (1)
	(in millions)
CERC (2):
Short-term borrowings:
Inventory financing (3)	$	—		$	—	$	—		$	39
Total short-term borrowings	—			—		—			39
Long-term debt:
Senior notes 3.55% to 6.625% due 2021 to 2047	2,193			—		1,593			—
Commercial paper (4)	210			—		898			—
Unamortized debt issuance costs	(15		)	—		(12		)	—
Unamortized discount and premium, net	(17		)	—		(22		)	—
Total CERC long-term debt	2,371			—		2,457			—
Total CERC debt	2,371			—		2,457			39
Houston Electric:
First mortgage bonds 9.15% due 2021	102			—		102			—
General mortgage bonds 1.85% to 6.95% due 2021 to 2048	3,212			—		2,812			—
Restoration Bond Company:
System restoration bonds 4.243% due 2022	197			59		256			56
Bond Company II:
Transition bonds 5.302% due 2019	—			208		208			194
Bond Company III:
Transition bonds 5.234% due 2020	29			56		85			53
Bond Company IV:
Transition bonds 2.161% to 3.028% due 2020 to 2024	753			135		888			131
Unamortized debt issuance costs	(24		)	—		(22		)	—
Unamortized discount and premium, net	(11		)	—		(10		)	—
Total Houston Electric debt	4,258			458		4,319			434
CenterPoint Energy:
ZENS due 2029 (5)	—			24		—			122
Senior notes 2.50% to 4.25% due 2021 to 2028	2,000			—		500			—
Pollution control bonds 5.125% due 2028 (6)	68			—		68			50
Commercial paper (4)	—			—		855			—
Unamortized debt issuance costs	(13		)	—		(4		)	—
Unamortized discount and premium, net	(2		)	—		—			—
Total CenterPoint Energy long-term debt	8,682			482		8,195			606
Total CenterPoint Energy debt	$	8,682		$	482	$	8,195		$	645

(1) Includes amounts due or exchangeable within one year of the date noted.

(2) Issued by CERC Corp.

(3) CenterPoint Energy’s and CERC’s NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third-party AMAs in Arkansas, Louisiana and Oklahoma

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expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost.

(4) Classified as long-term debt because the termination date of the facility that backstops the commercial paper is more than one year from the date noted.

(5) CenterPoint Energy’s ZENS obligation is bifurcated into a debt component and an embedded derivative component. For additional information regarding ZENS, see Note 12(b). As ZENS are exchangeable for cash at any time at the option of the holders, these notes are classified as a current portion of long-term debt.

(6) $68 million and $118 million of these series of debt were secured by general mortgage bonds of Houston Electric as of December 31, 2018 and 2017, respectively.

Long-term Debt

Debt Retirements. During the year ended December 31, 2018, CenterPoint Energy retired the following debt instrument at maturity:

Registrant	Retirement Date	Debt Instrument	Aggregate Principal Amount (1)		Interest Rate	Maturity Date
			(in millions)
CenterPoint Energy	November 2018	Pollution control bonds	$	50	5.050%	2018

(1) Secured by general mortgage bonds of Houston Electric.

Debt Issuances. During the year ended December 31, 2018 and in January 2019, the Registrants issued the following debt instruments:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Interest Rate	Maturity Date
			(in millions)
Houston Electric (1)	February 2018	General mortgage bonds	$	400	3.95%	2048
CERC (1) (2)	March 2018	Unsecured senior notes	300		3.55%	2023
CERC (1) (2)	March 2018	Unsecured senior notes	300		4.00%	2028
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.60%	2021
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.85%	2024
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		4.25%	2028
Houston Electric (1)	January 2019	General mortgage bonds	700		4.25%	2049

(1) Proceeds from these debt issuances were used for general limited liability company and corporate purposes, as applicable, including capital expenditures, repayment of portions of outstanding commercial paper and borrowings under CenterPoint Energy’s money pool.

(2) Issued by CERC Corp.

(3) Proceeds from these debt issuances were used to fund a portion of the Merger and to pay related fees and expenses.

Securitization Bonds. As of December 31, 2018, CenterPoint Energy and Houston Electric had special purpose subsidiaries consisting of the Bond Companies, which they consolidate. The consolidated special purpose subsidiaries are wholly-owned, bankruptcy remote entities that were formed solely for the purpose of purchasing and owning transition or system restoration property through the issuance of transition bonds or system restoration bonds and activities incidental thereto. These Securitization Bonds are payable only through the imposition and collection of “transition” or “system restoration” charges, as defined in the Texas Public Utility Regulatory Act, which are irrevocable, non-bypassable charges to provide recovery of authorized qualified costs. CenterPoint Energy and Houston Electric have no payment obligations in respect of the Securitization Bonds other than to remit the applicable transition or system restoration charges they collect as set forth in servicing agreements among Houston

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Electric, the Bond Companies and other parties. Each special purpose entity is the sole owner of the right to impose, collect and receive the applicable transition or system restoration charges securing the bonds issued by that entity. Creditors of CenterPoint Energy or Houston Electric have no recourse to any assets or revenues of the Bond Companies (including the transition and system restoration charges), and the holders of Securitization Bonds have no recourse to the assets or revenues of CenterPoint Energy or Houston Electric.

Credit Facilities. In April 2018, CenterPoint Energy obtained commitments by lenders to provide a $5 billion Bridge Facility to provide flexibility for the timing of the long-term acquisition financing and fund, in part, amounts payable by CenterPoint Energy in connection with the Merger. In May 2018, CenterPoint Energy entered into an amendment to its revolving credit facility to increase the aggregate commitments from $1.7 billion to $3.3 billion effective the earlier of (i) the termination of all commitments by certain lenders to provide the Bridge Facility and (ii) the payment in full of all obligations (other than contingent obligations) under the Bridge Facility and termination of all commitments to advance additional credit thereunder, and in each case, so long as the Merger Agreement has not been terminated pursuant to the terms thereof without consummation of the Merger. This increase to CenterPoint Energy’s revolving credit facility will automatically expire on the termination date of the revolving credit facility. In addition, the amendment provided for a temporary increase on the maximum ratio of debt for borrowed money to capital from 65% to 75% until the earlier of (i) June 30, 2019 and (ii) the termination of all commitments in respect of the Bridge Facility without any borrowing thereunder. On October 5, 2018, CenterPoint Energy terminated all remaining commitments by lenders to provide the Bridge Facility. As a result, the aggregate commitments under the revolving credit facility automatically increased from $1.7 billion to $3.3 billion and the maximum ratio of debt for borrowed money to capital reverted to 65%.

As of December 31, 2018 and 2017, the Registrants had the following revolving credit facilities and utilization of such facilities:

	December 31, 2018										December 31, 2017
	Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate		Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate
	(in millions, except weighted average interest rate)
CenterPoint Energy	$	3,300	$	—	$	6	$	—	—		$	1,700	$	—	$	6	$	855	1.88	%
Houston Electric	300		—		4		—		—		300		—		4		—		—
CERC (1)	900		—		1		210		2.93	%	900		—		1		898		1.72	%
Total	$	4,500	$	—	$	11	$	210			$	2,900	$	—	$	11	$	1,753

(1) Issued by CERC Corp.

In January 2019, CenterPoint Energy issued the following commercial paper in connection with the closing of the Merger:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Weighted Average Interest Rate
			(in millions)
CenterPoint Energy (1) (2)	January 2019	Commercial paper	$	1,660	2.88%

(1) Proceeds from these commercial paper issuances were used to fund a portion of the Merger and to pay related fees and expenses and were contributed to Vectren for its payment of its stub period cash dividend, long-term incentive payments and to fund the repayment of indebtedness of Vectren subsidiaries redeemed at the option of the holder as a result of the closing of the Merger.

(2) The commercial paper notes were issued at various times in January 2019 with maturities up to and including 90 days as of the time of issuance, and, prior to their use as described in connection with the closing of the Merger, the net proceeds of such issuances were invested in short-term investments.

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Execution  Date	Registrant	Size of Facility			Draw Rate of LIBOR plus (1)	Financial Covenant Limit on Debt for Borrowed Money to Capital Ratio (2)	Debt for Borrowed Money to Capital Ratio as of December 31, 2018 (3)	Termination  Date (4)
		(in millions)
March 3, 2016	CenterPoint Energy	$	3,300	(5)	1.250%	65%	44.9%	March 3, 2022
March 3, 2016	Houston Electric	300			1.125%	65%	49.2%	March 3, 2022
March 3, 2016	CERC (6)	900			1.125%	65%	46.8%	March 3, 2022

(1) Based on credit ratings as of December 31, 2018.

(2) For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase from 65% to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification.

(3) As defined in the revolving credit facility agreement, excluding Securitization Bonds.

(4) Amended on June 16, 2017 to extend the termination date.

(5) Pursuant to the amendment entered into in May 2018, the aggregate commitments under the CenterPoint Energy revolving credit facility increased to $3.3 billion on October 5, 2018 as a result of the satisfaction of certain conditions described above.

(6) Issued by CERC Corp.

The Registrants were in compliance with all financial debt covenants as of December 31, 2018.

Maturities.  As of December 31, 2018, maturities of long-term debt, capital leases and sinking fund requirements, excluding the ZENS obligation, are as follows:

	CenterPoint Energy (1)		Houston  Electric (1)		CERC		Securitization Bonds
	(in millions)
2019	$	458	$	458	$	—	$	458
2020	231		231		—		231
2021	1,706		613		593		211
2022	1,230		519		210		219
2023	656		356		300		156

(1) These maturities include Securitization Bonds principal repayments on scheduled payment dates.

Liens.  As of December 31, 2018, Houston Electric’s assets were subject to liens securing approximately $102 million of first mortgage bonds. Sinking or improvement fund and replacement fund requirements on the first mortgage bonds may be satisfied by certification of property additions. Sinking fund and replacement fund requirements for 2018, 2017 and 2016 have been satisfied by certification of property additions. The replacement fund requirement to be satisfied in 2019 is approximately $283 million, and the sinking fund requirement to be satisfied in 2019 is approximately $1.6 million. CenterPoint Energy expects Houston Electric to meet these 2019 obligations by certification of property additions.

As of December 31, 2018, Houston Electric’s assets were also subject to liens securing approximately $3.3 billion of general mortgage bonds, including approximately $68 million held in trust to secure pollution control bonds for which CenterPoint Energy is obligated. The lien of the general mortgage indenture is junior to that of the mortgage pursuant to which the first mortgage

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bonds are issued. Houston Electric may issue additional general mortgage bonds on the basis of retired bonds, 70% of property additions or cash deposited with the trustee.  Approximately $4.3 billion of additional first mortgage bonds and general mortgage bonds could be issued on the basis of retired bonds and 70% of property additions as of December 31, 2018. Houston Electric has contractually agreed that it will not issue additional first mortgage bonds, subject to certain exceptions.

(15) Income Taxes

The components of the Registrant’ income tax expense (benefit) were as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy
Current income tax expense:
Federal	$	89		$	32		$	23
State	9			9			18
Total current expense	98			41			41
Deferred income tax expense (benefit):
Federal	(25		)	(806		)	185
State	73			36			28
Total deferred expense (benefit)	48			(770		)	213
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Houston Electric
Current income tax expense:
Federal	$	109		$	70		$	165
State	18			19			18
Total current expense	127			89			183
Deferred income tax benefit:
Federal	(38		)	(98		)	(34		)
Total deferred benefit	(38		)	(98		)	(34		)
Total income tax expense (benefit)	$	89		$	(9	)	$	149
CERC - Continuing Operations
Current income tax expense (benefit):
Federal	$	(9	)	$	(31	)	$	21
State	—			(10		)	4
Total current expense (benefit)	(9		)	(41		)	25
Deferred income tax expense (benefit):
Federal	10			(249		)	41
State	21			25			15
Total deferred expense (benefit)	31			(224		)	56
Total income tax expense (benefit)	$	22		$	(265	)	$	81

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	Year Ended December 31,
	2018		2017		2016
	(in millions)
CERC - Discontinued Operations
Current income tax expense (benefit):
Federal	$	9	$	31	$	(21	)
State	4		11		2
Total current expense (benefit)	13		42		(19		)
Deferred income tax expense:
Federal	29		56		90
State	4		6		10
Total deferred expense	33		62		100
Total income tax expense	$	46	$	104	$	81

A reconciliation of income tax expense (benefit) using the federal statutory income tax rate to the actual income tax expense and resulting effective income tax rate is as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy (1) (2) (3)
Income before income taxes	$	514		$	1,063		$	686
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	108			372			240
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	22			26			27
State valuation allowance, net of federal income tax	11			3			3
State law change, net of federal income tax	32			—			—
Federal income tax rate reduction	—			(1,113		)	—
Excess deferred income tax amortization	(24		)	—			—
Other, net	(3		)	(17		)	(16		)
Total	38			(1,101		)	14
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Effective tax rate	28		%	(69		)%	37		%
Houston Electric (4) (5)
Income before income taxes	$	425		$	424		$	425
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	89			148			149
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	14			12			12
Federal income tax rate reduction	—			(158		)	—
Excess deferred income tax amortization	(9		)	—			—
Other, net	(5		)	(11		)	(12		)
Total	—			(157		)	—
Total income tax expense (benefit)	$	89		$	(9	)	$	149
Effective tax rate	21		%	(2		)%	35		%

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	Year Ended December 31,
	2018			2017			2016
	(in millions)
CERC - Continuing Operations (6) (7)
Income before income taxes	$	92		$	319		$	199
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	19			112			70
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	5			6			4
State law change, net of federal income tax	—			—			6
State valuation allowance, net of federal income tax	11			3			2
Federal income tax rate reduction	—			(396		)	—
Excess deferred income tax amortization	(15		)	—			—
Tax basis balance sheet adjustment	—			11			—
Other, net	2			(1		)	(1		)
Total	3			(377		)	11
Total income tax expense (benefit)	$	22		$	(265	)	$	81
Effective tax rate	24		%	(83		)%	41		%
CERC - Discontinued Operations (7)
Income before income taxes	$	184		$	265		$	208
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	39			93			73
Increase in tax expense resulting from:
State income tax expense, net of federal income tax	7			11			8
Total	7			11			8
Total income tax expense	$	46		$	104		$	81
Effective tax rate	25		%	39		%	39		%

(1) Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(2) Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

(3) Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

(4) Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(5) Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

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(6) Recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. This item is partially offset by $15 million of amortization of the net regulatory EDIT liability in certain jurisdictions as decreed by regulators beginning in 2018.

(7) Recognized a $396 million deferred tax benefit from the remeasurement of CERC’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. ASC 740 requires tax impacts of changes in tax laws or rates be reported in continuing operations.  Therefore, CERC’s federal income tax benefit generated by the remeasurement of the ADFIT liability for Enable during 2017 and state law changes during 2016 associated with its investment in Enable are reported in continuing operations on CERC’s Statements of Consolidated Income. The ADFIT liability associated with CERC’s investment in Enable is reported as discontinued operations on CERC’s Consolidated Balance Sheets. 

The tax effects of temporary differences that give rise to significant portions of deferred tax assets and liabilities were as follows:

	December 31,
	2018			2017
	(in millions)
CenterPoint Energy
Deferred tax assets:
Benefits and compensation	$	160		$	162
Regulatory liabilities	356			347
Loss and credit carryforwards	84			90
Asset retirement obligations	62			68
Other	29			16
Valuation allowance	(18		)	(7		)
Total deferred tax assets	673			676
Deferred tax liabilities:
Property, plant and equipment	1,894			1,808
Investment in unconsolidated affiliates	987			927
Regulatory assets	395			473
Investment in marketable securities and indexed debt	478			502
Indexed debt securities derivative	27			13
Other	131			127
Total deferred tax liabilities	3,912			3,850
Net deferred tax liabilities	$	3,239		$	3,174
Houston Electric
Deferred tax assets:
Regulatory liabilities	$	205		$	198
Benefits and compensation	17			28
Asset retirement obligations	7			7
Other	12			3
Total deferred tax assets	241			236
Deferred tax liabilities:
Property, plant and equipment	1,087			1,030
Regulatory assets	177			265
Total deferred tax liabilities	1,264			1,295
Net deferred tax liabilities	$	1,023		$	1,059

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	December 31,
	2018			2017
	(in millions)
CERC - Continuing Operations
Deferred tax assets:
Benefits and compensation	$	27		$	27
Regulatory liabilities	150			150
Loss and credit carryforwards	259			288
Asset retirement obligations	54			60
Other	20			18
Valuation allowance	(18		)	(7		)
Total deferred tax assets	492			536
Deferred tax liabilities:
Property, plant and equipment	773			745
Regulatory assets	41			38
Other	84			115
Total deferred tax liabilities	898			898
Net deferred tax liabilities	$	406		$	362
CERC - Discontinued Operations
Deferred tax liabilities:
Investment in unconsolidated affiliates	—			927
Net deferred tax liabilities	$	—		$	927

Federal Tax Reform

On December 22, 2017, President Trump signed into law comprehensive tax reform legislation informally called the Tax Cuts and Jobs Acts, or TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018.  The new legislation contained several key tax provisions that impacted the Registrants, including the reduction of the corporate income tax rate from 35% to 21% effective January 1, 2018. The legislation also includes a variety of other changes, such as, a limitation on the tax deductibility of interest expense, acceleration of business asset expensing and reduction in the amount of executive pay that may qualify for a tax deduction, among others. Several other provisions of the TCJA were not generally applicable to the public utility industry, including the limitation on the tax deductibility of interest expense and the acceleration of business asset expensing.

While the effective date of the rate change in the legislation was January 1, 2018, ASC 740 requires that deferred tax balances be adjusted in the period of enactment to the rate in which those deferred taxes will reverse.

During 2017, CenterPoint Energy’s EDIT from the rate change resulted in an adjustment to income tax expense of approximately $1.1 billion and creation of a net regulatory liability of $1.3 billion (includes $0.3 billion gross-up) for the amount that is likely to be returned to ratepayers. The major components of the $1.1 billion benefit to income tax expense are for the remeasurement of CenterPoint Energy's deferred taxes associated with its investment in Enable, investment in marketable securities (ZENS) and stranded costs related to the Securitization Bonds.

During 2017, Houston Electric’s EDIT from the rate change resulted in an adjustment to income tax expense of $158 million and creation of a net regulatory liability of $829 million (includes $180 million gross-up) for the amount that is likely to be returned to ratepayers. The $158 million benefit to income tax expense is for the remeasurement of Houston Electric’s stranded costs related to the Securitization Bonds.

During 2017, CERC’s EDIT from the rate change resulted in an adjustment to income tax expense of $396 million and creation of a net regulatory liability of $478 million (includes $121 million gross-up) for the amount that is likely to be returned to ratepayers. The major components of the $396 million benefit to income tax expense were for the remeasurement of CERC’s deferred taxes associated with its investment in Enable and federal net operating loss carryforwards.

The amount and expected amortization of the net regulatory tax liability may differ from the Registrants’ estimates, possibly materially, due to, among other things, regulatory actions, interpretations and assumptions the Registrants have made, and any guidance that may be issued in the future. The Registrants will continue to assess the amount and expected amortization of the net regulatory tax liability as they have proceedings with regulators in future periods.

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Houston Electric and CERC are included in CenterPoint Energy’s U.S. federal consolidated income tax return. Houston Electric and CERC report their income tax provision on a separate entity basis pursuant to a tax sharing agreement with CenterPoint Energy.

Tax Attribute Carryforwards and Valuation Allowance.  CenterPoint Energy has no remaining federal net operating loss carryforward or federal tax credits as of December 31, 2018. As of December 31, 2018, CenterPoint Energy had $802 million of state net operating loss carryforwards that expire between 2019 and 2038 and $18 million of state tax credits that do not expire. CenterPoint Energy reported a valuation allowance of $18 million because it is more likely than not that the benefit from certain state net operating loss carryforwards will not be realized.

CERC has $951 million of federal net operating loss carryforwards which have an indefinite carryforward period, however, utilization is limited to 80 percent of taxable income in any given taxable year. CERC has $797 million of state net operating loss carryforwards which expire between 2019 and 2038 and $17 million of state tax credits which do not expire. CERC reported a valuation allowance of $18 million since it is more likely than not that the benefit from certain state net operating loss carryforwards will not be realized.

Uncertain Income Tax Positions. The Registrants reported no uncertain tax liabilities as of December 31, 2018, 2017 and 2016. The Registrants expect no significant change to the uncertain tax liabilities over the next 12 months ending December 31, 2019.

Tax Audits and Settlements.   Tax years through 2016 have been audited and settled with the IRS, however, during 2018 CenterPoint Energy filed an amended 2014 tax return to claim additional tax credits that is currently under review by the IRS. For the 2017 and 2018 tax years, the Registrants are participants in the IRS’s Compliance Assurance Process.

(16) Commitments and Contingencies

(a) Natural Gas Supply Commitments (CenterPoint Energy and CERC)

Natural gas supply commitments include natural gas contracts related to CenterPoint Energy’s and CERC’s Natural Gas Distribution and Energy Services reportable segments, which have various quantity requirements and durations, that are not classified as non-trading derivative assets and liabilities in CenterPoint Energy’s and CERC’s Consolidated Balance Sheets as of December 31, 2018 and 2017 as these contracts meet an exception as “normal purchases contracts” or do not meet the definition of a derivative. Natural gas supply commitments also include natural gas transportation contracts that do not meet the definition of a derivative.

As of December 31, 2018, minimum payment obligations for natural gas supply commitments are approximately:

	(in millions)
2019	$	454
2020	430
2021	343
2022	231
2023	154
2024 and beyond	1,446

(b) AMAs (CenterPoint Energy and CERC)

NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third party AMAs in Arkansas, Louisiana and Oklahoma expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost. Generally, AMAs are contracts between NGD and an asset manager that are intended to transfer the working capital obligation and maximize the utilization of the assets.  In these AMAs, NGD agrees to release transportation and storage capacity to other parties to manage natural gas storage, supply and delivery arrangements for NGD and to use the released capacity for other purposes when it is not needed for NGD. NGD is compensated by the asset manager through payments

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made over the life of the AMAs. NGD has an obligation to purchase its winter storage requirements that have been released to the asset manager under these AMAs.

(c) Lease Commitments

The following table sets forth information concerning the Registrants’ obligations under non-cancelable long-term operating leases as of December 31, 2018, which primarily consist of rental agreements for real property:            

	CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	6	$	1	$	5
2020	6		—		5
2021	5		—		4
2022	4		—		4
2023	3		—		3
2024 and beyond	12		—		11
Total	$	36	$	1	$	32

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Lease expense	$	9	$	1	$	8	$	10	$	1	$	9	$	10	$	1	$	9

(d) Legal, Environmental and Other Matters

Legal Matters (CenterPoint Energy and CERC)

Gas Market Manipulation Cases. CenterPoint Energy, its predecessor, Reliant Energy, and certain of their former subsidiaries were named as defendants in a large number of lawsuits filed against numerous gas market participants in a number of federal and western state courts in connection with the operation of the natural gas markets in 2000-2002. CenterPoint Energy and its affiliates were released or dismissed from all such cases, except for one case pending in federal court in Nevada in which CES, a subsidiary of CERC Corp., is a defendant. Plaintiffs in that case allege a conspiracy to inflate Wisconsin natural gas prices in 2000-2002. In May 2016, the district court granted CES’s motion for summary judgment, dismissing CES from the case. In August 2018, the Ninth Circuit Court of Appeals reversed that ruling, and CES requested further appellate review of that decision (which review has been stayed pending approval of the settlement agreement described below).

Under a master separation agreement between CenterPoint Energy and a former subsidiary, RRI, CenterPoint Energy and its subsidiaries are entitled to be indemnified by RRI and its successors for any losses, including certain attorneys’ fees and other costs, arising out of these lawsuits.  Through a series of transactions, RRI became known as GenOn and a wholly-owned subsidiary of NRG. None of those transactions alters GenOn’s contractual obligations to indemnify CenterPoint Energy and its subsidiaries for certain liabilities, including their indemnification obligations regarding the gas market manipulation litigation. In June 2017, however, GenOn and various affiliates filed for protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2018, GenOn completed its reorganization and emerged from Chapter 11. CenterPoint Energy, CERC, and CES submitted proofs of claim in the bankruptcy proceedings to protect their indemnity rights. In October 2018, CES, GenOn, and the plaintiffs reached an agreement to settle all claims against CES and CES’s indemnity claims against GenOn, subject to approvals by the bankruptcy court and the federal district court. In January 2019, the bankruptcy court approved the settlement between CES and GenOn. If the settlement agreement between CES, GenOn and the plaintiffs is not approved by the federal district court, CES could incur liability and be responsible for satisfying it. CenterPoint Energy does not expect the ultimate outcome of this matter to have a material adverse effect on its financial condition, results of operations or cash flows.

Minnehaha Academy. On August 2, 2017, a natural gas explosion occurred at the Minnehaha Academy in Minneapolis, Minnesota, resulting in the deaths of two school employees, serious injuries to others and significant property damage to the school.  CenterPoint Energy, certain of its subsidiaries, including CERC, and the contractor company working in the school have been named in litigation arising out of this incident. CenterPoint Energy and CERC have reached confidential settlement agreements with some claimants. Additionally, CenterPoint Energy and CERC are cooperating with the ongoing investigation conducted by

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the National Transportation Safety Board. Further, CenterPoint Energy and CERC are contesting approximately $200,000 in fines imposed by the Minnesota Office of Pipeline Safety.  In early 2018, the Minnesota Occupational Safety and Health Administration concluded its investigation without any adverse findings against CenterPoint Energy or CERC. CenterPoint Energy’s and CERC’s general and excess liability insurance policies provide coverage for third party bodily injury and property damage claims. 

Environmental Matters

MGP Sites(CenterPoint Energy and CERC). CenterPoint Energy, CERC and its predecessors operated MGPs in the past.  With respect to certain Minnesota MGP sites, CenterPoint Energy and CERC have completed state-ordered remediation and continue state-ordered monitoring and water treatment. As of December 31, 2018, CenterPoint Energy and CERC had a recorded liability of $7 million for continued monitoring and any future remediation required by regulators in Minnesota. The estimated range of possible remediation costs for the sites for which CenterPoint Energy and CERC believe they may have responsibility was $5 million to $32 million based on remediation continuing for 30 to 50 years. The cost estimates are based on studies of a site or industry average costs for remediation of sites of similar size. The actual remediation costs will depend on the number of sites to be remediated, the participation of other PRPs, if any, and the remediation methods used. 

In addition to the Minnesota sites, the EPA and other regulators have investigated MGP sites that were owned or operated by CenterPoint Energy or CERC or may have been owned by one of their former affiliates. CenterPoint Energy and CERC do not expect the ultimate outcome of these matters to have a material adverse effect on the financial condition, results of operations or cash flows of either CenterPoint Energy or CERC.

Asbestos.Some facilities owned by the Registrants or their predecessors in interest contain or have contained asbestos insulation and other asbestos-containing materials. The Registrants are from time to time named, along with numerous others, as defendants in lawsuits filed by a number of individuals who claim injury due to exposure to asbestos, and the Registrants anticipate that additional claims may be asserted in the future.  Although their ultimate outcome cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows.

Other Environmental. From time to time, the Registrants identify the presence of environmental contaminants during operations or on property where predecessor companies have conducted operations.  Other such sites involving contaminants may be identified in the future.  The Registrants have and expect to continue to remediate any identified sites consistent with state and federal legal obligations.  From time to time, the Registrants have received notices, and may receive notices in the future, from regulatory authorities or others regarding status as a PRP in connection with sites found to require remediation due to the presence of environmental contaminants. In addition, the Registrants have been, or may be, named from time to time as defendants in litigation related to such sites. Although the ultimate outcome of such matters cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows.

Other Proceedings

The Registrants are involved in other legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. From time to time, the Registrants are also defendants in legal proceedings with respect to claims brought by various plaintiffs against broad groups of participants in the energy industry. Some of these proceedings involve substantial amounts. The Registrants regularly analyze current information and, as necessary, provide accruals for probable and reasonably estimable liabilities on the eventual disposition of these matters. The Registrants do not expect the disposition of these matters to have a material adverse effect on the Registrants’ financial condition, results of operations or cash flows.

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(17) Earnings Per Share(CenterPoint Energy)

The following table reconciles numerators and denominators of CenterPoint Energy’s basic and diluted earnings per common share. Basic earnings per common share is determined by dividing Income available to common shareholders - basic by the Weighted average common shares outstanding - basic for the applicable period. Diluted earnings per common share is determined by the inclusion of potentially dilutive common stock equivalent shares that may occur if securities to issue Common Stock were exercised or converted into Common Stock.

	For the Year Ended December 31,
	2018		2017		2016
	(in millions, except per share and share amounts)
Numerator:
Income available to common shareholders - basic (1)	$	333	$	1,792	$	432
Add back: Series B Preferred Stock dividend	—		—		—
Income available to common shareholders - diluted (1)	$	333	$	1,792	$	432
Denominator:
Weighted average common shares outstanding - basic	448,829,000		430,964,000		430,606,000
Plus: Incremental shares from assumed conversions:
Restricted stock (2)	3,636,000		3,344,000		2,997,000
Series B Preferred Stock (3)	—		—		—
Weighted average common shares outstanding - diluted	452,465,000		434,308,000		433,603,000
Earnings per common share:
Basic earnings per common share	$	0.74	$	4.16	$	1.00
Diluted earnings per common share	$	0.74	$	4.13	$	1.00

(1) Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

(2) The potentially dilutive impact from restricted stock awards applies the treasury stock method. Under this method, an increase in the average fair market value of Common Stock can result in a greater dilutive impact from these securities.

(3) The potentially dilutive impact from Series B Preferred Stock applies the if-converted method in calculating diluted earnings per common share. Under this method, diluted earnings per common share is adjusted for the more dilutive effect of the Series B Preferred Stock as a result of either its accumulated dividend for the period in the numerator or the assumed-converted common share equivalent in the denominator. The computation of diluted earnings per common share outstanding for the year ended December 31, 2018 excludes 8,885,000 potentially dilutive shares because to include them would be anti-dilutive. However, these shares could be potentially dilutive in the future.

(18) Unaudited Quarterly Information

Summarized quarterly financial data is as follows:

	Year Ended December 31, 2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	3,155	$	2,186		$	2,212	$	3,036
Operating income	251		187			226		167
Income (loss) available to common shareholders	165		(75		)	153		90
Basic earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18
Diluted earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18

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	Year Ended December 31, 2018
	First Quarter	Second Quarter		Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
Houston Electric
Revenues	755	854		897		728
Operating income	119	181		227		98
Net income	52	101		143		40
CERC (4)
Revenues	2,400	1,328		1,312		2,303
Operating income (loss)	131	22		(7	)	76
Income (loss) from continuing operations	78	(8	)	(35	)	35
Income (loss) from discontinued operations	52	44		44		(2	)
Net income	130	36		9		33

	Year Ended December 31, 2017
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	2,735	$	2,143	$	2,098		$	2,638
Operating income (2)	291		240		297			308
Income available to common shareholders (3)	192		135		169			1,296
Basic earnings per common share (1)	0.45		0.31		0.39			3.01
Diluted earnings per common share (1)	0.44		0.31		0.39			2.99
Houston Electric
Revenues	638		752		843			765
Operating income (2)	85		171		254			127
Net income (3)	18		75		130			210
CERC (4)
Revenues	2,093		1,387		1,251			1,872
Operating income (2)	199		59		31			178
Income (loss) from continuing operations	102		17		(4		)	469
Income from discontinued operations	45		37		42			37
Net income (3)	147		54		38			506

(1) Quarterly earnings (loss) per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings (loss) per common share.

(2) Recast to reflect the adoption of ASU 2017-07. See Note 2(r) for further information.

(3) Income available to common shareholders and Net income for the fourth quarter 2017 include a reduction in income tax expense of $1,113 million, $158 million and $396 million for CenterPoint Energy, Houston Electric and CERC, respectively, due to the TCJA. See Note 15 for further discussion of the impacts of tax reform implementation.

(4) Amounts have been recast to reflect discontinued operations in all periods presented.

(19) Reportable Segments

The Registrants’ determination of reportable segments considers the strategic operating units under which the Registrants manage sales, allocate resources and assess performance of various products and services to wholesale or retail customers in differing regulatory environments. The Registrants use operating income as the measure of profit or loss for the reportable segments other than Midstream Investments, where equity in earnings is used.

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As of December 31, 2018, reportable segments by Registrant are as follows:

	Electric Transmission & Distribution	Natural Gas Distribution	Energy  Services	Midstream Investments	Other Operations
CenterPoint Energy	X	X	X	X	X
Houston Electric	X
CERC		X	X	(1)	X

(1) On September 4, 2018, CERC completed the Internal Spin. Previously, CERC’s equity method investment in Enable was included in CERC’s Midstream Investments reportable segment. CERC’s equity in earnings in Enable, net of basis difference amortization and income tax, have been classified as discontinued operations for all periods presented. See Note 11 for further discussion on the Internal Spin and the associated discontinued operations presentation.

Electric Transmission & Distribution consists of the electric transmission and distribution function. Natural Gas Distribution consists of intrastate natural gas sales to, and natural gas transportation and distribution for, residential, commercial, industrial and institutional customers. Energy Services consists of non-rate regulated natural gas sales and services operations. Midstream Investments consists of the equity investment in Enable (excluding the Enable Series A Preferred Units). Other Operations consists primarily of other corporate operations which support all of the business operations.

Houston Electric consists of a single reportable segment, Electric Transmission & Distribution, and therefore is not included in the tabular reportable segment presentation below.

Operating income (loss) amounts for 2017 and 2016 have been recast to reflect the adoption of ASU 2017-07 (see Note 2(r) for further information).

Long-lived assets include net property, plant and equipment, goodwill and other intangibles and equity investments in unconsolidated subsidiaries. Intersegment sales are eliminated in consolidation.

Financial data for reportable segments and products and services are as follows:

CenterPoint Energy

	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Electric Transmission & Distribution	$	3,232	(1)	$	—		$	917	$	623		$	10,509			$	952
Natural Gas Distribution	2,931			36			277		266			6,956				638
Energy Services	4,411			110			16		(47		)	1,558				20
Midstream Investments (2)	—			—			—		—			2,482				—
Other Operations	15			—			33		(11		)	6,156			(3)	110
Eliminations	—			(146		)	—		—			(652		)		—
Consolidated	$	10,589		$	—		$	1,243	$	831		$	27,009			1,720
Reconciling items																(69		)
Capital expenditures per Statements of Consolidated Cash Flows																$	1,651

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	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income		Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2017:
Electric Transmission & Distribution	$	2,997	(1)	$	—		$	724	$	636	$	10,292			$	924
Natural Gas Distribution	2,606			33			260		348		6,608				523
Energy Services	3,997			52			19		126		1,521				11
Midstream Investments (2)	—			—			—		—		2,472				—
Other Operations	14			—			33		26		2,497			(3)	36
Eliminations	—			(85		)	—		—		(654		)		—
Consolidated	$	9,614		$	—		$	1,036	$	1,136	$	22,736			1,494
Reconciling items															(68		)
Capital expenditures per Statements of Consolidated Cash Flows															$	1,426
As of and for the year ended December 31, 2016:
Electric Transmission & Distribution	$	3,060	(1)	$	—		$	838	$	653	$	10,211			$	858
Natural Gas Distribution	2,380			29			242		321		6,099				510
Energy Services	2,073			26			7		21		1,102				5
Midstream Investments (2)	—			—			—		—		2,505				—
Other Operations	15			—			39		28		2,681			(3)	33
Eliminations	—			(55		)	—		—		(769		)		—
Consolidated	$	7,528		$	—		$	1,126	$	1,023	$	21,829			1,406
Reconciling items															8
Capital expenditures per Statements of Consolidated Cash Flows															$	1,414

(1) CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Affiliates of NRG	$	705	$	713	$	698
Affiliates of Vistra Energy Corp.	251		229		220

(2) CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Enable	$	307	$	265	$	208

(3) Total assets included pension and other postemployment-related regulatory assets of $665 million, $600 million and $759 million as of December 31, 2018, 2017 and 2016, respectively. Additionally, total assets as of December 31, 2018 included $3.9 billion of temporary investments included in Cash and cash equivalents on CenterPoint Energy’s Consolidated Balance Sheets.

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CERC

	Revenues from External Customers		Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets (1)				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Natural Gas Distribution	$	2,931	$	36		$	277	$	266		$	6,956			$	638
Energy Services	4,411		110			16		(47		)	1,558				20
Other Operations	1		—			—		3			66				—
Eliminations	—		(146		)	—		—			(366		)		—
Consolidated	$	7,343	$	—		$	293	$	222		$	8,214			658
Reconciling items															(25		)
Capital expenditures per Statements of Consolidated Cash Flows															$	633
As of and for the year ended December 31, 2017:
Natural Gas Distribution	$	2,606	$	33		$	260	$	348		$	6,608			$	523
Energy Services	3,997		52			19		126			1,521				11
Discontinued operations	—		—			—		—			2,472			(1)	—
Other Operations	—		—			—		(7		)	70				—
Eliminations	—		(85		)	—		—			(559		)		—
Consolidated	$	6,603	$	—		$	279	$	467		$	10,112			534
Reconciling items															(21		)
Capital expenditures per Statements of Consolidated Cash Flows															$	513
As of and for the year ended December 31, 2016:
Natural Gas Distribution	$	2,380	$	29		$	242	$	321		$	6,099			$	510
Energy Services	2,073		26			7		21			1,102				5
Discontinued operations	—		—			—		—			2,505			(1)	—
Other Operations	1		—			—		(1		)	75				—
Eliminations	—		(55		)	—		—			(563		)		—
Consolidated	$	4,454	$	—		$	249	$	341		$	9,218			515
Reconciling items															2
Capital expenditures per Statements of Consolidated Cash Flows															$	517

(1) On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

	Year Ended December 31,
	2018						2017						2016
Revenues by Products and Services:	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Electric delivery	$	3,232	$	3,234	$	—	$	2,997	$	2,998	$	—	$	3,060	$	3,059	$	—
Retail gas sales	4,161		—		4,161		3,634		—		3,634		3,329		—		3,329
Wholesale gas sales	3,008		—		3,008		2,811		—		2,811		977		—		977
Gas transportation and processing	32		—		32		29		—		29		23		—		23
Energy products and services	156		—		142		143		—		129		139		—		125
Total	$	10,589	$	3,234	$	7,343	$	9,614	$	2,998	$	6,603	$	7,528	$	3,059	$	4,454

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(20) Supplemental Disclosure of Cash Flow Information

The tables below provide supplemental disclosure of cash flow information:

	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy			Houston Electric		CERC
	(in millions)
Cash Payments/Receipts:
Interest, net of capitalized interest	$	363	$	200	$	105	$	378	$	205	$	116	$	406		$	209	$	116
Income taxes (refunds), net	89		154		3		15		76		4		(104		)	128		3
Non-cash transactions:
Accounts payable related to capital expenditures	201		124		80		144		104		56		87			65		35
Capital distribution associated with the Internal Spin	—		—		1,473		—		—		—		—			—		—

The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Consolidated Balance Sheets to the amount reported in the Statements of Consolidated Cash Flows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Cash and cash equivalents (1) (2)	$	4,231	$	335	$	14	$	260	$	238	$	12
Restricted cash included in Prepaid expenses and other current assets	46		34		11		35		35		—
Restricted cash included in Other	1		1		—		1		1		—
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows	$	4,278	$	370	$	25	$	296	$	274	$	12

(1) CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

(2) Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

(21) Related Party Transactions (Houston Electric and CERC)

Houston Electric and CERC participate in a money pool through which they can borrow or invest on a short-term basis. Funding needs are aggregated and external borrowing or investing is based on the net cash position. The net funding requirements of the money pool are expected to be met with borrowings under CenterPoint Energy’s revolving credit facility or the sale of CenterPoint Energy’s commercial paper.The table below summarizes money pool activity:

	December 31, 2018						December 31, 2017
	Houston Electric			CERC			Houston Electric			CERC
	(in millions)
Money pool investments (borrowings) (1)	$	(1	)	$	114		$	(60	)	$	(570	)
Weighted average interest rate	2.42		%	2.42		%	1.90		%	1.90		%

(1) Included in Accounts and notes receivable (payable)–affiliated companies in Houston Electric’s and CERC’s Consolidated Balance Sheets.

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Houston Electric and CERC affiliate-related net interest income (expense) were as follows:

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric			CERC
	(in millions)
Interest income (expense), net (1)	$	1	$	—	$	2	$	—	$	(4	)	$	—

(1) Interest income is included in Other, net and interest expense is included in Interest and other finance charges on Houston Electric’s and CERC’s respective Statements of Consolidated Income.

CenterPoint Energy provides some corporate services to Houston Electric and CERC. The costs of services have been charged directly to Houston Electric and CERC using methods that management believes are reasonable. These methods include negotiated usage rates, dedicated asset assignment and proportionate corporate formulas based on operating expenses, assets, gross margin, employees and a composite of assets, gross margin and employees. Houston Electric provides certain services to CERC. These services are billed at actual cost, either directly or as an allocation and include fleet services, shop services, geographic services, surveying and right-of-way services, radio communications, data circuit management and field operations. Additionally, CERC provides certain services to Houston Electric. These services are billed at actual cost, either directly or as an allocation and include line locating and other miscellaneous services. These charges are not necessarily indicative of what would have been incurred had Houston Electric and CERC not been affiliates.

Amounts charged for these services were as follows and are included primarily in operation and maintenance expenses:

	Year Ended December 31,
	2018					2017					2016
	Houston Electric			CERC		Houston Electric			CERC		Houston Electric			CERC
	(in millions)
Corporate service charges	$	190		$	147	$	188		$	128	$	179		$	125
Net affiliate service charges (billings)	(17		)	17		(9		)	9		(8		)	8

The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding.

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric		CERC
	(in millions)
Cash dividends paid to parent	$	209	$	360	$	180	$	601	$	135	$	643
Cash contribution from parent	200		960		—		38		374		72
Capital distribution to parent associated with the Internal Spin	—		1,473		—		—		—		—

(22) Subsequent Events

Enable Distributions Declarations (CenterPoint Energy)

Equity Instrument	Declaration Date	Record Date	Payment Date	Per Unit Distribution		Expected Cash Distribution
						(in millions)
Common units	February 8, 2019	February 19, 2019	February 26, 2019	$	0.318	$	74
Enable Series A Preferred Units	February 8, 2019	February 8, 2019	February 14, 2019	0.625		9

Item 9. Changes in and Disagreements with Accountants on Accounting andFinancial Disclosure

None.

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Item 9A. Controls and Procedures

Disclosure Controls And Procedures

In accordance with Exchange Act Rules 13a-15 and 15d-15, the Registrants carried out separate evaluations, under the supervision and with the participation of each company’s management, including the principal executive officer and principal financial officer, of the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report. Based on those evaluations, the principal executive officer and principal financial officer, in each case, concluded that the disclosure controls and procedures were effective as of December 31, 2018 to provide assurance that information required to be disclosed in the reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and such information is accumulated and communicated to management, including the principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding disclosure.

There has been no change in the Registrants’ internal controls over financial reporting that occurred during the three months ended December 31, 2018 that has materially affected, or is reasonably likely to materially affect, the Registrants’ internal controls over financial reporting.

Management’s Annual Report on Internal Control over Financial Reporting

The Registrants’ management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is defined in Rule 13a-15(f) or 15d-15(f) promulgated under the Securities Exchange Act of 1934 as a process designed by, or under the supervision of, the company’s principal executive and principal financial officers and effected by the company’s board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and includes those policies and procedures that:

• Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of the assets of the company;

• Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and

• Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company’s assets that could have a material effect on the financial statements.

Management has designed its internal control over financial reporting to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements in accordance with accounting principles generally accepted in the United States of America. Management’s assessment included review and testing of both the design effectiveness and operating effectiveness of controls over all relevant assertions related to all significant accounts and disclosures in the financial statements.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Under the supervision and with the participation of the Registrants’ management, including their respective principal executive officers and principal financial officers, the Registrants conducted an evaluation of the effectiveness of their internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on the Registrants’ evaluation under the framework in Internal Control — Integrated Framework (2013), the Registrants’ management has concluded, in each case, that their internal control over financial reporting was effective as of December 31, 2018.

Deloitte & Touche LLP, CenterPoint Energy’s independent registered public accounting firm, has issued an attestation report on the effectiveness of CenterPoint Energy’s internal control over financial reporting as of December 31, 2018 which is set forth below. This report is not applicable to Houston Electric or CERC as they are not accelerated or large accelerated filers.

165

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

CenterPoint Energy, Inc.

Houston, Texas

Opinion on Internal Control over Financial Reporting

 We have audited the internal control over financial reporting of CenterPoint Energy, Inc. and subsidiaries (the “Company”) as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2018, of the Company and our report dated February 28, 2019, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019

166

Item 9B. Other Information

Amended and Restated Short Term Incentive Plan

Effective January 1, 2019, the Board of Directors of CenterPoint Energy amended and restated the CenterPoint Energy, Inc. Short Term Incentive Plan. The Short Term Incentive Plan, as amended and restated, includes, among other things, the following changes:

• Revised eligibility requirements to provide clarity with respect to participants employed for a portion of the applicable plan year;

• Amended methodology for calculating payments upon retirement;

• Removed manager discretion with respect to terminations after the plan year but before the payment date to conform to operational practice; and

• Deleted provisions related to Section 162(m) of the Internal Revenue Code to reflect current legislative changes.

The foregoing description of the Short Term Incentive Plan does not purport to be complete and is subject to, and qualified in its entirety by, reference to the complete text of the Short Term Incentive Plan, a copy of which is filed as Exhibit 10(m) to this Annual Report on Form 10-K and incorporated by reference herein.

Termination of Certain Plans of Vectren

On February 26, 2019, the Board of Directors of Vectren terminated (i) the At Risk Compensation Plan, dated May 1, 2001, as most recently amended and restated May 24, 2016, (ii) the Vectren Incentive Plan Guidelines and (iii) the Severance Plan for Executive Officers, dated December 31, 2011, as most recently amended and restated February 21, 2017, the terminations of which are effective as of February 26, 2019. With respect to the At Risk Compensation Plan and the Vectren Incentive Plan Guidelines, there were no awards outstanding under each respective plan as of the termination. With respect to the Severance Plan for Executive Officers, there were no participants under such plan upon the closing of the Merger.

PART III

Item 10. Directors, Executive Officers and Corporate Governance

For CenterPoint Energy, the information called for by Item 10, to the extent not set forth in “Executive Officers” in Item 1, will be set forth in the definitive proxy statement relating to CenterPoint Energy’s 2019 annual meeting of shareholders pursuant to SEC Regulation 14A. Such definitive proxy statement relates to a meeting of shareholders involving the election of directors and the portions thereof called for by Item 10 are incorporated herein by reference pursuant to Instruction G to Form 10-K.

For Houston Electric and CERC, the information called for by Item 10 is omitted pursuant to Instruction I(2) to Form 10-K (Omission of Information by Certain Wholly-Owned Subsidiaries).

Item 11. Executive Compensation

For CenterPoint Energy, the information called for by Item 11 will be set forth in the definitive proxy statement relating to CenterPoint Energy’s 2019 annual meeting of shareholders pursuant to SEC Regulation 14A. Such definitive proxy statement relates to a meeting of shareholders involving the election of directors and the portions thereof called for by Item 11 are incorporated herein by reference pursuant to Instruction G to Form 10-K.

For Houston Electric and CERC, the information called for by Item 11 is omitted pursuant to Instruction I(2) to Form 10-K (Omission of Information by Certain Wholly-Owned Subsidiaries).

Item 12. Security Ownership of Certain Beneficial Owners and Managementand Related Stockholder Matters

For CenterPoint Energy, the information called for by Item 12 will be set forth in the definitive proxy statement relating to CenterPoint Energy’s 2019 annual meeting of shareholders pursuant to SEC Regulation 14A. Such definitive proxy statement relates to a meeting of shareholders involving the election of directors and the portions thereof called for by Item 12 are incorporated herein by reference pursuant to Instruction G to Form 10-K.

167

For Houston Electric and CERC, the information called for by Item 12 is omitted pursuant to Instruction I(2) to Form 10-K (Omission of Information by Certain Wholly-Owned Subsidiaries).

Item 13. Certain Relationships and Related Transactions, and DirectorIndependence

For CenterPoint Energy, the information called for by Item 13 will be set forth in the definitive proxy statement relating to CenterPoint Energy’s 2019 annual meeting of shareholders pursuant to SEC Regulation 14A. Such definitive proxy statement relates to a meeting of shareholders involving the election of directors and the portions thereof called for by Item 13 are incorporated herein by reference pursuant to Instruction G to Form 10-K. See Note 11 for information related to CenterPoint Energy’s affiliate transactions.

For Houston Electric and CERC, the information called for by Item 13 is omitted pursuant to Instruction I(2) to Form 10-K (Omission of Information by Certain Wholly-Owned Subsidiaries).

Item 14. Principal Accounting Fees and Services

For CenterPoint Energy, the information called for by Item 14 will be set forth in the definitive proxy statement relating to CenterPoint Energy’s 2019 annual meeting of shareholders pursuant to SEC Regulation 14A. Such definitive proxy statement relates to a meeting of shareholders involving the election of directors and the portions thereof called for by Item 14 are incorporated herein by reference pursuant to Instruction G to Form 10-K.

Aggregate fees billed to Houston Electric and CERC during the year ended December 31, 2018 and 2017 by their principal accounting firm, Deloitte & Touche LLP, are set forth below.

	Year Ended December 31,
	2018				2017
	Houston Electric		CERC		Houston Electric		CERC
Audit fees (1)	$	859,950	$	1,360,800	$	819,364	$	1,296,576
Audit-related fees (2)	529,000		121,000		516,000		106,000
Total audit and audit-related fees	1,388,950		1,481,800		1,335,364		1,402,576
Tax fees	—		—		—		—
All other fees	—		—		—		—
Total fees	$	1,388,950	$	1,481,800	$	1,335,364	$	1,402,576

(1) For 2018 and 2017, amounts include fees for services provided by the principal accounting firm relating to the integrated audit of financial statements and internal control over financial reporting, statutory audits, attest services, and regulatory filings.

(2) For 2018 and 2017, includes fees for consultations concerning financial accounting and reporting standards and various agreed-upon or expanded procedures related to accounting records to comply with financial accounting or regulatory reporting matters.

Houston Electric and CERC each are not required to have, and do not have, an audit committee.

168

PART IV

Item 15. Exhibits and Financial Statement Schedules

(a)(1) Financial Statements.

CenterPoint Energy
Report of Independent Registered Public Accounting Firm	84
Statements of Consolidated Income for the Three Years Ended December 31, 2018	85
Statements of Consolidated Comprehensive Income for the Three Years Ended December 31, 2018	86
Consolidated Balance Sheets as of December 31, 2018 and 2017	87
Statements of Consolidated Cash Flows for the Three Years Ended December 31, 2018	89
Statements of Consolidated Changes in Equity for the Three Years Ended December 31, 2018	90
Houston Electric
Report of Independent Registered Public Accounting Firm	91
Statements of Consolidated Income for the Three Years Ended December 31, 2018	92
Statements of Consolidated Comprehensive Income for the Three Years Ended December 31, 2018	93
Consolidated Balance Sheets as of December 31, 2018 and 2017	94
Statements of Consolidated Cash Flows for the Three Years Ended December 31, 2018	95
Statements of Consolidated Changes in Equity for the Three Years Ended December 31, 2018	95
CERC
Report of Independent Registered Public Accounting Firm	97
Statements of Consolidated Income for the Three Years Ended December 31, 2018	98
Statements of Consolidated Comprehensive Income for the Three Years Ended December 31, 2018	99
Consolidated Balance Sheets as of December 31, 2018 and 2017	100
Statements of Consolidated Cash Flows for the Three Years Ended December 31, 2018	102
Statements of Consolidated Changes in Equity for the Three Years Ended December 31, 2018	103
Combined Notes to Consolidated Financial Statements	104

The financial statements of Enable Midstream Partners, LP required pursuant to Rule 3-09 of Regulation S-X are included in this filing for CenterPoint Energy as Exhibit 99.1.

(a)(2) Financial Statement Schedules for the Three Years Ended December 31, 2018.

The following schedules are omitted by the Registrants because of the absence of the conditions under which they are required or because the required information is included in the financial statements:

I, II, III, IV and V.

(a)(3) Exhibits.

See Index of Exhibits beginning on page 170, which index also includes the management contracts or compensatory plans or arrangements required to be filed as exhibits to this Form 10-K by Item 601(b)(10)(iii) of Regulation S-K.

Item 16.Form 10-K Summary

None.

169

CENTERPOINT ENERGY, INC. AND SUBSIDIARIES

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC AND SUBSIDIARIES

CENTERPOINT ENERGY RESOURCES CORP. AND SUBSIDIARIES

EXHIBITS TO THE COMBINED ANNUAL REPORT ON FORM 10-K

For Fiscal Year Ended December 31, 2018

INDEX OF EXHIBITS

Exhibits included with this report are designated by a cross (†); all exhibits not so designated are incorporated herein by reference to a prior filing as indicated. Exhibits designated by an asterisk (*) are management contracts or compensatory plans or arrangements required to be filed as exhibits to this Form 10-K by Item 601(b)(10)(iii) of Regulation S-K. The Registrants have not filed the exhibits and schedules to Exhibit 2. The Registrants hereby agree to furnish supplementally a copy of any schedule omitted from Exhibit 2 to the SEC upon request.

The agreements included as exhibits are included only to provide information to investors regarding their terms.  The agreements listed below may contain representations, warranties and other provisions that were made, among other things, to provide the parties thereto with specified rights and obligations and to allocate risk among them, and such agreements should not be relied upon as constituting or providing any factual disclosures about us, any other persons, any state of affairs or other matters.

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
2(a)	—	Transaction Agreement dated July 21, 2004 among CenterPoint Energy, Utility Holding, LLC, NN Houston Sub, Inc., Texas Genco Holdings, Inc. (Texas Genco), HPC Merger Sub, Inc. and GC Power Acquisition LLC	CenterPoint Energy’s Form 8-K dated July 21, 2004	1-31447	10.1	X
2(b)**	—	Agreement and Plan of Merger, dated as of April 21, 2018, by and among Vectren Corporation, CenterPoint Energy, Inc. and Pacer Merger Sub, Inc.	CenterPoint Energy’s Form 8-K dated April 21, 2018	1-31447	2.1	X
2(c)(1)		Agreement and Plan of Merger among CERC, Houston Lighting and Power Company (“HL&P”), HI Merger, Inc. and NorAm Energy Corp. (“NorAm”) dated August 11, 1996	Houston Industries’ (“HI’s”) Form 8-K dated August 11, 1996	1-7629	2			X
2(c)(2)		Amendment to Agreement and Plan of Merger among CERC, HL&P, HI Merger, Inc. and NorAm dated August 11, 1996	Registration Statement on Form S-4	333-11329	2(c)			X
2(d)		Agreement and Plan of Merger dated December 29, 2000 merging Reliant Resources Merger Sub, Inc. with and into Reliant Energy Services, Inc.	Registration Statement on Form S-3	333-54526	2			X
2(e)		Master Formation Agreement dated March 14, 2013 by and among CenterPoint Energy, Inc., OGE Energy Corp., Bronco Midstream Holdings, LLC and Bronco Midstream Holdings II, LLC.	CenterPoint Energy’s Form 8-K dated March 14, 2013	1-31447	2.1	X		X
3(a)	—	Restated Articles of Incorporation of CenterPoint Energy	CenterPoint Energy’s Form 8-K dated July 24, 2008	1-31447	3.2	X

170

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
3(b)		Articles of Conversion of Reliant Energy Incorporated	Houston Electric’s Form 8-K dated August 31, 2002	1-3187	3(a)		X
3(c)	—	Restated Certificate of Formation of Houston Electric	Houston Electric’s Form 10-Q for the quarter ended June 30, 2011	1-3187	3.1		X
3(d)	—	Certificate of Incorporation of RERC Corp.	CERC Form 10-K for the year ended December 31, 1997	1-13265	3(a)(1)			X
3(e)	—	Certificate of Merger merging former NorAm Energy Corp. with and into HI Merger, Inc. dated August 6, 1997	CERC Form 10-K for the year ended December 31, 1997	1-13265	3(a)(2)			X
3(f)	—	Certificate of Amendment changing the name to Reliant Energy Resources Corp.	CERC Form 10-K for the year ended December 31, 1998	1-13265	3(a)(3)			X
3(g)	—	Certificate of Amendment changing the name to CenterPoint Energy Resources Corp.	CERC Form 10-Q for the quarter ended June 30, 2003	1-13265	3(a)(4)			X
3(h)	—	Third Amended and Restated Bylaws of CenterPoint Energy	CenterPoint Energy’s Form 8-K dated February 21, 2017	1-31447	3.1	X
3(i)	—	Amended and Restated Limited Liability Company Agreement of Houston Electric	Houston Electric’s Form 10-Q for the quarter ended June 30, 2011	1-3187	3.2		X
3(j)	—	Bylaws of RERC Corp.	CERC Form 10-K for the year ended December 31, 1997	1-13265	3(b)			X
3(k)	—	Statement of Resolutions Deleting Shares Designated Series A Preferred Stock of CenterPoint Energy	CenterPoint Energy’s Form 10-K for the year ended December 31, 2011	1-31447	3(c)	X
3(l)	—	Statement of Resolution Establishing Series of Shares Designated Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock of CenterPoint Energy	CenterPoint Energy’s Form 8-K dated August 22, 2018	1-31447	3.1	X

171

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
3(m)	—	Statement of Resolution Establishing Series of Shares designated 7.00% Series B Mandatory Convertible Preferred Stock of CenterPoint Energy	CenterPoint Energy’s Form 8-K dated September 25, 2018	1-31447	3.1	X
4(a)	—	Form of CenterPoint Energy Stock Certificate	CenterPoint Energy’s Registration Statement on Form S-4	333-69502	4.1	X
4(b)		Form of Certificate representing the Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock of CenterPoint Energy	CenterPoint Energy’s Form 8-K dated August 22, 2018	1-31447	4.1	X
4(c)		Form of Certificate representing the 7.00% Series B Mandatory Convertible Preferred Stock of CenterPoint Energy (included as Exhibit A to Exhibit 3(l))	CenterPoint Energy’s Form 8-K dated September 25, 2018	1-31447	4.1	X
4(d)		Deposit Agreement, dated as of October 1, 2018, among CenterPoint Energy and Broadridge Corporate Issuer Solutions, Inc., as Depositary, and the holders from time to time of the Depositary Receipts described therein	CenterPoint Energy’s Form 8-K dated September 25, 2018	1-31447	4.2	X
4(e)		Form of Depositary Receipt for the Depositary Shares (included as Exhibit A to Exhibit 4(d))	CenterPoint Energy’s Form 8-K dated September 25, 2018	1-31447	4.3	X
4(f)	—	Contribution and Registration Agreement dated December 18, 2001 among Reliant Energy, CenterPoint Energy and the Northern Trust Company, trustee under the Reliant Energy, Incorporated Master Retirement Trust	CenterPoint Energy’s Form 10-K for the year ended December 31, 2001	1-31447	4.3	X
4(g)(1)	—	Mortgage and Deed of Trust, dated November 1, 1944 between Houston Lighting and Power Company (HL&P) and Chase Bank of Texas, National Association (formerly, South Texas Commercial National Bank of Houston), as Trustee, as amended and supplemented by 20 Supplemental Indentures thereto	HL&P’s Form S-7 filed on August 25, 1977	2-59748	2(b)	X	X
4(g)(2)	—	Twenty-First through Fiftieth Supplemental Indentures to Exhibit 4(g)(1)	HL&P’s Form 10-K for the year ended December 31, 1989	1-3187	4(a)(2)	X	X

172

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
4(g)(3)	—	Fifty-First Supplemental Indenture to Exhibit 4(g)(1) dated as of March 25, 1991	HL&P’s Form 10-Q for the quarter ended June 30, 1991	1-3187	4(a)	X	X
4(g)(4)	—	Fifty-Second through Fifty-Fifth Supplemental Indentures to Exhibit 4(g)(1) each dated as of March 1, 1992	HL&P’s Form 10-Q for the quarter ended March 31, 1992	1-3187	4	X	X
4(g)(5)	—	Fifty-Sixth and Fifty-Seventh Supplemental Indentures to Exhibit 4(g)(1) each dated as of October 1, 1992	HL&P’s Form 10-Q for the quarter ended September 30, 1992	1-3187	4	X	X
4(g)(6)	—	Fifty-Eighth and Fifty-Ninth Supplemental Indentures to Exhibit 4(g)(1) each dated as of March 1, 1993	HL&P’s Form 10-Q for the quarter ended March 31, 1993	1-3187	4	X	X
4(g)(7)	—	Sixtieth Supplemental Indenture to Exhibit 4(g)(1) dated as of July 1, 1993	HL&P’s Form 10-Q for the quarter ended June 30, 1993	1-3187	4	X	X
4(g)(8)	—	Sixty-First through Sixty-Third Supplemental Indentures to Exhibit 4(g)(1) each dated as of December 1, 1993	HL&P’s Form 10-K for the year ended December 31, 1993	1-3187	4(a)(8)	X	X
4(g)(9)	—	Sixty-Fourth and Sixty-Fifth Supplemental Indentures to Exhibit 4(g)(1) each dated as of July 1, 1995	HL&P’s Form 10-K for the year ended December 31, 1995	1-3187	4(a)(9)	X	X
4(h)(1)	—	General Mortgage Indenture, dated as of October 10, 2002, between CenterPoint Energy Houston Electric, LLC and JPMorgan Chase Bank, as Trustee	Houston Electric’s Form 10-Q for the quarter ended September 30, 2002	1-3187	4(j)(1)	X	X
4(h)(2)	—	Second Supplemental Indenture to Exhibit 4(h)(1), dated as of October 10, 2002	Houston Electric’s Form 10- Q for the quarter ended September 30, 2002	1-3187	4(j)(3)	X	X
4(h)(3)	—	Third Supplemental Indenture to Exhibit 4(h)(1), dated as of October 10, 2002	Houston Electric’s Form 10-Q for the quarter ended September 30, 2002	1-3187	4(j)(4)	X	X
4(h)(4)	—	Officer’s Certificates dated October 10, 2002 setting forth the form, terms and provisions of the First through Eighth Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-K for the year ended December 31, 2003	1-31447	4(e)(10)	X	X

173

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
4(h)(5)	—	Ninth Supplemental Indenture to Exhibit 4(h)(1), dated as of November 12, 2002	CenterPoint Energy’s Form 10-K for the year ended December 31, 2002	1-31447	4(e)(10)	X	X
4(h)(6)	—	Tenth Supplemental Indenture to Exhibit 4(h)(1), dated as of March 18, 2003	CenterPoint Energy’s Form 8-K dated March 13, 2003	1-31447	4.1	X	X
4(h)(7)	—	Officer’s Certificate dated March 18, 2003 setting forth the form, terms and provisions of the Tenth Series and Eleventh Series of General Mortgage Bonds	CenterPoint Energy’s Form 8-K dated March 13, 2003	1-31447	4.2	X	X
4(h)(8)	—	Eleventh Supplemental Indenture to Exhibit 4(h)(1), dated as of May 23, 2003	CenterPoint Energy’s Form 8-K dated May 16, 2003	1-31447	4.2	X	X
4(h)(9)	—	Officer’s Certificate dated May 23, 2003 setting forth the form, terms and provisions of the Twelfth Series of General Mortgage Bonds	CenterPoint Energy’s Form 8-K dated May 16, 2003	1-31447	4.1	X	X
4(h)(10)	—	Twentieth Supplemental Indenture to Exhibit 4(h)(1), dated as of December 9, 2008	Houston Electric’s Form 8-K dated January 6, 2009	1-3187	4.2	X	X
4(h)(11)	—	Twenty-Second Supplemental Indenture to Exhibit 4(h)(1) dated as of August 10, 2012	CenterPoint Energy’s Form 10-K for the year ended December 31, 2012	1-31447	4(e)(33)	X	X
4(h)(12)	—	Officer’s Certificate, dated August 10, 2012 setting forth the form, terms and provisions of the Twenty-Second Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-K for the year ended December 31, 2012	1-31447	4(e)(34)	X	X
4(h)(13)	—	Twenty-Third Supplemental Indenture to Exhibit 4(h)(1) dated as of March 17, 2014	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2014	1-31447	4.10	X	X
4(h)(14)	—	Officer’s Certificate, dated as of March 17, 2014, setting forth the form, terms and provisions of the Twenty-Third Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2014	1-31447	4.11	X	X
4(h)(15)	—	Twenty-Fourth Supplemental Indenture to Exhibit 4(h)(1) dated as of May 18, 2016	CenterPoint Energy’s Form 10-Q for the quarter ended June 30, 2016	1-31447	4.5	X	X
4(h)(16)	—	Officer’s Certificate, dated as of May 18, 2016, setting forth the form, terms and provisions of the Twenty-Fifth Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-Q for the quarter ended June 30, 2016	1-31447	4.6	X	X

174

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
4(h)(17)	—	Twenty-Fifth Supplemental Indenture to Exhibit 4(h)(1) dated as of August 11, 2016	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2016	1-31447	4.5	X	X
4(h)(18)	—	Officer’s Certificate, dated as of August 11, 2016, setting forth the form, terms and provisions of the Twenty-Sixth Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2016	1-31447	4.6	X	X
4(h)(19)	—	Twenty-Sixth Supplemental Indenture to Exhibit 4(h)(1) dated as of January 12, 2017	CenterPoint Energy’s Form 10-K for the year ended December 31, 2016	1-31447	4(e)(41)	X	X
4(h)(20)	—	Officer’s Certificate, dated as of January 12, 2017, setting forth the form, terms and provisions of the Twenty-Seventh Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-K for the year ended December 31, 2016	1-31447	4(e)(42)	X	X
4(h)(21)	—	Twenty-Seventh Supplemental Indenture to Exhibit 4(h)(1) dated as of February 28, 2018	CenterPoint Energy’s Form 10-Q for the quarter ended March 30, 2018	1-31447	4.9	X	X
4(h)(22)	—	Officer’s Certificate, dated as of February 28, 2018, setting forth the form, terms and provisions of the Twenty-Eighth Series of General Mortgage Bonds	CenterPoint Energy’s Form 10-Q for the quarter ended March 30, 2018	1-31447	4.10	X	X
4(h)(23)		Twenty-Eighth Supplemental Indenture to Exhibit 4(h)(1) dated as of January 15, 2019	Houston Electric’s Form 8-K dated January 10, 2019	1-3187	4.4	X	X
†4(h)(24)	—	Officer’s Certificate, dated as of January 15, 2019, setting forth the form, terms and provisions of the Twenty-Ninth Series of General Mortgage Bonds				X	X
4(i)(1)	—	Indenture, dated as of February 1, 1998, between Reliant Energy Resources Corp. (RERC Corp.) and Chase Bank of Texas, National Association, as Trustee	CERC Corp.’s Form 8-K dated February 5, 1998	1-13265	4.1	X		X
4(i)(2)	—	Supplemental Indenture No. 10 to Exhibit 4(i)(1), dated as of February 6, 2007, providing for the issuance of CERC Corp.’s 6.25% Senior Notes due 2037	CenterPoint Energy’s Form 10-K for the year ended December 31, 2006	1-31447	4(f)(11)	X		X
4(i)(3)	—	Supplemental Indenture No. 12 to Exhibit 4(i)(1) dated as of October 23, 2007, providing for the issuance of CERC Corp.’s 6.625% Senior Notes due 2037	CenterPoint Energy’s Form 10-Q for the quarter ended June 30, 2008	1-31447	4.9	X		X

175

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
4(i)(4)	—	Supplemental Indenture No. 14 to Exhibit 4(i)(1) dated as of January 11, 2011, providing for the issuance of CERC Corp.’s 4.50% Senior Notes due 2021 and 5.85% Senior Notes due 2041	CenterPoint Energy’s Form 10-K for the year ended December 31, 2010	1-31447	4(f)(15)	X		X
4(i)(5)	—	Supplemental Indenture No. 15 to Exhibit 4(i)(1) dated as of January 20, 2011, providing for the issuance of  CERC Corp.’s 4.50% Senior Notes due 2021	CenterPoint Energy’s Form 10-K for the year ended December 31, 2010	1-31447	4(f)(16)	X		X
4(i)(6)	—	Supplemental Indenture No. 16 to Exhibit 4(i)(1) dated as of August 23, 2017, providing for the issuance of CERC Corp.’s 4.10% Senior Notes due 2047	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2017	1-31447	4.11	X		X
4(i)(7)	—	Supplemental Indenture No. 17 to Exhibit 4(i)(1) dated as of March 28, 2018, providing for the issuance of CERC Corp.’s 3.55% Senior Notes due 2023 and 4.00% Senior Notes due 2028	CERC’s Form 10-Q for the quarter ended March 31, 2018	1-13265	4.4	X		X
4(j)(1)	—	Indenture, dated as of May 19, 2003, between CenterPoint Energy and JPMorgan Chase Bank, as Trustee	CenterPoint Energy’s Form 8-K dated May 19, 2003	1-31447	4.1	X
4(j)(2)	—	Supplemental Indenture No. 9 to Exhibit 4(j)(1), dated as of August 10, 2017, providing for the issuance of CenterPoint Energy’s 2.50% Senior Notes due 2022	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2017	1-31447	4.9	X
4(j)(3)	—	Supplemental Indenture No. 10 to Exhibit 4(j)(1), dated as of October 5, 2018, providing for the issuance of CenterPoint Energy’s 3.60% Senior Notes due 2021, 3.85% Senior Notes due 2024 and 4.25% Senior Notes due 2028	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2018	1-31447	4.14	X
4(k)(1)	—	Subordinated Indenture dated as of September 1, 1999	Reliant Energy’s Form 8-K dated September 1, 1999	1-3187	4.1	X
4(k)(2)	—	Supplemental Indenture No. 1 dated as of September 1, 1999, between Reliant Energy and Chase Bank of Texas (supplementing Exhibit 4(k)(1) and providing for the issuance Reliant Energy’s 2% Zero-Premium Exchangeable Subordinated Notes Due 2029)	Reliant Energy’s Form 8-K dated September 15, 1999	1-3187	4.2	X
4(k)(3)	—	Supplemental Indenture No. 2 dated as of August 31, 2002, between CenterPoint Energy, Reliant Energy and JPMorgan Chase Bank (supplementing Exhibit 4(k)(1))	CenterPoint Energy’s Form 8-K12B dated August 31, 2002	1-31447	4(e)	X

176

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
4(k)(4)	—	Supplemental Indenture No. 3 dated as of December 28, 2005, between CenterPoint Energy, Reliant Energy and JPMorgan Chase Bank (supplementing Exhibit 4(k)(1))	CenterPoint Energy’s Form 10-K for the year ended December 31, 2005	1-31447	4(h)(4)	X
4(l)(1)	—	$1,600,000,000 Credit Agreement dated as of March 3, 2016, among CenterPoint Energy, as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated March 3, 2016	1-31447	4.1	X
4(l)(2)	—	First Amendment to Amended and Restated Credit Agreement, dated as of June 16, 2017, by and among CenterPoint Energy, as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated June 16, 2017	1-31447	4.1	X
4(l)(3)		Second Amendment to Amended and Restated Credit Agreement, dated as of May 25, 2018, by and among CenterPoint Energy, as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated May 25, 2018	1-31447	4.1	X
4(m)(1)	—	$300,000,000 Credit Agreement dated as of March 3, 2016, among Houston Electric, as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated March 3, 2016	1-31447	4.2	X	X
4(m)(2)	—	First Amendment to Credit Agreement, dated as of June 16, 2017, among Houston Electric, as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated June 16, 2017	1-31447	4.2	X	X
4(n)(1)	—	$600,000,000 Credit Agreement dated as of March 3, 2016, among CERC Corp., as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated March 3, 2016	1-31447	4.3	X		X
4(n)(2)	—	First Amendment to Credit Agreement, dated as of June 16, 2017, among CERC Corp., as Borrower, and the banks named therein	CenterPoint Energy’s Form 8-K dated June 16, 2017	1-31447	4.3	X		X

Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Registrants have not filed as exhibits to this Form 10-K certain long-term debt instruments, including indentures, under which the total amount of securities authorized does not exceed 10% of the total assets of the Registrants and its subsidiaries on a consolidated basis. The Registrants hereby agree to furnish a copy of any such instrument to the SEC upon request.

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
*10(a)	—	CenterPoint Energy, Inc. 1991 Benefit Restoration Plan, as amended and restated effective as of February 25, 2011	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2011	1-31447	10.3	X

177

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
*10(b)(1)	—	CenterPoint Energy Benefit Restoration Plan, effective as of January 1, 2008	CenterPoint Energy’s Form 8-K dated December 22, 2008	1-31447	10.1	X
*10(b)(2)	—	First Amendment to Exhibit 10(b)(1), effective as of February 25, 2011	CenterPoint Energy’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011	1-31447	10.4	X
*10(c)	—	CenterPoint Energy 1985 Deferred Compensation Plan, as amended and restated effective January 1, 2003	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2003	1-31447	10.1	X
*10(d)(1)	—	Amended and Restated CenterPoint Energy, Inc. 1991 Savings Restoration Plan, effective as of January 1, 2008	CenterPoint Energy’s Form 8-K dated December 22, 2008	1-31447	10.4	X
*10(d)(2)	—	First Amendment to Exhibit 10(d)(1), effective as of February 25, 2011	CenterPoint Energy’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011	1-31447	10.5	X
*10(e)(1)	—	CenterPoint Energy Savings Restoration Plan, effective as of January 1, 2008	CenterPoint Energy’s Form 8-K dated December 22, 2008	1-31447	10.3	X
*10(e)(2)	—	First Amendment to Exhibit 10(e)(1), effective as of February 25, 2011	CenterPoint Energy’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011	1-31447	10.6	X
*10(f)	—	CenterPoint Energy Executive Life Insurance Plan, as amended and restated effective June 18, 2003	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2003	1-31447	10.5	X
10(g)(1)	—	Stockholder’s Agreement dated as of July 6, 1995 between Houston Industries Incorporated and Time Warner Inc.	Schedule 13-D dated July 6, 1995	5-19351	2	X
10(g)(2)	—	Amendment to Exhibit 10(g)(1) dated November 18, 1996	HI’s Form 10-K for the year ended December 31, 1996	1-7629	10(x)(4)	X
†10(h)	—	Summary of Certain Compensation Arrangements of the Executive Chairman of the Board				X
10(i)(1)	—	Master Separation Agreement entered into as of December 31, 2000 between Reliant Energy, Incorporated and Reliant Resources, Inc.	Reliant Energy’s Form 10-Q for the quarter ended March 31, 2001	1-3187	10.1	X

178

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
10(i)(2)	—	First Amendment to Exhibit 10(i)(1) effective as of February 1, 2003	CenterPoint Energy’s Form 10-K for the year ended December 31, 2002	1-31447	10(bb)(5)	X
10(i)(3)	—	Employee Matters Agreement, entered into as of December 31, 2000, between Reliant Energy, Incorporated and Reliant Resources, Inc.	Reliant Energy’s Form 10-Q for the quarter ended March 31, 2001	1-3187	10.5	X
10(i)(4)	—	Retail Agreement, entered into as of December 31, 2000, between Reliant Energy, Incorporated and Reliant Resources, Inc.	Reliant Energy’s Form 10-Q for the quarter ended March 31, 2001	1-3187	10.6	X
10(i)(5)	—	Tax Allocation Agreement, entered into as of December 31, 2000, between Reliant Energy, Incorporated and Reliant Resources, Inc.	Reliant Energy’s Form 10-Q for the quarter ended March 31, 2001	1-3187	10.8	X
10(j)(1)	—	Separation Agreement entered into as of August 31, 2002 between CenterPoint Energy and Texas Genco	CenterPoint Energy’s Form 10-K for the year ended December 31, 2002	1-31447	10(cc)(1)	X
10(j)(2)	—	Transition Services Agreement, dated as of August 31, 2002, between CenterPoint Energy and Texas Genco	CenterPoint Energy’s Form 10-K for the year ended December 31, 2002	1-31447	10(cc)(2)	X
10(j)(3)	—	Tax Allocation Agreement, dated as of August 31, 2002, between CenterPoint Energy and Texas Genco	CenterPoint Energy’s Form 10-K for the year ended December 31, 2002	1-31447	10(cc)(3)	X
*10(k)(1)	—	CenterPoint Energy, Inc. Deferred Compensation Plan, as amended and restated effective January 1, 2003	CenterPoint Energy’s Form 10-Q for the quarter ended June 30, 2003	1-31447	10.2	X
*10(k)(2)	—	First Amendment to Exhibit 10(k)(1) effective as of January 1, 2008	CenterPoint Energy’s Form 8-K dated February 20, 2008	1-31447	10.4	X
*10(l)(1)	—	CenterPoint Energy 2005 Deferred Compensation Plan, effective January 1, 2008	CenterPoint Energy’s Form 8-K dated February 20, 2008	1-31447	10.3	X
*10(l)(2)	—	Amended and Restated CenterPoint Energy 2005 Deferred Compensation Plan, effective January 1, 2009	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2008	1-31447	10.1	X
†*10(m)	—	CenterPoint Energy Short Term Incentive Plan, as amended and restated effective January 1, 2019				X

179

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
*10(n)	—	Amended and Restated CenterPoint Energy Stock Plan for Outside Directors	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.1	X
10(o)	—	City of Houston Franchise Ordinance	CenterPoint Energy’s Form 10-Q for the quarter ended June 30, 2005	1-31447	10.1	X	X
10(p)(1)	—	Amended and Restated HL&P Executive Incentive Compensation Plan effective as of January 1, 1985	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2008	1-31447	10.2	X
10(p)(2)	—	First Amendment to Exhibit 10(p)(1) effective as of January 1, 2008	CenterPoint Energy’s Form 10-Q for the quarter ended September 30, 2008	1-31447	10.3	X
*10(q)(1)	—	CenterPoint Energy, Inc. 2009 Long Term Incentive Plan	CenterPoint Energy’s Schedule 14A dated March 13, 2009	1-31447	A	X
*10(q)(2)	—	Form of Performance Award Agreement for 20XX - 20XX Performance Cycle under Exhibit 10(q)(1)	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.3	X
*10(q)(3)	—	Form of Performance Award Agreement for Executive Chairman 20XX - 20XX Performance Cycle under Exhibit 10(q)(1)	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.4	X
*10(q)(4)	—	Form of Restricted Stock Unit Award Agreement (With Performance Goal) under Exhibit 10(q)(1)	CenterPoint Energy’s Form 8-K dated February 28, 2012	1-31447	10.2	X
*10(q)(5)	—	Form of Restricted Stock Unit Award Agreement (Service-Based Vesting) under Exhibit 10(q)(1)	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.5	X
*10(q)(6)	—	Form of Restricted Stock Unit Award Agreement (Retention, Service-Based Vesting) under Exhibit 10(q)(1)	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.6	X
*10(q)(7)	—	Form of Executive Chairman Restricted Stock Unit Award Agreement (Service-Based Vesting) under Exhibit 10(q)(1)	CenterPoint Energy’s Form 10-Q for the quarter ended March 31, 2018	1-31447	10.7	X
†10(r)	—	Summary of Non-Employee Director Compensation				X
†10(s)	—	Summary of Senior Executive Officer Compensation				X

180

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
10(t)	—	Change in Control Plan	CenterPoint Energy’s Form 8-K dated April 27, 2017	1-31447	10.1	X
10(u)	—	Omnibus Amendment to CenterPoint Energy, Inc. Benefit Plans, dated May 23, 2013	CenterPoint Energy’s Form 10-K for the year ended December 31, 2013	1-31447	10(zz)	X
10(v)	—	Master Formation Agreement, dated as of March 14, 2013, among CenterPoint Energy, OGE, Bronco Midstream Holdings, LLC and Bronco Midstream Holdings II, LLC	CenterPoint Energy’s Form 8-K dated March 14, 2013	1-31447	2.1	X
10(w)	—	Fifth Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP, dated November 14, 2017	CenterPoint Energy’s Form 8-K dated November 14, 2017	1-31447	10.1	X
10(x)	—	Third Amended and Restated Limited Liability Company Agreement of Enable GP, LLC dated June 22, 2016	CenterPoint Energy’s Form 8-K dated June 22, 2016	1-31447	10.2	X
10(y)	—	Registration Rights Agreement dated as of May 1, 2013 by and among CenterPoint Energy Field Services (CEFS), CERC Corp., OGE Enogex Holdings LLC, and Enogex Holdings LLC	CenterPoint Energy’s Form 8-K dated May 1, 2013	1-31447	10.3	X
10(z)	—	Omnibus Agreement dated as of May 1, 2013 among CenterPoint Energy, OGE, Enogex Holdings LLC and CEFS	CenterPoint Energy’s Form 8-K dated May 1, 2013	1-31447	10.4	X
10(aa)		Indenture, dated as of May 27, 2014, between Enable Midstream Partners, LP and U.S. Bank National Association, as trustee	CERC’s Form 8-K dated May 27, 2014	1-13265	10.1			X
10(bb)		First Supplemental Indenture, dated as of May 27, 2014, among Enable Midstream Partners, LP, CenterPoint Energy Resources Corp., as guarantor, and U.S. Bank National Association, as trustee	CERC’s Form 8-K dated May 27, 2014	1-13265	10.2			X
10(cc)		Registration Rights Agreement, dated as of May 27, 2014, by and among Enable Midstream Partners, LP, CenterPoint Energy Resources Corp., as guarantor, and RBS Securities Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Credit Suisse Securities (USA) LLC, and RBC Capital Markets, LLC, as representatives of the initial purchasers	CERC’s Form 8-K dated May 27, 2014	1-13265	10.3			X

181

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
10(dd)	—	Purchase Agreement dated January 28, 2016, by and between Enable Midstream Partners, LP and CenterPoint Energy, Inc.	CenterPoint Energy’s Form 8-K dated January 28, 2016	1-31447	10.1	X
10(ee)	—	Registration Rights Agreement dated as of February 18, 2016 by and between Enable Midstream Partners, LP and CenterPoint Energy, Inc.	CenterPoint Energy’s Form 8-K dated February 18, 2016	1-31447	10.2	X
10(ff)		Commitment Letter, dated as of April 21, 2018, by Goldman Sachs Bank USA and Morgan Stanley Senior Funding, Inc. to CenterPoint Energy, Inc.	CenterPoint Energy’s Form 8-K dated April 21, 2018	1-31447	10.1	X
†21	—	Subsidiaries of CenterPoint Energy				X
†23.1.1	—	Consent of Deloitte & Touche LLP				X
†23.1.2	—	Consent of Deloitte & Touche LLP					X
†23.1.3	—	Consent of Deloitte & Touche LLP						X
†23.2	—	Consent of Deloitte & Touche LLP, Independent Registered Public Accounting Firm of Enable Midstream Partners, LP				X
†31.1.1	—	Rule 13a-14(a)/15d-14(a) Certification of Scott M. Prochazka				X
†31.1.2	—	Rule 13a-14(a)/15d-14(a) Certification of Scott M. Prochazka					X
†31.1.3	—	Rule 13a-14(a)/15d-14(a) Certification of Scott M. Prochazka						X
†31.2.1	—	Rule 13a-14(a)/15d-14(a) Certification of William D. Rogers				X
†31.2.2	—	Rule 13a-14(a)/15d-14(a) Certification of William D. Rogers					X
†31.2.3	—	Rule 13a-14(a)/15d-14(a) Certification of William D. Rogers						X
†32.1.1	—	Section 1350 Certification of Scott M. Prochazka				X
†32.1.2	—	Section 1350 Certification of Scott M. Prochazka					X
†32.1.3	—	Section 1350 Certification of Scott M. Prochazka						X
†32.2.1	—	Section 1350 Certification of William D. Rogers				X
†32.2.2	—	Section 1350 Certification of William D. Rogers					X
†32.2.3	—	Section 1350 Certification of William D. Rogers						X

182

Exhibit Number		Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference	CenterPoint Energy	Houston Electric	CERC
99.1	—	Financial Statements of Enable Midstream Partners, LP as of December 31, 2018 and 2017 and for the years ended December 31, 2018, 2017and 2016	Part II, Item 8 of Enable Midstream Partners, LP’s Form 10-K for the year ended December 31, 2018	001-36413	Item 8	X
†101.INS	—	XBRL Instance Document				X	X	X
†101.SCH	—	XBRL Taxonomy Extension Schema Document				X	X	X
†101.CAL	—	XBRL Taxonomy Extension Calculation Linkbase Document				X	X	X
†101.DEF	—	XBRL Taxonomy Extension Definition Linkbase Document				X	X	X
†101.LAB	—	XBRL Taxonomy Extension Labels Linkbase Document				X	X	X
†101.PRE	—	XBRL Taxonomy Extension Presentation Linkbase Document				X	X	X

**Schedules to this agreement have been omitted pursuant to Item 601(b)(2) of Regulation S-K. A copy of any omitted schedules will be furnished supplementally to the SEC upon request; provided, however, that the parties may request confidential treatment pursuant to Rule 24b-2 of the Exchange Act for any document so furnished.

183

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized, in the City of Houston, the State of Texas, on the 28th day of February, 2019.

CENTERPOINT ENERGY, INC.

(Registrant)

By:  /s/ Scott M. Prochazka

Scott M. Prochazka

President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on February 28, 2019.

Signature	Title
/s/  SCOTT M. PROCHAZKA	President, Chief Executive Officer and
Scott M. Prochazka	Director (Principal Executive Officer and Director)
/s/  WILLIAM D. ROGERS	Executive Vice President and Chief
William D. Rogers	Financial Officer (Principal Financial Officer)
/s/  KRISTIE L. COLVIN	Senior Vice President and Chief
Kristie L. Colvin	Accounting Officer (Principal Accounting Officer)
/s/  MILTON CARROLL	Executive Chairman of the Board of Directors
Milton Carroll
/s/  LESLIE D. BIDDLE	Director
Leslie D. Biddle
/s/  SCOTT J. MCLEAN	Director
Scott J. McLean
/s/  MARTIN H. NESBITT	Director
Martin H. Nesbitt
/s/  THEODORE F. POUND	Director
Theodore F. Pound
/s/  SUSAN O. RHENEY	Director
Susan O. Rheney
/s/  PHILLIP R. SMITH	Director
Phillip R. Smith
/s/  JOHN W. SOMERHALDER II	Director
John W. Somerhalder II
/s/  PETER S. WAREING	Director
Peter S. Wareing

184

	CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
	(Registrant)
By:	/s/ SCOTT M. PROCHAZKA
	Scott M. Prochazka
	Manager

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on February 28, 2019.

Signature	Title
/s/ SCOTT M. PROCHAZKA	Manager and Chairman
(Scott M. Prochazka)	(Principal Executive Officer)
/s/ WILLIAM D. ROGERS	Executive Vice President and Chief Financial Officer
(William D. Rogers)	(Principal Financial Officer)
/s/ KRISTIE L. COLVIN	Senior Vice President and Chief Accounting Officer
(Kristie L. Colvin)	(Principal Accounting Officer)

	CENTERPOINT ENERGY RESOURCES CORP.
	(Registrant)
By:	/s/ SCOTT M. PROCHAZKA
	Scott M. Prochazka
	President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on February 28, 2019.

Signature	Title
/s/ SCOTT M. PROCHAZKA	Chairman, President and Chief Executive Officer
(Scott M. Prochazka)	(Principal Executive Officer and Director)
/s/ WILLIAM D. ROGERS	Executive Vice President and Chief Financial Officer
(William D. Rogers)	(Principal Financial Officer)
/s/ KRISTIE L. COLVIN	Senior Vice President and Chief Accounting Officer
(Kristie L. Colvin)	(Principal Accounting Officer)

185

EX-4.(H)(24)

Exhibit 4(h)(24)

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
OFFICER’S CERTIFICATEJanuary 15, 2019

I, the undersigned officer of CenterPoint Energy Houston Electric, LLC, a Texas limited liability company (the “Company”), do hereby certify that I am an Authorized Officer of the Company as such term is defined in the Indenture (as defined herein). I am delivering this certificate pursuant to the authority granted in the Resolutions adopted by written consent of the sole Manager of the Company dated January 4, 2019, and Sections 105, 201, 301, 401(1), 401(5), 403(2)(B) and 1403 of the General Mortgage Indenture, dated as of October 10, 2002, as heretofore supplemented to the date hereof (as heretofore supplemented, the “Indenture”), between the Company and The Bank of New York Mellon Trust Company, National Association (successor in trust to JPMorgan Chase Bank), as Trustee (the “Trustee”). Terms used herein and not otherwise defined herein shall have the meanings assigned to them in the Indenture, unless the context clearly requires otherwise. Based upon the foregoing, I hereby certify on behalf of the Company as follows:

1.    The terms and conditions of the Securities of the series described in this Officer’s Certificate are as follows (the numbered subdivisions set forth in this Paragraph 1 corresponding to the numbered subdivisions of Section 301 of the Indenture):

(1)    The Securities of the twenty-ninth series to be issued under the Indenture shall be designated as the “4.25% General Mortgage Bonds, Series AC, due 2049” (the “Bonds”), as set forth in the Twenty-Eighth Supplemental Indenture, dated as of the date hereof, between the Company and the Trustee.

(2)    The Trustee shall authenticate and deliver the Bonds for original issue on January 15, 2019 (the “Issue Date”) in the aggregate principal amount of $700,000,000, upon a Company Order for the authentication and delivery thereof and satisfaction of Section 401 of the Indenture.

(3)    Interest on the Bonds shall be payable to the Persons in whose names such Securities are registered at the close of business on the Regular Record Date for such interest (as specified in (5) below), except as otherwise expressly provided in the form of such Securities attached hereto as Exhibit A.

(4)    The Bonds shall mature and the principal thereof shall be due and payable together with all accrued and unpaid interest thereon on February 1, 2049.

(5)    The Bonds shall bear interest at the rate of 4.25% per annum. Interest shall accrue on the Bonds from the Issue Date, or the most recent date to which interest has been paid or duly provided for. The Interest Payment Dates for the Bonds shall be February 1 and August 1 in each year commencing August 1, 2019, and the Regular Record Dates with respect to the Interest Payment Dates for the Bonds shall be the January 15 and July 15, respectively, immediately preceding each Interest Payment Date (whether or not a Business

Day); provided however that interest payable at maturity, upon redemption or when principal is otherwise due will be payable to the Holder to whom principal is payable.

(6)    The Corporate Trust Office of The Bank of New York Mellon Trust Company, National Association in New York, New York shall be the place at which (i) the principal of and premium, if any, and interest on the Bonds shall be payable, (ii) registration of transfer of the Bonds may be effected, (iii) exchanges of the Bonds may be effected, and (iv) notices and demands to or upon the Company in respect of the Bonds and the Indenture may be served; and The Bank of New York Mellon Trust Company, National Association shall be the Security Registrar and Paying Agent for the Bonds; provided, however, that the Company reserves the right to change, by one or more Officer’s Certificates, any such place or the Security Registrar; and provided, further, that the Company reserves the right to designate, by one or more Officer’s Certificates, its principal office in Houston, Texas as any such place or itself as the Security Registrar; provided, however, that there shall be only a single Security Registrar for each series of Bonds.

(7)    The Bonds shall be redeemable, at the option of the Company, at any time or from time to time, in whole or in part, on any date prior to August 1, 2048 at a redemption price equal to the greater of (i) 100% of the principal amount of the Bonds to be redeemed or (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the Bonds to be redeemed that would be due if the Bonds matured on August 1, 2048 but for the redemption (not including any portion of such payments of interest accrued to the Redemption Date) discounted to the date of redemption (the “Redemption Date”) on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the applicable Treasury Rate plus 20 basis points; plus, in each case, accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date. On or after August 1, 2048, the Company may redeem the Bonds, at any time or from time to time, in whole or in part, by paying 100% of the principal amount of Bonds to be redeemed plus accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date.

“Treasury Rate” means, with respect to any Redemption Date, the yield calculated on the third Business Day preceding the Redemption Date, as follows: for the latest day that appears in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily) - H.15” (or any successor publication) (“H.15”) under the caption “Treasury Constant Maturities - Nominal”, the Independent Investment Banker shall select two yields – one for the maturity immediately before and one for the maturity immediately after the remaining maturity of the notes (assuming the notes matured on August 1, 2048) – and shall interpolate on a straight-line basis using such yields; if there is no such maturity either before or after, the Independent Investment Banker shall select the maturity closest to August 1, 2048 that appears on the release; or if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated by the Independent Investment Banker using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury

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Price for such Redemption Date. The Treasury Rate will be calculated by the Independent Investment Banker on the third Business Day preceding the Redemption Date.

“Comparable Treasury Issue” means the U.S. Treasury security selected by an Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term (“remaining life”) of the Bonds to be redeemed (assuming for this purpose that the Bonds matured on August 1, 2048) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of such Bonds.

“Comparable Treasury Price” means (1) the average of five Reference Treasury Dealer Quotations for such Redemption Date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Independent Investment Banker obtains fewer than five such Reference Treasury Dealer Quotations, the average of all such quotations.

“Independent Investment Banker” means one of Mizuho Securities USA LLC, PNC Capital Markets LLC, Regions Securities LLC, TD Securities (USA) LLC or U.S. Bancorp Investments, Inc., as specified by the Company, or if these firms are unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Company.

“Reference Treasury Dealer” means each of (1) Mizuho Securities USA LLC, TD Securities (USA) LLC and a primary U.S. government securities dealer in the United States of America (a “Primary Treasury Dealer”) designated by each of PNC Capital Markets LLC, Regions Securities LLC and U.S. Bancorp Investments, Inc. and their respective successors; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury Dealer and (2) any other Primary Treasury Dealer selected by the Company after consultation with the Independent Investment Banker.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at 5:00 p.m., New York City time, on the third Business Day preceding such Redemption Date.

The Trustee, at the written direction of the Company, will send a notice of redemption to each holder of Bonds to be redeemed by first-class mail (or in accordance with the procedures of The Depository Trust Company with respect to Bonds registered in the name of Cede & Co.) at least 15 and not more than 60 days prior to the date fixed for redemption. Unless the Company defaults on payment of the redemption price, interest will cease to accrue on the Bonds or portions thereof called for redemption on the Redemption Date. If fewer than all of the Bonds are to be redeemed, not more than 60 days prior to the Redemption Date, the particular Bonds or portions thereof called for redemption will be selected from the outstanding Bonds not previously called by such method as the Trustee deems fair and appropriate. The Trustee may select for redemption Bonds and portions of Bonds in amounts

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of $2,000 or whole multiples of $1,000. In the case of a partial redemption of Bonds registered in the name of Cede & Co, the Bonds to be redeemed will be determined in accordance with the procedures of The Depository Trust Company.

(8)    Not applicable.

(9)    The Bonds will be issued in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

(10)    Not applicable.

(11)    Not applicable.

(12)    Not applicable.

(13)    See subsection (7) above.

(14)    Not applicable.

(15)    Not applicable.

(16)    Not applicable.

(17)    The Bonds shall be issuable in whole or in part in the form of one or more Global Securities (as defined below). The Depository Trust Company shall initially serve as Depositary (as defined below) with respect to the Global Securities. “Depositary” means, with respect to Securities of any series issuable in whole or in part in the form of one or more Global Securities, a clearing agency registered under the Exchange Act that is designated to act as depositary for such Securities. “Global Security” means a Security that evidences all or part of the Securities of a series and bears a legend in substantially the following form:

THIS SECURITY IS IN GLOBAL FORM AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY.

The provisions of Clauses (1), (2), (3) and (4) below shall apply only to Global Securities:

(1) Each Global Security authenticated under the Indenture shall be registered in the name of the Depositary designated for such Global Security or a nominee thereof and delivered to such Depositary or a nominee thereof or custodian therefor, and each such Global Security shall constitute a single Security for all purposes of the Indenture.

(2) Notwithstanding any other provision in the Indenture, no Global Security may be exchanged in whole or in part for Securities registered, and no transfer of a Global Security in whole or in part may be registered, in the name of any Person other than the Depositary

4

for such Global Security or a nominee thereof unless (A) the Company has notified the Trustee that the Depositary is unwilling or unable to continue as Depositary for such Global Security, the Depositary defaults in the performance of its duties as Depositary, or the Depositary has ceased to be a clearing agency registered under the Exchange Act, in each case, unless the Company has approved a successor Depositary within 90 days, (B) the Company in its sole discretion determines that such Global Security will be so exchangeable or transferable or (C) there shall exist such circumstances, if any, in addition to or in lieu of the foregoing as have been specified for this purpose as contemplated by the Indenture.

(3) Subject to Clause (2) above, any exchange of a Global Security for other Securities may be made in whole or in part, and all Securities issued in exchange for a Global Security or any portion thereof shall be registered in such names as the Depositary for such Global Security shall direct.

(4) Every Security authenticated and delivered upon registration of transfer of, or in exchange for or in lieu of, a Global Security or any portion thereof, whether pursuant to Sections 304, 305, 306, 507 or 1406 of the Indenture or otherwise, shall be authenticated and delivered in the form of, and shall be, a Global Security, unless such Security is registered in the name of a Person other than the Depositary for such Global Security or a nominee thereof.

(18)    Not applicable.

(19)    Not applicable.

(20)    For purposes of the Bonds, “Business Day” shall mean any day, other than Saturday or Sunday, on which commercial banks and foreign exchange markets are open for business, including dealings in deposits in U.S. dollars, in New York, New York.

(21)    Not applicable.

(22)    The Bonds shall have such other terms and provisions as are provided in the forms thereof attached hereto as Exhibit A, and shall be issued in substantially such forms.

2.    The undersigned has read all of the covenants and conditions contained in the Indenture, and the definitions in the Indenture relating thereto, relating to the authentication, delivery and issuance of the Bonds and the execution and delivery of the Twenty-Eighth Supplemental Indenture and in respect of compliance with which this certificate is made.

3.    The statements contained in this certificate are based upon the familiarity of the undersigned with the Indenture, the documents accompanying this certificate, and upon discussions by the undersigned with officers and employees of the Company familiar with the matters set forth herein.

4.    In the opinion of the undersigned, she has made such examination or investigation as is necessary to enable her to express an informed opinion as to whether or not such covenants and conditions have been complied with.

5.    In the opinion of the undersigned, such conditions and covenants have been complied with.

6.    To my knowledge, no Event of Default has occurred and is continuing.

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7.    The execution of the Twenty-Eighth Supplemental Indenture, dated as of the date hereof, between the Company and the Trustee is authorized or permitted by the Indenture.

8.    With respect to Section 403(2)(B) of the Indenture, General Mortgage Bonds, due March 15, 2013, having an aggregate principal amount of $62,895,000 out of an aggregate principal amount of $62,895,000 remaining from the $450,000,000 original aggregate principal amount, General Mortgage Bonds, due March 1, 2017, having an aggregate principal amount of $43,820,000 out of an aggregate principal amount of $43,820,000 remaining from the $43,820,000 original aggregate principal amount, and General Mortgage Bonds, due December 1, 2017, having an aggregate principal amount of $83,565,000 out of an aggregate principal amount of $83,565,000 remaining from the $83,565,000 original aggregate principal amount (the “Retired Mortgage Bonds”), have heretofore been authenticated and delivered and as of the date of this certificate, constitute Retired Securities. $190,280,000 aggregate principal amount of such Retired Mortgage Bonds are the basis for the authentication and delivery of $190,280,000 aggregate principal amount of the Bonds.

9.    With respect to Section 402(2)(B) of the Indenture, Property Additions of $5,810,090,785.45 are the basis for authentication and delivery of $509,720,000 aggregate principal amount of the Bonds.

10.    The First Mortgage Collateralization Date has not occurred.

11.    No certificate of an Independent Accountant pursuant to Section 104 of the Indenture is required in connection with the authentication and delivery of the Bonds because (i) the Net Earnings Certificate covers a period different from that required to be covered by annual reports required to be filed by the Company and (ii) an Independent Accountant has provided the Company with a letter addressed to the Company containing the results of procedures on financial information included in the Net Earnings Certificate that are agreed upon by the Authorized Officer signing the Net Earnings Certificate.

12.     Pursuant to the resolutions adopted by the Sole Manager of the Company by written consent on January 4, 2019, Carla A. Kneipp, Vice President and Treasurer, has been named an Authorized Officer, as defined under the Indenture, including for purposes of executing the Net Earnings Certificate.

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IN WITNESS WHEREOF, the undersigned has executed this Officer’s Certificate as of the date first written above.

	/s/ Carla A. Kneipp
	Carla A. Kneipp
	Vice President and Treasurer
Acknowledged and Received as
of the date first written above
THE BANK OF NEW YORK
MELLON TRUST COMPANY,
NATIONAL ASSOCIATION,
As Trustee
/s/ Julie Hoffman-Ramos
Julie Hoffman-Ramos
Vice President

Signature Page to Officer’s Certificate Under the Indenture

EXHIBIT A
FORM OF BONDS

THIS SECURITY IS IN GLOBAL FORM AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY.

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to CenterPoint Energy Houston Electric, LLC or its agent for registration of transfer, exchange, or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein.

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC4.25% General Mortgage Bonds, Series AC, due 2049

Original Interest Accrual Date: January 15, 2019 Stated Maturity: February 1, 2049 Interest Rate: 4.25% Interest Payment Dates: February 1 and August 1 Regular Record Dates: January 15 and July 15 immediately preceding the respective Interest Payment Date Redeemable: Yes [X] No [ ] Redemption Date: At any time. Redemption Price: on any date prior to August 1, 2048 at a price equal to the greater of (i) 100% of the principal amount of this Security or the portion hereof to be redeemed or (ii) the sum of the present values of the remaining scheduled payments of principal and interest on this Security or the portion thereof to be redeemed that would be due if this Security matured on August 1, 2048 but for the redemption (not including any portion of such payments of interest accrued to the Redemption Date) discounted to the Redemption Date on a semiannual basis at the applicable Treasury Rate plus 20 basis points; plus, in each case, accrued and unpaid interest to the Redemption Date on the principal amount being redeemed; or on or after August 1, 2048, at a price equal to 100% of the principal amount of this Security or the portion thereof to be redeemed plus accrued and unpaid interest to the Redemption Date on the principal amount being redeemed.

This Security is not an Original Issue Discount Security
within the meaning of the within-mentioned Indenture.
_____________________________

Principal Amount    Registered No. T-1

$500,000,000*    CUSIP  15189X AT5

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC, a limited liability company duly organized and existing under the laws of the State of Texas (herein called the “Company,” which term includes any successor under the Indenture referred to below), for value received, hereby promises to pay to

***CEDE & Co.***

_________________

*Reference is made to Schedule A attached hereto with respect to decreases and increases in the aggregate principal amount of Securities evidenced hereby.

, or its registered assigns, the principal sum of FIVE HUNDRED MILLION DOLLARS, on the Stated Maturity specified above, and to pay interest thereon from the Original Interest Accrual Date specified above or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on the Interest Payment Dates specified above in each year, commencing on August 1, 2019, and at Maturity, at the Interest Rate per annum specified above, until the principal hereof is paid or duly provided for. The interest so payable, and paid or duly provided for, on any Interest Payment Date shall, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date specified above (whether or not a Business Day) next preceding such Interest Payment Date. Notwithstanding the foregoing, interest payable at Maturity shall be paid to the Person to whom principal shall be paid. Except as otherwise provided in said Indenture, any such interest not so paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice of which shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Payment of the principal of and premium, if any, on this Security and interest hereon at Maturity shall be made upon presentation of this Security at the office of the Corporate Trust Administration of The Bank of New York Mellon Trust Company, National Association, located in New York, New York or at such other office or agency as may be designated for such purpose by the Company from time to time. Payment of interest on this Security (other than interest at Maturity) shall be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register, except that if such Person shall be a securities depositary, such payment may be made by such other means in lieu of check, as shall be agreed upon by the Company, the Trustee and such Person. Payment of the principal of and premium, if any, and interest on this Security, as aforesaid, shall be made in such coin or currency of the United States of America as at the time of payment shall be legal tender for the payment of public and private debts.

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and issuable in one or more series under and equally secured by a General Mortgage Indenture, dated as of October 10, 2002, as supplemented and amended (such Indenture as originally executed and delivered and as supplemented or amended from time to time thereafter, together with any constituent instruments establishing the terms of particular Securities, being herein called the “Indenture”), between the Company and The Bank of New York Mellon Trust Company, National Association (successor in trust to JPMorgan Chase Bank), trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a description of the property mortgaged, pledged and held in trust, the nature and extent of the security and the respective rights, limitations of rights, duties and immunities of the Company, the Trustee and the Holders of the Securities thereunder and of the terms and conditions upon which the Securities are, and are to be, authenticated and delivered and secured. The acceptance of this Security shall be deemed to

constitute the consent and agreement by the Holder hereof to all of the terms and provisions of the Indenture. This Security is one of the series designated above.

If any Interest Payment Date, any Redemption Date or the Stated Maturity shall not be a Business Day (as hereinafter defined), payment of the amounts due on this Security on such date may be made on the next succeeding Business Day; and, if such payment is made or duly provided for on such Business Day, no interest shall accrue on such amounts for the period from and after such Interest Payment Date, Redemption Date or Stated Maturity, as the case may be, to such Business Day. Interest will be computed on the basis of a 360-day year of twelve 30-day months.

This Security is subject to redemption, at the option of the Company, at any time or from time to time, in whole or in part, on any date prior to August 1, 2048 at a price equal to the greater of (i) 100% of the principal amount of this Security (or the portion hereof to be redeemed) or (ii) the sum of the present values of the remaining scheduled payments of principal and interest on this Security (or such portion to be redeemed) that would be due if this Security (or such portion to be redeemed) matured on August 1, 2048 but for the redemption (not including any portion of such payments of interest accrued to the Redemption Date) discounted to the Redemption Date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the applicable Treasury Rate plus 20 basis points; plus, in each case, accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date. On or after August 1, 2048, the Company may redeem this Security, at any time or from time to time, in whole or in part, by paying 100% of the principal amount of this Security (or such portion to be redeemed) plus accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date. The Trustee shall have no responsibility for the calculation of such amount.

“Treasury Rate” means, with respect to any Redemption Date the yield calculated on the third business day preceding the Redemption Date, as follows: for the latest day that appears in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily) - H.15” (or any successor publication) (“H.15”) under the caption “Treasury Constant Maturities - Nominal”, the independent investment banker shall select two yields – one for the maturity immediately before and one for the maturity immediately after the remaining maturity of the notes (assuming the notes matured on August 1, 2048) – and shall interpolate on a straight-line basis using such yields; if there is no such maturity either before or after, the independent investment banker shall select the maturity closest to August 1, 2048 that appears on the release; or if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated by the Independent Investment Banker using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such Redemption Date. The Treasury Rate will be calculated by the Independent Investment Banker on the third Business Day preceding the Redemption Date.

“Comparable Treasury Issue” means the U.S. Treasury security selected by an Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term (“remaining life”) of this Security to be redeemed (assuming for this purpose that

this Security matured on August 1, 2048) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of this Security.

“Comparable Treasury Price” means (1) the average of five Reference Treasury Dealer Quotations for such Redemption Date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Independent Investment Banker obtains fewer than five such Reference Treasury Dealer Quotations, the average of all such quotations.

“Independent Investment Banker” means one of Mizuho Securities USA LLC, PNC Capital Markets LLC, Regions Securities LLC, TD Securities (USA) LLC or U.S. Bancorp Investments, Inc., as specified by the Company, or if these firms are unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing selected by the Company.

“Reference Treasury Dealer” means each of (1) Mizuho Securities USA LLC, TD Securities (USA) LLC and a primary U.S. government securities dealer in the United States of America (a “Primary Treasury Dealer”) designated by each of PNC Capital Markets LLC, Regions Securities LLC and U.S. Bancorp Investments, Inc. and their respective successors; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury Dealer and (2) any other Primary Treasury Dealer selected by the Company after consultation with the Independent Investment Banker.

“Reference Treasury Dealer Quotations” means with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at 5:00 p.m., New York City time, on the third Business Day preceding such Redemption Date.

The Trustee, at the written direction of the Company, will send a notice of redemption to each Holder of Securities to be redeemed by first-class mail (or in accordance with the procedures of The Depository Trust Company with respect to Securities registered in the name of Cede & Co.) at least 15 and not more than 60 days prior to the date fixed for redemption. Unless the Company defaults on payment of the redemption price, interest will cease to accrue on the Securities or portions thereof called for redemption on the Redemption Date. If fewer than all of the Securities of this series are to be redeemed, not more than 60 days prior to the Redemption Date, the particular Securities of this series or portions thereof for redemption will be selected from the outstanding Securities of this series not previously called by such method as the Trustee deems fair and appropriate. The Trustee may select for redemption Securities of this series and portions of Securities of this series in amounts of $2,000 or whole multiples of $1,000. In the case of a partial redemption of Securities registered in the name of Cede & Co, the Securities to be redeemed will be determined in accordance with the procedures of The Depository Trust Company.

The Indenture permits, with certain exceptions as therein provided, the Trustee to enter into one or more supplemental indentures for the purpose of adding any provisions to, or changing in any

manner or eliminating any of the provisions of, the Indenture with the consent of the Holders of not less than a majority in aggregate principal amount of the Securities of all series then Outstanding under the Indenture, considered as one class; provided, however, that if there shall be Securities of more than one series Outstanding under the Indenture and if a proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but less than all, of such series, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series so directly affected, considered as one class, shall be required; and provided, further, that if the Securities of any series shall have been issued in more than one Tranche and if the proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but less than all, of such Tranches, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all Tranches so directly affected, considered as one class, shall be required; and provided, further, that the Indenture permits the Trustee to enter into one or more supplemental indentures for limited purposes without the consent of any Holders of Securities. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Securities then Outstanding, on behalf of the Holders of all Securities, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

As provided in the Indenture and subject to certain limitations therein set forth, this Security or any portion of the principal amount hereof will be deemed to have been paid for all purposes of the Indenture and to be no longer Outstanding thereunder, and, at the election of the Company, the Company’s entire indebtedness in respect thereof will be satisfied and discharged, if there has been irrevocably deposited with the Trustee or any Paying Agent (other than the Company), in trust, money in an amount which will be sufficient and/or Eligible Obligations, the principal of and interest on which when due, without regard to any reinvestment thereof, will provide moneys which, together with moneys so deposited, will be sufficient to pay when due the principal of and interest on this Security when due.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registrable in the Security Register, upon surrender of this Security for registration of transfer at the Corporate Trust Office of The Bank of New York Mellon Trust Company, National Association in New York, New York, or such other office or agency as may be designated by the Company from time to time, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series of authorized denominations and of like tenor and aggregate principal amount, will be issued to the designated transferee or transferees.

The Securities of this series are issuable only as registered Securities, without coupons, and in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are

exchangeable for a like aggregate principal amount of Securities of the same series and Tranche, of any authorized denominations, as requested by the Holder surrendering the same, and of like tenor upon surrender of the Security or Securities to be exchanged at the office of The Bank of New York Mellon Trust Company, National Association in New York, New York, or such other office or agency as may be designated by the Company from time to time.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the absolute owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

The Securities are not entitled to the benefit of any sinking fund.

As used herein, “Business Day” shall mean any day, other than Saturday or Sunday, on which commercial banks and foreign exchange markets are open for business, including dealings in deposits in U.S. dollars, in New York, New York. All other terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

As provided in the Indenture, no recourse shall be had for the payment of the principal of or premium, if any, or interest on any Securities, or any part thereof, or for any claim based thereon or otherwise in respect thereof, or of the indebtedness represented thereby, or upon any obligation, covenant or agreement under the Indenture, against, and no personal liability whatsoever shall attach to, or be incurred by, any incorporator, member, manager, stockholder, officer, director or employee, as such, past, present or future of the Company or of any predecessor or successor corporation (either directly or through the Company or a predecessor or successor corporation), whether by virtue of any constitutional provision, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise; it being expressly agreed and understood that the Indenture and all the Securities are solely corporate obligations and that any such personal liability is hereby expressly waived and released as a condition of, and as part of the consideration for, the execution of the Indenture and the issuance of the Securities.

Unless the certificate of authentication hereon has been executed by the Trustee or an Authenticating Agent by manual signature, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

[The remainder of this page is intentionally left blank.]

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

		CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
Attest:		By:
	Vincent A. Mercaldi		Kristie L. Colvin
	Secretary		Senior Vice President and Chief Accounting Officer
(SEAL)

CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

Date of Authentication: ______________, 2019

THE BANK OF NEW YORK MELLON TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee

By:

SCHEDULE A

         The initial aggregate principal amount of Securities evidenced by the Certificate to which this Schedule is attached is $500,000,000. The notations on the following table evidence decreases and increases in the aggregate principal amount of Securities evidenced by such Certificate.

			Aggregate Principal
			Amount of Securities
	Decrease in Aggregate	Increase in Aggregate	Remaining After	Notation by
Date of	Principal Amount of	Principal Amount of	Such Decrease or	Security
Adjustment	Securities	Securities	Increase	Registrar

THIS SECURITY IS IN GLOBAL FORM AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY.

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to CenterPoint Energy Houston Electric, LLC or its agent for registration of transfer, exchange, or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein.

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC4.25% General Mortgage Bonds, Series AC, due 2049

Original Interest Accrual Date: January 15, 2019 Stated Maturity: February 1, 2049 Interest Rate: 4.25% Interest Payment Dates: February 1 and August 1 Regular Record Dates: January 15 and July 15 immediately preceding the respective Interest Payment Date Redeemable: Yes [X] No [ ] Redemption Date: At any time. Redemption Price: on any date prior to August 1, 2048 at a price equal to the greater of (i) 100% of the principal amount of this Security or the portion hereof to be redeemed or (ii) the sum of the present values of the remaining scheduled payments of principal and interest on this Security or the portion thereof to be redeemed that would be due if this Security matured on August 1, 2048 but for the redemption (not including any portion of such payments of interest accrued to the Redemption Date) discounted to the Redemption Date on a semiannual basis at the applicable Treasury Rate plus 20 basis points; plus, in each case, accrued and unpaid interest to the Redemption Date on the principal amount being redeemed; or on or after August 1, 2048, at a price equal to 100% of the principal amount of this Security or the portion thereof to be redeemed plus accrued and unpaid interest to the Redemption Date on the principal amount being redeemed.

This Security is not an Original Issue Discount Security
within the meaning of the within-mentioned Indenture.
_____________________________

Principal Amount    Registered No. T-2

$200,000,000*    CUSIP  15189X AT5

CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC, a limited liability company duly organized and existing under the laws of the State of Texas (herein called the “Company,” which term includes any successor under the Indenture referred to below), for value received, hereby promises to pay to

***CEDE & Co.***

__________________

*Reference is made to Schedule A attached hereto with respect to decreases and increases in the aggregate principal amount of Securities evidenced hereby.

, or its registered assigns, the principal sum of TWO HUNDRED MILLION DOLLARS, on the Stated Maturity specified above, and to pay interest thereon from the Original Interest Accrual Date specified above or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on the Interest Payment Dates specified above in each year, commencing on August 1, 2019, and at Maturity, at the Interest Rate per annum specified above, until the principal hereof is paid or duly provided for. The interest so payable, and paid or duly provided for, on any Interest Payment Date shall, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date specified above (whether or not a Business Day) next preceding such Interest Payment Date. Notwithstanding the foregoing, interest payable at Maturity shall be paid to the Person to whom principal shall be paid. Except as otherwise provided in said Indenture, any such interest not so paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice of which shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Payment of the principal of and premium, if any, on this Security and interest hereon at Maturity shall be made upon presentation of this Security at the office of the Corporate Trust Administration of The Bank of New York Mellon Trust Company, National Association, located in New York, New York or at such other office or agency as may be designated for such purpose by the Company from time to time. Payment of interest on this Security (other than interest at Maturity) shall be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register, except that if such Person shall be a securities depositary, such payment may be made by such other means in lieu of check, as shall be agreed upon by the Company, the Trustee and such Person. Payment of the principal of and premium, if any, and interest on this Security, as aforesaid, shall be made in such coin or currency of the United States of America as at the time of payment shall be legal tender for the payment of public and private debts.

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and issuable in one or more series under and equally secured by a General Mortgage Indenture, dated as of October 10, 2002, as supplemented and amended (such Indenture as originally executed and delivered and as supplemented or amended from time to time thereafter, together with any constituent instruments establishing the terms of particular Securities, being herein called the “Indenture”), between the Company and The Bank of New York Mellon Trust Company, National Association (successor in trust to JPMorgan Chase Bank), trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a description of the property mortgaged, pledged and held in trust, the nature and extent of the security and the respective rights, limitations of rights, duties and immunities of the Company, the Trustee and the Holders of the Securities thereunder and of the terms and conditions upon which the Securities are, and are to be, authenticated and delivered and secured. The acceptance of this Security shall be deemed to

constitute the consent and agreement by the Holder hereof to all of the terms and provisions of the Indenture. This Security is one of the series designated above.

If any Interest Payment Date, any Redemption Date or the Stated Maturity shall not be a Business Day (as hereinafter defined), payment of the amounts due on this Security on such date may be made on the next succeeding Business Day; and, if such payment is made or duly provided for on such Business Day, no interest shall accrue on such amounts for the period from and after such Interest Payment Date, Redemption Date or Stated Maturity, as the case may be, to such Business Day. Interest will be computed on the basis of a 360-day year of twelve 30-day months.

This Security is subject to redemption, at the option of the Company, at any time or from time to time, in whole or in part, on any date prior to August 1, 2048 at a price equal to the greater of (i) 100% of the principal amount of this Security (or the portion hereof to be redeemed) or (ii) the sum of the present values of the remaining scheduled payments of principal and interest on this Security (or such portion to be redeemed) that would be due if this Security (or such portion to be redeemed) matured on August 1, 2048 but for the redemption (not including any portion of such payments of interest accrued to the Redemption Date) discounted to the Redemption Date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the applicable Treasury Rate plus 20 basis points; plus, in each case, accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date. On or after August 1, 2048, the Company may redeem this Security, at any time or from time to time, in whole or in part, by paying 100% of the principal amount of this Security (or such portion to be redeemed) plus accrued and unpaid interest on the principal amount being redeemed to, but excluding, the Redemption Date. The Trustee shall have no responsibility for the calculation of such amount.

“Treasury Rate” means, with respect to any Redemption Date the yield calculated on the third business day preceding the Redemption Date, as follows: for the latest day that appears in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily) - H.15” (or any successor publication) (“H.15”) under the caption “Treasury Constant Maturities - Nominal”, the independent investment banker shall select two yields – one for the maturity immediately before and one for the maturity immediately after the remaining maturity of the notes (assuming the notes matured on August 1, 2048) – and shall interpolate on a straight-line basis using such yields; if there is no such maturity either before or after, the independent investment banker shall select the maturity closest to August 1, 2048 that appears on the release; or if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated by the Independent Investment Banker using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such Redemption Date. The Treasury Rate will be calculated by the Independent Investment Banker on the third Business Day preceding the Redemption Date.

“Comparable Treasury Issue” means the U.S. Treasury security selected by an Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term (“remaining life”) of this Security to be redeemed (assuming for this purpose that

this Security matured on August 1, 2048) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of this Security.

“Comparable Treasury Price” means (1) the average of five Reference Treasury Dealer Quotations for such Redemption Date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Independent Investment Banker obtains fewer than five such Reference Treasury Dealer Quotations, the average of all such quotations.

“Independent Investment Banker” means one of Mizuho Securities USA LLC, PNC Capital Markets LLC, Regions Securities LLC, TD Securities (USA) LLC or U.S. Bancorp Investments, Inc., as specified by the Company, or if these firms are unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing selected by the Company.

“Reference Treasury Dealer” means each of (1) Mizuho Securities USA LLC, TD Securities (USA) LLC and a primary U.S. government securities dealer in the United States of America (a “Primary Treasury Dealer”) designated by each of PNC Capital Markets LLC, Regions Securities LLC and U.S. Bancorp Investments, Inc. and their respective successors; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury Dealer and (2) any other Primary Treasury Dealer selected by the Company after consultation with the Independent Investment Banker.

“Reference Treasury Dealer Quotations” means with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at 5:00 p.m., New York City time, on the third Business Day preceding such Redemption Date.

The Trustee, at the written direction of the Company, will send a notice of redemption to each Holder of Securities to be redeemed by first-class mail (or in accordance with the procedures of The Depository Trust Company with respect to Securities registered in the name of Cede & Co.) at least 15 and not more than 60 days prior to the date fixed for redemption. Unless the Company defaults on payment of the redemption price, interest will cease to accrue on the Securities or portions thereof called for redemption on the Redemption Date. If fewer than all of the Securities of this series are to be redeemed, not more than 60 days prior to the Redemption Date, the particular Securities of this series or portions thereof for redemption will be selected from the outstanding Securities of this series not previously called by such method as the Trustee deems fair and appropriate. The Trustee may select for redemption Securities of this series and portions of Securities of this series in amounts of $2,000 or whole multiples of $1,000. In the case of a partial redemption of Securities registered in the name of Cede & Co, the Securities to be redeemed will be determined in accordance with the procedures of The Depository Trust Company.

The Indenture permits, with certain exceptions as therein provided, the Trustee to enter into one or more supplemental indentures for the purpose of adding any provisions to, or changing in any

manner or eliminating any of the provisions of, the Indenture with the consent of the Holders of not less than a majority in aggregate principal amount of the Securities of all series then Outstanding under the Indenture, considered as one class; provided, however, that if there shall be Securities of more than one series Outstanding under the Indenture and if a proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but less than all, of such series, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series so directly affected, considered as one class, shall be required; and provided, further, that if the Securities of any series shall have been issued in more than one Tranche and if the proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but less than all, of such Tranches, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all Tranches so directly affected, considered as one class, shall be required; and provided, further, that the Indenture permits the Trustee to enter into one or more supplemental indentures for limited purposes without the consent of any Holders of Securities. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Securities then Outstanding, on behalf of the Holders of all Securities, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

As provided in the Indenture and subject to certain limitations therein set forth, this Security or any portion of the principal amount hereof will be deemed to have been paid for all purposes of the Indenture and to be no longer Outstanding thereunder, and, at the election of the Company, the Company’s entire indebtedness in respect thereof will be satisfied and discharged, if there has been irrevocably deposited with the Trustee or any Paying Agent (other than the Company), in trust, money in an amount which will be sufficient and/or Eligible Obligations, the principal of and interest on which when due, without regard to any reinvestment thereof, will provide moneys which, together with moneys so deposited, will be sufficient to pay when due the principal of and interest on this Security when due.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registrable in the Security Register, upon surrender of this Security for registration of transfer at the Corporate Trust Office of The Bank of New York Mellon Trust Company, National Association in New York, New York, or such other office or agency as may be designated by the Company from time to time, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series of authorized denominations and of like tenor and aggregate principal amount, will be issued to the designated transferee or transferees.

The Securities of this series are issuable only as registered Securities, without coupons, and in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are

exchangeable for a like aggregate principal amount of Securities of the same series and Tranche, of any authorized denominations, as requested by the Holder surrendering the same, and of like tenor upon surrender of the Security or Securities to be exchanged at the office of The Bank of New York Mellon Trust Company, National Association in New York, New York, or such other office or agency as may be designated by the Company from time to time.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the absolute owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

The Securities are not entitled to the benefit of any sinking fund.

As used herein, “Business Day” shall mean any day, other than Saturday or Sunday, on which commercial banks and foreign exchange markets are open for business, including dealings in deposits in U.S. dollars, in New York, New York. All other terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

As provided in the Indenture, no recourse shall be had for the payment of the principal of or premium, if any, or interest on any Securities, or any part thereof, or for any claim based thereon or otherwise in respect thereof, or of the indebtedness represented thereby, or upon any obligation, covenant or agreement under the Indenture, against, and no personal liability whatsoever shall attach to, or be incurred by, any incorporator, member, manager, stockholder, officer, director or employee, as such, past, present or future of the Company or of any predecessor or successor corporation (either directly or through the Company or a predecessor or successor corporation), whether by virtue of any constitutional provision, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise; it being expressly agreed and understood that the Indenture and all the Securities are solely corporate obligations and that any such personal liability is hereby expressly waived and released as a condition of, and as part of the consideration for, the execution of the Indenture and the issuance of the Securities.

Unless the certificate of authentication hereon has been executed by the Trustee or an Authenticating Agent by manual signature, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

[The remainder of this page is intentionally left blank.]

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

		CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
Attest:		By:
	Vincent A. Mercaldi		Kristie L. Colvin
	Secretary		Senior Vice President and Chief Accounting Officer
(SEAL)

CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

Date of Authentication: ______________, 2019

THE BANK OF NEW YORK MELLON TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee

By:

SCHEDULE A

         The initial aggregate principal amount of Securities evidenced by the Certificate to which this Schedule is attached is $200,000,000. The notations on the following table evidence decreases and increases in the aggregate principal amount of Securities evidenced by such Certificate.

			Aggregate Principal
			Amount of Securities
	Decrease in Aggregate	Increase in Aggregate	Remaining After	Notation by
Date of	Principal Amount of	Principal Amount of	Such Decrease or	Security
Adjustment	Securities	Securities	Increase	Registrar

EX-10.(H)

Exhibit 10(h)

CenterPoint Energy, Inc.

Summary of Certain Compensation Arrangements

of the Executive Chairman of the Board

The following is a summary of certain compensation arrangements payable to Milton Carroll, the Executive Chairman of the Board of Directors (the “Board”) of CenterPoint Energy, Inc. (the “Company”):

• Mr. Carroll’s annual base salary is increased from $710,000 to $760,000 effective as of April 1, 2019 and continuing thereafter until the termination of Mr. Carroll’s service as Executive Chairman of the Board or as otherwise modified by the Board; and

• Mr. Carroll’s long-term incentive compensation target is increased from a target equal to 300% of base salary to a target equal to 325% of base salary.

Mr. Carroll was not granted any additional awards of restricted stock units in 2019, other than in connection with his long-term incentive award noted above.

EX-10.(M)

Exhibit 10(m)

CENTERPOINT ENERGY, INC. SHORT TERM INCENTIVE PLAN

(As Amended and Restated Effective January 1, 2019)

RECITALS

Effective for Plan Years beginning on or after January 1, 2019, the Board of Directors of CenterPoint Energy, Inc. (the “Company”) has adopted the CenterPoint Energy, Inc. Short Term Incentive Plan (As Amended and Restated Effective January 1, 2019) (the "Plan") on the terms and conditions hereinafter stated. The Plan, as set forth herein, amends and restates, in its entirety the CenterPoint Energy, Inc. Short Term Incentive Plan (As Amended and Restated Effective January 1, 2003) (the “Prior Plan”).

There shall be no termination and no gap or lapse in time or effect between the Prior Plan and this Plan. The amendment, restatement and continuation of the Prior Plan in the form of this Plan shall not operate to exclude, diminish, limit or restrict the payments or continuation of payments of benefits to Participants under the terms of the Prior Plan as in effect prior to its amendment, restatement and continuation in the form of this Plan. Except to the extent otherwise required to reflect the fact that benefits accrued under the Prior Plan are continued under this Plan, the provisions of this Plan shall apply only to an employee eligible to participate under this Plan on or after January 1, 2019.

NOW, THEREFORE, effective for Plan Years beginning on or after January 1, 2019, the Company hereby amends and restates in its entirety and continues the Prior Plan as follows:

1.Purpose:The purpose of the Plan is to encourage a high level of corporate performance through the establishment of predetermined corporate, Subsidiary or business unit and/or individual goals, the attainment of which will require a high degree of competence and diligence on the part of those Employees (including officers) of the Company or of its participating Subsidiaries selected to participate in the Plan, and which will be beneficial to the owners and customers of the Company.

2.Definitions:Unless the context otherwise clearly requires, the following definitions are applicable to the Plan:

Award:An incentive compensation award generally payable in cash granted to a Participant with respect to a particular Plan Year pursuant to any applicable terms, conditions and limitations as the Committee may establish in order to fulfill the objectives of the Plan.

Board of Directorsor Board:The Board of Directors of the Company.

Code:The Internal Revenue Code of 1986, as amended from time to time.

Committee:The Compensation Committee of the Board of Directors.

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Company:CenterPoint Energy, Inc. or any successor thereto.

Compensation:Compensation or eligible earnings during the year means the actual base salary paid to a salaried exempt Participant during the Plan Year, including vacation, holiday and sick time. Eligible earnings exclude all special payments, bonuses, allowances., reimbursements, and payments in lieu of overtime. Compensation or eligible earnings during the year means the actual gross wages paid to an hourly or salaried non-exempt Participant during the Plan Year, including vacation, holiday and sick time. Eligible earnings exclude all special payments, bonuses, allowances, reimbursements, but include overtime pay in a manner consistent with the requirements of applicable labor law. Notwithstanding the foregoing, any Participant covered by the terms of a collective bargaining agreement shall have his Compensation calculated in the manner consistent with the collective bargaining agreement, if applicable.

Employee:An employee of the Company or any of its Subsidiaries who is a regular full or part-time employee and who regularly works at least 20 hours per week.

Employer:The Company and each Subsidiary which is designated by the Committee as an Employer under this Plan.

Participant:An Employee who is selected to participate in the Plan.

Payment Date: The date an Award shall be paid as provided in Section 8(b) of the Plan.

Performance Goals: The performance objectives of the Company, its Subsidiaries or its business units and/or individual Participants established for the purpose of determining the level of Awards, if any, earned during a Plan Year.

Plan:This CenterPoint Energy, Inc. Short Term Incentive Plan, as amended from time to time.

Plan Year:The calendar year.

Retirement Date: A Participant’s date of termination of employment with his Employer (and all other Employers and affiliates of the Company) that is on or after the date on which he has (i) attained age 55 and (ii) completed five years of “Vesting Service” (as defined in the Retirement Plan).

Retirement Plan:CenterPoint Energy Retirement Plan, as amended and restated effective January 1, 2016, and as thereafter amended.

Subsidiary:A subsidiary corporation with respect to the Company as defined in Section 424(f) of the Code.

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A pronoun or adjective in the masculine gender includes the feminine gender, and the singular includes the plural, unless the context clearly indicates otherwise.

3.Participation:The Committee (or its appropriately designated delegate) shall select the Employees who will be Participants for each Plan Year. No Employee shall at any time have the right (a) to be selected as a Participant in the Plan for any Plan Year, (b) if so selected, to be entitled to an Award, or (c) if selected as a Participant in one Plan Year, to be selected as a Participant in any subsequent Plan Year. The terms and conditions under which a Participant may participate in the Plan shall be determined by the Committee (or its appropriately designated delegate) in its sole discretion.

4.Eligibility:Except as provided below, only Participants who (x) are Employees on the last business day prior to October 1 of the Plan Year and (y) are continuously Employees from such date through the Payment Date are eligible for the payment of an Award under the Plan. Employees covered by a collective bargaining agreement providing for participation in this Plan are eligible for payments under this Plan only to the extent of the specific terms contained in the applicable collective bargaining agreement. Employees covered by a collective bargaining agreement that does not specifically provide for their participation in this Plan are not eligible for any payments under this Plan under any circumstances notwithstanding the following.

(a)Retirement, Death or Disability During the Plan Year:

(i)Retirement: If a Participant (A) was an Employee on January 2 of the Plan Year and (B) terminates during the Plan Year on his Retirement Date, then the Participant shall nonetheless receive a payment of the Award the Participant would have received had the Performance Goals with respect to the Participant's Award been met at the target level, without regard to the Participant’s individual performance, based on his Compensation earned prior to the Participant's Retirement Date. Payments under this clause (i) shall be made as soon as practicable following the Participant’s Retirement Date, but no later than 30 days after the Retirement Date.

(ii)Death or Disability: If, during the Plan Year, a Participant dies or terminates employment under circumstances establishing eligibility for disability benefits under the Company's long-term disability plan, then the Participant shall nonetheless receive payment of the Award the Participant would have received had the Performance Goals with respect to the Participant's Award been met at the target level, without regard to the Participant’s individual performance, based on his Compensation earned prior to the Participant's death or disability. Payments under this clause (ii) shall be made as soon as practicable following the date of the Participant's death or disability, but no later than 30 days after the date of the Participant's death or disability.

3

(b)Retirement, Death or Disability After Last Day of the Plan Year:

(i)Retirement: If a Participant would be eligible for the payment of an Award under the prior provisions of this Section 4 except that, after the last day of the Plan Year and before the Payment Date, the Participant terminates employment on his Retirement Date, then the Participant shall nonetheless receive a payment of the Award (if any) based on the Committee’s determination of actual achievement of the Performance Goals with respect to the Participant’s Award, the Participant’s individual performance during the Plan Year, and his Compensation earned during the Plan Year. Payments under this clause (i) shall be made as provided in Section 8(b).

(ii)Death or Disability: If a Participant would be eligible for the payment of an Award under the prior provisions of this Section 4 except that, after the last day of the Plan Year and before the Payment Date, the Participant dies or terminates employment under circumstances establishing eligibility for disability benefits under the Company's long-term disability plan, then the Participant shall nonetheless receive payment of the Award (if any) based on the Committee’s determination of actual achievement of the Performance Goals with respect to the Participant’s Award, without regard to the Participant’s individual performance, and his Compensation earned during the Plan Year. Payments under this clause (ii) shall be made as provided in Section 8(b).

5.Plan Administration:The Plan shall be administered by the Committee. All decisions of the Committee shall be binding and conclusive on the Participants. The Committee, on behalf of the Participants, shall enforce this Plan in accordance with its terms and shall have all powers necessary for the accomplishment of that purpose, including, but not by way of limitation, the following powers:

(a)To select the Participants;

(b)To interpret, construe, approve and adjust all terms, provisions, conditions and limitations of this Plan;

(c)To decide any questions arising as to the interpretation or application of any provision of the Plan;

(d)To prescribe forms and procedures to be followed by Employees for participation in the Plan, or for other occurrences in the administration of the Plan;

(e)To establish the terms and conditions of any Agreement under which an Award may be earned and paid; and

4

(f)In addition to all other powers granted herein, the Committee shall make and enforce such rules and regulations for the administration of the Plan as are not inconsistent with the terms set forth herein.

No member of the Committee or officer of the Company to whom the Committee has delegated authority in accordance with the provisions of Section 5 of this Plan shall be liable for anything done or omitted to be done by him, by any member of the Committee or by any officer of the Company in connection with the performance of any duties under this Plan, except for his own willful misconduct or as expressly provided by statute.

6.Delegation of Authority:The Committee may delegate to the Chief Executive Officer and to other senior officers of the Company its duties under this Plan (including, but not limited to, its authority to select Participants) pursuant to such conditions or limitations as the Committee may establish.

7.Awards: The Committee shall determine the terms and conditions of Awards to be made under this Plan and shall designate from time to time the individuals who are to be the recipients of Awards. Awards may also be made in combination or in tandem with, in replacement of, or as alternative to, grants or rights under this Plan or any other employee plan of the Company or any of its Subsidiaries, including the plan of any acquired entity. An Award may provide for the grant or issuance of additional, replacement or alternative Awards upon the occurrence of specified events. All or part of an Award may be subject to conditions established by the Committee, which may include, but are not limited to, continuous service with the Company and its Subsidiaries and achievement of Performance Goals, such as specific individual and/or business objectives, increases in specified indices, attainment of specified growth rates and other comparable measurements of performance. Unless specified otherwise by the Committee, the amount payable pursuant to an Award shall be based on a percentage of the Participant's Compensation.

8.Payment of Awards: The Committee has sole and absolute authority and discretion to determine whether an Award shall be paid under this Plan and if so such payment will be made in accordance with the following:

(a)Form of Payment: Generally, payment of Awards shall be made in cash and may be subject to such restrictions as the Committee shall determine.

(b)Date of Payment: Except as provided in Section 4(a), payment of any Awards for a Plan Year (“Award Plan Year”) shall be made as soon as practicable after the close of the Award Plan Year (as determined by the Committee), but in no event later than March 15th of the Plan Year immediately following the close of the Award Plan Year (“Payment Date”).

9.Assignability: Unless otherwise determined by the Committee and provided in the Agreement, no Award or any other benefit under this Plan shall be assignable or otherwise

5

transferable, except by will or the laws of descent and distribution. Any attempted assignment of an Award or any other benefit under this Plan in violation of this Section 9 shall be null and void.

10.Tax Withholding: The Company shall have the right to withhold applicable taxes from any Award payment and to take such other action as may be necessary in the opinion of the Company to satisfy all obligations for withholding of such taxes.

11.Finality of Determinations: Any determination by the Committee in carrying out or administering this Plan shall be final and binding for all purposes and upon all interested persons and their heirs, successors, and personal representatives.

12.Employee Rights Under the Plan:No Employee or other person shall have any claim or right to be granted an Award under this Plan. Neither the Plan nor any action taken thereunder shall be construed as giving an Employee any right to be retained in the employ of the Company or an Employer. No Participant shall have any lien on any assets of the Company or an Employer by reason of any Award made under this Plan.

13.Amendment, Modification, Suspension or Termination:The Board may amend, modify, suspend or terminate this Plan for the purpose of meeting or addressing any changes in legal requirements or for any other purpose permitted by law, except that (i) no amendment or alteration that would adversely affect the rights of any Participant under any Award previously granted to such Participant shall be made without the consent of such Participant and (ii) no amendment or alteration shall be effective prior to its approval by the stockholders of the Company; however clause (ii) shall only apply if, and to the extent, such approval is required by applicable legal requirements.

14.Governing Law: This Plan and all determinations made, and actions taken pursuant hereto, shall be governed by and construed in accordance with the laws of the State of Texas.

15.Exclusion from Section 409A: This Plan is intended to provide “short-term deferrals” as described in Treasury Regulation § l.409A-l(b)(4) under Section 409A of the Code (or successor guidance thereto), and not to be a “nonqualified deferred compensation plan” for purposes of Section 409A of the Code. The Plan shall be administrated and interpreted consistent with that intent.

[Remainder of page intentionally blank. Signature page follows.]

6

IN WITNESS WHEREOF, CenterPoint Energy, Inc. has executed these presents as evidenced by the signature of its duly authorized officer, which may be sufficiently evidenced by any such executed copy hereof, this 17th day of December, 2018, but effective as set forth above.

	CENTERPOINT ENERGY, INC.
	By:	/s/ Scott M. Prochazka
		Scott M. Prochazka
		President and Chief Executive Officer
ATTEST:
/s/ Vincent A. Mercaldi
Vincent A. Mercaldi
Assistant Corporate Secretary

7

EX-10.(R)

Exhibit 10(r)

CenterPoint Energy, Inc.

Summary of Non-Employee Director Compensation

The following is a summary of compensation paid to the non-employee directors of CenterPoint Energy, Inc. (the “Company”) effective April 26, 2018. For additional information regarding the compensation of the non-employee directors, please read the definitive proxy statement relating to the Company’s 2019 annual meeting of shareholders to be filed pursuant to Regulation 14A.

• Annual retainer fee of $100,000 for Board membership, paid quarterly in arrears;

• Supplemental annual retainer of $20,000 for serving as a chairman of the Audit Committee or Compensation Committee; and

• Supplemental annual retainer of $15,000 for serving as a chairman of the Finance Committee or Governance Committee.

Stock Grants. Each non-employee director serving as of May 1, 2018 was granted an annual stock award under the CenterPoint Energy Inc. Stock Plan for Outside Directors in 2018. The cash value of these awards, as of the grant date, is set annually by the Board of Directors of the Company. The number of shares awarded is then determined by dividing the cash value by the fair market value of the common stock on the grant date. In 2018, the Board determined a cash value for the stock award, as of the grant date, of $130,000, resulting in a stock award to each non-employee director of 5,110 shares of common stock. The annual stock award granted in 2018 and any future stock awards under the Stock Plan for Outside Directors are immediately fully vested upon grant.

Deferred Compensation Plan. Directors may elect each year to defer all or part of their annual retainer fees, including any committee chairman fees and meeting fees. Directors participating in these plans may elect to receive distributions of their deferred compensation and interest in three ways: (i) an early distribution of either 50% or 100% of their deferrals for the year in any year that is at least four years from the year of deferral or, if earlier, the year in which they attain their normal retirement date under the plan (the first day of the month coincident with or next following attainment of age 70); (ii) a lump sum distribution payable in the year after they reach their normal retirement date or leave the Board of Directors, whichever is later; or (iii) 15 annual installments beginning on the first of the month coincident with or next following their normal retirement date or upon leaving the Board of Directors, whichever is later.

EX-10.(S)

Exhibit 10(s)

CenterPoint Energy, Inc.

Summary of Senior Executive Officer Compensation

The following is a summary of compensation paid to the Chief Executive Officer, Chief Financial Officer, Executive Vice President and Executive Vice President and General Counsel identified below (to whom we collectively refer as our “senior executive officers”) of CenterPoint Energy, Inc. (the “Company”). For additional information regarding the compensation of the senior executive officers, please read the definitive proxy statement relating to the Company’s 2019 annual meeting of shareholders to be filed pursuant to Regulation 14A.

Base Salary. The following table sets forth the annual base salary of the Company’s senior executive officers effective April 1, 2019:

Name and Position	Base Salary
Scott M. Prochazka President and Chief Executive Officer	$	1,323,000
William D. Rogers* Executive Vice President and Chief Financial Officer	$	595,000
Tracy B. Bridge Executive Vice President and President Electric Division	$	560,000
Dana C. O’Brien Executive Vice President and General Counsel	$	545,000

Short Term Incentive Plan. Annual bonuses are paid to the Company’s senior executive officers pursuant to the Company’s short term incentive plan, which provides for cash bonuses based on the achievement of certain performance objectives approved in accordance with the terms of the plan at the commencement of the year. Information regarding awards to the Company’s senior executive officers under the short term incentive plan is provided in definitive proxy statements relating to the Company’s annual meeting of shareholders. In February 2019, the Compensation Committee of the Company approved the following:

• No changes were made to Mr. Prochazka’s short-term incentive target of 115%;

• No changes were made to Mr. Rogers’s short-term incentive target of 75%*;

• No changes were made to Mr. Bridge’s short-term incentive target of 75%; and

• No changes were made to Ms. O’Brien’s short-term incentive target of 65%.

Long Term Incentive Plan. Under the Company’s long term incentive plan, the Company’s senior executive officers may receive grants of (i) stock option awards, (ii) stock appreciation rights, (iii) stock awards, (iv) restricted stock unit awards, (v) cash awards and (vi) performance awards. The current forms of the applicable award agreements pursuant to the Company’s long term incentive plan are included as exhibits hereto. In February 2019, the Compensation Committee of the Company approved the following:

• Mr. Prochazka’s long-term incentive target was increased from 435% to 450%;

• No changes were made to Mr. Rogers’s long-term incentive target of 200%*;

• No changes were made to Mr. Bridge’s long-term incentive target of 170%; and

• Ms. O’Brien’s long-term incentive target was increased from 160% to 170%.

* On November 27, 2018, Mr. Rogers informed the Company of his intent to retire in 2019.

EX-21

Exhibit 21

SIGNIFICANT SUBSIDIARIES OF CENTERPOINT ENERGY, INC.

The following subsidiaries are deemed “significant subsidiaries” pursuant to Item 601(b) (21) of Regulation S-K:

Utility Holding, LLC, a Delaware limited liability company and a direct wholly owned subsidiary of CenterPoint Energy, Inc.

CenterPoint Energy Resources Corp., a Delaware corporation and an indirect wholly owned subsidiary of CenterPoint Energy, Inc.

CenterPoint Energy Houston Electric, LLC, a Texas limited liability company and an indirect wholly owned subsidiary of CenterPoint Energy, Inc.

CenterPoint Energy Services, Inc., a Delaware corporation and an indirect wholly owned subsidiary of CenterPoint Energy, Inc.

CenterPoint Energy Midstream, Inc., a Delaware corporation and an indirect wholly owned subsidiary of CenterPoint Energy, Inc.

(1) Pursuant to Item 601(b) (21) of Regulation S-K, registrant has omitted the names of subsidiaries, which considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary” (as defined under Rule 1-02(w) of Regulation S-X) as of December 31, 2018.

EX-23.1.1

Exhibit 23.1.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-215833 (including Post-Effective Amendment No. 1 thereto), 333-209241, and 333-114543 on Form S-3; Registration Statement Nos. 333-203201, as amended, 333-179310, 333-173660, 333-149757, 333-101202, as amended, 333-115976, as amended, 333-159586, as amended, and 333-105773, as amended on Form S-8; Post-Effective Amendment No. 1 to Registration Statement Nos. 333-32413-99, 333-49333-99, 333-38188-99, 333-60260-99 and 333-98271-99 on Form S-8; and Post-Effective Amendment No. 5 to Registration Statement No. 333-11329-99 on Form S-8 of our reports dated February 28, 2019, relating to the consolidated financial statements of CenterPoint Energy, Inc. and subsidiaries (the “Company”), and the effectiveness of the Company's internal control over financial reporting, appearing in this Annual Report on Form 10-K of CenterPoint Energy, Inc. for the year ended December 31, 2018.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019

EX-23.1.2

Exhibit 23.1.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-215833-01 (including Post-Effective Amendment No. 1 thereto) on Form S-3 of our report dated February 28, 2019, relating to the consolidated financial statements of CenterPoint Energy Houston Electric, LLC and subsidiaries appearing in this Annual Report on Form 10-K of CenterPoint Energy Houston Electric, LLC for the year ended December 31, 2018.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019

EX-23.1.3

Exhibit 23.1.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-215833-02 (including Post-Effective Amendment No. 1 thereto) on Form S-3 of our reports dated February 28, 2019, relating to the consolidated financial statements of CenterPoint Energy Resources Corp. and subsidiaries, appearing in this Annual Report on Form 10-K of CenterPoint Energy Resources Corp. for the year ended December 31, 2018.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 28, 2019

EX-23.2

Exhibit 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-215833 (including Post-Effective Amendment No. 1 thereto), 333-209241, and 333-114543 on Form S-3; Registration Statement Nos. 333-203201, as amended, 333-179310, 333-173660, 333-149757, 333-101202, as amended, 333-115976, as amended, 333-159586, as amended, and 333-105773, as amended on Form S-8; Post-Effective Amendment No. 1 to Registration Statement Nos. 333-32413-99, 333-49333-99, 333-38188-99, 333-60260-99 and 333-98271-99 on Form S-8; and Post-Effective Amendment No. 5 to Registration Statement No. 333-11329-99 on Form S-8 of CenterPoint Energy, Inc. of our report dated February 19, 2019, relating to the consolidated financial statements of Enable Midstream Partners, LP and subsidiaries, appearing in this Annual Report on Form 10-K of CenterPoint Energy, Inc. for the year ended December 31, 2018.

/s/ DELOITTE & TOUCHE LLP

Oklahoma City, Oklahoma

February 28, 2019

EX-31.1.1

Exhibit 31.1.1

CERTIFICATIONS

I, Scott M. Prochazka, certify that:

1.           I have reviewed this annual report on Form 10-K of CenterPoint Energy, Inc.;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.           The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:       February 28, 2019

/s/ Scott M. Prochazka

Scott M. Prochazka

President and Chief Executive Officer

EX-31.1.2

Exhibit 31.1.2

CERTIFICATIONS

I, Scott M. Prochazka, certify that:

1. I have reviewed this annual report on Form 10-K of CenterPoint Energy Houston Electric, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 28, 2019

/s/ Scott M. Prochazka

Scott M. Prochazka

Chairman (Principal Executive Officer)

EX-31.1.3

Exhibit 31.1.3

CERTIFICATIONS

I, Scott M. Prochazka, certify that:

1.           I have reviewed this annual report on Form 10-K of CenterPoint Energy Resources Corp.;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.           The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.           The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 28, 2019

/s/ Scott M. Prochazka

Scott M. Prochazka

President and Chief Executive Officer

EX-31.2.1

Exhibit 31.2.1

CERTIFICATIONS

I, William D. Rogers, certify that:

1.           I have reviewed this annual report on Form 10-K of CenterPoint Energy, Inc.;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.           The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:       February 28, 2019

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

EX-31.2.2

Exhibit 31.2.2

CERTIFICATIONS

I, William D. Rogers, certify that:

1.I have reviewed this annual report on Form 10-K of CenterPoint Energy Houston Electric, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  February 28, 2019

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

EX-31.2.3

Exhibit 31.2.3

CERTIFICATIONS

I, William D. Rogers, certify that:

1.           I have reviewed this annual report on Form 10-K of CenterPoint Energy Resources Corp.;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.           The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.           The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 28, 2019

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

EX-32.1.1

Exhibit 32.1.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Scott M. Prochazka, Chief Executive Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.           The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Scott M. Prochazka

Scott M. Prochazka

President and Chief Executive Officer

February 28, 2019

EX-32.1.2

Exhibit 32.1.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy Houston Electric, LLC (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Scott M. Prochazka, Chairman (Principal Executive Officer), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Scott M. Prochazka

Scott M. Prochazka

Chairman (Principal Executive Officer)

February 28, 2019

EX-32.1.3

Exhibit 32.1.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy Resources Corp. (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Scott M. Prochazka, Chief Executive Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.           The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Scott M. Prochazka

Scott M. Prochazka

President and Chief Executive Officer

February 28, 2019

EX-32.2.1

Exhibit 32.2.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, William D. Rogers, Chief Financial Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.           The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

February 28, 2019

EX-32.2.2

Exhibit 32.2.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy Houston Electric, LLC (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, William D. Rogers, Chief Financial Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

February 28, 2019

EX-32.2.3

Exhibit 32.2.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CenterPoint Energy Resources Corp. (the “Company”) on Form 10-K for the year ended December 31, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, William D. Rogers, Chief Financial Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.           The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William D. Rogers

William D. Rogers

Executive Vice President and Chief Financial Officer

February 28, 2019

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 12, 2019	Jun. 30, 2018
Entity Information [Line Items]
Entity Registrant Name	CENTERPOINT ENERGY INC
Entity Central Index Key	0001130310
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		501,206,304
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 11,873,304,802
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Houston Electric [Member]
Entity Information [Line Items]
Entity Registrant Name	CENTERPOINT ENERGY HOUSTON ELECTRIC LLC
Entity Central Index Key	0000048732
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			0
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
CERC Corp [Member]
Entity Information [Line Items]
Entity Registrant Name	CENTERPOINT ENERGY RESOURCES CORP
Entity Central Index Key	0001042773
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 0
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

XML

STATEMENTS OF CONSOLIDATED INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Revenues:
Utility revenues		$ 6,163		$ 5,603		$ 5,440
Non-utility revenues		4,426		4,011		2,088
Total		10,589		9,614		7,528
Expenses:
Utility natural gas		1,410		1,109		983
Non-utility natural gas	[1]	4,364		3,785		1,983
Operation and maintenance		2,335		2,157		2,029
Depreciation and amortization		1,243		1,036		1,126
Taxes other than income taxes		406		391		384
Total		9,758		8,478		6,505
Operating Income		831		1,136		1,023
Other Income (Expense):
Gain (loss) on marketable securities		(22)		7		326
Gain (loss) on indexed debt securities		(232)		49		(413)
Interest and other finance charges		(361)		(313)		(338)
Interest on Securitization Bonds		(59)		(77)		(91)
Equity in earnings of unconsolidated affiliates, net		307		265		208
Other, net		50		(4)		(29)
Total		(317)		(73)		(337)
Income Before Income Taxes		514	[2]	1,063	[3]	686	[4]
Income tax expense (benefit)		146	[2]	(729)	[3]	254	[4]
Net Income		368		1,792		432
Preferred stock dividend requirement		35		0		0
Income Available to Common Shareholders	[5]	$ 333		$ 1,792		$ 432
Basic Earnings Per Common Share		$ 0.74		$ 4.16		$ 1.00
Diluted Earnings Per Common Share		$ 0.74		$ 4.13		$ 1.00
Weighted Average Common Shares Outstanding, Basic		448,829,000		430,964,000		430,606,000
Weighted Average Common Shares Outstanding, Diluted		452,465,000		434,308,000		433,603,000
Houston Electric [Member]
Revenues:
Total		$ 3,234		$ 2,998		$ 3,059
Expenses:
Operation and maintenance		1,452		1,402		1,338
Depreciation and amortization		917		724		838
Taxes other than income taxes		240		235		231
Total		2,609		2,361		2,407
Operating Income		625		637		652
Other Income (Expense):
Interest and other finance charges		(138)		(128)		(126)
Interest on Securitization Bonds		(59)		(77)		(91)
Other, net		(3)		(8)		(10)
Total		(200)		(213)		(227)
Income Before Income Taxes		425	[6]	424	[7]	425
Income tax expense (benefit)		89	[6]	(9)	[7]	149
Net Income		336		433		276
CERC Corp [Member]
Revenues:
Utility revenues		2,931		2,606		2,380
Non-utility revenues		4,412		3,997		2,074
Total		7,343		6,603		4,454
Expenses:
Utility natural gas		1,410		1,109		983
Non-utility natural gas		4,364		3,785		1,983
Operation and maintenance		898		816		754
Depreciation and amortization		293		279		249
Taxes other than income taxes		156		147		144
Total		7,121		6,136		4,113
Operating Income		222		467		341
Other Income (Expense):
Interest and other finance charges		(122)		(123)		(122)
Other, net		(8)		(25)		(20)
Total		(130)		(148)		(142)
Income Before Income Taxes		92		319		199
Income tax expense (benefit)		22		(265)		81
Income From Continuing Operations		70		584		118
Income from discontinued operations (net of tax expense of $46, $104, and $81, respectively)		138		161		127
Net Income		$ 208		$ 745		$ 245

[1] Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for the Registrants for the years ended December 31, 2018, 2017 and 2016, respectively.

[2] Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[3] Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[4] Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

[5] Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

[6] Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[7] Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

XML

STATEMENTS OF CONSOLIDATED INCOME (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CERC Corp [Member]
Income tax expense (benefit) associated with discontinued operations	$ 46	$ 104	$ 81

XML

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 368	$ 1,792	$ 432
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	(10)	6	(7)
Net deferred gain (loss) from cash flow hedges	(15)	(3)	1
Reclassification of deferred loss from cash flow hedges realized in net income (net of tax expense of $-0-, $-0-, and $1, respectively)	0	0	1
Other comprehensive income (loss)	(25)	3	(5)
Comprehensive income	343	1,795	427
Preferred stock dividend requirement	35	0	0
Comprehensive income	308	1,795	427
Houston Electric [Member]
Net income	336	433	276
Other comprehensive income (loss):
Net deferred gain (loss) from cash flow hedges	(14)	(1)	1
Other comprehensive income (loss)	(14)	(1)	1
Comprehensive income	322	432	277
CERC Corp [Member]
Net income	208	745	245
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	1	4	(6)
Net deferred gain (loss) from cash flow hedges	(1)	(1)	0
Other comprehensive income (loss)	0	3	(6)
Comprehensive income	$ 208	$ 748	$ 239

XML

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax benefit (expense) on adjustment related to pension and postretirement plans	$ 2	$ (6)	$ 4
Tax expense (benefit) on net deferred gain (loss) from cash flow hedges	(4)	(2)	0
Tax expense (benefit) on deferred loss from cash flow hedges realized in net income	0	0	1
Houston Electric [Member]
Tax expense (benefit) on net deferred gain (loss) from cash flow hedges	(4)	0	0
CERC Corp [Member]
Tax benefit (expense) on adjustment related to pension and postretirement plans	(1)	(4)	4
Tax expense (benefit) on net deferred gain (loss) from cash flow hedges	$ 0	$ (1)	$ 0

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Current Assets:
Cash and cash equivalents	[1]	$ 4,231		$ 260
Investment in marketable securities		540		960
Accounts receivable		1,190		1,000
Accrued unbilled revenues		378		427
Natural gas inventory		194		222
Materials and supplies		200		175
Non-trading derivative assets		100		110
Prepaid expense and other current assets		192		241
Total current assets		7,025		3,395
Property, Plant and Equipment, net		14,044		13,057
Other Assets:
Goodwill		867		867
Regulatory assets		1,967		2,347
Non-trading derivative assets		38		44
Investment in unconsolidated affiliates		2,482		2,472
Preferred units - unconsolidated affiliate		363		363
Other		223		191
Total other assets		5,940		6,284
Total Assets		27,009		22,736
Current Liabilities:
Short-term borrowings		0		39
Current portion of VIE Securitization Bonds long-term debt		458		434
Indexed debt, net		24		122
Current portion of other long-term debt		0		50
Indexed debt securities derivative		601		668
Accounts payable		1,240		963
Taxes accrued		204		181
Interest accrued		121		104
Dividends accrued		187		120
Non-trading derivative liabilities		126		20
Other		341		368
Total current liabilities		3,302		3,069
Other Liabilities:
Deferred income taxes, net		3,239		3,174
Non-trading derivative liabilities		5		4
Benefit obligations		796		785
Regulatory liabilities		2,525		2,464
Other		402		357
Total other liabilities		6,967		6,784
Long-term Debt:
VIE Securitization Bonds, net		977		1,434
Other long-term debt, net		7,705		6,761
Total long-term debt, net		8,682		8,195
Commitments and Contingencies (Note 16)
Shareholders’ Equity:
Cumulative preferred stock, $0.01 par value, 20,000,000 shares authorized		0		0
Common stock		5		4
Additional paid-in capital		6,072		4,209
Retained earnings		349		543
Accumulated other comprehensive income (loss)		(108)		(68)
Total shareholders’ equity		8,058		4,688
Total Liabilities and Shareholders’ Equity		27,009		22,736
Houston Electric [Member]
Current Assets:
Cash and cash equivalents	[2]	335		238
Accounts and notes receivable, net		283		284
Accounts and notes receivable—affiliated companies		20		7
Accrued unbilled revenues		110		120
Materials and supplies		135		119
Taxes receivable		5		0
Prepaid expense and other current assets		61		62
Total current assets		949		830
Property, Plant and Equipment, net		8,402		7,863
Other Assets:
Regulatory assets		1,124		1,570
Other		32		29
Total other assets		1,156		1,599
Total Assets		10,507		10,292
Current Liabilities:
Current portion of VIE Securitization Bonds long-term debt		458		434
Accounts payable		262		243
Accounts and notes payable—affiliated companies		78		104
Taxes accrued		115		116
Interest accrued		64		65
Non-trading derivative liabilities		24		0
Other		89		120
Total current liabilities		1,090		1,082
Other Liabilities:
Deferred income taxes, net		1,023		1,059
Benefit obligations		91		146
Regulatory liabilities		1,298		1,263
Other		65		54
Total other liabilities		2,477		2,522
Long-term Debt:
VIE Securitization Bonds, net		977		1,434
Other long-term debt, net		3,281		2,885
Total long-term debt, net		4,258		4,319
Commitments and Contingencies (Note 16)
Shareholders’ Equity:
Common stock		0		0
Additional paid-in capital		1,896		1,696
Retained earnings		800		673
Accumulated other comprehensive income (loss)		(14)		0
Total shareholders’ equity		2,682		2,369
Total Liabilities and Shareholders’ Equity		10,507		10,292
CERC Corp [Member]
Current Assets:
Cash and cash equivalents		14		12
Accounts receivable		894		713
Accounts and notes receivable—affiliated companies		120		6
Accrued unbilled revenues		268		307
Natural gas inventory		194		222
Materials and supplies		65		56
Non-trading derivative assets		100		110
Prepaid expense and other current assets		115		166
Total current assets		1,770		1,592
Property, Plant and Equipment, net		5,226		4,852
Other Assets:
Goodwill		867		867
Regulatory assets		181		181
Non-trading derivative assets		38		44
Investment in unconsolidated affiliates - discontinued operations		0		2,472
Other		132		104
Total other assets		1,218		3,668
Total Assets		8,214	[3]	10,112
Current Liabilities:
Short-term borrowings	[4],[5]	0		39
Current portion of long-term debt	[4],[5]	0		0
Accounts payable		856		669
Accounts and notes payable—affiliated companies		50		611
Taxes accrued		82		75
Interest accrued		38		32
Customer deposits		75		76
Non-trading derivative liabilities		102		20
Other		137		137
Total current liabilities		1,340		1,659
Other Liabilities:
Deferred income taxes, net		406		362
Deferred income taxes, net - discontinued operations		0		927
Non-trading derivative liabilities		5		4
Benefit obligations		93		97
Regulatory liabilities		1,227		1,201
Other		329		297
Total other liabilities		2,060		2,888
Long-term Debt:
Total long-term debt, net	[5]	2,371		2,457
Commitments and Contingencies (Note 16)
Shareholders’ Equity:
Common stock		0		0
Additional paid-in capital		2,015		2,528
Retained earnings		423		574
Accumulated other comprehensive income (loss)		5		6
Total shareholders’ equity		2,443		3,108
Total Liabilities and Shareholders’ Equity		8,214		10,112
Series A Preferred Stock [Member]
Shareholders’ Equity:
Preferred Stock		790		0
Series B Preferred Stock [Member]
Shareholders’ Equity:
Preferred Stock		$ 950		$ 0

[1] CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

[2] Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

[3] On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

[4] Includes amounts due or exchangeable within one year of the date noted.

[5] Issued by CERC Corp.

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)		Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	[1]	$ 4,231,000,000	$ 260,000,000
Bad debt reserve		18,000,000	19,000,000
Accounts receivable		1,190,000,000	1,000,000,000
Prepaid expense and other current assets		192,000,000	241,000,000
Other Assets:
Regulatory assets		$ 1,967,000,000	$ 2,347,000,000
Shareholders’ Equity:
Cumulative preferred stock par value (in dollars per share)		$ 0.01	$ 0.01
Cumulative preferred stock authorized (in shares)		20,000,000	20,000,000
Common stock par value (in dollars per share)		$ 0.01	$ 0.01
Common stock authorized (in shares)		1,000,000,000	1,000,000,000
Common stock outstanding (in shares)		501,197,784	431,044,845
Variable Interest Entity, Primary Beneficiary [Member]
Current Assets:
Cash and cash equivalents		$ 335,000,000	$ 230,000,000
Accounts receivable		56,000,000	73,000,000
Prepaid expense and other current assets		34,000,000	35,000,000
Other Assets:
Regulatory assets		1,059,000,000	1,590,000,000
Houston Electric [Member]
Current Assets:
Cash and cash equivalents	[2]	335,000,000	238,000,000
Prepaid expense and other current assets		61,000,000	62,000,000
Other Assets:
Regulatory assets		1,124,000,000	1,570,000,000
Houston Electric [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current Assets:
Cash and cash equivalents		335,000,000	230,000,000
Bad debt reserve		1,000,000	1,000,000
Accounts receivable		56,000,000	73,000,000
Prepaid expense and other current assets		34,000,000	35,000,000
Other Assets:
Regulatory assets		1,059,000,000	1,590,000,000
CERC Corp [Member]
Current Assets:
Cash and cash equivalents		14,000,000	12,000,000
Bad debt reserve		17,000,000	18,000,000
Accounts receivable		894,000,000	713,000,000
Prepaid expense and other current assets		115,000,000	166,000,000
Other Assets:
Regulatory assets		$ 181,000,000	$ 181,000,000
Cumulative Preferred Stock [Member]
Shareholders’ Equity:
Cumulative preferred stock par value (in dollars per share)		$ 0.01	$ 0.01
Cumulative preferred stock authorized (in shares)		20,000,000	20,000,000
Series A Preferred Stock [Member]
Shareholders’ Equity:
Cumulative preferred stock par value (in dollars per share)		$ 0.01	$ 0.00
Preferred Stock, Liquidation Preference, Value		$ 800,000,000	$ 0
Cumulative preferred stock outstanding (in shares)		800,000	0
Series B Preferred Stock [Member]
Shareholders’ Equity:
Cumulative preferred stock par value (in dollars per share)		$ 0.01	$ 0.00
Preferred Stock, Liquidation Preference, Value		$ 977,500,000	$ 0
Cumulative preferred stock outstanding (in shares)		977,500	0

[1] CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

[2] Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

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STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 368	$ 1,792	$ 432
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,243	1,036	1,126
Amortization of deferred financing costs	48	24	26
Deferred income taxes	48	(770)	213
Unrealized loss (gain) on marketable securities	22	(7)	(326)
Loss (gain) on indexed debt securities	232	(49)	413
Write-down of natural gas inventory	2	0	1
Equity in earnings of unconsolidated affiliates, net of distributions	(40)	(265)	(208)
Pension contributions	(69)	(48)	(9)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	(154)	(216)	(117)
Inventory	1	(7)	34
Taxes receivable	0	30	142
Accounts payable	220	136	133
Fuel cost recovery	33	(85)	(72)
Non-trading derivatives, net	103	(84)	30
Margin deposits, net	5	(55)	101
Interest and taxes accrued	40	5	5
Net regulatory assets and liabilities	28	(107)	(60)
Other current assets	0	(3)	(25)
Other current liabilities	(24)	34	22
Other assets	6	(4)	(16)
Other liabilities	12	36	30
Other, net	12	24	48
Net cash provided by operating activities	2,136	1,417	1,923
Cash Flows from Investing Activities:
Capital expenditures	(1,651)	(1,426)	(1,414)
Acquisitions, net of cash acquired	0	(132)	(102)
Decrease in notes receivable - unconsolidated affiliate	0	0	363
Investment in preferred units - unconsolidated affiliate	0	0	(363)
Distributions from unconsolidated affiliates in excess of cumulative earnings	30	297	297
Proceeds from sale of marketable securities	398	0	178
Other, net	16	4	7
Net cash provided by (used in) investing activities	(1,207)	(1,257)	(1,034)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(39)	4	(5)
Proceeds from (payments of) commercial paper, net	(1,543)	349	469
Proceeds from long-term debt, net	2,495	1,096	600
Payments of long-term debt	(484)	(1,211)	(1,218)
Loss on reacquired debt	0	(5)	(22)
Debt and equity issuance costs	(47)	(13)	(9)
Payment of dividends on Common Stock	(499)	(461)	(443)
Payment of dividends on preferred stock	(11)	0	0
Proceeds from issuance of Common Stock, net	1,844	0	0
Proceeds from issuance of preferred stock, net	1,740	0	0
Distribution to ZENS holders	(398)	0	(178)
Other, net	(5)	(4)	(2)
Net cash provided by (used in) financing activities	3,053	(245)	(808)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	3,982	(85)	81
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	296	381	300
Cash, Cash Equivalents and Restricted Cash at End of Year	4,278	296	381
Houston Electric [Member]
Cash Flows from Operating Activities:
Net income	336	433	276
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	917	724	838
Amortization of deferred financing costs	11	13	14
Deferred income taxes	(38)	(98)	(34)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	11	(73)	(1)
Accounts receivable/payable–affiliated companies	20	(46)	63
Inventory	(16)	15	(1)
Taxes receivable	(5)	6	53
Accounts payable	(1)	59	(4)
Non-trading derivatives, net	5	0	0
Interest and taxes accrued	(2)	7	4
Net regulatory assets and liabilities	(97)	(148)	(110)
Other current assets	(2)	(6)	(6)
Other current liabilities	(26)	16	21
Other assets	(3)	13	(8)
Other liabilities	17	(4)	(4)
Other, net	(12)	(6)	1
Net cash provided by operating activities	1,115	905	1,102
Cash Flows from Investing Activities:
Capital expenditures	(922)	(875)	(862)
Increase in notes receivable–affiliated companies	0	96	(96)
Other, net	11	3	7
Net cash provided by (used in) investing activities	(911)	(776)	(951)
Cash Flows from Financing Activities:
Proceeds from long-term debt, net	398	298	600
Payments of long-term debt	(434)	(411)	(590)
Dividend to parent	(209)	(180)	(135)
Increase (decrease) in notes payable–affiliated companies	(59)	60	(312)
Debt issuance costs	(4)	(3)	(6)
Contribution from parent	200	0	374
Net cash provided by (used in) financing activities	(108)	(236)	(69)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	96	(107)	82
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	274	381	299
Cash, Cash Equivalents and Restricted Cash at End of Year	370	274	381
CERC Corp [Member]
Cash Flows from Operating Activities:
Net income	208	745	245
Income (loss) from discontinued operations, net of tax	138	161	127
Income (loss) from continuing operations	70	584	118
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	293	279	249
Amortization of deferred financing costs	9	9	9
Deferred income taxes	31	(224)	56
Write-down of natural gas inventory	2	0	1
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	(155)	(143)	(122)
Accounts receivable/payable–affiliated companies	9	0	4
Inventory	17	(22)	34
Accounts payable	163	64	117
Fuel cost recovery	33	(85)	(72)
Non-trading derivatives, net	98	(82)	29
Margin deposits, net	5	(55)	101
Interest and taxes accrued	0	(41)	26
Net regulatory assets and liabilities	50	(27)	0
Other current assets	4	2	(19)
Other current liabilities	(3)	15	2
Other assets	5	(8)	(21)
Other liabilities	6	6	(2)
Other, net	1	6	2
Net cash provided by operating activities from continuing operations	638	278	512
Net cash provided by operating activities from discontinued operations	176	0	0
Net cash provided by operating activities	814	278	512
Cash Flows from Investing Activities:
Capital expenditures	(633)	(513)	(517)
Acquisitions, net of cash acquired	0	(132)	(102)
Increase in notes receivable–affiliated companies	(114)	0	0
Other, net	3	2	1
Net cash used in investing activities from continuing operations	(744)	(643)	(618)
Net cash provided by investing activities from discontinued operations	47	297	660
Net cash provided by (used in) investing activities	(697)	(346)	42
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(39)	4	(5)
Proceeds from (payments of) commercial paper, net	(688)	329	350
Proceeds from long-term debt, net	599	298	0
Payments of long-term debt	0	(550)	(325)
Dividend to parent	(360)	(601)	(643)
Increase (decrease) in notes payable–affiliated companies	(570)	570	0
Loss on reacquired debt	0	(5)	0
Debt issuance costs	(5)	(4)	0
Contribution from parent	960	38	72
Other, net	(1)	0	(2)
Net cash used in financing activities from continuing operations	(104)	79	(553)
Net cash provided by financing activities from discontinued operations	0	0	0
Net cash provided by (used in) financing activities	(104)	79	(553)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	13	11	1
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	12	1	0
Cash, Cash Equivalents and Restricted Cash at End of Year	$ 25	$ 12	$ 1

XML

STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Preferred Stock [Member] Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Common Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] Series A Preferred Stock [Member]	Retained Earnings [Member] Series B Preferred Stock [Member]	AOCI Attributable to Parent [Member]	Houston Electric [Member]	Houston Electric [Member] Common Stock [Member]	Houston Electric [Member] Additional Paid-in Capital [Member]	Houston Electric [Member] Retained Earnings [Member]	Houston Electric [Member] AOCI Attributable to Parent [Member]	CERC Corp [Member]	CERC Corp [Member] Common Stock [Member]	CERC Corp [Member] Additional Paid-in Capital [Member]	CERC Corp [Member] Retained Earnings [Member]	CERC Corp [Member] AOCI Attributable to Parent [Member]
Balance, beginning of year at Dec. 31, 2015				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of stock					0	0	0
Balance, end of year at Dec. 31, 2016				0
Balance, beginning of year at Dec. 31, 2015							430,000,000								1,000					1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							1,000,000
Balance, end of year at Dec. 31, 2016							431,000,000								1,000					1,000
Balance, beginning of year at Dec. 31, 2015				$ 0			$ 4	$ 4,180		$ (657)			$ (66)		$ 0	$ 1,322	$ 279	$ 0		$ 0	$ 2,417	$ 828	$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							0	15
Issuances of stock					$ 0	$ 0	0		$ 0
Contribution From Parent																374					72
Capital distribution associated with the Internal Spin	$ 0													$ 0					$ 0		0
Other																					0
Net income	432									432				276			276		245			245
Common Stock dividends declared ($1.12, $1.3475 and $1.03 per share, respectively)										(443)
Preferred stock dividends declared											$ 0	$ 0
Dividend to parent																	(135)					(643)
Other comprehensive income (loss)													(5)					1					(6)
Balance, end of year at Dec. 31, 2016	$ 3,460			$ 0			$ 4	4,195		(668)			(71)	2,117	$ 0	1,696	420	1	2,922	$ 0	2,489	430	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2018-02 | Adjustments for New Accounting Principle, Early Adoption [Member]										0			0									0	0
Issuances of stock					0	0	0
Balance, end of year at Dec. 31, 2017		0	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							0
Balance, end of year at Dec. 31, 2017	431,044,845						431,000,000								1,000					1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							$ 0	14
Issuances of stock					$ 0	$ 0	0		0
Contribution From Parent																0					38
Capital distribution associated with the Internal Spin	$ 0													0					0		0
Other																					1
Net income	1,792									1,792				433			433		745			745
Common Stock dividends declared ($1.12, $1.3475 and $1.03 per share, respectively)										(581)
Preferred stock dividends declared											0	0
Dividend to parent																	(180)					(601)
Other comprehensive income (loss)													3					(1)					3
Balance, end of year at Dec. 31, 2017	$ 4,688			$ 0			$ 4	4,209		543			(68)	2,369	$ 0	1,696	673	0	3,108	$ 0	2,528	574	6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2018-02 | Adjustments for New Accounting Principle, Early Adoption [Member]										0			0									0	0
Issuances of stock					1,000,000	1,000,000	70,000,000
Balance, end of year at Dec. 31, 2018		800,000	977,500	2,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							0
Balance, end of year at Dec. 31, 2018	501,197,784						501,000,000								1,000					1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances related to benefit and investment plans							$ 0	19
Issuances of stock					$ 790	$ 950	1		$ 1,844
Contribution From Parent																200					960
Capital distribution associated with the Internal Spin	$ 0													0					(1,473)		(1,473)
Other																					0
Net income	368									368				336			336		208			208
Common Stock dividends declared ($1.12, $1.3475 and $1.03 per share, respectively)										(523)
Preferred stock dividends declared		$ (26)	$ (28)								$ (26)	$ (28)
Dividend to parent																	(209)					(360)
Other comprehensive income (loss)													(25)					(14)					0
Balance, end of year at Dec. 31, 2018	$ 8,058			$ 1,740			$ 5	$ 6,072		349			(108)	$ 2,682	$ 0	$ 1,896	$ 800	$ (14)	$ 2,443	$ 0	$ 2,015	423	5
Balance, end of year (Adjustments for New Accounting Principle, Early Adoption [Member]) at Dec. 31, 2018																							2,443
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2018-02 | Adjustments for New Accounting Principle, Early Adoption [Member]										$ 15			$ (15)									$ 1	$ (1)

XML

STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares			12 Months Ended
	Dec. 12, 2018	Oct. 23, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 22, 2018
Cumulative preferred stock par value (in dollars per share)			$ 0.01	$ 0.01	$ 0.01
Cumulative preferred stock shares authorized (in shares)			20,000,000	20,000,000	20,000,000
Common stock shares par value (in dollars per share)			$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (in shares)			1,000,000,000	1,000,000,000	1,000,000,000
Common stock dividends declared per share			$ 1.12	$ 1.3475	$ 1.03
Series A Preferred Stock [Member]
Cumulative preferred stock par value (in dollars per share)			0.01	0.00		$ 1,000
Preferred stock dividends declared per share	$ 32.1563		32.1563	0.0000	0.0000
Series B Preferred Stock [Member]
Cumulative preferred stock par value (in dollars per share)			0.01	0.00
Preferred stock dividends declared per share	$ 17.5000	$ 11.6667	$ 29.1667	$ 0.0000	$ 0.0000

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Background

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Background [Text Block]

Background

No Registrant makes any representations as to the information related solely to CenterPoint Energy or the subsidiaries of CenterPoint Energy other than itself.

General. Included in this combined Form 10-K are the Financial Statements of CenterPoint Energy, Houston Electric and CERC, which are referred to collectively as the Registrants. The Combined Notes to the Consolidated Financial Statements apply to all Registrants and specific references to Houston Electric and CERC herein also pertain to CenterPoint Energy, unless otherwise indicated.

Background. CenterPoint Energy, Inc. is a public utility holding company and owns interests in Enable as described below. As of December 31, 2018, CenterPoint Energy’s operating subsidiaries, Houston Electric and CERC, owned and operated electric transmission and distribution and natural gas distribution facilities and supplied natural gas to commercial and industrial customers and electric and natural gas utilities.

• Houston Electric engages in the electric transmission and distribution business in the Texas Gulf Coast area that includes the city of Houston; and

• CERC Corp. (i) owns and operates natural gas distribution systems in six states and (ii) obtains and offers competitive variable and fixed-price physical natural gas supplies and services primarily to commercial and industrial customers and electric and natural gas utilities in over 30 states through its wholly-owned subsidiary, CES.

As of December 31, 2018, CenterPoint Energy, indirectly through CNP Midstream, owned approximately 54.0% of the common units representing limited partner interests in Enable, 50% of the management rights and 40% of the incentive distribution rights in Enable GP and also directly owned an aggregate of 14,520,000 Enable Series A Preferred Units. Enable owns, operates and develops natural gas and crude oil infrastructure assets.

On April 21, 2018, CenterPoint Energy entered into the Merger Agreement to acquire Vectren for approximately $6 billion in cash. On February 1, 2019, pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren. For further information about the closing of the Merger, see Note 4.

For a description of CenterPoint Energy’s and CERC’s reportable segments, see Note 19. Houston Electric consists of a single reportable segment, Electric Transmission & Distribution.

XML

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

(a) Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

(b) Principles of Consolidation

The accounts of the Registrants and their wholly-owned and majority-owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation.

As of December 31, 2018, CenterPoint Energy and Houston Electric had VIEs consisting of the Bond Companies, which are consolidated. The consolidated VIEs are wholly-owned, bankruptcy remote special purpose entities that were formed solely for the purpose of securitizing transition and system restoration related property. Creditors of CenterPoint Energy and Houston Electric have no recourse to any assets or revenues of the Bond Companies. The bonds issued by these VIEs are payable only from and secured by transition and system restoration property and the bondholders have no recourse to the general credit of CenterPoint Energy or Houston Electric.

(c) Equity and Investments without a Readily Determinable Fair Value (CenterPoint Energy and CERC)

CenterPoint Energy and CERC generally use the equity method of accounting for investments in entities in which they have an ownership interest between 20% and 50% and exercise significant influence. CenterPoint Energy and CERC also use the equity method for investments in which they have ownership percentages greater than 50%, when they exercise significant influence, do not have control and are not considered the primary beneficiary, if applicable.

Under the equity method, CenterPoint Energy and CERC adjust their investments each period for contributions made, distributions received, respective shares of comprehensive income and amortization of basis differences, as appropriate. CenterPoint Energy and CERC evaluate their equity method investments for impairment when events or changes in circumstances indicate there is a loss in value of the investment that is other than a temporary decline.

CenterPoint Energy and CERC consider distributions received from equity method investments which do not exceed cumulative equity in earnings subsequent to the date of investment to be a return on investment and classify these distributions as operating activities in their respective Statements of Consolidated Cash Flows. CenterPoint Energy and CERC consider distributions received from equity method investments in excess of cumulative equity in earnings subsequent to the date of investment to be a return of investment and classify these distributions as investing activities in their respective Statements of Consolidated Cash Flows.

On September 4, 2018, CERC completed the Internal Spin of its equity investment in Enable and Enable GP. For further information regarding the Internal Spin, see Note 11.

Investments without a readily determinable fair value will be measured at cost, less impairment, plus or minus observable prices changes of an identical or similar investment of the same issuer.

(d) Revenues

The Registrants record revenue for electricity delivery and natural gas sales and services under the accrual method and these revenues are recognized upon delivery to customers. Electricity deliveries not billed by month-end are accrued based on actual AMS data, daily supply volumes and applicable rates. Natural gas sales not billed by month-end are accrued based upon estimated purchased gas volumes, estimated lost and unaccounted for gas and currently effective tariff rates. For further discussion, see Note 5.

(e) Long-lived Assets and Intangibles Subject to Amortization

The Registrants record property, plant and equipment at historical cost and expense repair and maintenance costs as incurred.

The Registrants periodically evaluate long-lived assets, including property, plant and equipment, and specifically identifiable intangibles subject to amortization, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets compared to the carrying value of the assets.

(f) Regulatory Assets and Liabilities

The Registrants apply the guidance for accounting for regulated operations to the Electric Transmission & Distribution reportable segment and the Natural Gas Distribution reportable segment. The Registrants’ rate-regulated subsidiaries may collect revenues subject to refund pending final determination in rate proceedings. In connection with such revenues, estimated rate refund liabilities are recorded which reflect management’s current judgment of the ultimate outcomes of the proceedings.

The Registrants’ rate-regulated businesses recognize removal costs as a component of depreciation expense in accordance with regulatory treatment. In addition, a portion of the amount of removal costs collected from customers that relate to AROs has been reclassified from a regulatory liability to an asset retirement liability in accordance with accounting guidance for AROs.

For further detail on the Registrants’ regulatory assets and liabilities, see Note 7.

(g) Depreciation and Amortization Expense

The Registrants compute depreciation and amortization using the straight-line method based on economic lives or regulatory-mandated recovery periods. Amortization expense includes amortization of certain regulatory assets and other intangibles.

(h) Capitalization of Interest and AFUDC

The Registrants capitalize interest and AFUDC as a component of projects under construction and amortize over the assets’ estimated useful lives once the assets are placed in service. AFUDC represents the composite interest cost of borrowed funds and a reasonable return on the equity funds used for construction for subsidiaries that apply the guidance for accounting for regulated operations. Although AFUDC increases both utility plant and earnings, it is realized in cash when the assets are included in rates.

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Interest and AFUDC debt (1)	$	8	$	6	$	2	$	9	$	6	$	2	$	8	$	6	$	2
AFUDC equity (2)	12		10		2		11		10		1		7		6		1

(1) Included in Interest and other finance charges on the Registrants’ respective Statements of Consolidated Income.

(2) Included in Other Income (Expense) on the Registrants’ respective Statements of Consolidated Income.

(i) Income Taxes

Houston Electric and CERC are included in CenterPoint Energy’s U.S. federal consolidated income tax return. Houston Electric and CERC report their income tax provision on a separate entity basis pursuant to a tax sharing agreement with CenterPoint Energy.  Current federal and certain state income taxes are payable to or receivable from CenterPoint Energy.

The Registrants use the asset and liability method of accounting for deferred income taxes. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is established against deferred tax assets for which management believes realization is not considered to be more likely than not. The Registrants recognize interest and penalties as a component of income tax expense (benefit), as applicable, in their respective Statements of Consolidated Income. CenterPoint Energy reports the income tax provision associated with its interest in Enable in income tax expense (benefit) in its Statements of Consolidated Income.

On December 22, 2017, President Trump signed into law comprehensive tax reform legislation informally called the Tax Cuts and Jobs Acts, or TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018. See Note 15 for further discussion of the impacts of tax reform implementation.

To the extent certain EDIT of the Registrants’ rate-regulated subsidiaries may be recoverable or payable through future rates, regulatory assets and liabilities have been recorded, respectively.

The Registrants use the portfolio approach to recognize income tax effects on other comprehensive income from accumulated other comprehensive income.

(j) Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount and do not bear interest. Management reviews the outstanding accounts receivable, as well as the bad debt write-offs experienced in the past, and establishes an allowance for doubtful accounts. Account balances are charged off against the allowance when management determines it is probable the receivable will not be recovered.

The table below summarizes the Registrants’ provision for doubtful accounts for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Provision for doubtful accounts	$	16	$	—	$	16	$	14	$	1	$	13	$	7	$	—	$	7

(k) Inventory

The Registrants’ inventory consists principally of materials and supplies and, for CERC, natural gas. Materials and supplies are valued at the lower of average cost or market.  Materials and supplies are recorded to inventory when purchased and subsequently charged to expense or capitalized to plant when installed. Natural gas inventories of CERC’s Energy Services business segment at locations qualifying for and utilizing the fair value hedge accounting election are valued at fair value; inventories at locations not qualifying for or not utilizing the fair value hedge accounting election are valued at the lower of average cost or market. During 2018, 2017 and 2016, CERC recorded write-downs of natural gas inventory to the lower of average cost or market which are disclosed on the respective Statements of Consolidated Cash Flows.

(l) Derivative Instruments

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business.  The Registrants utilize derivative instruments such as physical forward contracts, swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows. Such derivatives are recognized in the Registrants’ Consolidated Balance Sheets at their fair value unless the Registrant elects the normal purchase and sales exemption for qualified physical transactions. A derivative may be designated as a normal purchase or normal sale if the intent is to physically receive or deliver the product for use or sale in the normal course of business.

CenterPoint Energy has a Risk Oversight Committee composed of corporate and reportable segment officers that oversees commodity price, weather and credit risk activities, including the Registrants’ marketing, risk management services and hedging activities. The committee’s duties are to establish the Registrants’ commodity risk policies, allocate board-approved commercial risk limits, approve the use of new products and commodities, monitor positions and ensure compliance with the Registrants’ risk management policies and procedures and limits established by CenterPoint Energy’s Board of Directors.

The Registrants’ policies prohibit the use of leveraged financial instruments. A leveraged financial instrument, for this purpose, is a transaction involving a derivative whose financial impact will be based on an amount other than the notional amount or volume of the instrument.

(m) Investments in Equity Securities (CenterPoint Energy and CERC)

CenterPoint Energy and CERC report equity securities at estimated fair value in their respective Consolidated Balance Sheets, and any unrealized holding gains and losses are recorded as Other Income (Expense) in their respective Statements of Consolidated Income.

(n) Environmental Costs

The Registrants expense or capitalize environmental expenditures, as appropriate, depending on their future economic benefit. The Registrants expense amounts that relate to an existing condition caused by past operations that do not have future economic benefit. The Registrants record undiscounted liabilities related to these future costs when environmental assessments and/or remediation activities are probable and the costs can be reasonably estimated.

(o) Cash and Cash Equivalents and Restricted Cash

For purposes of reporting cash flows, the Registrants consider cash equivalents to be short-term, highly-liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents held by the Bond Companies (VIEs) solely to support servicing the Securitization Bonds as of December 31, 2018 and 2017 are reflected on CenterPoint Energy’s and Houston Electric’s Consolidated Balance Sheets.

In connection with the issuance of Securitization Bonds, CenterPoint Energy and Houston Electric were required to establish restricted cash accounts to collateralize the bonds that were issued in these financing transactions. These restricted cash accounts are not available for withdrawal until the maturity of the bonds and are not included in cash and cash equivalents. For more information on restricted cash see Note 20.

(p) Preferred Stock and Dividends

Preferred stock is evaluated to determine balance sheet classification, and all conversion and redemption features are evaluated for bifurcation treatment. Proceeds received net of issuance costs are recognized on the settlement date. Cash dividends become a liability once declared. Income available to common stockholders is computed by deducting from net income the dividends accumulated and earned during the period on cumulative preferred stock.

(q) Purchase Accounting

The Registrants evaluate acquisitions to determine when a set of acquired activities and assets represent a business.  When control of a business is obtained, the Registrants apply the acquisition method of accounting and record the assets acquired, liabilities assumed and any non-controlling interest obtained based on fair value at the acquisition date. The excess of the fair value of purchase consideration over the fair value of the net assets acquired is recorded as goodwill. The results of operations of the acquired business are included in the Registrants’ respective Statements of Consolidated Income beginning on the date of the acquisition.

(r) New Accounting Pronouncements

The following table provides an overview of recently adopted or issued accounting pronouncements applicable to all the Registrants, unless otherwise noted.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2014-09- Revenue from Contracts with Customers (Topic 606) and related amendments	This standard provides a comprehensive new revenue recognition model that requires revenue to be recognized in a manner that depicts the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. Transition method: modified retrospective	January 1, 2018	Note 5 addresses the disclosure requirements. Adoption of the standard did not result in significant changes to revenue recognition. A substantial amount of the Registrants’ revenues are tariff and/or derivative based, which were not significantly impacted by these ASUs.
ASU 2017-05- Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets	This standard clarifies when and how to apply ASC 610-20, which was issued as part of ASU 2014-09. It amends or supersedes the guidance in ASC 350 and ASC 360 on determining a gain or loss recognized upon the derecognition of nonfinancial assets. This standard also eliminates industry specific guidance, including ASC 360-20 Property, Plant, and Equipment - Real Estate Sales, for the recognition of gains or losses upon the sale of in-substance real estate. Transition method: modified retrospective	January 1, 2018	CenterPoint Energy and CERC elected to apply the practical expedient upon adoption to only evaluate transactions that were not determined to be complete as of the date of adoption. Subsequent to adoption, gains or losses on sales or dilution events in CenterPoint Energy’s investment in Enable may result in gains or losses recognized in earnings.
ASU 2016-01-Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2018-03-Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This standard requires equity investments that do not result in consolidation and are not accounted for under the equity method to be measured at fair value and to recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. It does not change the guidance for classifying and measuring investments in debt securities and loans. It also changes certain disclosure requirements and other aspects related to recognition and measurement of financial assets and financial liabilities. Transition method: cumulative-effect adjustment to beginning retained earnings, and two features prospective	January 1, 2018	The adoption of this standard did not have an impact on the Registrants’ financial position, results of operations or cash flows. The Registrants elected the practicability exception for investments without a readily determinable fair value to be measured at cost. This includes the Enable Series A Preferred Units owned by CenterPoint Energy, which were previously accounted for under the cost method. See Note 11 for further discussion.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2016-15- Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This standard provides clarifying guidance on the classification of certain cash receipts and payments in the statement of cash flows and eliminates the variation in practice related to such classifications. Transition method:retrospective	January 1, 2018	The adoption did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, CenterPoint Energy’s and Houston Electric’s Statements of Consolidated Cash Flows reflect an increase in investing activities and a corresponding decrease in operating activities of $2 million, $4 million and $8 million for the years ended December 31, 2018, 2017 and 2016, respectively, due to the requirement that cash proceeds from COLI policies be classified as cash inflows from investing activity.
ASU 2016-18- Statement of Cash Flows (Topic 230): Restricted Cash	This standard requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, restricted cash and restricted cash equivalents. As a result, the statement of cash flows will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents. When cash, cash equivalents, restricted cash and restricted cash equivalents are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. Transition method: retrospective	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, the Registrants’ respective Statements of Consolidated Cash Flows are reconciled to cash, cash equivalents and restricted cash, resulting in a decrease in investing activities of $11 million for each of CenterPoint Energy’s and CERC’s respective Statements of Consolidated Cash Flows for the year ended December 31, 2018. In addition, each of CenterPoint Energy and Houston Electric showed a decrease of $4 million and an increase of $5 million in investing activities for the years ended December 31, 2017 and 2016, respectively, in their respective Statements of Consolidated Cash Flows. See Note 20 for further discussion.
ASU 2017-07- Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This standard requires an employer to report the service cost component of the net periodic pension cost and postretirement benefit cost in the same line item(s) as other employee compensation costs arising from services rendered during the period; all other components will be presented separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. Transition method: retrospective for the presentation of the service cost component and other components; prospective for the capitalization of the service cost component	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations, cash flows or disclosures; however, it resulted in the increases to operating income and corresponding decreases to other income reported in the table below. Other components of net periodic costs previously capitalized in assets are recorded as regulatory assets by the Registrants’ rate-regulated businesses prospectively from date of adoption.
ASU 2017-12- Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This standard, including standards amending this standard, expands an entity’s ability to hedge and account for risk components, reduces the complexity of applying certain aspects of hedge accounting and updates the presentation and disclosure requirements. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness. Transition method: cumulative-effect adjustment for elimination of the separate measurement of ineffectiveness; prospective for presentation and disclosure	July 1, 2018 Applicable January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows. As a result of the adoption, the Registrants will no longer recognize ineffectiveness for derivatives designated as cash flow hedges; all changes in fair value will flow through other comprehensive income. As the Registrants did not have existing cash flow hedges as of the initial application date and the adoption date, no cumulative effective adjustment was recorded. Note 9 reflects disclosures modified upon adoption.
ASU 2018-02-Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA and requires entities to provide certain disclosures regarding stranded tax effects. Transition method: in the period of adoption	October 1, 2018	The adoption of this standard did not impact the Registrants’ results of operations or cash flows. As a result of the adoption, CenterPoint Energy and CERC elected to reclassify a stranded tax benefit of $15 million and $1 million, respectively, primarily related to benefit plans, from accumulated other comprehensive loss and income to Retained earnings on their respective Consolidated Balance Sheets. The reclassification only encompasses the change in the federal corporate income tax rate due to the TCJA.
ASU 2018-13- Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement	This standard eliminates, modifies and adds certain disclosure requirements for fair value measurements. Transition method: prospective for additions and one modification and retrospective for all other amendments	Adoption of eliminations and modifications as of September 30, 2018; Additions will be adopted January 1, 2020	The adoption of this standard did not impact the Registrants’ financial position, results of operations or cash flows. Note 10 reflects the disclosures modified upon adoption.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2018-14-Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans	This standard eliminates, modifies and adds certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Transition method: retrospective	October 1, 2018	The adoption of this standard did not impact the Registrants’ financial position, results of operations, and cash flows. Note 8 reflects the disclosures modified upon adoption.

The table below reflects the impact of adoption of ASU 2017-07 (Compensation—Retirement Benefits (Topic 715)) on each of the Registrants’ respective Statements of Consolidated Income:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Increase to operating income	$	47	$	21	$	11	$	64	$	26	$	23	$	64	$	25	$	23
Decrease to other income	47		21		11		64		26		23		64		25		23

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2016-02- Leases (Topic 842) and related amendments ASU 2018-01- Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842 ASU 2018-10 - Codification Improvements to Topic 842, Leases ASU 2018-11- Leases (Topic 842)-Targeted Improvements ASU 2018-20- Leases (Topic 842)-Narrow-Scope Improvements for Lessors	ASU 2016-02 provides a comprehensive new lease model that requires lessees to recognize assets and liabilities for most leases and would change certain aspects of lessor accounting. Transition method: modified retrospective ASU 2018-01 allows entities to elect not to assess whether existing land easements that were not previously accounted for in accordance with ASC 840 Leases under ASC 842 Leases when transitioning to the new leasing standard. ASU 2018-10 makes sixteen narrow-scope amendments to ASC 842 Leases. ASU 2018-11 allows entities the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption. It also gives lessors the practical expedient to not separate non-lease and lease components when certain criteria are met. ASU 2018-20 updates several narrow-scope changes for lessors, including sales taxes collected from lessees, lessor costs paid directly by lessees, and recognition of variable payments for contracts with lease and non-lease components.	January 1, 2019 Early adoption is permitted	The Registrants have completed the identification of leases under the revised definition. In addition to expanded disclosure for lessees and lessors, which will include qualitative disclosures of the nature of the lease population and additional quantitative information, the Registrants expect to recognize approximately $30 million, $1 million and $28 million of right-of-use assets and lease liabilities on the statements of financial position of CenterPoint Energy, Houston Electric and CERC, respectively, on the date of adoption but do not expect a material impact on their results of operations and cash flows.    The Registrants elected the practical expedient for existing easements provided by ASU 2018-01, and the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption provided by ASU 2018-11.
ASU 2016-13- Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This standard, including standards amending this standard, requires a new model called CECL to estimate credit losses for (1) financial assets subject to credit losses and measured at amortized cost and (2) certain off-balance sheet credit exposures. Upon initial recognition of the exposure, the CECL model requires an entity to estimate the credit losses expected over the life of an exposure based on historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Transition method: modified retrospective	January 1, 2020 Early adoption is permitted starting January 1, 2019	The Registrants are currently assessing the impact that this standard will have on their financial position, results of operations, cash flows and disclosures.

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2018-15- Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	This standard aligns accounting for implementation costs incurred in a cloud computing arrangement that is accounted for as a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The update also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. Transition method: retrospective or prospective	January 1, 2020 Early adoption is permitted	The adoption of this standard will allow the Registrants to capitalize certain implementation costs incurred in cloud computing arrangements that are accounted for as service contracts. The Registrants are currently assessing the impact that adoption of this standard will have on their financial position, results of operations, cash flows and disclosures.

Management believes that other recently adopted standards and recently issued standards that are not yet effective will not have a material impact on the Registrants’ financial position, results of operations or cash flows upon adoption.

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Property, Plant and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Text Block]

Property, Plant and Equipment

(a) Property, Plant and Equipment

Property, plant and equipment includes the following:

		December 31, 2018						December 31, 2017
	Weighted Average Useful Lives	Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net		Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net
CenterPoint Energy	(in years)	(in millions)
Electric Transmission & Distribution	35	$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
Natural Gas Distribution	28	7,257		2,128		5,129		6,735		1,968		4,767
Energy Services	27	121		43		78		102		35		67
Other property	26	741		306		435		698		338		360
Total		$	20,267	$	6,223	$	14,044	$	19,031	$	5,974	$	13,057
Houston Electric
Electric Transmission	45	$	3,077	$	650	$	2,427	$	2,767	$	620	$	2,147
Electric Distribution	33	7,524		2,553		4,971		7,178		2,522		4,656
Other transmission & distribution property	18	1,547		543		1,004		1,551		491		1,060
Total		$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
CERC
Natural Gas Distribution	28	$	7,257	$	2,128	$	5,129	$	6,735	$	1,968	$	4,767
Energy Services	27	121		43		78		102		35		67
Other property	23	53		34		19		51		33		18
Total		$	7,431	$	2,205	$	5,226	$	6,888	$	2,036	$	4,852

(b) Depreciation and Amortization

The following table presents depreciation and amortization expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Depreciation	$	626	$	342	$	264	$	619	$	354	$	243	$	607	$	349	$	230
Amortization of securitized regulatory assets	531		531		—		329		329		—		455		455		—
Other amortization	86		44		29		88		41		36		64		34		19
Total	$	1,243	$	917	$	293	$	1,036	$	724	$	279	$	1,126	$	838	$	249

(c) AROs

The Registrants recorded AROs associated with the removal of asbestos and asbestos-containing material in its buildings, including substation building structures. CenterPoint Energy and Houston Electric also recorded AROs relating to treated wood poles for electric distribution, distribution transformers containing PCB (also known as Polychlorinated Biphenyl), and underground fuel storage tanks. CenterPoint Energy and CERC also recorded AROs relating to gas pipelines abandoned in place. The estimates of future liabilities were developed using historical information, and where available, quoted prices from outside contractors.

A reconciliation of the changes in the ARO liability recorded in Other non-current liabilities on each of the Registrants’ respective Consolidated Balance Sheets is as follows:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy		Houston Electric		CERC
	(in millions)
Beginning balance	$	281		$	35		$	243		$	205	$	33	$	169
Accretion expense (1)	10			1			9			8		1		7
Revisions in estimates (2)	(33		)	(2		)	(31		)	68		1		67
Ending balance	$	258		$	34		$	221		$	281	$	35	$	243

(1) Reflected in Regulatory assets on each of the Registrants’ respective Consolidated Balance Sheets.

(2) In 2018, CenterPoint Energy and CERC reflected a decrease in their respective ARO liability which is primarily attributable to increases in the long-term interest rates used for discounting in the ARO calculation. In 2017, CenterPoint Energy and CERC reflected an increase in their respective ARO liability which is primarily attributable to decreases in the long-term interest rates used for discounting in the ARO calculation.

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Mergers and Acquisitions

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Mergers and Acquisitions [Text Block]

Mergers and Acquisitions

Merger with Vectren (CenterPoint Energy)

On February 1, 2019 (the Merger Date), pursuant to the Merger Agreement, CenterPoint Energy consummated the previously announced Merger and acquired Vectren for approximately $6 billion in cash. Each share of Vectren common stock issued and outstanding immediately prior to the closing was canceled and converted into the right to receive $72.00 in cash per share, without interest. At the closing, each stock unit payable in Vectren common stock or whose value is determined with reference to the value of Vectren common stock, whether vested or unvested, was canceled with cash consideration paid therefor in accordance with the terms of the Merger Agreement. These amounts did not include a stub period cash dividend of $0.41145 per share, which was declared, with CenterPoint Energy’s consent, by Vectren’s board of directors on January 16, 2019, and paid to Vectren stockholders as of the record date of February 1, 2019. See Notes 13 and 14 for further details regarding the Merger financings.

Following the closing, shares of Vectren common stock, which previously traded under the ticker symbol “VVC” on the NYSE, ceased trading on and were delisted from the NYSE.

On the Merger Date, Vectren became a wholly-owned subsidiary of CenterPoint Energy. Vectren, through its wholly owned subsidiary, VUHI, holds three public utilities:

• Indiana Gas provides energy delivery services to natural gas customers located in central and southern Indiana;

• SIGECO provides energy delivery services to electric and natural gas customers located near Evansville in southwestern Indiana and owns and operates electric generation assets to serve its electric customers and optimizes those assets in the wholesale power market; and

• VEDO provides energy delivery services to natural gas customers located near Dayton in west-central Ohio.

Vectren is also involved in non-utility activities through two business units:

• Infrastructure Services provides underground pipeline construction and repair services; and

• ESG provides energy performance contracting and sustainable infrastructure, such as renewables, distributed generation and combined heat and power projects.

As of December 31, 2018, Vectren and its subsidiaries had outstanding $167 million of short-term debt and $2.2 billion of long-term debt, including current maturities. Vectren’s outstanding short-term and long-term debt on the closing date of the Merger became debt of CenterPoint Energy.

The Merger is anticipated to provide significant potential strategic benefits to CenterPoint Energy, including growth opportunities for more rate-regulated investment, more customers for existing products and services and additional products and services for existing customers. Additionally, CenterPoint Energy believes the Merger will increase geographic and business diversity as well as scale in attractive jurisdictions and economies.

The Merger is being accounted for in accordance with ASC 805, Business Combinations, with identifiable assets acquired and liabilities assumed recorded at their estimated fair values on the Merger Date. Due to the limited time between the Merger Date and this filing, CenterPoint Energy’s purchase price allocation for the assets acquired and the liabilities assumed in the Merger has not been completed. CenterPoint Energy will provide the required disclosures in the first quarter of 2019. The results of operations of Vectren will be reported in CenterPoint Energy’s consolidated financial statements beginning on the Merger Date.

CenterPoint Energy incurred transaction costs of $28 million and integration costs of $18 million in connection with the Merger for the year ended December 31, 2018, which were included in operation and maintenance expenses in CenterPoint Energy’s Statements of Consolidated Income.

Acquisition of AEM (CenterPoint Energy and CERC)

On January 3, 2017,CES completed the acquisition of AEM. After working capital adjustments, the final purchase price of $147 million was allocated to identifiable assets acquired and liabilities assumed based on their fair values on the acquisition date.

The goodwill of $5 million recorded as part of the acquisition primarily reflects the value of the complementary operational and geographic footprints, scale and expanded capabilities provided by the acquisition.

The fair value of the identifiable intangible assets and related useful lives included in the final purchase price allocation is as follows:

	Fair Value		Useful Life
	(in millions)		(in years)
Customer relationships	$	25	15

The following unaudited pro forma financial information reflects the consolidated results of operations of CenterPoint Energy and CERC, assuming the AEM acquisition had taken place on January 1, 2016. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved had the acquisition taken place on the dates indicated or the future consolidated results of operations of the combined companies.

	Year Ended December 31,
	2017				2016
	CenterPoint Energy		CERC		CenterPoint Energy		CERC
	(in millions)
Revenues	$	9,614	$	6,603	$	8,541	$	5,467
Net Income (1)	1,792		745		442		255

(1) Net income for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million and $396 million due to the TCJA for CenterPoint Energy and CERC, respectively. See Note 15 for further discussion of the impacts of tax reform implementation.

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Revenue Recognition

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition [Text Block]

Revenue Recognition

The Registrants adopted ASC 606 and all related amendments on January 1, 2018 using the modified retrospective method for those contracts that were not completed as of the date of adoption. Application of the new revenue standard did not result in a cumulative effect adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The adoption of the new standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows.

In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Registrants expect to be entitled to receive in exchange for these goods or services. Contract assets and liabilities are not material.

The following tables disaggregate revenues by reportable segment and major source:

	Year Ended December 31, 2018
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,235		$	3,011		$	493		$	6	$	6,745		$	3,235		$	3,011		$	493		$	1	$	3,505
Derivatives income	(2		)	(2		)	4,028			—		4,024			—			(2		)	4,028			—		4,026
Other (3)	(1		)	(42		)	—			9		(34		)	(1		)	(42		)	—			—		(42		)
Eliminations	—			(36		)	(110		)	—		(146		)	—			(36		)	(110		)	—		(146		)
Total revenues	$	3,232		$	2,931		$	4,411		$	15	$	10,589		$	3,234		$	2,931		$	4,411		$	1	$	7,343
	Year Ended December 31, 2017
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,001		$	2,638		$	480		$	5	$	6,124		$	3,001		$	2,638		$	480		$	—	$	3,118
Derivatives income	(1		)	—			3,569			—		3,568			—			—			3,569			—		3,569
Other (3)	(3		)	1			—			9		7			(3		)	1			—			—		1
Eliminations	—			(33		)	(52		)	—		(85		)	—			(33		)	(52		)	—		(85		)
Total revenues	$	2,997		$	2,606		$	3,997		$	14	$	9,614		$	2,998		$	2,606		$	3,997		$	—	$	6,603
	Year Ended December 31, 2016
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,050		$	2,368		$	288		$	5	$	5,711		$	3,050		$	2,368		$	288		$	—	$	2,656
Derivatives income	1			—			1,811			—		1,812			—			—			1,811			—		1,811
Other (3)	9			41			—			10		60			9			41			—			1		42
Eliminations	—			(29		)	(26		)	—		(55		)	—			(29		)	(26		)	—		(55		)
Total revenues	$	3,060		$	2,380		$	2,073		$	15	$	7,528		$	3,059		$	2,380		$	2,073		$	1	$	4,454

(1) Reflected in Utility revenues in the Statements of Consolidated Income.

(2) Reflected in Non-utility revenues in the Statements of Consolidated Income.

(3) Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

Revenues from Contracts with Customers

Electric Transmission & Distribution. Houston Electric distributes electricity to customers over time and customers consume the electricity when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the PUCT, is recognized as electricity is delivered and represents amounts both billed and unbilled. Discretionary services requested by customers are provided at a point in time with control transferring upon the completion of the service. Revenue for discretionary services is recognized upon completion of service based on the tariff rates set by the PUCT. Payments for electricity distribution and discretionary services are aggregated and received on a monthly basis. Houston Electric performs transmission services over time as a stand-ready obligation to provide a reliable network of transmission systems. Revenue is recognized upon time elapsed, and the monthly tariff rate set by the PUCT. Payments are received on a monthly basis.

Natural Gas Distribution. CERC distributes and transports natural gas to customers over time, and customers consume the natural gas when delivered. Revenue, consisting of both volumetric and fixed tariff rates set by the state governing agency for that service area, is recognized as natural gas is delivered and represents amounts both billed and unbilled. Discretionary services requested by the customer are satisfied at a point in time and revenue is recognized upon completion of service and the tariff rates set by the applicable state regulator. Payments of natural gas distribution, transportation and discretionary services are aggregated and received on a monthly basis.

Energy Services. The majority of CES natural gas sales contracts are considered a derivative, as the contracts typically have a stated minimum or contractual volume of delivery.

For contracts in which CES delivers the full requirement of the natural gas needed by the customer and a volume is not stated, a contract as defined under ASC 606 is created upon the customer’s exercise of its option to take natural gas. CES supplies natural gas to retail customers over time as customers consume the natural gas when delivered. For wholesale customers, CES supplies natural gas at a point in time because the wholesale customer is presumed to have storage capabilities. Control is transferred to both types of customers upon delivery of natural gas. Revenue is recognized on a monthly basis based on the estimated volume of natural gas delivered and the price agreed upon with the customer. Payments are received on a monthly basis.

AMAs are natural gas sales contracts under which CES also assumes management of a customer’s physical storage and/or transportation capacity. AMAs have two distinct performance obligations, which consist of natural gas sales and natural gas delivery because delivery could occur separate from the sale of natural gas (e.g., from storage to customer premises). Most AMAs’ natural gas sales performance obligations are accounted for as embedded derivatives. The transaction price is allocated between the sale of natural gas and the delivery based on the stand-alone selling price as stated in the contract. CES performs natural gas delivery over time as customers take delivery of the natural gas and recognizes revenue on an aggregated monthly basis based on the volume of natural gas delivered and the fees stated within the contract. Payments are received on a monthly basis.

Practical Expedients and Exemption. Sales taxes and other similar taxes collected from customers are excluded from the transaction price.

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Goodwill and Other Intangibles (CenterPoint Energy and CERC)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangibles (CenterPoint Energy and CERC) [Text Block]

Goodwill and Other Intangibles (CenterPoint Energy and CERC)

CenterPoint Energy’s and CERC’s goodwill by reportable segment as of both December 31, 2018 and 2017 is as follows:

	(in millions)
Natural Gas Distribution	$	746
Energy Services (1)	110
Other Operations	11
Total	$	867

(1) Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

CenterPoint Energy and CERC perform goodwill impairment tests at least annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. The impairment evaluation for goodwill is performed by comparing the fair value of each reporting unit with the carrying amount of the reporting unit, including goodwill. The estimated fair value of the reporting unit is primarily determined on the basis of discounted cash flows. If the carrying amount is in excess of the estimated fair value of the reporting unit, then the excess amount is the impairment charge that should be recorded, not to exceed the carrying amount of goodwill. See Note 2(e) for further discussion.

CenterPoint Energy and CERC performed the annual goodwill impairment test in the third quarter of each of 2018 and 2017 and determined that no goodwill impairment charge was required for any reporting unit, which approximate the Registrants’ applicable reportable segments.

The tables below present information on CenterPoint Energy’s and CERC’s finite lived intangible assets recorded in Other non-current assets on the Consolidated Balance Sheets. Finite lived intangible assets are amortized over their estimated useful lives.

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
	(in millions)
Customer relationships	$	86	$	(27	)	$	59	$	86	$	(21	)	$	65
Covenants not to compete	4		(3		)	1		4		(2		)	2
Other	16		(11		)	5		15		(8		)	7
Total	$	106	$	(41	)	$	65	$	105	$	(31	)	$	74

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Amortization expense of intangible assets (1)	$	10	$	13	$	4

(1) Recorded in Depreciation and amortization expenses on CenterPoint Energy’s and CERC’s respective Statements of Consolidated Income.

CenterPoint Energy and CERC estimate that amortization expense of intangible assets with finite lives for the next five years will be as follows:

	Amortization Expense
	(in millions)
2019	$	11
2020	6
2021	6
2022	6
2023	5

XML

Regulatory Accounting

12 Months Ended

Dec. 31, 2018

Regulated Operations [Abstract]

Regulatory Accounting [Text Block]

Regulatory Accounting

The following is a list of regulatory assets and liabilities reflected on the Registrants’ respective Consolidated Balance Sheets as of December 31, 2018 and 2017:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Regulatory Assets:
Current regulatory assets (1)	$	77		$	—		$	77		$	130		$	—		$	130
Non-current regulatory assets:
Securitized regulatory assets	1,059			1,059			—			1,590			1,590			—
Unrecognized equity return (2)	(213		)	(213		)	—			(287		)	(287		)	—
Unamortized loss on reacquired debt	68			68			—			75			75			—
Pension and postretirement-related regulatory asset (3)	725			33			30			646			31			20
Hurricane Harvey restoration costs (4)	68			64			4			64			58			6
Regulatory assets related to TCJA (5)	33			23			10			48			33			15
Other long-term regulatory assets (6)	227			90			137			211			70			140
Total non-current regulatory assets	1,967			1,124			181			2,347			1,570			181
Total regulatory assets	2,044			1,124			258			2,477			1,570			311
Regulatory Liabilities:
Current regulatory liabilities (7)	38			17			21			24			22			2
Non-current regulatory liabilities:
Regulatory liabilities related to TCJA (5)	1,323			847			476			1,354			862			492
Estimated removal costs	886			269			617			878			285			593
Other long-term regulatory liabilities	316			182			134			232			116			116
Total non-current regulatory liabilities	2,525			1,298			1,227			2,464			1,263			1,201
Total regulatory liabilities	2,563			1,315			1,248			2,488			1,285			1,203
Total regulatory assets and liabilities, net	$	(519	)	$	(191	)	$	(990	)	$	(11	)	$	285		$	(892	)

(1) Current regulatory assets are included in Prepaid expenses and other current assets in the Registrants’ respective Consolidated Balance Sheets.

(2) The unrecognized equity return will be recognized as it is recovered in rates through 2024. During the years ended December 31, 2018, 2017 and 2016, Houston Electric recognized approximately $74 million, $42 million and $64 million, respectively, of the allowed equity return. The timing of Houston Electric’s recognition of the equity return will vary each period based on amounts actually collected during the period. The actual amounts recognized are adjusted at least annually to correct any over-collections or under-collections during the preceding 12 months.

(3) Includes a portion of Houston Electric’s and CERC’s NGD’s actuarially determined pension and other postemployment expense in excess of the amount being recovered through rates that is being deferred for rate making purposes, of which $33 million and $4 million as of December 31, 2018, respectively, and $31 million and $7 million as of December 31, 2017, respectively, were not earning a return.

(4) The Registrants suffered damage as a result of Hurricane Harvey, a major storm classified as a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale, that first struck the Texas coast on Friday, August 25, 2017 and remained over the Houston area for the next several days. The unprecedented flooding from torrential amounts of rainfall accompanying the storm caused significant damage to or destruction of residences and businesses served by the Registrants. The Registrants deferred the uninsured storm restoration costs as management believed it was probable that such costs will be recovered through traditional rate adjustment mechanisms for capital costs and through the next base rate proceeding for operation and maintenance expenses. As a result, storm restoration costs did not materially affect the Registrants’ reported net income for 2017. The Registrants are not earning a return on Hurricane Harvey restoration costs.

(5) The EDIT and deferred revenues will be recovered or refunded to customers as required by tax and regulatory authorities. See Note 15 for additional information.

(6) Other long-term regulatory assets that are not earning a return were not material as of December 31, 2018 and 2017.

(7) Current regulatory liabilities are included in Other current liabilities in each of the Registrants’ respective Consolidated Balance Sheets.

XML

Stock-Based Incentive Compensation Plans and Employee Benefit Plans

12 Months Ended

Dec. 31, 2018

Disclosure of Stock-Based Incentive Compensation Plans and Employee Benefit Plans [Abstract]

Stock-Based Incentive Compensation Plans and Employee Benefit Plans [Text Block]

Stock-Based Incentive Compensation Plans and Employee Benefit Plans

(a) Stock-Based Incentive Compensation Plans (CenterPoint Energy)

CenterPoint Energy has LTIPs that provide for the issuance of stock-based incentives, including stock options, performance awards, restricted stock unit awards and restricted and unrestricted stock awards to officers, employees and non-employee directors.  Approximately 14 million shares of Common Stock are authorized under these plans for awards. CenterPoint Energy issues new shares of its Common Stock to satisfy stock-based payments related to LTIPs. Equity awards are granted to employees without cost to the participants.

Compensation costs for the performance and stock awards granted under LTIPs are measured using fair value and expected achievement levels on the grant date.  For performance awards with operational goals, the achievement levels are revised as goals are evaluated. The fair value of awards granted to employees is based on the closing stock price of CenterPoint Energy’s Common Stock on the grant date.  The compensation expense is recorded on a straight-line basis over the vesting period.  Forfeitures are estimated on the date of grant based on historical averages and estimates are updated periodically throughout the vesting period.  

The performance awards granted in 2018, 2017 and 2016 are distributed based upon the achievement of certain objectives over a three-year performance cycle. The stock unit awards granted in 2018, 2017 and 2016 are service based. The stock unit awards generally vest at the end of a three-year period, provided, however, that stock unit awards granted to non-employee directors vested at the end of a one-year period (for awards granted in 2017 and 2016) or vested immediately upon grant (for awards granted in 2018). Upon vesting, both the performance and stock awards are issued to the participants along with the value of dividend equivalents earned over the performance cycle or vesting period.

The following table summarizes CenterPoint Energy’s expenses related to LTIPs for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
LTIP Compensation expense (1)	$	26	$	21	$	19
Income tax benefit recognized	6		8		7
Actual tax benefit realized for tax deductions	5		6		5

(1) Included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income and not capitalized as a part of Inventory or Property, Plant and Equipment.

The following tables summarize CenterPoint Energy’s LTIP activity for 2018:

	Year Ended December 31, 2018
	Shares (Thousands)		Weighted-Average Grant Date Fair Value		Remaining Average Contractual Life (Years)	Aggregate Intrinsic Value (2) (Millions)
Performance Awards(1)
Outstanding and non-vested as of December 31, 2017	3,627		$	22.15
Granted	1,321		26.74
Forfeited or canceled	(721	)	21.72
Vested and released to participants	(409	)	21.31
Outstanding and non-vested as of December 31, 2018	3,818		$	23.91	1	$	57
Stock Awards
Outstanding and non-vested as of December 31, 2017	980		$	22.68
Granted	409		26.62
Forfeited or canceled	(29	)	25.31
Vested and released to participants	(300	)	22.84
Outstanding and non-vested as of December 31, 2018	1,060		$	24.08	1.1	$	30

(1) Reflects maximum performance achievement.

(2) Reflects the impact of current expectations of achievement and stock price.

The weighted average grant date fair values per unit of awards granted were as follows for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(In millions, except for per unit amounts)
Performance Awards
Weighted-average grant date fair value per unit of awards granted	$	26.74	$	26.64	$	18.98
Total intrinsic value of awards received by participants	12		7		7
Vested grant date fair value	9		5		7
Stock Awards
Weighted-average grant date fair value per unit of awards granted	$	26.62	$	26.77	$	19.24
Total intrinsic value of awards received by participants	9		9		6
Vested grant date fair value	7		7		6

As of December 31, 2018, there was $27 million of total unrecognized compensation cost related to non-vested performance and stock awards which is expected to be recognized over a weighted-average period of 1.7 years.

(b) Pension Benefits (CenterPoint Energy)

CenterPoint Energy maintains a non-contributory qualified defined benefit pension plan covering substantially all employees, with benefits determined using a cash balance formula. Substantially all of the Registrants’ employees participate in CenterPoint Energy’s non-contributory qualified defined benefit plan. Under the cash balance formula, participants accumulate a retirement benefit based upon 5% of eligible earnings and accrued interest. Participants are 100% vested in their benefit after completing three years of service. In addition to the non-contributory qualified defined benefit pension plans, CenterPoint Energy maintains unfunded non-qualified benefit restoration plans which allow participants to receive the benefits to which they would have been entitled under CenterPoint Energy’s non-contributory qualified pension plan except for federally mandated limits on qualified plan benefits or on the level of compensation on which qualified plan benefits may be calculated.

CenterPoint Energy’s net periodic cost includes the following components relating to pension, including the non-qualified benefit restoration plan:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Service cost (1)	$	37		$	36		$	38
Interest cost (2)	79			89			93
Expected return on plan assets (2)	(107		)	(97		)	(101		)
Amortization of prior service cost (2)	9			9			9
Amortization of net loss (2)	43			58			63
Net periodic cost	$	61		$	95		$	102

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

CenterPoint Energy used the following assumptions to determine net periodic cost relating to pension benefits:

	Year Ended December 31,
	2018		2017		2016
Discount rate	3.65	%	4.15	%	4.40	%
Expected return on plan assets	6.00		6.00		6.25
Rate of increase in compensation levels	4.45		4.50		4.15

In determining net periodic benefit cost, CenterPoint Energy uses fair value, as of the beginning of the year, as its basis for determining expected return on plan assets.

The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in the Consolidated Balance Sheets as well as the key assumptions of CenterPoint Energy’s pension plans. The measurement dates for plan assets and obligations were December 31, 2018 and 2017.

	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	2,225		$	2,197
Service cost	37			36
Interest cost	79			89
Benefits paid	(201		)	(168		)
Actuarial (gain) loss (1)	(127		)	71
Benefit obligation, end of year	2,013			2,225
Change in Plan Assets
Fair value of plan assets, beginning of year	1,801			1,656
Employer contributions	69			48
Benefits paid	(201		)	(168		)
Actual investment return	(153		)	265
Fair value of plan assets, end of year	1,516			1,801
Funded status, end of year	$	(497	)	$	(424	)

	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(7	)	$	(7	)
Other liabilities-benefit obligations	(490		)	(417		)
Net liability, end of year	$	(497	)	$	(424	)
Actuarial Assumptions
Discount rate (2)	4.35		%	3.65		%
Expected return on plan assets (3)	6.00			6.00
Rate of increase in compensation levels	4.60			4.45
Interest crediting rate	3.75			3.75

(1) Significant sources of gain for 2018 include the increase in discount rate from 3.65% to 4.35% and the mortality projection scale change from MP2017 to MP2018. For 2017, the significant source of loss was the decrease in the discount rate from 4.15% to 3.65%.

(2) The discount rate assumption was determined by matching the projected cash flows of CenterPoint Energy’s plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

(3) The expected rate of return assumption was developed using the targeted asset allocation of CenterPoint Energy’s plans and the expected return for each asset class.

The following table displays pension benefits related to CenterPoint Energy’s pension plans that have accumulated benefit obligations in excess of plan assets:

	December 31,
	2018				2017
	Pension (Qualified)		Pension (Non-qualified)		Pension (Qualified)		Pension (Non-qualified)
	(in millions)
Accumulated benefit obligation	$	1,930	$	61	$	2,090	$	74
Projected benefit obligation	1,952		61		2,151		74
Fair value of plan assets	1,516		—		1,801		—

The accumulated benefit obligation for all defined benefit pension plans on CenterPoint Energy’s Consolidated Balance Sheets was $1,991 million and $2,164 million as of December 31, 2018 and 2017, respectively.

(c) Postretirement Benefits

CenterPoint Energy provides certain healthcare and life insurance benefits for retired employees on both a contributory and non-contributory basis. The Registrants’ employees who were hired before January 1, 2018 and who have met certain age and service requirements at retirement, as defined in the plans, are eligible to participate in these benefit plans. Employees hired on or after January 1, 2018 are not eligible for these benefits, except that employees represented by IBEW Local Union 66 are eligible to participate in certain of the benefits, subject to the applicable age and service requirements. With respect to retiree medical and prescription drug benefits, employees represented by the IBEW Local Union 66 who retire on or after January 1, 2017, and their dependents, receive any such benefits exclusively through the NECA/IBEW Family Medical Care Plan pursuant to the terms of the renegotiated collective bargaining agreement entered into in May 2016. Houston Electric and CERC are required to fund a portion of their obligations in accordance with rate orders. All other obligations are funded on a pay-as-you-go basis.

Postretirement benefits are accrued over the active service period of employees. The net postretirement benefit cost includes the following components:

	Year Ended December 31,
	2018									2017									2016
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Service cost (1)	$	2		$	—		$	1		$	2		$	1		$	1		$	2		$	1		$	1
Interest cost (2)	13			8			4			16			9			5			16			10			4
Expected return on plan assets (2)	(5		)	(4		)	(1		)	(5		)	(4		)	(1		)	(6		)	(5		)	(1		)
Amortization of prior service cost (credit) (2)	(5		)	(5		)	1			(5		)	(6		)	1			(3		)	(4		)	—
Amortization of net loss (2)	—			—			—			—			—			—			1			1			1
Curtailment (3)	—			—			—			—			—			—			(5		)	(4		)	(1		)
Net postretirement benefit cost (credit)	$	5		$	(1	)	$	5		$	8		$	—		$	6		$	5		$	(1	)	$	4

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in each of the Registrants’ respective Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

(3) A curtailment gain or loss is required when the expected future services of a significant number of current employees are reduced or eliminated for the accrual of benefits. During 2016, postretirement healthcare benefits were amended resulting in a net curtailment gain of $5 million. In May 2016, Houston Electric entered into a renegotiated collective bargaining agreement with the IBEW Local Union 66 that provides that for Houston Electric bargaining unit employees covered under the agreement who retire on or after January 1, 2017, retiree medical and prescription drug coverage will be provided exclusively through the NECA/IBEW Family Medical Care Plan in exchange for the payment of monthly premiums as determined under the agreement. As a result, the accrued postretirement benefits related to such future CenterPoint Energy and Houston Electric union retirees were eliminated. Houston Electric recognized a curtailment gain of $3 million as an accelerated recognition of the prior service credit that would otherwise be recognized in future periods for the postretirement plan. CenterPoint Energy also recognized an additional curtailment gain of $2 million in October 2016 related to other amendments in the postretirement plan.

The following assumptions were used to determine net periodic cost relating to postretirement benefits:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Discount rate	3.60	%	3.60	%	3.60	%	4.15	%	4.15	%	4.15	%	4.35	%	4.35	%	4.35	%
Expected return on plan assets	4.55		4.75		3.85		4.50		4.75		3.60		4.80		5.00		3.95

The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in consolidated balance sheets and the key assumptions of the postretirement plans. The measurement dates for plan assets and benefit obligations were December 31, 2018 and 2017.

	December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	386		$	225		$	109		$	383		$	217		$	115
Service cost	2			—			1			2			1			1
Interest cost	13			8			4			16			9			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actuarial (gain) loss (1)	(52		)	(56		)	1			4			10			(6		)
Benefit obligation, end of year	331			166			110			386			225			109
Change in Plan Assets
Fair value of plan assets, beginning of year	120			93			26			113			88			25
Employer contributions	14			9			4			16			10			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actual investment return	(2		)	(2		)	—			10			7			2
Fair value of plan assets, end of year	114			89			25			120			93			26
Funded status, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(6	)	$	—		$	(3	)	$	(6	)	$	—		$	(4	)
Other liabilities-benefit obligations	(211		)	(77		)	(82		)	(260		)	(132		)	(79		)
Net liability, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Actuarial Assumptions
Discount rate (2)	4.35		%	4.35		%	4.35		%	3.60		%	3.60		%	3.60		%
Expected return on plan assets (3)	4.60			4.70			4.15			4.55			4.75			3.85
Medical cost trend rate assumed for the next year - Pre-65	5.95			5.95			5.95			6.15			6.15			6.15
Medical/prescription drug cost trend rate assumed for the next year - Post-65	28.60			28.60			28.60			23.85			23.85			23.85
Prescription drug cost trend rate assumed for the next year - Pre-65	9.20			9.20			9.20			9.85			9.85			9.85
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50			4.50			4.50			4.50			4.50			4.50
Year that the cost trend rates reach the ultimate trend rate - Pre-65	2026			2026			2026			2026			2026			2026
Year that the cost trend rates reach the ultimate trend rate - Post-65	2027			2027			2027			2024			2024			2024

(1) Significant sources of gain for 2018 include the increase in the discount rate from 3.60% to 4.35%, favorable benefit claims experience and cost trend rates in addition to the change in mortality projection scale from MP2017 to MP2018.

(2) The discount rate assumption was determined by matching the projected cash flows of the plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

(3) The expected rate of return assumption was developed using the targeted asset allocation of the plans and the expected return for each asset class.

(d) Accumulated Other Comprehensive Income (Loss) (CenterPoint Energy and CERC)

CenterPoint Energy recognizes the funded status of its pension plans and other postretirement plans on its Consolidated Balance Sheets. To the extent this obligation exceeds amounts previously recognized in the Statements of Consolidated Income, CenterPoint Energy records a regulatory asset for that portion related to its rate regulated utilities.  To the extent that excess liability does not relate to a rate regulated utility, the offset is recorded as a reduction to equity in accumulated other comprehensive income.

Amounts recognized in accumulated other comprehensive loss (gain) consist of the following:

	December 31,
	2018								2017
	Pension Benefits		Postretirement Benefits						Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy			CERC			CenterPoint Energy		CenterPoint Energy			CERC
	(in millions)
Unrecognized actuarial loss (gain)	$	109	$	(7	)	$	(3	)	$	94	$	(8	)	$	(2	)
Unrecognized prior service cost	1		5			5			1		6			6
Deferred tax benefit (1)	—		—			(9		)	—		—			(11		)
Net amount recognized in accumulated other comprehensive loss (gain)	$	110	$	(2	)	$	(7	)	$	95	$	(2	)	$	(7	)

(1) CenterPoint Energy’s and CERC’s postretirement benefit obligation is reduced by the impact of previously non-taxable government subsidies under the Medicare Prescription Drug Act. Because the subsidies were non-taxable, the temporary difference used in measuring the deferred tax impact was determined on the unrecognized losses excluding such subsidies.

The changes in plan assets and benefit obligations recognized in other comprehensive income during 2018 are as follows:

	Pension Benefits			Postretirement Benefits
	CenterPoint Energy			CenterPoint Energy		CERC
	(in millions)
Net loss (gain)	$	22		$	—	$	(1	)
Amortization of net loss	(6		)	—		—
Amortization of prior service cost	(1		)	—		(1		)
Total recognized in comprehensive income	$	15		$	—	$	(2	)
Total expense recognized in net periodic costs and Other comprehensive income	$	76		$	5	$	3

(e) Pension Plan Assets (CenterPoint Energy)

In managing the investments associated with the benefit plans, CenterPoint Energy’s objective is to achieve and maintain a fully funded plan.  This objective is expected to be achieved through an investment strategy that manages liquidity requirements while maintaining a long-term horizon in making investment decisions and efficient and effective management of plan assets.

As part of the investment strategy discussed above, CenterPoint Energy maintained the following weighted average allocation targets for its pension plans as of December 31, 2018:

U.S. equity	12 - 28%
International developed market equity	7 - 17%
Emerging market equity	5 - 11%
Fixed income	55 - 65%
Cash	0 - 2%

The following tables set forth by level, within the fair value hierarchy (see Note 10), CenterPoint Energy’s pension plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018										2017
	(Level 1)			(Level 2)		(Level 3)		Total			(Level 1)			(Level 2)		(Level 3)		Total
	(in millions)
Cash	$	19		$	—	$	—	$	19		$	18		$	—	$	—	$	18
Corporate bonds:
Investment grade or above	—			368		—		368			—			432		—		432
Equity securities:
U.S. companies	60			—		—		60			76			—		—		76
Cash received as collateral from securities lending	77			—		—		77			76			—		—		76
U.S. treasuries	196			—		—		196			67			—		—		67
Mortgage backed securities	—			6		—		6			—			8		—		8
Asset backed securities	—			1		—		1			—			1		—		1
Municipal bonds	—			27		—		27			—			47		—		47
Mutual funds (2)	167			—		—		167			211			—		—		211
International government bonds	—			16		—		16			—			17		—		17
Obligation to return cash received as collateral from securities lending	(77		)	—		—		(77		)	(76		)	—		—		(76		)
Total investments at fair value	$	442		$	418	$	—	860			$	372		$	505	$	—	877
Investments measured by net asset value per share or its equivalent (1) (2)								656										924
Total Investments								$	1,516									$	1,801

(1) Represents investments in common collective trust funds.

(2) The amounts invested in mutual funds and common collective trust funds were allocated as follows:

	As of December 31,
	2018				2017
	Mutual Funds		Common Collective Trust Funds		Mutual Funds		Common Collective Trust Funds
International equities	51	%	37	%	57	%	34	%
Emerging market equities	34	%	4	%	30	%	5	%
U.S. equities	15	%	5	%	13	%	6	%
Fixed income	—		54	%	—		55	%

The pension plan utilized both exchange traded and over-the-counter financial instruments such as futures, interest rate options and swaps that were marked to market daily with the gains/losses settled in the cash accounts. The pension plan did not include any holdings of CenterPoint Energy Common Stock as of December 31, 2018 or 2017.

(f) Postretirement Plan Assets

In managing the investments associated with the postretirement plans, the Registrants’ objective is to achieve and maintain a fully funded plan.  This objective is expected to be achieved through an investment strategy that manages liquidity requirements while maintaining a long-term horizon in making investment decisions and efficient and effective management of plan assets.

As part of the investment strategy discussed above, the Registrants maintained the following weighted average allocation targets for the postretirement plans as of December 31, 2018:

	CenterPoint Energy	Houston Electric	CERC
U.S. equity	13 - 23%	13 - 23%	15 - 25%
International developed market equity	3 - 13%	3 - 13%	2 - 12%
Fixed income	69 - 79%	69 - 79%	68 - 78%
Cash	0 - 2%	0 - 2%	0 - 2%

The following table presents mutual funds by level, within the fair value hierarchy, the Registrants’ postretirement plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018								2017
	Mutual Funds
	(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)		Total
	(in millions)
CenterPoint Energy	$	114	$	—	$	—	$	114	$	120	$	—	$	—	$	120
Houston Electric	89		—		—		89		93		—		—		93
CERC	25		—		—		25		26		—		—		26

The amounts invested in mutual funds were allocated as follows:

	As of December 31,
	2018						2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Fixed income	74	%	74	%	73	%	74	%	74	%	71	%
U.S. equities	19	%	19	%	21	%	18	%	18	%	21	%
International equities	7	%	7	%	6	%	8	%	8	%	8	%

(g) Benefit Plan Contributions

The Registrants made the following contributions in 2018 and expect to make the following minimum contributions in 2019 to the indicated benefit plans below:

	Contributions in 2018						Expected Minimum Contributions in 2019
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Qualified pension plan	$	60	$	—	$	—	$	86	$	—	$	—
Non-qualified pension plan	9		—		—		7		—		—
Postretirement benefit plan	14		9		4		17		10		4

The following benefit payments are expected to be paid by the pension and postretirement benefit plans:

	Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	141	$	16	$	9	$	5
2020	146		19		10		6
2021	154		20		11		6
2022	155		21		11		7
2023	156		22		12		7
2024-2028	759		116		61		37

(h) Savings Plan

The Registrants participate in CenterPoint Energy’s tax-qualified employee savings plan that includes a cash or deferred arrangement under Section 401(k) of the Internal Revenue Code of 1986, as amended (the Code), and an employee stock ownership plan under Section 4975(e)(7) of the Code. Under the plan, participating employees may make pre-tax or Roth contributions up to 50%, and after tax contributions up to 16%, of their eligible compensation, not to exceed certain federally mandated limits. The Registrants match 100% of the first 6% of each employee’s compensation contributed. The matching contributions are fully vested at all times.

Effective January 1, 2016, the savings plan was amended to limit the percentage of future contributions that could be invested in Common Stock to 25% and to prohibit transfers of account balances where the transfer would result in more than 25% of a participant’s total account balance invested in Common Stock.

The savings plan has significant holdings of Common Stock. As of December 31, 2018, 12,062,915 shares of Common Stock were held by the savings plan, which represented approximately 16% of its investments. Given the concentration of the investments in Common Stock, the savings plan and its participants have market risk related to this investment.

CenterPoint Energy allocates to Houston Electric and CERC the savings plan benefit expense related to their respective employees. The following table summarizes the Registrants’ savings plan benefit expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Savings plan benefit  expenses	$	43	$	17	$	18	$	41	$	17	$	17	$	38	$	15	$	16

(i) Other Benefits Plans

The Registrants participate in CenterPoint Energy’s plan that provides postemployment benefits for certain former or inactive employees, their beneficiaries and covered dependents, after employment but before retirement (primarily healthcare and life insurance benefits for participants in the long-term disability plan).

The Registrants participate in CenterPoint Energy’s non-qualified deferred compensation plans that provide benefits payable to directors, officers and select employees or their designated beneficiaries at specified future dates or upon termination, retirement or death. Benefit payments are made from the general assets of the Registrants.

Expenses related to other benefit plans were recorded as follows:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	3	$	4	$	1	$	6	$	1	$	4	$	5	$	3	$	3
Deferred compensation plans	3		1		—		3		1		—		3		1		—

Amounts related to other benefit plans were included in Benefit Obligations in the Registrants’ accompanying Consolidated Balance Sheets as follows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	11	$	3	$	7	$	20	$	3	$	14
Deferred compensation plans	42		9		3		45		10		3
Split-dollar life insurance arrangements	36		1		—		39		1		—

(j) Change in Control Agreements and Other Employee Matters

CenterPoint Energy has a change in control plan, which was amended and restated on May 1, 2017.  The plan generally provides, to the extent applicable, in the case of a change in control of CenterPoint Energy and covered termination of employment, for severance benefits of up to three times annual base salary plus bonus, and other benefits.  CenterPoint Energy officers, including the Executive Chairman, are participants under the plan.

As of December 31, 2018, the Registrants’ employees were covered by collective bargaining agreements as follows:

		Percentage of Employees Covered
	Agreement Expiration	CenterPoint Energy		Houston Electric		CERC
IBEW Local 66	May 2020	18	%	51	%	—
OPEIU Local 12 and Mankato	March and May 2021	3	%	—		3	%
Gas Workers Union Local 340	April 2020	6	%	—		12	%
IBEW Local 949	December 2020	3	%	—		7	%
USW Locals 13-227 and 13-1	June and July 2022	5	%	—		11	%
Total		35	%	51	%	33	%

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Derivative Instruments

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments [Text Block]

Derivative Instruments

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business.  The Registrants utilize derivative instruments such as physical forward contracts, swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows.

(a) Non-Trading Activities

Commodity Derivative Instruments. CenterPoint Energy and CERC, through CES, enter into certain derivative instruments to mitigate the effects of commodity price movements. Certain financial instruments used to hedge portions of the natural gas inventory of the Energy Services reportable segment are designated as fair value hedges for accounting purposes. All other financial instruments do not qualify or are not designated as cash flow or fair value hedges.

Weather Hedges. CenterPoint Energy and CERC have weather normalization or other rate mechanisms that mitigate the impact of weather on NGD in Arkansas, Louisiana, Mississippi, Minnesota and Oklahoma. CenterPoint Energy’s and CERC’s NGD and CenterPoint Energy’s electric operations in Texas do not have such mechanisms, although fixed customer charges are historically higher in Texas for NGD compared to its other jurisdictions. As a result, fluctuations from normal weather may have a positive or negative effect on CenterPoint Energy’s and CERC’s NGD’s results in Texas and on CenterPoint Energy’s electric operations’ results in its service territory.

CenterPoint Energy and CERC, as applicable, enter into winter season weather hedges from time to time for certain NGD jurisdictions and electric operations’ service territory to mitigate the effect of fluctuations from normal weather on results of operations and cash flows. These weather hedges are based on heating degree days at 10-year normal weather. Houston Electric does not enter into weather hedges.

The table below summarizes CenterPoint Energy’s and CERC’s weather hedge gain (loss) activity:

				Year Ended December 31,
Jurisdiction	Winter Season	Bilateral Cap		2018			2017			2016
		(in millions)
Certain NGD jurisdictions	2018 – 2019	$	9	$	—		$	—		$	—
Certain NGD jurisdictions	2017 – 2018	8		(2		)	—			—
Total CERC (1)				(2		)	—			—
Electric operations’ Texas service territory	2018 – 2019	8		—			—			—
Electric operations’ Texas service territory	2017 – 2018	9		(2		)	—			—
Electric operations’ Texas service territory	2016 – 2017	9		—			(1		)	1
Total CenterPoint Energy (1)				$	(4	)	$	(1	)	$	1

(1) Weather hedge gains (losses) are recorded in Revenues in the Statements of Consolidated Income.

Cash Flow Hedging of Interest Expense. From time to time, the Registrants enter into forward interest rate agreements with certain counterparties designated as cash flow hedges. The objective of these cash flow hedges is to reduce exposure to variability in cash flows related to interest payments on anticipated future fixed rate debt offerings or other exposure to variable rate debt. As of December 31, 2018 and 2017, the total outstanding notional amount of CenterPoint Energy’s and Houston Electric’s forward interest rate agreements related to cash flow hedges was $450 million and $-0-, respectively. The maximum length of time over which CenterPoint Energy and Houston Electric are exposed to the variability in future cash flows of the forecasted debt offerings is less than 12 months. For the impacts of cash flow hedges to accumulated other comprehensive income, see Note 13.

Economic Hedging of Interest Rate Risk. From time to time, the Registrants may enter into forward interest rate agreements with certain counterparties designated as economic hedges. The objective of these economic hedges is to offset any interest rate risk borne by one or more of the Registrants in connection with an anticipated future fixed rate debt offering or other exposure to variable rate debt. As of December 31, 2018 and 2017, the Registrants did not have any outstanding forward interest rate agreements related to economic hedges.

(b) Derivative Fair Values and Income Statement Impacts

The following tables present information about derivative instruments and hedging activities. The first three tables provide a balance sheet overview of Derivative Assets and Liabilities as of December 31, 2018 and 2017, while the last three tables provide a breakdown of the related income statement impacts for the years ending December 31, 2018, 2017 and 2016.

Fair Value of Derivative Instruments
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Derivative Assets Fair Value		Derivative Liabilities Fair Value		Derivative Assets Fair Value		Derivative Liabilities Fair Value
		(in millions)
Derivatives designated as cash flow hedges:
Interest rate derivatives	Current Liabilities: Non-trading derivative liabilities	$	—	$	24	$	—	$	—
	Total Houston Electric	—		24		—		—
Derivatives designated as fair value hedges:
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	1		7		13		1
Derivatives not designated as hedging instruments:
Natural gas derivatives (1) (2) (3)	Current Assets: Non-trading derivative assets	103		3		114		4
Natural gas derivatives (1) (2) (3)	Other Assets: Non-trading derivative assets	38		—		44		—
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	62		173		38		78
Natural gas derivatives (1) (2) (3)	Other Liabilities: Non-trading derivative liabilities	16		25		9		24
	Total CERC	220		208		218		107
Indexed debt securities derivative	Current Liabilities	—		601		—		668
	Total CenterPoint Energy	$	220	$	833	$	218	$	775

(1) The fair value shown for natural gas contracts is comprised of derivative gross volumes totaling 1,674 Bcf or a net 140 Bcf long position and 1,795 Bcf or a net 224 Bcf long position as of December 31, 2018 and 2017, respectively.  Certain natural gas contracts hedge basis risk only and lack a fixed price exposure.

(2) Natural gas contracts are presented on a net basis in the Consolidated Balance Sheets as they are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due and causes derivative assets (liabilities) to be ultimately presented net in a liability (asset) account within the Consolidated Balance Sheets. The net of total non-trading natural gas derivative assets and liabilities is detailed in the Offsetting of Natural Gas Derivative Assets and Liabilities table below.

(3) Derivative Assets and Derivative Liabilities include no material amounts related to physical forward transactions with Enable.

Cumulative Basis Adjustment for Fair Value Hedges (CenterPoint Energy and CERC)
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item
		(in millions)
Hedged items in fair value hedge relationship:
Natural gas inventory	Current Assets: Natural gas inventory	$	57	$	1	$	80	$	14
Total CenterPoint Energy and CERC		$	57	$	1	$	80	$	14

Offsetting of Natural Gas Derivative Assets and Liabilities (CenterPoint Energy and CERC)
	December 31, 2018									December 31, 2017
	Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)			Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)
	(in millions)
Current Assets: Non-trading derivative assets	$	166		$	(66	)	$	100		$	165		$	(55	)	$	110
Other Assets: Non-trading derivative assets	54			(16		)	38			53			(9		)	44
Current Liabilities: Non-trading derivative liabilities	(183		)	81			(102		)	(83		)	63			(20		)
Other Liabilities: Non-trading derivative liabilities	(25		)	20			(5		)	(24		)	20			(4		)
Total	$	12		$	19		$	31		$	111		$	19		$	130

(1) Gross amounts recognized include some derivative assets and liabilities that are not subject to master netting arrangements.

(2) The derivative assets and liabilities on the Consolidated Balance Sheets exclude accounts receivable or accounts payable that, should they exist, could be used as offsets to these balances in the event of a default.

Income Statement Impact of Hedge Accounting Activity (CenterPoint Energy and CERC)

	Year Ended December 31,
	2018			2017			2016
	Location and Amount of Gain (Loss) recognized in Income on Hedging Relationship (2)
	Non-utility natural gas expense
	(in millions)
Total amounts presented in the statements of income in which the effects of hedges are recorded	$	4,364		$	3,785		$	1,983
Gain (loss) on fair value hedging relationships:
Commodity contracts:
Hedged items - Natural gas inventory	(13		)	14			—
Derivatives designated as hedging instruments	13			(14		)	—
Amounts excluded from effectiveness testing recognized in earnings immediately (1)	(149		)	(67		)	70

(1) Upon adoption of ASU 2017-12 effective January 1, 2018 (see Note 2 for additional information), CenterPoint Energy and CERC elected to exclude from their assessment of hedge effectiveness the natural gas market price difference between locations of the hedged inventory and the delivery location specified in the hedge instruments. Prior to the adoption of this accounting guidance, the timing difference between the spot price and the futures price, as well as the difference between the timing of the settlement of the futures and the valuation of the underlying physical commodity, was excluded from the assessment of effectiveness for CenterPoint Energy’s and CERC’s existing fair value hedges and will continue to be excluded from the assessment of hedge effectiveness. CenterPoint Energy and CERC elected to continue to immediately recognize amounts excluded from hedge effectiveness in their respective Statements of Consolidated Income.

(2) Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for the Registrants for the years ended December 31, 2018, 2017 and 2016, respectively.

		Year Ended December 31,
	Income Statement Location	2018			2017		2016
		(in millions)
Effects of derivatives not designated as hedging instruments on the income statement:
Commodity contracts	Gains (Losses) in Non-utility revenues	$	107		$	211	$	(18	)
Total CERC		107			211		(18		)
Indexed debt securities derivative	Gains (Losses) in Other Income (Expense)	(232		)	49		(413		)
Interest rate derivatives	Gains in Other Income (Expense)	2			—		—
Total CenterPoint Energy		$	(123	)	$	260	$	(431	)

(c) Credit Risk Contingent Features

CenterPoint Energy and CERC enter into financial derivative contracts containing material adverse change provisions. These provisions could require CenterPoint Energy or CERC to post additional collateral if the S&P or Moody’s credit ratings of CenterPoint Energy, Inc. or its subsidiaries, including CERC Corp., are downgraded.  

CenterPoint Energy and CERC

	December 31, 2018		December 31, 2017
	(in millions)
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position	$	1	$	2
Fair value of collateral already posted	—		—
Additional collateral required to be posted if credit risk contingent features triggered	—		2

(d) Credit Quality of Counterparties

In addition to the risk associated with price movements, credit risk is also inherent in CenterPoint Energy’s and CERC’s non-trading derivative activities. Credit risk relates to the risk of loss resulting from non-performance of contractual obligations by a counterparty. The following table shows the composition of counterparties to the non-trading derivative assets:

CenterPoint Energy and CERC
	December 31, 2018				December 31, 2017
	Investment Grade (1)		Total (3)		Investment Grade (1)		Total (3)
	(in millions)
Energy marketers	$	11	$	24	$	6	$	45
End users (2)	30		114		17		109
Total	$	41	$	138	$	23	$	154

(1) “Investment grade” is primarily determined using publicly available credit ratings and considers credit support (including parent company guarantees) and collateral (including cash and standby letters of credit). For unrated counterparties, CenterPoint Energy and CERC determine a synthetic credit rating by performing financial statement analysis and consider contractual rights and restrictions and collateral.

(2) End users are comprised primarily of customers who have contracted to fix the price of a portion of their physical gas requirements for future periods.

(3) The amounts reflected in the table above were not impacted by collateral netting.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements [Text Block]

Fair Value Measurements

Assets and liabilities that are recorded at fair value in the Registrants’ Consolidated Balance Sheets are categorized based upon the level of judgment associated with the inputs used to measure their value. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities, are as follows:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. The types of assets carried at Level 1 fair value generally are exchange-traded derivatives and equity securities, as well as natural gas inventory that has been designated as the hedged item in a fair value hedge.

Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets, and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets.  A market approach is utilized to value the Registrants’ Level 2 natural gas derivative assets or liabilities. CenterPoint Energy’s Level 2 indexed debt securities derivative is valued using an option model and a discounted cash flow model, which uses projected dividends on the ZENS-Related Securities and a discount rate as observable inputs.

Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Registrants’ judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Registrants develop these inputs based on the best information available, including the Registrants’ own data. A market approach is utilized to value the Registrants’ Level 3 assets or liabilities. As of December 31, 2018, CenterPoint Energy’s and CERC’s Level 3 assets and liabilities are comprised of physical natural gas forward contracts and options. Level 3 physical natural gas forward contracts and options are valued using a discounted cash flow model which includes illiquid forward price curve locations (ranging from $1.39 to $5.96 per MMBtu) as an unobservable input. CenterPoint Energy’s and CERC’s Level 3 physical natural gas forward contracts and options derivative assets and liabilities consist of both long and short positions (forwards and options). Forward price decreases (increases) as of December 31, 2018 would have resulted in lower (higher) values, respectively, for long forwards and options and higher (lower) values, respectively, for short forwards and options.

The Registrants determine the appropriate level for each financial asset and liability on a quarterly basis and recognize transfers between levels at the end of the reporting period.  

The following tables present information about the Registrants’ assets and liabilities (including derivatives that are presented net) measured at fair value on a recurring basis as of December 31, 2018 and December 31, 2017, and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value.

CenterPoint Energy

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	542	$	—	$	—	$	—		$	542	$	963	$	—	$	—	$	—		$	963
Investments, including money market funds (2)	66		—		—		—			66		68		—		—		—			68
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	609	$	173	$	47	$	(82	)	$	747	$	1,045	$	161	$	57	$	(64	)	$	1,199
Liabilities
Indexed debt securities derivative	$	—	$	601	$	—	$	—		$	601	$	—	$	—	$	668	$	—		$	668
Interest rate derivatives	24		—		—		—			24		—		—		—		—			—
Natural gas derivatives (3)(4)	—		191		17		(101		)	107		—		96		11		(83		)	24
Total liabilities	$	24	$	792	$	17	$	(101	)	$	732	$	—	$	96	$	679	$	(83	)	$	692

Houston Electric

	December 31, 2018										December 31, 2017
	Level 1		Level 2		Level 3		Netting		Total		Level 1		Level 2		Level 3		Netting		Total
Assets	(in millions)
Investments, including money market funds (2)	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Total assets	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Liabilities
Interest rate derivatives	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—
Total liabilities	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—

CERC

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	2	$	—	$	—	$	—		$	2	$	3	$	—	$	—	$	—		$	3
Investments, including money market funds (2)	11		—		—		—			11		11		—		—		—			11
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	14	$	173	$	47	$	(82	)	$	152	$	28	$	161	$	57	$	(64	)	$	182
Liabilities
Natural gas derivatives (3)(4)	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24
Total liabilities	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24

(1) Amounts represent the impact of legally enforceable master netting arrangements that allow CenterPoint Energy and CERC to settle positive and negative positions and also include cash collateral of $19 million as of both December 31, 2018 and 2017, respectively, posted with the same counterparties.

(2) Amounts are included in Prepaid and Other Current Assets and Other Assets in the Consolidated Balance Sheets.

(3) Natural gas derivatives include no material amounts related to physical forward transactions with Enable.

(4) Level 1 natural gas derivatives include exchange-traded derivatives cleared by the CME, which deems that financial instruments cleared by the CME are settled daily in connection with posted cash payments. As a result of this exchange rule, CME-related derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are presented in Level 1 net of posted cash; however, the derivatives remain outstanding and subject to future commodity price fluctuations until they are settled in accordance with their contractual terms. Derivative transactions cleared on exchanges other than the CME (e.g., the Intercontinental Exchange or ICE) continue to be reported on a gross basis.

The following table presents additional information about assets or liabilities, including derivatives that are measured at fair value on a recurring basis for which CenterPoint Energy and CERC have utilized Level 3 inputs to determine fair value:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy			CERC			CenterPoint Energy			CERC			CenterPoint Energy			CERC
	(in millions)
Beginning balance	$	(622	)	$	46		$	(704	)	$	13		$	12		$	12
Purchases (1)	—			—			—			—			12			12
Total gains (losses)	30			30			96			47			12			12
Total settlements	(39		)	(39		)	(11		)	(11		)	(27		)	(27		)
Transfers into Level 3 (2)	5			5			14			14			(712		)	5
Transfers out of Level 3 (3)	656			(12		)	(17		)	(17		)	(1		)	(1		)
Ending balance (4)	$	30		$	30		$	(622	)	$	46		$	(704	)	$	13
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date:
	$	18		$	18		$	87		$	38		$	(402	)	$	11

(1) Mark-to-market value of Level 3 derivative assets acquired through the purchase of AEM were less than $1 million at the acquisition date.

(2) During 2016, CenterPoint Energy transferred its indexed debt securities from Level 2 to Level 3 to reflect changes in the significance of the unobservable inputs used in the valuation.

(3) During 2018, CenterPoint Energy transferred its indexed debt securities derivative from Level 3 to Level 2 to reflect changes in the significance of the unobservable inputs used in the valuation.

(4) CenterPoint Energy and CERC did not have significant Level 3 sales during any of the years ended December 31, 2018, 2017 or 2016.

Items Measured at Fair Value on a Nonrecurring Basis

As of December 31, 2018 and 2017, there were no significant assets or liabilities measured at fair value on a nonrecurring basis.

Estimated Fair Value of Financial Instruments

The fair values of cash and cash equivalents, investments in debt and equity securities classified as “trading” and short-term borrowings are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below.  The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy.

	December 31, 2018						December 31, 2017
	CenterPoint Energy (1)		Houston Electric (1)		CERC		CenterPoint Energy (1)		Houston Electric (1)		CERC
Long-term debt, including current maturities	(in millions)
Carrying amount	$	9,140	$	4,717	$	2,371	$	8,679	$	4,753	$	2,457
Fair value	9,308		4,770		2,488		9,220		5,034		2,708

(1) Includes Securitization Bond debt.

XML

Unconsolidated Affiliate (CenterPoint Energy and CERC)

12 Months Ended

Dec. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Unconsolidated Affiliate (CenterPoint Energy and CERC) [Text Block]

Unconsolidated Affiliate (CenterPoint Energy and CERC)

CenterPoint Energy has the ability to significantly influence the operating and financial policies of Enable, a publicly traded MLP, and, accordingly, accounts for its investment in Enable’s common units using the equity method of accounting. Upon the adoption of ASU 2014-09 and ASU 2017-05 on January 1, 2018, CenterPoint Energy and CERC evaluated transactions in the investment in Enable that occurred prior to January 1, 2018 (the effective date) and concluded a cumulative effect adjustment to the opening balance of retained earnings was not required. See Note 2(r) for further discussion.

Enable is considered to be a VIE because the power to direct the activities that most significantly impact Enable’s economic performance does not reside with the holders of equity investment at risk. However, CenterPoint Energy is not considered the primary beneficiary of Enable since it does not have the power to direct the activities of Enable that are considered most significant to the economic performance of Enable. As of December 31, 2018, CenterPoint Energy’s maximum exposure to loss related to Enable is limited to the equity investment, its investment in Enable Series A Preferred Units and outstanding current accounts receivable from Enable.

On September 4, 2018, CERC entered into a Contribution Agreement, by and between CERC and CNP Midstream, a new subsidiary formed by CERC in June 2018, pursuant to which CERC contributed its equity investment in Enable consisting of Enable common units and its interests in Enable GP, to CNP Midstream (collectively, the Enable Contribution). Immediately following the Enable Contribution, CERC distributed all of its interest in CNP Midstream to Utility Holding, CERC’s sole stockholder and a wholly-owned subsidiary of CenterPoint Energy. Utility Holding then distributed all of its interest in CNP Midstream to CenterPoint Energy, its sole member (collectively with the Enable Contribution, the Internal Spin). CERC executed the Internal Spin to, among other things, enhance the access of CERC and CenterPoint Energy to low cost debt and equity through increased transparency and understandability of the financial statements, improve CERC’s credit quality by eliminating the exposure to Enable’s midstream business and provide clarity of internal reporting and performance metrics to enhance management’s decision making for CERC and CNP Midstream.

The Internal Spin has been accounted for under the guidance for transactions between entities under common control. As of September 4, 2018, CERC derecognized its investment in Enable at carrying value on the date of distribution of $2.4 billion, net of deferred income taxes of $974 million, and CNP Midstream recorded the net asset contribution from CERC at CERC’s carrying value. Neither CERC nor CNP Midstream recognized a gain or loss upon the distribution or contribution, respectively, of net assets involved in the Internal Spin. In connection with the Internal Spin, CenterPoint Energy, through Utility Holding, made a $600 million capital contribution to CERC, which was used by CERC to repay outstanding indebtedness that historically supported CERC’s legacy midstream assets. See Note 21 for further discussion.

As a result of the Internal Spin, CERC’s equity in earnings in Enable and related income taxes have been classified as discontinued operations in CERC’s Consolidated Financial Statements as detailed below.

Limited Partner Interest and Units Held in Enable (CenterPoint Energy and CERC):

	As of December 31,
	2018				2017
	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)
CenterPoint Energy (3)	54.0	%	233,856,623	14,520,000	54.1	%	233,856,623	14,520,000
OGE	25.6	%	110,982,805	—	25.7	%	110,982,805	—
Public unitholders	20.4	%	88,392,983	—	20.2	%	87,744,652	—

(1) Excludes the Enable Series A Preferred Units owned by CenterPoint Energy.

(2) The carrying amount of the Enable Series A Preferred Units, reflected as Preferred units - unconsolidated affiliate on CenterPoint Energy’s Consolidated Balance Sheets, was $363 million as of both December 31, 2018 and 2017. No impairment charges or adjustment to carrying value were made as no observable price changes were identified in the current or prior reporting periods. See Note 2(r) for further discussion.

(3) Prior to the Internal Spin on September 4, 2018 described above, CenterPoint Energy’s investment in Enable’s common units, excluding the Enable Series A Preferred Units held directly by CenterPoint Energy, was held indirectly through CERC.

Generally, sales to any person or entity (including a series of sales to the same person or entity) of more than 5% of the aggregate of the common units CenterPoint Energy owns in Enable or sales to any person or entity (including a series of sales to the same person or entity) by OGE of more than 5% of the aggregate of the common units it owns in Enable are subject to mutual rights of first offer and first refusal set forth in Enable’s Agreement of Limited Partnership.

Interests Held in Enable GP (CenterPoint Energy and CERC):

CenterPoint Energy and OGE held the following interests in Enable GP as of both December 31, 2018 and 2017:

	Management  Rights (1)		Incentive Distribution Rights (2)
CenterPoint Energy (3)	50	%	40	%
OGE	50	%	60	%

(1) As of December 31, 2018, Enable is controlled jointly by CenterPoint Energy and OGE. Sale of CenterPoint Energy’s or OGE’s ownership interests in Enable GP to a third party is subject to mutual rights of first offer and first refusal, and CenterPoint Energy is not permitted to dispose of less than all of its interest in Enable GP.

(2) Enable is expected to pay a minimum quarterly distribution of $0.2875 per common unit on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates, within 60 days after the end of each quarter. If cash distributions to Enable’s unitholders exceed $0.330625 per common unit in any quarter, Enable GP will receive increasing percentages or incentive distributions rights, up to 50%, of the cash Enable distributes in excess of that amount. In certain circumstances Enable GP will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. To date, no incentive distributions have been made.

(3) CenterPoint Energy held the management rights and incentive distributions rights in Enable GP indirectly through CERC until the Internal Spin on September 4, 2018 described above.

Distributions Received from Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018				2017				2016
	Per Unit		Cash Distribution		Per Unit		Cash Distribution		Per Unit		Cash Distribution
	(in millions, except per unit amounts)
Enable common units (1)	$	0.9540	$	223	$	1.2720	$	297	$	1.2720	$	297
Total CERC			223				297				297
Enable common units (1)	0.3180		74		—		—		—		—
Enable Series A Preferred Units (2)	2.5000		36		2.5000		36		1.5417		22
Total CenterPoint Energy			$	333			$	333			$	319

(1) Reflects CERC’s ownership of Enable common units up to September 4, 2018 when CERC completed the Internal Spin. After such date, distributions from Enable were received directly by CenterPoint Energy.

(2) 2016 amounts represent the period from February 18, 2016 to December 31, 2016.

Transactions with Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018		2017		2016
CenterPoint Energy and CERC	(in millions)
Natural gas expenses, including transportation and storage costs	$	122	$	115	$	110
CenterPoint Energy
Reimbursement of transition services (1)	4		4		7

(1) Represents amounts billed under the Transition Agreements for certain support services provided to Enable. Actual transition services costs are recorded net of reimbursement.

	December 31,
	2018		2017
CenterPoint Energy and CERC	(in millions)
Accounts payable for natural gas purchases from Enable	$	11	$	13
CenterPoint Energy
Accounts receivable for amounts billed for transition services	2		1

CERC’s continuing involvement with Enable subsequent to the Internal Spin is limited to its natural gas purchases from Enable.

Summarized consolidated income (loss) information for Enable is as follows:

	Year Ended December 31,
	2018			2017		2016
	(in millions)
Operating revenues	$	3,431		$	2,803	$	2,272
Cost of sales, excluding depreciation and amortization	1,819			1,381		1,017
Depreciation and amortization	398			366		338
Operating income	648			528		385
Net income attributable to Enable common units	485			400		290
Reconciliation of Equity in Earnings (Losses), net:
CenterPoint Energy’s interest	$	262		$	216	$	160
Basis difference amortization (1)	47			49		48
Loss on dilution, net of proportional basis difference recognition	(2		)	—		—
CenterPoint Energy’s equity in earnings, net	$	307		$	265	$	208

(1) Equity in earnings of unconsolidated affiliate includes CenterPoint Energy’s share of Enable earnings adjusted for the amortization of the basis difference of CenterPoint Energy’s original investment in Enable and its underlying equity in net assets of Enable. The basis difference is being amortized over approximately 30 years, the remaining average life of the assets to which the basis difference is attributed.

Summarized consolidated balance sheet information for Enable is as follows:

	December 31,
	2018			2017
	(in millions)
Current assets	$	449		$	416
Non-current assets	11,995			11,177
Current liabilities	1,615			1,279
Non-current liabilities	3,211			2,660
Non-controlling interest	38			12
Preferred equity	362			362
Enable partners’ equity	7,218			7,280
Reconciliation of Investment in Enable:
CenterPoint Energy’s ownership interest in Enable partners’ equity	$	3,896		$	3,935
CenterPoint Energy’s basis difference	(1,414		)	(1,463		)
CenterPoint Energy’s equity method investment in Enable	$	2,482		$	2,472

Discontinued Operations (CERC):

The Internal Spin represents a significant strategic shift that has a material effect on CERC’s operations and financial results and, as a result, CERC’s distribution of its equity investment in Enable met the criteria for discontinued operations classification. CERC has no continuing involvement in the equity investment of Enable. Therefore, CERC’s equity in earnings and related income taxes have been classified as Income from discontinued operations, net of tax, in CERC’s Statements of Consolidated Income for the periods presented. CERC’s equity method investment and related deferred income tax liabilities have been classified as Investment in unconsolidated affiliate - discontinued operations and Deferred income taxes, net - discontinued operations, respectively, in CERC’s Consolidated Balance Sheets for the periods presented. The following table presents amounts included in Income from discontinued operations, net of tax in CERC’s Statements of Consolidated Income.

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Equity in earnings of unconsolidated affiliate, net	$	184	$	265	$	208
Income tax expense	46		104		81
Income from discontinued operations, net of tax	$	138	$	161	$	127

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Indexed Debt Securities (ZENS) and Securities Related to ZENS (CenterPoint Energy)

12 Months Ended

Dec. 31, 2018

Indexed Debt Securities [Abstract]

Indexed Debt Securities (ZENS) and Securities Related to ZENS (CenterPoint Energy) [Text Block]

Indexed Debt Securities (ZENS) and Securities Related to ZENS(CenterPoint Energy)

(a) Investment in Securities Related to ZENS

In 1995, CenterPoint Energy sold a cable television subsidiary to TW and received certain ZENS-Related Securities as partial consideration. A subsidiary of CenterPoint Energy holds shares of certain securities detailed in the table below, which are classified as trading securities and are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. Unrealized gains and losses resulting from changes in the market value of the ZENS-Related Securities are recorded in CenterPoint Energy’s Statements of Consolidated Income.

	Shares Held at December 31,
	2018	2017
AT&T Common	10,212,945	—
Charter Common	872,912	872,503
Time Common	—	888,392
TW Common	—	7,107,130

(b) ZENS

In September 1999, CenterPoint Energy issued ZENS having an original principal amount of $1 billion of which $828 million remained outstanding as of December 31, 2018. Each ZENS was originally exchangeable at the holder’s option at any time for an amount of cash equal to 95% of the market value of the reference shares of TW Common attributable to such note. The number and identity of the reference shares attributable to each ZENS are adjusted for certain corporate events.

On October 22, 2016, AT&T announced that it had entered into a definitive agreement to acquire TW in a stock and cash transaction. On February 15, 2017, TW shareholders approved the announced transaction with AT&T. The merger closed on June 14, 2018. CenterPoint Energy received $53.75 and 1.437 shares of AT&T Common for each share of TW Common held, resulting in cash proceeds of $382 million and 10,212,945 shares of AT&T Common. In accordance with the terms of the ZENS, CenterPoint Energy remitted $382 million to ZENS note holders in July 2018, which reduced the ZENS contingent principal amount. 

On November 26, 2017, Meredith announced that it had entered into a definitive merger agreement with Time. Pursuant to the merger agreement, upon closing of the merger, a subsidiary of Meredith would purchase for cash all outstanding Time Common shares for $18.50 per share. The transaction was consummated on January 31, 2018. CenterPoint Energy elected to make a reference share offer adjustment and distribute additional interest, if any, in accordance with the terms of its ZENS rather than electing to increase the early exchange ratio to 100%. CenterPoint Energy’s distribution of additional interest in connection with the reference share offer was proportionate to the percentage of eligible shares that were validly tendered by Time stockholders in Meredith’s tender offer. CenterPoint Energy received $18.50 for each share of Time Common held, resulting in cash proceeds of approximately $16 million. In accordance with the terms of the ZENS, CenterPoint Energy distributed additional interest of approximately $16 million to ZENS holders on March 6, 2018, which reduced the ZENS contingent principal amount.

As a result, CenterPoint Energy recorded the following during the year ended December 31, 2018 related to the events discussed above:

	Meredith/Time			AT&T/TW
	(in millions)
Cash payment to ZENS note holders	$	16		$	382
Indexed debt – reduction	(4		)	(95		)
Indexed debt securities derivative – reduction	(1		)	(45		)
Loss on indexed debt securities	$	11		$	242

CenterPoint Energy’s reference shares for each ZENS consisted of the following:

	December 31,
	2018	2017
	(in shares)
AT&T Common	0.7185	—
Charter Common	0.061382	0.061382
Time Common	—	0.0625
TW Common	—	0.5

CenterPoint Energy pays interest on the ZENS at an annual rate of 2% plus the amount of any quarterly cash dividends paid in respect of the reference shares attributable to the ZENS. The principal amount of ZENS is subject to being increased or decreased to the extent that the annual yield from interest and cash dividends on the reference shares is less than or more than 2.309%. The adjusted principal amount is defined in the ZENS instrument as “contingent principal.” At December 31, 2018, ZENS having an original principal amount of $828 million and a contingent principal amount of $93 million were outstanding and were exchangeable, at the option of the holders, for cash equal to 95% of the market value of reference shares deemed to be attributable to the ZENS. As of December 31, 2018, the market value of such shares was approximately $540 million, which would provide an exchange amount of $620 for each $1,000 original principal amount of ZENS. At maturity of the ZENS in 2029, CenterPoint Energy will be obligated to pay in cash the higher of the contingent principal amount of the ZENS or an amount based on the then-current market value of the reference shares, which will include any additional publicly-traded securities distributed with respect to the current reference shares prior to maturity.

The ZENS obligation is bifurcated into a debt component and a derivative component (the holder’s option to receive the appreciated value of the reference shares at maturity). The bifurcated debt component accretes through interest charges annually up to the contingent principal amount of the ZENS in 2029. Such accretion will be reduced by annual cash interest payments, as described above. The derivative component is recorded at fair value and changes in the fair value of the derivative component are recorded in CenterPoint Energy’s Statements of Consolidated Income. Changes in the fair value of the ZENS-Related Securities held by CenterPoint Energy are expected to substantially offset changes in the fair value of the derivative component of the ZENS.

The following table sets forth summarized financial information regarding CenterPoint Energy’s investment in ZENS-Related Securities and each component of CenterPoint Energy’s ZENS obligation. 

	ZENS-Related Securities			Debt Component of ZENS			Derivative Component of ZENS
	(in millions)
Balance as of December 31, 2015	$	805		$	145		$	442
Accretion of debt component of ZENS	—			26			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(178		)	—			—
Distribution to ZENS holders	—			(40		)	(21		)
Loss on indexed debt securities	—			—			296
Gain on ZENS-Related Securities	326			—			—
Balance as of December 31, 2016	953			114			717
Accretion of debt component of ZENS	—			27			—
2% interest paid	—			(17		)	—
Distribution to ZENS holders	—			(2		)	—
Gain on indexed debt securities	—			—			(49		)
Gain on ZENS-Related Securities	7			—			—
Balance as of December 31, 2017	960			122			668
Accretion of debt component of ZENS	—			21			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(398		)	—			—
Distribution to ZENS holders	—			(102		)	(46		)
Gain on indexed debt securities	—			—			(21		)
Loss on ZENS-Related Securities	(22		)	—			—
Balance as of December 31, 2018	$	540		$	24		$	601

XML

Equity (CenterPoint Energy)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Equity (CenterPoint Energy) [Text Block]

Equity(CenterPoint Energy)

Dividends Declared

CenterPoint Energy declared dividends on its Common Stock during 2018, 2017 and 2016 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
December 12, 2018	February 21, 2019	March 14, 2019	$	0.2875	$	144
October 23, 2018	November 15, 2018	December 13, 2018	0.2775		139
July 26, 2018	August 16, 2018	September 13, 2018	0.2775		120
April 26, 2018	May 17, 2018	June 14, 2018	0.2775		120
Total 2018			$	1.1200	$	523
December 13, 2017	February 15, 2018	March 8, 2018	$	0.2775	$	120
October 25, 2017	November 16, 2017	December 8, 2017	0.2675		116
July 27, 2017	August 16, 2017	September 8, 2017	0.2675		115
April 27, 2017	May 16, 2017	June 9, 2017	0.2675		115
January 5, 2017	February 16, 2017	March 10, 2017	0.2675		115
Total 2017			$	1.3475	$	581

Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
October 27, 2016	November 16, 2016	December 9, 2016	$	0.2575	$	111
July 28, 2016	August 16, 2016	September 9, 2016	0.2575		111
April 28, 2016	May 16, 2016	June 10, 2016	0.2575		111
January 20, 2016	February 16, 2016	March 10, 2016	0.2575		110
Total 2016			$	1.0300	$	443

CenterPoint Energy declared dividends on its Series A Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	32.1563	$	26
Total 2018			$	32.1563	$	26

CenterPoint Energy declared dividends on its Series B Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	17.5000	$	17
October 23, 2018	November 15, 2018	December 1, 2018	11.6667		11
Total 2018			$	29.1667	$	28

There were no Series A Preferred Stock or Series B Preferred Stock outstanding or dividends declared in 2017 and 2016.

Dividend Requirement on Preferred Stock

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Series A Preferred Stock	$	18	$	—	$	—
Series B Preferred Stock	17		—		—
Total preferred stock dividend requirement	$	35	$	—	$	—

Series A Preferred Stock

On August 22, 2018, CenterPoint Energy completed the issuance of 800,000 shares of its Series A Preferred Stock, at a price of $1,000 per share, resulting in net proceeds of $790 million after issuance costs. The aggregate liquidation value of the Series A Preferred Stock is $800 million with a per share liquidation value of $1,000.

CenterPoint Energy used the net proceeds from the Series A Preferred Stock offering to fund a portion of the Merger and to pay related fees and expenses.

Dividends. The Series A Preferred Stock accrue cumulative dividends, calculated as a percentage of the stated amount per share, at a fixed annual rate of 6.125% per annum to, but excluding, September 1, 2023, and at an annual rate of three-month LIBOR plus a spread of 3.270% thereafter to be paid in cash if, when and as declared. If declared, prior to September 1, 2023, dividends are payable semi-annually in arrears on each March 1 and September 1, beginning on March 1, 2019, and, for the period commencing on September 1, 2023, dividends are payable quarterly in arrears each March 1, June 1, September 1 and December 1, beginning on December 1, 2023. Cumulative dividends earned during the applicable periods are presented on CenterPoint Energy’s Statements of Consolidated Income as Preferred stock dividend requirement.

Optional Redemption. On or after September 1, 2023, CenterPoint Energy may, at its option, redeem the Series A Preferred Stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $1,000 per share, plus any accumulated and unpaid dividends thereon to, but excluding, the redemption date.

At any time within 120 days after the conclusion of any review or appeal process instituted by CenterPoint Energy, if any, following the occurrence of a ratings event, CenterPoint Energy may, at its option, redeem the Series A Preferred Stock in whole, but not in part, at a redemption price in cash per share equal to $1,020 (102% of the liquidation value of $1,000) plus an amount equal to all accumulated and unpaid dividends thereon to, but excluding, the redemption date, whether or not declared.

Ranking. The Series A Preferred Stock, with respect to anticipated dividends and distributions upon CenterPoint Energy’s liquidation or dissolution, or winding-up of CenterPoint Energy’s affairs, ranks or will rank:

• senior to Common Stock and to each other class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is expressly made subordinated to the Series A Preferred Stock;

• on a parity with any class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is not expressly made senior or subordinated to the Series A Preferred Stock, including the Series B Preferred Stock;

• junior to any class or series of capital stock established after the initial issue date of the Series A Preferred Stock that is expressly made senior to the Series A Preferred Stock;

• junior to all existing and future indebtedness (including indebtedness outstanding under CenterPoint Energy’s credit facilities, senior notes and commercial paper) and other liabilities with respect to assets available to satisfy claims against CenterPoint Energy; and

• structurally subordinated to any existing and future indebtedness and other liabilities of CenterPoint Energy’s subsidiaries and capital stock of CenterPoint Energy’s subsidiaries held by third parties.

Voting Rights. Holders of the Series A Preferred Stock generally will not have voting rights. Whenever dividends on shares of Series A Preferred Stock have not been declared and paid for the equivalent of three or more semi-annual or six or more quarterly dividend periods (including, for the avoidance of doubt, the dividend period beginning on, and including, the original issue date and ending on, but excluding, March 1, 2019), whether or not consecutive, the holders of such shares of Series A Preferred Stock, voting together as a single class with holders of any and all other series of voting preferred stock (as defined in the Statement of Resolution for the Series A Preferred Stock) then outstanding, will be entitled at CenterPoint Energy’s next annual or special meeting of shareholders to vote for the election of a total of two additional members of CenterPoint Energy’s Board of Directors, subject to certain limitations. This right will terminate if and when all accumulated dividends have been paid in full and, upon such termination, the term of office of each director so elected will terminate at such time and the number of directors on CenterPoint Energy’s Board of Directors will automatically decrease by two, subject to the revesting of such rights in the event of each subsequent nonpayment.

Series B Preferred Stock

On October 1, 2018, CenterPoint Energy completed the issuance of 19,550,000 depositary shares, each representing a 1/20th interest in a share of its Series B Preferred Stock, at a price of $50 per depositary share, resulting in net proceeds of $950 million after issuance costs. The aggregate liquidation value of Series B Preferred Stock is $978 million with a per share liquidation value of $1,000. The amount issued included 2,550,000 depositary shares issued pursuant to the exercise in full of the option granted to the underwriters to purchase additional depositary shares.

CenterPoint Energy used the net proceeds from the offering of depositary shares, each representing a 1/20th interest in a share of its Series B Preferred Stock, to fund a portion of the Merger and to pay related fees and expenses.

Dividends. Dividends on the Series B Preferred Stock will be payable on a cumulative basis when, as and if declared at an annual rate of 7.00% on the liquidation value of $1,000 per share. CenterPoint Energy may pay declared dividends in cash or, subject to certain limitations, in shares of Common Stock, or in any combination of cash and shares of Common Stock on March 1, June 1, September 1 and December 1 of each year, commencing on December 1, 2018 and ending on, and including, September 1, 2021. Cumulative dividends earned during the applicable periods are presented on CenterPoint Energy’s Statements of Consolidated Income as Preferred stock dividend requirement.

Mandatory Conversion. Unless earlier converted or redeemed, each share of the Series B Preferred Stock will automatically convert on the mandatory conversion date, which is expected to be September 1, 2021, into not less than 30.5820 and not more than 36.6980 shares of Common Stock, subject to certain anti-dilution adjustments. Correspondingly, the conversion rate per depositary share will be not less than 1.5291 and not more than 1.8349 shares of Common Stock, subject to certain anti-dilution adjustments. The conversion rate will be determined based on a preceding 20-day volume-weighted-average-price of Common Stock.

The following table illustrates the conversion rate per share of the Series B Preferred Stock, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Share of Series B Preferred Stock
Greater than $32.6990 (threshold appreciation price)	30.5820 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 30.5820 and 36.6980 shares of Common Stock, determined by dividing $1,000 by the applicable market value
Less than $27.2494 (initial price)	36.6980 shares of Common Stock

The following table illustrates the conversion rate per depositary share, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Depository Share
Greater than $32.6990 (threshold appreciation price)	1.5291 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 1.5291 and 1.8349 shares of Common Stock, determined by dividing $50 by the applicable market value
Less than $27.2494 (initial price)	1.8349 shares of Common Stock

Optional Conversion of the Holder. Other than during a fundamental change conversion period, and unless CenterPoint Energy has redeemed the Series B Preferred Stock, a holder of the Series B Preferred Stock may, at any time prior to September 1, 2021, elect to convert such holder’s shares of the Series B Preferred Stock, in whole or in part, at the minimum conversion rate of 30.5820 shares of Common Stock per share of the Series B Preferred Stock (equivalent to 1.5291 shares of Common Stock per depositary share), subject to certain anti-dilution and other adjustments. Because each depositary share represents a 1/20th fractional interest in a share of the Series B Preferred Stock, a holder of depositary shares may convert its depositary shares only in lots of 20 depositary shares.

Fundamental Change Conversion. If a fundamental change occurs on or prior to September 1, 2021, holders of the Series B Preferred Stock will have the right to convert their shares of the Series B Preferred Stock, in whole or in part, into shares of Common Stock at the fundamental change conversion rate during the period beginning on, and including, the effective date of such fundamental change and ending on, and including, the date that is 20 calendar days after such effective date (or, if later, the date that is 20 calendar days after holders receive notice of such fundamental change, but in no event later than September 1, 2021). Holders who convert shares of the Series B Preferred Stock during that period will also receive a make-whole dividend amount comprised of a fundamental change dividend make-whole amount, and to the extent there is any, the accumulated dividend amount. Because each depositary share represents a 1/20th fractional interest in a share of the Series B Preferred Stock, a holder of depositary shares may convert its depositary shares upon a fundamental change only in lots of 20 depositary shares.

Ranking. The Series B Preferred Stock, with respect to anticipated dividends and distributions upon CenterPoint Energy’s liquidation or dissolution, or winding-up of CenterPoint Energy’s affairs, ranks or will rank:

• senior to Common Stock and to each other class or series of capital stock established after the initial issue date of the Series B Preferred Stock that is expressly made subordinated to the Series B Preferred Stock;

• on a parity with the Series A Preferred Stock and any class or series of capital stock established after the initial issue date that is not expressly made senior or subordinated to the Series B Preferred Stock;

• junior to any class or series of capital stock established after the initial issue date that is expressly made senior to the Series B Preferred Stock;

• junior to all existing and future indebtedness (including indebtedness outstanding under CenterPoint Energy’s credit facilities, senior notes and commercial paper) and other liabilities with respect to assets available to satisfy claims against CenterPoint Energy; and

• structurally subordinated to any existing and future indebtedness and other liabilities of CenterPoint Energy’s subsidiaries and capital stock of CenterPoint Energy’s subsidiaries held by third parties.

Voting Rights. Holders of the Series B Preferred Stock generally will not have voting rights. Whenever dividends on shares of the Series B Preferred Stock have not been declared and paid for six or more dividend periods (including, for the avoidance of doubt, the dividend period beginning on, and including, the initial issue date and ending on, but excluding, December 1, 2018), whether or not consecutive, the holders of such shares of Series B Preferred Stock, voting together as a single class with holders of any and all other series of voting preferred stock then outstanding (as defined in the Statement of Resolution for the Series B Preferred Stock), will be entitled at CenterPoint Energy’s next annual or special meeting of shareholders to vote for the election of a total of two additional members of CenterPoint Energy’s Board of Directors, subject to certain limitations. This right will terminate if and when all accumulated and unpaid dividends have been paid in full and, upon such termination, the term of office of each director so elected will terminate at such time and the number of directors on CenterPoint Energy’s Board of Directors will automatically decrease by two, subject to the revesting of such rights in the event of each subsequent nonpayment.

Common Stock

On October 1, 2018, CenterPoint Energy completed the issuance of 69,633,027 shares of Common Stock at a price of $27.25 per share, for net proceeds of $1,844 million after issuance costs. The amount issued included 9,082,568 shares of Common Stock issued pursuant to the exercise in full of the option granted to the underwriters to purchase additional shares of Common Stock.

CenterPoint Energy used the net proceeds from the Common Stock offering to fund a portion of the Merger and to pay related fees and expenses.

Undistributed Retained Earnings

As of December 31, 2018 and 2017, CenterPoint Energy’s consolidated retained earnings balance includes undistributed earnings from Enable of $31 million and $-0-, respectively.

Accumulated Other Comprehensive Income (Loss)

Changes in accumulated comprehensive income (loss) are as follows:

	Year Ended December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Beginning Balance	$	(68	)	$	—		$	6		$	(71	)	$	1		$	3
Other comprehensive income (loss) before reclassifications:
Remeasurement of pension and other postretirement plans	(19		)	—			1			4			—			7
Deferred loss from interest rate derivatives (1)	(19		)	(18		)	(1		)	(5		)	(1		)	(2		)
Amounts reclassified from accumulated other comprehensive loss:
Prior service cost (2)	1			—			1			1			—			1
Actuarial losses (2)	6			—			—			7			—			—
Tax benefit (expense)	6			4			(1		)	(4		)	—			(3		)
Net current period other comprehensive income (loss)	(25		)	(14		)	—			3			(1		)	3
Adoption of ASU 2018-02	(15		)	—			(1		)	—			—			—
Ending Balance	$	(108	)	$	(14	)	$	5		$	(68	)	$	—		$	6

(1) Gains and losses are reclassified from Accumulated other comprehensive income into income when the hedged transactions affect earnings. The reclassification amounts are included in Interest and other finance charges in each of the Registrant’s respective Statements of Consolidated Income. Amounts are less than $1 million for each of the years ended December 31, 2018 and 2017, respectively.

(2) Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

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Short Term Borrowings and Long Term Debt

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Short-term Borrowings and Long-term Debt [Text Block]

Short-term Borrowings and Long-term Debt

	December 31, 2018					December 31, 2017
	Long-Term			Current (1)		Long-Term			Current (1)
	(in millions)
CERC (2):
Short-term borrowings:
Inventory financing (3)	$	—		$	—	$	—		$	39
Total short-term borrowings	—			—		—			39
Long-term debt:
Senior notes 3.55% to 6.625% due 2021 to 2047	2,193			—		1,593			—
Commercial paper (4)	210			—		898			—
Unamortized debt issuance costs	(15		)	—		(12		)	—
Unamortized discount and premium, net	(17		)	—		(22		)	—
Total CERC long-term debt	2,371			—		2,457			—
Total CERC debt	2,371			—		2,457			39
Houston Electric:
First mortgage bonds 9.15% due 2021	102			—		102			—
General mortgage bonds 1.85% to 6.95% due 2021 to 2048	3,212			—		2,812			—
Restoration Bond Company:
System restoration bonds 4.243% due 2022	197			59		256			56
Bond Company II:
Transition bonds 5.302% due 2019	—			208		208			194
Bond Company III:
Transition bonds 5.234% due 2020	29			56		85			53
Bond Company IV:
Transition bonds 2.161% to 3.028% due 2020 to 2024	753			135		888			131
Unamortized debt issuance costs	(24		)	—		(22		)	—
Unamortized discount and premium, net	(11		)	—		(10		)	—
Total Houston Electric debt	4,258			458		4,319			434
CenterPoint Energy:
ZENS due 2029 (5)	—			24		—			122
Senior notes 2.50% to 4.25% due 2021 to 2028	2,000			—		500			—
Pollution control bonds 5.125% due 2028 (6)	68			—		68			50
Commercial paper (4)	—			—		855			—
Unamortized debt issuance costs	(13		)	—		(4		)	—
Unamortized discount and premium, net	(2		)	—		—			—
Total CenterPoint Energy long-term debt	8,682			482		8,195			606
Total CenterPoint Energy debt	$	8,682		$	482	$	8,195		$	645

(1) Includes amounts due or exchangeable within one year of the date noted.

(2) Issued by CERC Corp.

(3) CenterPoint Energy’s and CERC’s NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third-party AMAs in Arkansas, Louisiana and Oklahoma expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost.

(4) Classified as long-term debt because the termination date of the facility that backstops the commercial paper is more than one year from the date noted.

(5) CenterPoint Energy’s ZENS obligation is bifurcated into a debt component and an embedded derivative component. For additional information regarding ZENS, see Note 12(b). As ZENS are exchangeable for cash at any time at the option of the holders, these notes are classified as a current portion of long-term debt.

(6) $68 million and $118 million of these series of debt were secured by general mortgage bonds of Houston Electric as of December 31, 2018 and 2017, respectively.

Long-term Debt

Debt Retirements. During the year ended December 31, 2018, CenterPoint Energy retired the following debt instrument at maturity:

Registrant	Retirement Date	Debt Instrument	Aggregate Principal Amount (1)		Interest Rate	Maturity Date
			(in millions)
CenterPoint Energy	November 2018	Pollution control bonds	$	50	5.050%	2018

(1) Secured by general mortgage bonds of Houston Electric.

Debt Issuances. During the year ended December 31, 2018 and in January 2019, the Registrants issued the following debt instruments:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Interest Rate	Maturity Date
			(in millions)
Houston Electric (1)	February 2018	General mortgage bonds	$	400	3.95%	2048
CERC (1) (2)	March 2018	Unsecured senior notes	300		3.55%	2023
CERC (1) (2)	March 2018	Unsecured senior notes	300		4.00%	2028
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.60%	2021
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.85%	2024
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		4.25%	2028
Houston Electric (1)	January 2019	General mortgage bonds	700		4.25%	2049

(1) Proceeds from these debt issuances were used for general limited liability company and corporate purposes, as applicable, including capital expenditures, repayment of portions of outstanding commercial paper and borrowings under CenterPoint Energy’s money pool.

(2) Issued by CERC Corp.

(3) Proceeds from these debt issuances were used to fund a portion of the Merger and to pay related fees and expenses.

Securitization Bonds. As of December 31, 2018, CenterPoint Energy and Houston Electric had special purpose subsidiaries consisting of the Bond Companies, which they consolidate. The consolidated special purpose subsidiaries are wholly-owned, bankruptcy remote entities that were formed solely for the purpose of purchasing and owning transition or system restoration property through the issuance of transition bonds or system restoration bonds and activities incidental thereto. These Securitization Bonds are payable only through the imposition and collection of “transition” or “system restoration” charges, as defined in the Texas Public Utility Regulatory Act, which are irrevocable, non-bypassable charges to provide recovery of authorized qualified costs. CenterPoint Energy and Houston Electric have no payment obligations in respect of the Securitization Bonds other than to remit the applicable transition or system restoration charges they collect as set forth in servicing agreements among Houston Electric, the Bond Companies and other parties. Each special purpose entity is the sole owner of the right to impose, collect and receive the applicable transition or system restoration charges securing the bonds issued by that entity. Creditors of CenterPoint Energy or Houston Electric have no recourse to any assets or revenues of the Bond Companies (including the transition and system restoration charges), and the holders of Securitization Bonds have no recourse to the assets or revenues of CenterPoint Energy or Houston Electric.

Credit Facilities. In April 2018, CenterPoint Energy obtained commitments by lenders to provide a $5 billion Bridge Facility to provide flexibility for the timing of the long-term acquisition financing and fund, in part, amounts payable by CenterPoint Energy in connection with the Merger. In May 2018, CenterPoint Energy entered into an amendment to its revolving credit facility to increase the aggregate commitments from $1.7 billion to $3.3 billion effective the earlier of (i) the termination of all commitments by certain lenders to provide the Bridge Facility and (ii) the payment in full of all obligations (other than contingent obligations) under the Bridge Facility and termination of all commitments to advance additional credit thereunder, and in each case, so long as the Merger Agreement has not been terminated pursuant to the terms thereof without consummation of the Merger. This increase to CenterPoint Energy’s revolving credit facility will automatically expire on the termination date of the revolving credit facility. In addition, the amendment provided for a temporary increase on the maximum ratio of debt for borrowed money to capital from 65% to 75% until the earlier of (i) June 30, 2019 and (ii) the termination of all commitments in respect of the Bridge Facility without any borrowing thereunder. On October 5, 2018, CenterPoint Energy terminated all remaining commitments by lenders to provide the Bridge Facility. As a result, the aggregate commitments under the revolving credit facility automatically increased from $1.7 billion to $3.3 billion and the maximum ratio of debt for borrowed money to capital reverted to 65%.

As of December 31, 2018 and 2017, the Registrants had the following revolving credit facilities and utilization of such facilities:

	December 31, 2018										December 31, 2017
	Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate		Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate
	(in millions, except weighted average interest rate)
CenterPoint Energy	$	3,300	$	—	$	6	$	—	—		$	1,700	$	—	$	6	$	855	1.88	%
Houston Electric	300		—		4		—		—		300		—		4		—		—
CERC (1)	900		—		1		210		2.93	%	900		—		1		898		1.72	%
Total	$	4,500	$	—	$	11	$	210			$	2,900	$	—	$	11	$	1,753

(1) Issued by CERC Corp.

In January 2019, CenterPoint Energy issued the following commercial paper in connection with the closing of the Merger:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Weighted Average Interest Rate
			(in millions)
CenterPoint Energy (1) (2)	January 2019	Commercial paper	$	1,660	2.88%

(1) Proceeds from these commercial paper issuances were used to fund a portion of the Merger and to pay related fees and expenses and were contributed to Vectren for its payment of its stub period cash dividend, long-term incentive payments and to fund the repayment of indebtedness of Vectren subsidiaries redeemed at the option of the holder as a result of the closing of the Merger.

(2) The commercial paper notes were issued at various times in January 2019 with maturities up to and including 90 days as of the time of issuance, and, prior to their use as described in connection with the closing of the Merger, the net proceeds of such issuances were invested in short-term investments.

Execution  Date	Registrant	Size of Facility			Draw Rate of LIBOR plus (1)	Financial Covenant Limit on Debt for Borrowed Money to Capital Ratio (2)	Debt for Borrowed Money to Capital Ratio as of December 31, 2018 (3)	Termination  Date (4)
		(in millions)
March 3, 2016	CenterPoint Energy	$	3,300	(5)	1.250%	65%	44.9%	March 3, 2022
March 3, 2016	Houston Electric	300			1.125%	65%	49.2%	March 3, 2022
March 3, 2016	CERC (6)	900			1.125%	65%	46.8%	March 3, 2022

(1) Based on credit ratings as of December 31, 2018.

(2) For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase from 65% to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification.

(3) As defined in the revolving credit facility agreement, excluding Securitization Bonds.

(4) Amended on June 16, 2017 to extend the termination date.

(5) Pursuant to the amendment entered into in May 2018, the aggregate commitments under the CenterPoint Energy revolving credit facility increased to $3.3 billion on October 5, 2018 as a result of the satisfaction of certain conditions described above.

(6) Issued by CERC Corp.

The Registrants were in compliance with all financial debt covenants as of December 31, 2018.

Maturities.  As of December 31, 2018, maturities of long-term debt, capital leases and sinking fund requirements, excluding the ZENS obligation, are as follows:

	CenterPoint Energy (1)		Houston  Electric (1)		CERC		Securitization Bonds
	(in millions)
2019	$	458	$	458	$	—	$	458
2020	231		231		—		231
2021	1,706		613		593		211
2022	1,230		519		210		219
2023	656		356		300		156

(1) These maturities include Securitization Bonds principal repayments on scheduled payment dates.

Liens.  As of December 31, 2018, Houston Electric’s assets were subject to liens securing approximately $102 million of first mortgage bonds. Sinking or improvement fund and replacement fund requirements on the first mortgage bonds may be satisfied by certification of property additions. Sinking fund and replacement fund requirements for 2018, 2017 and 2016 have been satisfied by certification of property additions. The replacement fund requirement to be satisfied in 2019 is approximately $283 million, and the sinking fund requirement to be satisfied in 2019 is approximately $1.6 million. CenterPoint Energy expects Houston Electric to meet these 2019 obligations by certification of property additions.

As of December 31, 2018, Houston Electric’s assets were also subject to liens securing approximately $3.3 billion of general mortgage bonds, including approximately $68 million held in trust to secure pollution control bonds for which CenterPoint Energy is obligated. The lien of the general mortgage indenture is junior to that of the mortgage pursuant to which the first mortgage bonds are issued. Houston Electric may issue additional general mortgage bonds on the basis of retired bonds, 70% of property additions or cash deposited with the trustee.  Approximately $4.3 billion of additional first mortgage bonds and general mortgage bonds could be issued on the basis of retired bonds and 70% of property additions as of December 31, 2018. Houston Electric has contractually agreed that it will not issue additional first mortgage bonds, subject to certain exceptions.

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Income Taxes

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes [Text Block]

Income Taxes

The components of the Registrant’ income tax expense (benefit) were as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy
Current income tax expense:
Federal	$	89		$	32		$	23
State	9			9			18
Total current expense	98			41			41
Deferred income tax expense (benefit):
Federal	(25		)	(806		)	185
State	73			36			28
Total deferred expense (benefit)	48			(770		)	213
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Houston Electric
Current income tax expense:
Federal	$	109		$	70		$	165
State	18			19			18
Total current expense	127			89			183
Deferred income tax benefit:
Federal	(38		)	(98		)	(34		)
Total deferred benefit	(38		)	(98		)	(34		)
Total income tax expense (benefit)	$	89		$	(9	)	$	149
CERC - Continuing Operations
Current income tax expense (benefit):
Federal	$	(9	)	$	(31	)	$	21
State	—			(10		)	4
Total current expense (benefit)	(9		)	(41		)	25
Deferred income tax expense (benefit):
Federal	10			(249		)	41
State	21			25			15
Total deferred expense (benefit)	31			(224		)	56
Total income tax expense (benefit)	$	22		$	(265	)	$	81

	Year Ended December 31,
	2018		2017		2016
	(in millions)
CERC - Discontinued Operations
Current income tax expense (benefit):
Federal	$	9	$	31	$	(21	)
State	4		11		2
Total current expense (benefit)	13		42		(19		)
Deferred income tax expense:
Federal	29		56		90
State	4		6		10
Total deferred expense	33		62		100
Total income tax expense	$	46	$	104	$	81

A reconciliation of income tax expense (benefit) using the federal statutory income tax rate to the actual income tax expense and resulting effective income tax rate is as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy (1) (2) (3)
Income before income taxes	$	514		$	1,063		$	686
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	108			372			240
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	22			26			27
State valuation allowance, net of federal income tax	11			3			3
State law change, net of federal income tax	32			—			—
Federal income tax rate reduction	—			(1,113		)	—
Excess deferred income tax amortization	(24		)	—			—
Other, net	(3		)	(17		)	(16		)
Total	38			(1,101		)	14
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Effective tax rate	28		%	(69		)%	37		%
Houston Electric (4) (5)
Income before income taxes	$	425		$	424		$	425
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	89			148			149
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	14			12			12
Federal income tax rate reduction	—			(158		)	—
Excess deferred income tax amortization	(9		)	—			—
Other, net	(5		)	(11		)	(12		)
Total	—			(157		)	—
Total income tax expense (benefit)	$	89		$	(9	)	$	149
Effective tax rate	21		%	(2		)%	35		%

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CERC - Continuing Operations (6) (7)
Income before income taxes	$	92		$	319		$	199
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	19			112			70
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	5			6			4
State law change, net of federal income tax	—			—			6
State valuation allowance, net of federal income tax	11			3			2
Federal income tax rate reduction	—			(396		)	—
Excess deferred income tax amortization	(15		)	—			—
Tax basis balance sheet adjustment	—			11			—
Other, net	2			(1		)	(1		)
Total	3			(377		)	11
Total income tax expense (benefit)	$	22		$	(265	)	$	81
Effective tax rate	24		%	(83		)%	41		%
CERC - Discontinued Operations (7)
Income before income taxes	$	184		$	265		$	208
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	39			93			73
Increase in tax expense resulting from:
State income tax expense, net of federal income tax	7			11			8
Total	7			11			8
Total income tax expense	$	46		$	104		$	81
Effective tax rate	25		%	39		%	39		%

(1) Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(2) Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

(3) Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

(4) Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(5) Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

(6) Recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. This item is partially offset by $15 million of amortization of the net regulatory EDIT liability in certain jurisdictions as decreed by regulators beginning in 2018.

(7) Recognized a $396 million deferred tax benefit from the remeasurement of CERC’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. ASC 740 requires tax impacts of changes in tax laws or rates be reported in continuing operations.  Therefore, CERC’s federal income tax benefit generated by the remeasurement of the ADFIT liability for Enable during 2017 and state law changes during 2016 associated with its investment in Enable are reported in continuing operations on CERC’s Statements of Consolidated Income. The ADFIT liability associated with CERC’s investment in Enable is reported as discontinued operations on CERC’s Consolidated Balance Sheets. 

The tax effects of temporary differences that give rise to significant portions of deferred tax assets and liabilities were as follows:

	December 31,
	2018			2017
	(in millions)
CenterPoint Energy
Deferred tax assets:
Benefits and compensation	$	160		$	162
Regulatory liabilities	356			347
Loss and credit carryforwards	84			90
Asset retirement obligations	62			68
Other	29			16
Valuation allowance	(18		)	(7		)
Total deferred tax assets	673			676
Deferred tax liabilities:
Property, plant and equipment	1,894			1,808
Investment in unconsolidated affiliates	987			927
Regulatory assets	395			473
Investment in marketable securities and indexed debt	478			502
Indexed debt securities derivative	27			13
Other	131			127
Total deferred tax liabilities	3,912			3,850
Net deferred tax liabilities	$	3,239		$	3,174
Houston Electric
Deferred tax assets:
Regulatory liabilities	$	205		$	198
Benefits and compensation	17			28
Asset retirement obligations	7			7
Other	12			3
Total deferred tax assets	241			236
Deferred tax liabilities:
Property, plant and equipment	1,087			1,030
Regulatory assets	177			265
Total deferred tax liabilities	1,264			1,295
Net deferred tax liabilities	$	1,023		$	1,059

	December 31,
	2018			2017
	(in millions)
CERC - Continuing Operations
Deferred tax assets:
Benefits and compensation	$	27		$	27
Regulatory liabilities	150			150
Loss and credit carryforwards	259			288
Asset retirement obligations	54			60
Other	20			18
Valuation allowance	(18		)	(7		)
Total deferred tax assets	492			536
Deferred tax liabilities:
Property, plant and equipment	773			745
Regulatory assets	41			38
Other	84			115
Total deferred tax liabilities	898			898
Net deferred tax liabilities	$	406		$	362
CERC - Discontinued Operations
Deferred tax liabilities:
Investment in unconsolidated affiliates	—			927
Net deferred tax liabilities	$	—		$	927

Federal Tax Reform

On December 22, 2017, President Trump signed into law comprehensive tax reform legislation informally called the Tax Cuts and Jobs Acts, or TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018.  The new legislation contained several key tax provisions that impacted the Registrants, including the reduction of the corporate income tax rate from 35% to 21% effective January 1, 2018. The legislation also includes a variety of other changes, such as, a limitation on the tax deductibility of interest expense, acceleration of business asset expensing and reduction in the amount of executive pay that may qualify for a tax deduction, among others. Several other provisions of the TCJA were not generally applicable to the public utility industry, including the limitation on the tax deductibility of interest expense and the acceleration of business asset expensing.

While the effective date of the rate change in the legislation was January 1, 2018, ASC 740 requires that deferred tax balances be adjusted in the period of enactment to the rate in which those deferred taxes will reverse.

During 2017, CenterPoint Energy’s EDIT from the rate change resulted in an adjustment to income tax expense of approximately $1.1 billion and creation of a net regulatory liability of $1.3 billion (includes $0.3 billion gross-up) for the amount that is likely to be returned to ratepayers. The major components of the $1.1 billion benefit to income tax expense are for the remeasurement of CenterPoint Energy's deferred taxes associated with its investment in Enable, investment in marketable securities (ZENS) and stranded costs related to the Securitization Bonds.

During 2017, Houston Electric’s EDIT from the rate change resulted in an adjustment to income tax expense of $158 million and creation of a net regulatory liability of $829 million (includes $180 million gross-up) for the amount that is likely to be returned to ratepayers. The $158 million benefit to income tax expense is for the remeasurement of Houston Electric’s stranded costs related to the Securitization Bonds.

During 2017, CERC’s EDIT from the rate change resulted in an adjustment to income tax expense of $396 million and creation of a net regulatory liability of $478 million (includes $121 million gross-up) for the amount that is likely to be returned to ratepayers. The major components of the $396 million benefit to income tax expense were for the remeasurement of CERC’s deferred taxes associated with its investment in Enable and federal net operating loss carryforwards.

The amount and expected amortization of the net regulatory tax liability may differ from the Registrants’ estimates, possibly materially, due to, among other things, regulatory actions, interpretations and assumptions the Registrants have made, and any guidance that may be issued in the future. The Registrants will continue to assess the amount and expected amortization of the net regulatory tax liability as they have proceedings with regulators in future periods.

Houston Electric and CERC are included in CenterPoint Energy’s U.S. federal consolidated income tax return. Houston Electric and CERC report their income tax provision on a separate entity basis pursuant to a tax sharing agreement with CenterPoint Energy.

Tax Attribute Carryforwards and Valuation Allowance.  CenterPoint Energy has no remaining federal net operating loss carryforward or federal tax credits as of December 31, 2018. As of December 31, 2018, CenterPoint Energy had $802 million of state net operating loss carryforwards that expire between 2019 and 2038 and $18 million of state tax credits that do not expire. CenterPoint Energy reported a valuation allowance of $18 million because it is more likely than not that the benefit from certain state net operating loss carryforwards will not be realized.

CERC has $951 million of federal net operating loss carryforwards which have an indefinite carryforward period, however, utilization is limited to 80 percent of taxable income in any given taxable year. CERC has $797 million of state net operating loss carryforwards which expire between 2019 and 2038 and $17 million of state tax credits which do not expire. CERC reported a valuation allowance of $18 million since it is more likely than not that the benefit from certain state net operating loss carryforwards will not be realized.

Uncertain Income Tax Positions. The Registrants reported no uncertain tax liabilities as of December 31, 2018, 2017 and 2016. The Registrants expect no significant change to the uncertain tax liabilities over the next 12 months ending December 31, 2019.

Tax Audits and Settlements.   Tax years through 2016 have been audited and settled with the IRS, however, during 2018 CenterPoint Energy filed an amended 2014 tax return to claim additional tax credits that is currently under review by the IRS. For the 2017 and 2018 tax years, the Registrants are participants in the IRS’s Compliance Assurance Process.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies [Text Block]

Commitments and Contingencies

(a) Natural Gas Supply Commitments (CenterPoint Energy and CERC)

Natural gas supply commitments include natural gas contracts related to CenterPoint Energy’s and CERC’s Natural Gas Distribution and Energy Services reportable segments, which have various quantity requirements and durations, that are not classified as non-trading derivative assets and liabilities in CenterPoint Energy’s and CERC’s Consolidated Balance Sheets as of December 31, 2018 and 2017 as these contracts meet an exception as “normal purchases contracts” or do not meet the definition of a derivative. Natural gas supply commitments also include natural gas transportation contracts that do not meet the definition of a derivative.

As of December 31, 2018, minimum payment obligations for natural gas supply commitments are approximately:

	(in millions)
2019	$	454
2020	430
2021	343
2022	231
2023	154
2024 and beyond	1,446

(b) AMAs (CenterPoint Energy and CERC)

NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third party AMAs in Arkansas, Louisiana and Oklahoma expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost. Generally, AMAs are contracts between NGD and an asset manager that are intended to transfer the working capital obligation and maximize the utilization of the assets.  In these AMAs, NGD agrees to release transportation and storage capacity to other parties to manage natural gas storage, supply and delivery arrangements for NGD and to use the released capacity for other purposes when it is not needed for NGD. NGD is compensated by the asset manager through payments made over the life of the AMAs. NGD has an obligation to purchase its winter storage requirements that have been released to the asset manager under these AMAs.

(c) Lease Commitments

The following table sets forth information concerning the Registrants’ obligations under non-cancelable long-term operating leases as of December 31, 2018, which primarily consist of rental agreements for real property:            

	CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	6	$	1	$	5
2020	6		—		5
2021	5		—		4
2022	4		—		4
2023	3		—		3
2024 and beyond	12		—		11
Total	$	36	$	1	$	32

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Lease expense	$	9	$	1	$	8	$	10	$	1	$	9	$	10	$	1	$	9

(d) Legal, Environmental and Other Matters

Legal Matters (CenterPoint Energy and CERC)

Gas Market Manipulation Cases. CenterPoint Energy, its predecessor, Reliant Energy, and certain of their former subsidiaries were named as defendants in a large number of lawsuits filed against numerous gas market participants in a number of federal and western state courts in connection with the operation of the natural gas markets in 2000-2002. CenterPoint Energy and its affiliates were released or dismissed from all such cases, except for one case pending in federal court in Nevada in which CES, a subsidiary of CERC Corp., is a defendant. Plaintiffs in that case allege a conspiracy to inflate Wisconsin natural gas prices in 2000-2002. In May 2016, the district court granted CES’s motion for summary judgment, dismissing CES from the case. In August 2018, the Ninth Circuit Court of Appeals reversed that ruling, and CES requested further appellate review of that decision (which review has been stayed pending approval of the settlement agreement described below).

Under a master separation agreement between CenterPoint Energy and a former subsidiary, RRI, CenterPoint Energy and its subsidiaries are entitled to be indemnified by RRI and its successors for any losses, including certain attorneys’ fees and other costs, arising out of these lawsuits.  Through a series of transactions, RRI became known as GenOn and a wholly-owned subsidiary of NRG. None of those transactions alters GenOn’s contractual obligations to indemnify CenterPoint Energy and its subsidiaries for certain liabilities, including their indemnification obligations regarding the gas market manipulation litigation. In June 2017, however, GenOn and various affiliates filed for protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2018, GenOn completed its reorganization and emerged from Chapter 11. CenterPoint Energy, CERC, and CES submitted proofs of claim in the bankruptcy proceedings to protect their indemnity rights. In October 2018, CES, GenOn, and the plaintiffs reached an agreement to settle all claims against CES and CES’s indemnity claims against GenOn, subject to approvals by the bankruptcy court and the federal district court. In January 2019, the bankruptcy court approved the settlement between CES and GenOn. If the settlement agreement between CES, GenOn and the plaintiffs is not approved by the federal district court, CES could incur liability and be responsible for satisfying it. CenterPoint Energy does not expect the ultimate outcome of this matter to have a material adverse effect on its financial condition, results of operations or cash flows.

Minnehaha Academy. On August 2, 2017, a natural gas explosion occurred at the Minnehaha Academy in Minneapolis, Minnesota, resulting in the deaths of two school employees, serious injuries to others and significant property damage to the school.  CenterPoint Energy, certain of its subsidiaries, including CERC, and the contractor company working in the school have been named in litigation arising out of this incident. CenterPoint Energy and CERC have reached confidential settlement agreements with some claimants. Additionally, CenterPoint Energy and CERC are cooperating with the ongoing investigation conducted by the National Transportation Safety Board. Further, CenterPoint Energy and CERC are contesting approximately $200,000 in fines imposed by the Minnesota Office of Pipeline Safety.  In early 2018, the Minnesota Occupational Safety and Health Administration concluded its investigation without any adverse findings against CenterPoint Energy or CERC. CenterPoint Energy’s and CERC’s general and excess liability insurance policies provide coverage for third party bodily injury and property damage claims. 

Environmental Matters

MGP Sites(CenterPoint Energy and CERC). CenterPoint Energy, CERC and its predecessors operated MGPs in the past.  With respect to certain Minnesota MGP sites, CenterPoint Energy and CERC have completed state-ordered remediation and continue state-ordered monitoring and water treatment. As of December 31, 2018, CenterPoint Energy and CERC had a recorded liability of $7 million for continued monitoring and any future remediation required by regulators in Minnesota. The estimated range of possible remediation costs for the sites for which CenterPoint Energy and CERC believe they may have responsibility was $5 million to $32 million based on remediation continuing for 30 to 50 years. The cost estimates are based on studies of a site or industry average costs for remediation of sites of similar size. The actual remediation costs will depend on the number of sites to be remediated, the participation of other PRPs, if any, and the remediation methods used. 

In addition to the Minnesota sites, the EPA and other regulators have investigated MGP sites that were owned or operated by CenterPoint Energy or CERC or may have been owned by one of their former affiliates. CenterPoint Energy and CERC do not expect the ultimate outcome of these matters to have a material adverse effect on the financial condition, results of operations or cash flows of either CenterPoint Energy or CERC.

Asbestos.Some facilities owned by the Registrants or their predecessors in interest contain or have contained asbestos insulation and other asbestos-containing materials. The Registrants are from time to time named, along with numerous others, as defendants in lawsuits filed by a number of individuals who claim injury due to exposure to asbestos, and the Registrants anticipate that additional claims may be asserted in the future.  Although their ultimate outcome cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows.

Other Environmental. From time to time, the Registrants identify the presence of environmental contaminants during operations or on property where predecessor companies have conducted operations.  Other such sites involving contaminants may be identified in the future.  The Registrants have and expect to continue to remediate any identified sites consistent with state and federal legal obligations.  From time to time, the Registrants have received notices, and may receive notices in the future, from regulatory authorities or others regarding status as a PRP in connection with sites found to require remediation due to the presence of environmental contaminants. In addition, the Registrants have been, or may be, named from time to time as defendants in litigation related to such sites. Although the ultimate outcome of such matters cannot be predicted at this time, the Registrants do not expect these matters, either individually or in the aggregate, to have a material adverse effect on their financial condition, results of operations or cash flows.

Other Proceedings

The Registrants are involved in other legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. From time to time, the Registrants are also defendants in legal proceedings with respect to claims brought by various plaintiffs against broad groups of participants in the energy industry. Some of these proceedings involve substantial amounts. The Registrants regularly analyze current information and, as necessary, provide accruals for probable and reasonably estimable liabilities on the eventual disposition of these matters. The Registrants do not expect the disposition of these matters to have a material adverse effect on the Registrants’ financial condition, results of operations or cash flows.

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Earnings Per Share (CenterPoint Energy)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share (CenterPoint Energy) [Text Block]

Earnings Per Share(CenterPoint Energy)

The following table reconciles numerators and denominators of CenterPoint Energy’s basic and diluted earnings per common share. Basic earnings per common share is determined by dividing Income available to common shareholders - basic by the Weighted average common shares outstanding - basic for the applicable period. Diluted earnings per common share is determined by the inclusion of potentially dilutive common stock equivalent shares that may occur if securities to issue Common Stock were exercised or converted into Common Stock.

	For the Year Ended December 31,
	2018		2017		2016
	(in millions, except per share and share amounts)
Numerator:
Income available to common shareholders - basic (1)	$	333	$	1,792	$	432
Add back: Series B Preferred Stock dividend	—		—		—
Income available to common shareholders - diluted (1)	$	333	$	1,792	$	432
Denominator:
Weighted average common shares outstanding - basic	448,829,000		430,964,000		430,606,000
Plus: Incremental shares from assumed conversions:
Restricted stock (2)	3,636,000		3,344,000		2,997,000
Series B Preferred Stock (3)	—		—		—
Weighted average common shares outstanding - diluted	452,465,000		434,308,000		433,603,000
Earnings per common share:
Basic earnings per common share	$	0.74	$	4.16	$	1.00
Diluted earnings per common share	$	0.74	$	4.13	$	1.00

(1) Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

(2) The potentially dilutive impact from restricted stock awards applies the treasury stock method. Under this method, an increase in the average fair market value of Common Stock can result in a greater dilutive impact from these securities.

(3) The potentially dilutive impact from Series B Preferred Stock applies the if-converted method in calculating diluted earnings per common share. Under this method, diluted earnings per common share is adjusted for the more dilutive effect of the Series B Preferred Stock as a result of either its accumulated dividend for the period in the numerator or the assumed-converted common share equivalent in the denominator. The computation of diluted earnings per common share outstanding for the year ended December 31, 2018 excludes 8,885,000 potentially dilutive shares because to include them would be anti-dilutive. However, these shares could be potentially dilutive in the future.

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Unaudited Quarterly Information

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Information [Text Block]

Unaudited Quarterly Information

Summarized quarterly financial data is as follows:

	Year Ended December 31, 2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	3,155	$	2,186		$	2,212	$	3,036
Operating income	251		187			226		167
Income (loss) available to common shareholders	165		(75		)	153		90
Basic earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18
Diluted earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18

	Year Ended December 31, 2018
	First Quarter	Second Quarter		Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
Houston Electric
Revenues	755	854		897		728
Operating income	119	181		227		98
Net income	52	101		143		40
CERC (4)
Revenues	2,400	1,328		1,312		2,303
Operating income (loss)	131	22		(7	)	76
Income (loss) from continuing operations	78	(8	)	(35	)	35
Income (loss) from discontinued operations	52	44		44		(2	)
Net income	130	36		9		33

	Year Ended December 31, 2017
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	2,735	$	2,143	$	2,098		$	2,638
Operating income (2)	291		240		297			308
Income available to common shareholders (3)	192		135		169			1,296
Basic earnings per common share (1)	0.45		0.31		0.39			3.01
Diluted earnings per common share (1)	0.44		0.31		0.39			2.99
Houston Electric
Revenues	638		752		843			765
Operating income (2)	85		171		254			127
Net income (3)	18		75		130			210
CERC (4)
Revenues	2,093		1,387		1,251			1,872
Operating income (2)	199		59		31			178
Income (loss) from continuing operations	102		17		(4		)	469
Income from discontinued operations	45		37		42			37
Net income (3)	147		54		38			506

(1) Quarterly earnings (loss) per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings (loss) per common share.

(2) Recast to reflect the adoption of ASU 2017-07. See Note 2(r) for further information.

(3) Income available to common shareholders and Net income for the fourth quarter 2017 include a reduction in income tax expense of $1,113 million, $158 million and $396 million for CenterPoint Energy, Houston Electric and CERC, respectively, due to the TCJA. See Note 15 for further discussion of the impacts of tax reform implementation.

(4) Amounts have been recast to reflect discontinued operations in all periods presented.

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Reportable Segments

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Reportable Segments [Text Block]

Reportable Segments

The Registrants’ determination of reportable segments considers the strategic operating units under which the Registrants manage sales, allocate resources and assess performance of various products and services to wholesale or retail customers in differing regulatory environments. The Registrants use operating income as the measure of profit or loss for the reportable segments other than Midstream Investments, where equity in earnings is used.

As of December 31, 2018, reportable segments by Registrant are as follows:

	Electric Transmission & Distribution	Natural Gas Distribution	Energy  Services	Midstream Investments	Other Operations
CenterPoint Energy	X	X	X	X	X
Houston Electric	X
CERC		X	X	(1)	X

(1) On September 4, 2018, CERC completed the Internal Spin. Previously, CERC’s equity method investment in Enable was included in CERC’s Midstream Investments reportable segment. CERC’s equity in earnings in Enable, net of basis difference amortization and income tax, have been classified as discontinued operations for all periods presented. See Note 11 for further discussion on the Internal Spin and the associated discontinued operations presentation.

Electric Transmission & Distribution consists of the electric transmission and distribution function. Natural Gas Distribution consists of intrastate natural gas sales to, and natural gas transportation and distribution for, residential, commercial, industrial and institutional customers. Energy Services consists of non-rate regulated natural gas sales and services operations. Midstream Investments consists of the equity investment in Enable (excluding the Enable Series A Preferred Units). Other Operations consists primarily of other corporate operations which support all of the business operations.

Houston Electric consists of a single reportable segment, Electric Transmission & Distribution, and therefore is not included in the tabular reportable segment presentation below.

Operating income (loss) amounts for 2017 and 2016 have been recast to reflect the adoption of ASU 2017-07 (see Note 2(r) for further information).

Long-lived assets include net property, plant and equipment, goodwill and other intangibles and equity investments in unconsolidated subsidiaries. Intersegment sales are eliminated in consolidation.

Financial data for reportable segments and products and services are as follows:

CenterPoint Energy

	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Electric Transmission & Distribution	$	3,232	(1)	$	—		$	917	$	623		$	10,509			$	952
Natural Gas Distribution	2,931			36			277		266			6,956				638
Energy Services	4,411			110			16		(47		)	1,558				20
Midstream Investments (2)	—			—			—		—			2,482				—
Other Operations	15			—			33		(11		)	6,156			(3)	110
Eliminations	—			(146		)	—		—			(652		)		—
Consolidated	$	10,589		$	—		$	1,243	$	831		$	27,009			1,720
Reconciling items																(69		)
Capital expenditures per Statements of Consolidated Cash Flows																$	1,651

	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income		Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2017:
Electric Transmission & Distribution	$	2,997	(1)	$	—		$	724	$	636	$	10,292			$	924
Natural Gas Distribution	2,606			33			260		348		6,608				523
Energy Services	3,997			52			19		126		1,521				11
Midstream Investments (2)	—			—			—		—		2,472				—
Other Operations	14			—			33		26		2,497			(3)	36
Eliminations	—			(85		)	—		—		(654		)		—
Consolidated	$	9,614		$	—		$	1,036	$	1,136	$	22,736			1,494
Reconciling items															(68		)
Capital expenditures per Statements of Consolidated Cash Flows															$	1,426
As of and for the year ended December 31, 2016:
Electric Transmission & Distribution	$	3,060	(1)	$	—		$	838	$	653	$	10,211			$	858
Natural Gas Distribution	2,380			29			242		321		6,099				510
Energy Services	2,073			26			7		21		1,102				5
Midstream Investments (2)	—			—			—		—		2,505				—
Other Operations	15			—			39		28		2,681			(3)	33
Eliminations	—			(55		)	—		—		(769		)		—
Consolidated	$	7,528		$	—		$	1,126	$	1,023	$	21,829			1,406
Reconciling items															8
Capital expenditures per Statements of Consolidated Cash Flows															$	1,414

(1) CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Affiliates of NRG	$	705	$	713	$	698
Affiliates of Vistra Energy Corp.	251		229		220

(2) CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Enable	$	307	$	265	$	208

(3) Total assets included pension and other postemployment-related regulatory assets of $665 million, $600 million and $759 million as of December 31, 2018, 2017 and 2016, respectively. Additionally, total assets as of December 31, 2018 included $3.9 billion of temporary investments included in Cash and cash equivalents on CenterPoint Energy’s Consolidated Balance Sheets.

CERC

	Revenues from External Customers		Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets (1)				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Natural Gas Distribution	$	2,931	$	36		$	277	$	266		$	6,956			$	638
Energy Services	4,411		110			16		(47		)	1,558				20
Other Operations	1		—			—		3			66				—
Eliminations	—		(146		)	—		—			(366		)		—
Consolidated	$	7,343	$	—		$	293	$	222		$	8,214			658
Reconciling items															(25		)
Capital expenditures per Statements of Consolidated Cash Flows															$	633
As of and for the year ended December 31, 2017:
Natural Gas Distribution	$	2,606	$	33		$	260	$	348		$	6,608			$	523
Energy Services	3,997		52			19		126			1,521				11
Discontinued operations	—		—			—		—			2,472			(1)	—
Other Operations	—		—			—		(7		)	70				—
Eliminations	—		(85		)	—		—			(559		)		—
Consolidated	$	6,603	$	—		$	279	$	467		$	10,112			534
Reconciling items															(21		)
Capital expenditures per Statements of Consolidated Cash Flows															$	513
As of and for the year ended December 31, 2016:
Natural Gas Distribution	$	2,380	$	29		$	242	$	321		$	6,099			$	510
Energy Services	2,073		26			7		21			1,102				5
Discontinued operations	—		—			—		—			2,505			(1)	—
Other Operations	1		—			—		(1		)	75				—
Eliminations	—		(55		)	—		—			(563		)		—
Consolidated	$	4,454	$	—		$	249	$	341		$	9,218			515
Reconciling items															2
Capital expenditures per Statements of Consolidated Cash Flows															$	517

(1) On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

	Year Ended December 31,
	2018						2017						2016
Revenues by Products and Services:	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Electric delivery	$	3,232	$	3,234	$	—	$	2,997	$	2,998	$	—	$	3,060	$	3,059	$	—
Retail gas sales	4,161		—		4,161		3,634		—		3,634		3,329		—		3,329
Wholesale gas sales	3,008		—		3,008		2,811		—		2,811		977		—		977
Gas transportation and processing	32		—		32		29		—		29		23		—		23
Energy products and services	156		—		142		143		—		129		139		—		125
Total	$	10,589	$	3,234	$	7,343	$	9,614	$	2,998	$	6,603	$	7,528	$	3,059	$	4,454

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Supplemental Disclosure of Cash Flow Information

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosure of Cash Flow Information [Text Block]

Supplemental Disclosure of Cash Flow Information

The tables below provide supplemental disclosure of cash flow information:

	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy			Houston Electric		CERC
	(in millions)
Cash Payments/Receipts:
Interest, net of capitalized interest	$	363	$	200	$	105	$	378	$	205	$	116	$	406		$	209	$	116
Income taxes (refunds), net	89		154		3		15		76		4		(104		)	128		3
Non-cash transactions:
Accounts payable related to capital expenditures	201		124		80		144		104		56		87			65		35
Capital distribution associated with the Internal Spin	—		—		1,473		—		—		—		—			—		—

The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Consolidated Balance Sheets to the amount reported in the Statements of Consolidated Cash Flows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Cash and cash equivalents (1) (2)	$	4,231	$	335	$	14	$	260	$	238	$	12
Restricted cash included in Prepaid expenses and other current assets	46		34		11		35		35		—
Restricted cash included in Other	1		1		—		1		1		—
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows	$	4,278	$	370	$	25	$	296	$	274	$	12

(1) CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

(2) Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

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Related Party Transactions (Houston Electric and CERC)

12 Months Ended

Dec. 31, 2018

Related Party Transactions [Abstract]

Related Party Transactions (Houston Electric and CERC) [Text Block]

Related Party Transactions (Houston Electric and CERC)

Houston Electric and CERC participate in a money pool through which they can borrow or invest on a short-term basis. Funding needs are aggregated and external borrowing or investing is based on the net cash position. The net funding requirements of the money pool are expected to be met with borrowings under CenterPoint Energy’s revolving credit facility or the sale of CenterPoint Energy’s commercial paper.The table below summarizes money pool activity:

	December 31, 2018						December 31, 2017
	Houston Electric			CERC			Houston Electric			CERC
	(in millions)
Money pool investments (borrowings) (1)	$	(1	)	$	114		$	(60	)	$	(570	)
Weighted average interest rate	2.42		%	2.42		%	1.90		%	1.90		%

(1) Included in Accounts and notes receivable (payable)–affiliated companies in Houston Electric’s and CERC’s Consolidated Balance Sheets.

Houston Electric and CERC affiliate-related net interest income (expense) were as follows:

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric			CERC
	(in millions)
Interest income (expense), net (1)	$	1	$	—	$	2	$	—	$	(4	)	$	—

(1) Interest income is included in Other, net and interest expense is included in Interest and other finance charges on Houston Electric’s and CERC’s respective Statements of Consolidated Income.

CenterPoint Energy provides some corporate services to Houston Electric and CERC. The costs of services have been charged directly to Houston Electric and CERC using methods that management believes are reasonable. These methods include negotiated usage rates, dedicated asset assignment and proportionate corporate formulas based on operating expenses, assets, gross margin, employees and a composite of assets, gross margin and employees. Houston Electric provides certain services to CERC. These services are billed at actual cost, either directly or as an allocation and include fleet services, shop services, geographic services, surveying and right-of-way services, radio communications, data circuit management and field operations. Additionally, CERC provides certain services to Houston Electric. These services are billed at actual cost, either directly or as an allocation and include line locating and other miscellaneous services. These charges are not necessarily indicative of what would have been incurred had Houston Electric and CERC not been affiliates.

Amounts charged for these services were as follows and are included primarily in operation and maintenance expenses:

	Year Ended December 31,
	2018					2017					2016
	Houston Electric			CERC		Houston Electric			CERC		Houston Electric			CERC
	(in millions)
Corporate service charges	$	190		$	147	$	188		$	128	$	179		$	125
Net affiliate service charges (billings)	(17		)	17		(9		)	9		(8		)	8

The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding.

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric		CERC
	(in millions)
Cash dividends paid to parent	$	209	$	360	$	180	$	601	$	135	$	643
Cash contribution from parent	200		960		—		38		374		72
Capital distribution to parent associated with the Internal Spin	—		1,473		—		—		—		—

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Subsequent Events

12 Months Ended

Dec. 31, 2018

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

Enable Distributions Declarations (CenterPoint Energy)

Equity Instrument	Declaration Date	Record Date	Payment Date	Per Unit Distribution		Expected Cash Distribution
						(in millions)
Common units	February 8, 2019	February 19, 2019	February 26, 2019	$	0.318	$	74
Enable Series A Preferred Units	February 8, 2019	February 8, 2019	February 14, 2019	0.625		9

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Principles of Consolidation

Principles of Consolidation

The accounts of the Registrants and their wholly-owned and majority-owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation.

As of December 31, 2018, CenterPoint Energy and Houston Electric had VIEs consisting of the Bond Companies, which are consolidated. The consolidated VIEs are wholly-owned, bankruptcy remote special purpose entities that were formed solely for the purpose of securitizing transition and system restoration related property. Creditors of CenterPoint Energy and Houston Electric have no recourse to any assets or revenues of the Bond Companies. The bonds issued by these VIEs are payable only from and secured by transition and system restoration property and the bondholders have no recourse to the general credit of CenterPoint Energy or Houston Electric.

Equity and Investments without a Readily Determinable Fair Value (CenterPoint Energy and CERC)

Equity and Investments without a Readily Determinable Fair Value (CenterPoint Energy and CERC)

CenterPoint Energy and CERC generally use the equity method of accounting for investments in entities in which they have an ownership interest between 20% and 50% and exercise significant influence. CenterPoint Energy and CERC also use the equity method for investments in which they have ownership percentages greater than 50%, when they exercise significant influence, do not have control and are not considered the primary beneficiary, if applicable.

Under the equity method, CenterPoint Energy and CERC adjust their investments each period for contributions made, distributions received, respective shares of comprehensive income and amortization of basis differences, as appropriate. CenterPoint Energy and CERC evaluate their equity method investments for impairment when events or changes in circumstances indicate there is a loss in value of the investment that is other than a temporary decline.

CenterPoint Energy and CERC consider distributions received from equity method investments which do not exceed cumulative equity in earnings subsequent to the date of investment to be a return on investment and classify these distributions as operating activities in their respective Statements of Consolidated Cash Flows. CenterPoint Energy and CERC consider distributions received from equity method investments in excess of cumulative equity in earnings subsequent to the date of investment to be a return of investment and classify these distributions as investing activities in their respective Statements of Consolidated Cash Flows.

On September 4, 2018, CERC completed the Internal Spin of its equity investment in Enable and Enable GP. For further information regarding the Internal Spin, see Note 11.

Investments without a readily determinable fair value will be measured at cost, less impairment, plus or minus observable prices changes of an identical or similar investment of the same issuer.

Revenues

Revenues

The Registrants record revenue for electricity delivery and natural gas sales and services under the accrual method and these revenues are recognized upon delivery to customers. Electricity deliveries not billed by month-end are accrued based on actual AMS data, daily supply volumes and applicable rates. Natural gas sales not billed by month-end are accrued based upon estimated purchased gas volumes, estimated lost and unaccounted for gas and currently effective tariff rates. For further discussion, see Note 5.

Long-lived Assets and Intangibles Subject to Amortization

Long-lived Assets and Intangibles Subject to Amortization

The Registrants record property, plant and equipment at historical cost and expense repair and maintenance costs as incurred.

The Registrants periodically evaluate long-lived assets, including property, plant and equipment, and specifically identifiable intangibles subject to amortization, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets compared to the carrying value of the assets.

Regulatory Assets and Liabilities

Regulatory Assets and Liabilities

The Registrants apply the guidance for accounting for regulated operations to the Electric Transmission & Distribution reportable segment and the Natural Gas Distribution reportable segment. The Registrants’ rate-regulated subsidiaries may collect revenues subject to refund pending final determination in rate proceedings. In connection with such revenues, estimated rate refund liabilities are recorded which reflect management’s current judgment of the ultimate outcomes of the proceedings.

The Registrants’ rate-regulated businesses recognize removal costs as a component of depreciation expense in accordance with regulatory treatment. In addition, a portion of the amount of removal costs collected from customers that relate to AROs has been reclassified from a regulatory liability to an asset retirement liability in accordance with accounting guidance for AROs.

For further detail on the Registrants’ regulatory assets and liabilities, see Note 7.

Depreciation and Amortization Expense

Depreciation and Amortization Expense

The Registrants compute depreciation and amortization using the straight-line method based on economic lives or regulatory-mandated recovery periods. Amortization expense includes amortization of certain regulatory assets and other intangibles.

Capitalization of Interest and AFUDC

Capitalization of Interest and AFUDC

The Registrants capitalize interest and AFUDC as a component of projects under construction and amortize over the assets’ estimated useful lives once the assets are placed in service. AFUDC represents the composite interest cost of borrowed funds and a reasonable return on the equity funds used for construction for subsidiaries that apply the guidance for accounting for regulated operations. Although AFUDC increases both utility plant and earnings, it is realized in cash when the assets are included in rates.

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Interest and AFUDC debt (1)	$	8	$	6	$	2	$	9	$	6	$	2	$	8	$	6	$	2
AFUDC equity (2)	12		10		2		11		10		1		7		6		1

(1) Included in Interest and other finance charges on the Registrants’ respective Statements of Consolidated Income.

(2) Included in Other Income (Expense) on the Registrants’ respective Statements of Consolidated Income.

Income Taxes

Income Taxes

Houston Electric and CERC are included in CenterPoint Energy’s U.S. federal consolidated income tax return. Houston Electric and CERC report their income tax provision on a separate entity basis pursuant to a tax sharing agreement with CenterPoint Energy.  Current federal and certain state income taxes are payable to or receivable from CenterPoint Energy.

The Registrants use the asset and liability method of accounting for deferred income taxes. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is established against deferred tax assets for which management believes realization is not considered to be more likely than not. The Registrants recognize interest and penalties as a component of income tax expense (benefit), as applicable, in their respective Statements of Consolidated Income. CenterPoint Energy reports the income tax provision associated with its interest in Enable in income tax expense (benefit) in its Statements of Consolidated Income.

On December 22, 2017, President Trump signed into law comprehensive tax reform legislation informally called the Tax Cuts and Jobs Acts, or TCJA, which resulted in significant changes to federal tax laws effective January 1, 2018. See Note 15 for further discussion of the impacts of tax reform implementation.

To the extent certain EDIT of the Registrants’ rate-regulated subsidiaries may be recoverable or payable through future rates, regulatory assets and liabilities have been recorded, respectively.

The Registrants use the portfolio approach to recognize income tax effects on other comprehensive income from accumulated other comprehensive income.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount and do not bear interest. Management reviews the outstanding accounts receivable, as well as the bad debt write-offs experienced in the past, and establishes an allowance for doubtful accounts. Account balances are charged off against the allowance when management determines it is probable the receivable will not be recovered.

The table below summarizes the Registrants’ provision for doubtful accounts for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Provision for doubtful accounts	$	16	$	—	$	16	$	14	$	1	$	13	$	7	$	—	$	7

Inventory

Inventory

The Registrants’ inventory consists principally of materials and supplies and, for CERC, natural gas. Materials and supplies are valued at the lower of average cost or market.  Materials and supplies are recorded to inventory when purchased and subsequently charged to expense or capitalized to plant when installed. Natural gas inventories of CERC’s Energy Services business segment at locations qualifying for and utilizing the fair value hedge accounting election are valued at fair value; inventories at locations not qualifying for or not utilizing the fair value hedge accounting election are valued at the lower of average cost or market. During 2018, 2017 and 2016, CERC recorded write-downs of natural gas inventory to the lower of average cost or market which are disclosed on the respective Statements of Consolidated Cash Flows.

Derivative Instruments

Derivative Instruments

The Registrants are exposed to various market risks. These risks arise from transactions entered into in the normal course of business.  The Registrants utilize derivative instruments such as physical forward contracts, swaps and options to mitigate the impact of changes in commodity prices, weather and interest rates on operating results and cash flows. Such derivatives are recognized in the Registrants’ Consolidated Balance Sheets at their fair value unless the Registrant elects the normal purchase and sales exemption for qualified physical transactions. A derivative may be designated as a normal purchase or normal sale if the intent is to physically receive or deliver the product for use or sale in the normal course of business.

CenterPoint Energy has a Risk Oversight Committee composed of corporate and reportable segment officers that oversees commodity price, weather and credit risk activities, including the Registrants’ marketing, risk management services and hedging activities. The committee’s duties are to establish the Registrants’ commodity risk policies, allocate board-approved commercial risk limits, approve the use of new products and commodities, monitor positions and ensure compliance with the Registrants’ risk management policies and procedures and limits established by CenterPoint Energy’s Board of Directors.

The Registrants’ policies prohibit the use of leveraged financial instruments. A leveraged financial instrument, for this purpose, is a transaction involving a derivative whose financial impact will be based on an amount other than the notional amount or volume of the instrument.

Investments in Equity Securities (CenterPoint Energy and CERC)

Investments in Equity Securities (CenterPoint Energy and CERC)

CenterPoint Energy and CERC report equity securities at estimated fair value in their respective Consolidated Balance Sheets, and any unrealized holding gains and losses are recorded as Other Income (Expense) in their respective Statements of Consolidated Income.

Environmental Costs

Environmental Costs

The Registrants expense or capitalize environmental expenditures, as appropriate, depending on their future economic benefit. The Registrants expense amounts that relate to an existing condition caused by past operations that do not have future economic benefit. The Registrants record undiscounted liabilities related to these future costs when environmental assessments and/or remediation activities are probable and the costs can be reasonably estimated.

Cash and Cash Equivalents and Restricted Cash

Cash and Cash Equivalents and Restricted Cash

For purposes of reporting cash flows, the Registrants consider cash equivalents to be short-term, highly-liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents held by the Bond Companies (VIEs) solely to support servicing the Securitization Bonds as of December 31, 2018 and 2017 are reflected on CenterPoint Energy’s and Houston Electric’s Consolidated Balance Sheets.

In connection with the issuance of Securitization Bonds, CenterPoint Energy and Houston Electric were required to establish restricted cash accounts to collateralize the bonds that were issued in these financing transactions. These restricted cash accounts are not available for withdrawal until the maturity of the bonds and are not included in cash and cash equivalents. For more information on restricted cash see Note 20.

Preferred Stock Dividends

Preferred Stock and Dividends

Preferred stock is evaluated to determine balance sheet classification, and all conversion and redemption features are evaluated for bifurcation treatment. Proceeds received net of issuance costs are recognized on the settlement date. Cash dividends become a liability once declared. Income available to common stockholders is computed by deducting from net income the dividends accumulated and earned during the period on cumulative preferred stock.

Purchase Accounting

Purchase Accounting

The Registrants evaluate acquisitions to determine when a set of acquired activities and assets represent a business.  When control of a business is obtained, the Registrants apply the acquisition method of accounting and record the assets acquired, liabilities assumed and any non-controlling interest obtained based on fair value at the acquisition date. The excess of the fair value of purchase consideration over the fair value of the net assets acquired is recorded as goodwill. The results of operations of the acquired business are included in the Registrants’ respective Statements of Consolidated Income beginning on the date of the acquisition.

New Accounting Pronouncements

New Accounting Pronouncements

The following table provides an overview of recently adopted or issued accounting pronouncements applicable to all the Registrants, unless otherwise noted.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2014-09- Revenue from Contracts with Customers (Topic 606) and related amendments	This standard provides a comprehensive new revenue recognition model that requires revenue to be recognized in a manner that depicts the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. Transition method: modified retrospective	January 1, 2018	Note 5 addresses the disclosure requirements. Adoption of the standard did not result in significant changes to revenue recognition. A substantial amount of the Registrants’ revenues are tariff and/or derivative based, which were not significantly impacted by these ASUs.
ASU 2017-05- Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets	This standard clarifies when and how to apply ASC 610-20, which was issued as part of ASU 2014-09. It amends or supersedes the guidance in ASC 350 and ASC 360 on determining a gain or loss recognized upon the derecognition of nonfinancial assets. This standard also eliminates industry specific guidance, including ASC 360-20 Property, Plant, and Equipment - Real Estate Sales, for the recognition of gains or losses upon the sale of in-substance real estate. Transition method: modified retrospective	January 1, 2018	CenterPoint Energy and CERC elected to apply the practical expedient upon adoption to only evaluate transactions that were not determined to be complete as of the date of adoption. Subsequent to adoption, gains or losses on sales or dilution events in CenterPoint Energy’s investment in Enable may result in gains or losses recognized in earnings.
ASU 2016-01-Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2018-03-Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This standard requires equity investments that do not result in consolidation and are not accounted for under the equity method to be measured at fair value and to recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. It does not change the guidance for classifying and measuring investments in debt securities and loans. It also changes certain disclosure requirements and other aspects related to recognition and measurement of financial assets and financial liabilities. Transition method: cumulative-effect adjustment to beginning retained earnings, and two features prospective	January 1, 2018	The adoption of this standard did not have an impact on the Registrants’ financial position, results of operations or cash flows. The Registrants elected the practicability exception for investments without a readily determinable fair value to be measured at cost. This includes the Enable Series A Preferred Units owned by CenterPoint Energy, which were previously accounted for under the cost method. See Note 11 for further discussion.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2016-15- Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This standard provides clarifying guidance on the classification of certain cash receipts and payments in the statement of cash flows and eliminates the variation in practice related to such classifications. Transition method:retrospective	January 1, 2018	The adoption did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, CenterPoint Energy’s and Houston Electric’s Statements of Consolidated Cash Flows reflect an increase in investing activities and a corresponding decrease in operating activities of $2 million, $4 million and $8 million for the years ended December 31, 2018, 2017 and 2016, respectively, due to the requirement that cash proceeds from COLI policies be classified as cash inflows from investing activity.
ASU 2016-18- Statement of Cash Flows (Topic 230): Restricted Cash	This standard requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, restricted cash and restricted cash equivalents. As a result, the statement of cash flows will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents. When cash, cash equivalents, restricted cash and restricted cash equivalents are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. Transition method: retrospective	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, the Registrants’ respective Statements of Consolidated Cash Flows are reconciled to cash, cash equivalents and restricted cash, resulting in a decrease in investing activities of $11 million for each of CenterPoint Energy’s and CERC’s respective Statements of Consolidated Cash Flows for the year ended December 31, 2018. In addition, each of CenterPoint Energy and Houston Electric showed a decrease of $4 million and an increase of $5 million in investing activities for the years ended December 31, 2017 and 2016, respectively, in their respective Statements of Consolidated Cash Flows. See Note 20 for further discussion.
ASU 2017-07- Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This standard requires an employer to report the service cost component of the net periodic pension cost and postretirement benefit cost in the same line item(s) as other employee compensation costs arising from services rendered during the period; all other components will be presented separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. Transition method: retrospective for the presentation of the service cost component and other components; prospective for the capitalization of the service cost component	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations, cash flows or disclosures; however, it resulted in the increases to operating income and corresponding decreases to other income reported in the table below. Other components of net periodic costs previously capitalized in assets are recorded as regulatory assets by the Registrants’ rate-regulated businesses prospectively from date of adoption.
ASU 2017-12- Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This standard, including standards amending this standard, expands an entity’s ability to hedge and account for risk components, reduces the complexity of applying certain aspects of hedge accounting and updates the presentation and disclosure requirements. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness. Transition method: cumulative-effect adjustment for elimination of the separate measurement of ineffectiveness; prospective for presentation and disclosure	July 1, 2018 Applicable January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows. As a result of the adoption, the Registrants will no longer recognize ineffectiveness for derivatives designated as cash flow hedges; all changes in fair value will flow through other comprehensive income. As the Registrants did not have existing cash flow hedges as of the initial application date and the adoption date, no cumulative effective adjustment was recorded. Note 9 reflects disclosures modified upon adoption.
ASU 2018-02-Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA and requires entities to provide certain disclosures regarding stranded tax effects. Transition method: in the period of adoption	October 1, 2018	The adoption of this standard did not impact the Registrants’ results of operations or cash flows. As a result of the adoption, CenterPoint Energy and CERC elected to reclassify a stranded tax benefit of $15 million and $1 million, respectively, primarily related to benefit plans, from accumulated other comprehensive loss and income to Retained earnings on their respective Consolidated Balance Sheets. The reclassification only encompasses the change in the federal corporate income tax rate due to the TCJA.
ASU 2018-13- Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement	This standard eliminates, modifies and adds certain disclosure requirements for fair value measurements. Transition method: prospective for additions and one modification and retrospective for all other amendments	Adoption of eliminations and modifications as of September 30, 2018; Additions will be adopted January 1, 2020	The adoption of this standard did not impact the Registrants’ financial position, results of operations or cash flows. Note 10 reflects the disclosures modified upon adoption.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2018-14-Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans	This standard eliminates, modifies and adds certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Transition method: retrospective	October 1, 2018	The adoption of this standard did not impact the Registrants’ financial position, results of operations, and cash flows. Note 8 reflects the disclosures modified upon adoption.

The table below reflects the impact of adoption of ASU 2017-07 (Compensation—Retirement Benefits (Topic 715)) on each of the Registrants’ respective Statements of Consolidated Income:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Increase to operating income	$	47	$	21	$	11	$	64	$	26	$	23	$	64	$	25	$	23
Decrease to other income	47		21		11		64		26		23		64		25		23

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2016-02- Leases (Topic 842) and related amendments ASU 2018-01- Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842 ASU 2018-10 - Codification Improvements to Topic 842, Leases ASU 2018-11- Leases (Topic 842)-Targeted Improvements ASU 2018-20- Leases (Topic 842)-Narrow-Scope Improvements for Lessors	ASU 2016-02 provides a comprehensive new lease model that requires lessees to recognize assets and liabilities for most leases and would change certain aspects of lessor accounting. Transition method: modified retrospective ASU 2018-01 allows entities to elect not to assess whether existing land easements that were not previously accounted for in accordance with ASC 840 Leases under ASC 842 Leases when transitioning to the new leasing standard. ASU 2018-10 makes sixteen narrow-scope amendments to ASC 842 Leases. ASU 2018-11 allows entities the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption. It also gives lessors the practical expedient to not separate non-lease and lease components when certain criteria are met. ASU 2018-20 updates several narrow-scope changes for lessors, including sales taxes collected from lessees, lessor costs paid directly by lessees, and recognition of variable payments for contracts with lease and non-lease components.	January 1, 2019 Early adoption is permitted	The Registrants have completed the identification of leases under the revised definition. In addition to expanded disclosure for lessees and lessors, which will include qualitative disclosures of the nature of the lease population and additional quantitative information, the Registrants expect to recognize approximately $30 million, $1 million and $28 million of right-of-use assets and lease liabilities on the statements of financial position of CenterPoint Energy, Houston Electric and CERC, respectively, on the date of adoption but do not expect a material impact on their results of operations and cash flows.    The Registrants elected the practical expedient for existing easements provided by ASU 2018-01, and the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption provided by ASU 2018-11.
ASU 2016-13- Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This standard, including standards amending this standard, requires a new model called CECL to estimate credit losses for (1) financial assets subject to credit losses and measured at amortized cost and (2) certain off-balance sheet credit exposures. Upon initial recognition of the exposure, the CECL model requires an entity to estimate the credit losses expected over the life of an exposure based on historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Transition method: modified retrospective	January 1, 2020 Early adoption is permitted starting January 1, 2019	The Registrants are currently assessing the impact that this standard will have on their financial position, results of operations, cash flows and disclosures.

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2018-15- Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	This standard aligns accounting for implementation costs incurred in a cloud computing arrangement that is accounted for as a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The update also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. Transition method: retrospective or prospective	January 1, 2020 Early adoption is permitted	The adoption of this standard will allow the Registrants to capitalize certain implementation costs incurred in cloud computing arrangements that are accounted for as service contracts. The Registrants are currently assessing the impact that adoption of this standard will have on their financial position, results of operations, cash flows and disclosures.

Management believes that other recently adopted standards and recently issued standards that are not yet effective will not have a material impact on the Registrants’ financial position, results of operations or cash flows upon adoption.

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Public Utilities General Disclosures [Table Text Block]

The Registrants capitalize interest and AFUDC as a component of projects under construction and amortize over the assets’ estimated useful lives once the assets are placed in service. AFUDC represents the composite interest cost of borrowed funds and a reasonable return on the equity funds used for construction for subsidiaries that apply the guidance for accounting for regulated operations. Although AFUDC increases both utility plant and earnings, it is realized in cash when the assets are included in rates.

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Interest and AFUDC debt (1)	$	8	$	6	$	2	$	9	$	6	$	2	$	8	$	6	$	2
AFUDC equity (2)	12		10		2		11		10		1		7		6		1

(1) Included in Interest and other finance charges on the Registrants’ respective Statements of Consolidated Income.

(2) Included in Other Income (Expense) on the Registrants’ respective Statements of Consolidated Income.

Provision for doubtful accounts [Table Text Block]

The table below summarizes the Registrants’ provision for doubtful accounts for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Provision for doubtful accounts	$	16	$	—	$	16	$	14	$	1	$	13	$	7	$	—	$	7

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

The following table provides an overview of recently adopted or issued accounting pronouncements applicable to all the Registrants, unless otherwise noted.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2014-09- Revenue from Contracts with Customers (Topic 606) and related amendments	This standard provides a comprehensive new revenue recognition model that requires revenue to be recognized in a manner that depicts the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. Transition method: modified retrospective	January 1, 2018	Note 5 addresses the disclosure requirements. Adoption of the standard did not result in significant changes to revenue recognition. A substantial amount of the Registrants’ revenues are tariff and/or derivative based, which were not significantly impacted by these ASUs.
ASU 2017-05- Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets	This standard clarifies when and how to apply ASC 610-20, which was issued as part of ASU 2014-09. It amends or supersedes the guidance in ASC 350 and ASC 360 on determining a gain or loss recognized upon the derecognition of nonfinancial assets. This standard also eliminates industry specific guidance, including ASC 360-20 Property, Plant, and Equipment - Real Estate Sales, for the recognition of gains or losses upon the sale of in-substance real estate. Transition method: modified retrospective	January 1, 2018	CenterPoint Energy and CERC elected to apply the practical expedient upon adoption to only evaluate transactions that were not determined to be complete as of the date of adoption. Subsequent to adoption, gains or losses on sales or dilution events in CenterPoint Energy’s investment in Enable may result in gains or losses recognized in earnings.
ASU 2016-01-Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2018-03-Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This standard requires equity investments that do not result in consolidation and are not accounted for under the equity method to be measured at fair value and to recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. It does not change the guidance for classifying and measuring investments in debt securities and loans. It also changes certain disclosure requirements and other aspects related to recognition and measurement of financial assets and financial liabilities. Transition method: cumulative-effect adjustment to beginning retained earnings, and two features prospective	January 1, 2018	The adoption of this standard did not have an impact on the Registrants’ financial position, results of operations or cash flows. The Registrants elected the practicability exception for investments without a readily determinable fair value to be measured at cost. This includes the Enable Series A Preferred Units owned by CenterPoint Energy, which were previously accounted for under the cost method. See Note 11 for further discussion.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2016-15- Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments	This standard provides clarifying guidance on the classification of certain cash receipts and payments in the statement of cash flows and eliminates the variation in practice related to such classifications. Transition method:retrospective	January 1, 2018	The adoption did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, CenterPoint Energy’s and Houston Electric’s Statements of Consolidated Cash Flows reflect an increase in investing activities and a corresponding decrease in operating activities of $2 million, $4 million and $8 million for the years ended December 31, 2018, 2017 and 2016, respectively, due to the requirement that cash proceeds from COLI policies be classified as cash inflows from investing activity.
ASU 2016-18- Statement of Cash Flows (Topic 230): Restricted Cash	This standard requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, restricted cash and restricted cash equivalents. As a result, the statement of cash flows will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents. When cash, cash equivalents, restricted cash and restricted cash equivalents are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. Transition method: retrospective	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or disclosures. However, the Registrants’ respective Statements of Consolidated Cash Flows are reconciled to cash, cash equivalents and restricted cash, resulting in a decrease in investing activities of $11 million for each of CenterPoint Energy’s and CERC’s respective Statements of Consolidated Cash Flows for the year ended December 31, 2018. In addition, each of CenterPoint Energy and Houston Electric showed a decrease of $4 million and an increase of $5 million in investing activities for the years ended December 31, 2017 and 2016, respectively, in their respective Statements of Consolidated Cash Flows. See Note 20 for further discussion.
ASU 2017-07- Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This standard requires an employer to report the service cost component of the net periodic pension cost and postretirement benefit cost in the same line item(s) as other employee compensation costs arising from services rendered during the period; all other components will be presented separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. Transition method: retrospective for the presentation of the service cost component and other components; prospective for the capitalization of the service cost component	January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations, cash flows or disclosures; however, it resulted in the increases to operating income and corresponding decreases to other income reported in the table below. Other components of net periodic costs previously capitalized in assets are recorded as regulatory assets by the Registrants’ rate-regulated businesses prospectively from date of adoption.
ASU 2017-12- Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This standard, including standards amending this standard, expands an entity’s ability to hedge and account for risk components, reduces the complexity of applying certain aspects of hedge accounting and updates the presentation and disclosure requirements. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness. Transition method: cumulative-effect adjustment for elimination of the separate measurement of ineffectiveness; prospective for presentation and disclosure	July 1, 2018 Applicable January 1, 2018	The adoption of this standard did not have a material impact on the Registrants’ financial position, results of operations or cash flows. As a result of the adoption, the Registrants will no longer recognize ineffectiveness for derivatives designated as cash flow hedges; all changes in fair value will flow through other comprehensive income. As the Registrants did not have existing cash flow hedges as of the initial application date and the adoption date, no cumulative effective adjustment was recorded. Note 9 reflects disclosures modified upon adoption.
ASU 2018-02-Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA and requires entities to provide certain disclosures regarding stranded tax effects. Transition method: in the period of adoption	October 1, 2018	The adoption of this standard did not impact the Registrants’ results of operations or cash flows. As a result of the adoption, CenterPoint Energy and CERC elected to reclassify a stranded tax benefit of $15 million and $1 million, respectively, primarily related to benefit plans, from accumulated other comprehensive loss and income to Retained earnings on their respective Consolidated Balance Sheets. The reclassification only encompasses the change in the federal corporate income tax rate due to the TCJA.
ASU 2018-13- Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement	This standard eliminates, modifies and adds certain disclosure requirements for fair value measurements. Transition method: prospective for additions and one modification and retrospective for all other amendments	Adoption of eliminations and modifications as of September 30, 2018; Additions will be adopted January 1, 2020	The adoption of this standard did not impact the Registrants’ financial position, results of operations or cash flows. Note 10 reflects the disclosures modified upon adoption.

Recently Adopted Accounting Standards
ASU Number and Name	Description	Date of Adoption	Financial Statement Impact upon Adoption
ASU 2018-14-Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans	This standard eliminates, modifies and adds certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Transition method: retrospective	October 1, 2018	The adoption of this standard did not impact the Registrants’ financial position, results of operations, and cash flows. Note 8 reflects the disclosures modified upon adoption.

The table below reflects the impact of adoption of ASU 2017-07 (Compensation—Retirement Benefits (Topic 715)) on each of the Registrants’ respective Statements of Consolidated Income:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Increase to operating income	$	47	$	21	$	11	$	64	$	26	$	23	$	64	$	25	$	23
Decrease to other income	47		21		11		64		26		23		64		25		23

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2016-02- Leases (Topic 842) and related amendments ASU 2018-01- Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842 ASU 2018-10 - Codification Improvements to Topic 842, Leases ASU 2018-11- Leases (Topic 842)-Targeted Improvements ASU 2018-20- Leases (Topic 842)-Narrow-Scope Improvements for Lessors	ASU 2016-02 provides a comprehensive new lease model that requires lessees to recognize assets and liabilities for most leases and would change certain aspects of lessor accounting. Transition method: modified retrospective ASU 2018-01 allows entities to elect not to assess whether existing land easements that were not previously accounted for in accordance with ASC 840 Leases under ASC 842 Leases when transitioning to the new leasing standard. ASU 2018-10 makes sixteen narrow-scope amendments to ASC 842 Leases. ASU 2018-11 allows entities the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption. It also gives lessors the practical expedient to not separate non-lease and lease components when certain criteria are met. ASU 2018-20 updates several narrow-scope changes for lessors, including sales taxes collected from lessees, lessor costs paid directly by lessees, and recognition of variable payments for contracts with lease and non-lease components.	January 1, 2019 Early adoption is permitted	The Registrants have completed the identification of leases under the revised definition. In addition to expanded disclosure for lessees and lessors, which will include qualitative disclosures of the nature of the lease population and additional quantitative information, the Registrants expect to recognize approximately $30 million, $1 million and $28 million of right-of-use assets and lease liabilities on the statements of financial position of CenterPoint Energy, Houston Electric and CERC, respectively, on the date of adoption but do not expect a material impact on their results of operations and cash flows.    The Registrants elected the practical expedient for existing easements provided by ASU 2018-01, and the transition option to not apply the new lease standards in the comparative financial statements presented in the year of adoption provided by ASU 2018-11.
ASU 2016-13- Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This standard, including standards amending this standard, requires a new model called CECL to estimate credit losses for (1) financial assets subject to credit losses and measured at amortized cost and (2) certain off-balance sheet credit exposures. Upon initial recognition of the exposure, the CECL model requires an entity to estimate the credit losses expected over the life of an exposure based on historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Transition method: modified retrospective	January 1, 2020 Early adoption is permitted starting January 1, 2019	The Registrants are currently assessing the impact that this standard will have on their financial position, results of operations, cash flows and disclosures.

Issued, Not Yet Effective Accounting Standards
ASU Number and Name	Description	Effective Date	Financial Statement Impact upon Adoption
ASU 2018-15- Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract	This standard aligns accounting for implementation costs incurred in a cloud computing arrangement that is accounted for as a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The update also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. Transition method: retrospective or prospective	January 1, 2020 Early adoption is permitted	The adoption of this standard will allow the Registrants to capitalize certain implementation costs incurred in cloud computing arrangements that are accounted for as service contracts. The Registrants are currently assessing the impact that adoption of this standard will have on their financial position, results of operations, cash flows and disclosures.

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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment [Table Text Block]

Property, plant and equipment includes the following:

		December 31, 2018						December 31, 2017
	Weighted Average Useful Lives	Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net		Property, Plant and Equipment, Gross		Accumulated Depreciation & Amortization		Property, Plant and Equipment, Net
CenterPoint Energy	(in years)	(in millions)
Electric Transmission & Distribution	35	$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
Natural Gas Distribution	28	7,257		2,128		5,129		6,735		1,968		4,767
Energy Services	27	121		43		78		102		35		67
Other property	26	741		306		435		698		338		360
Total		$	20,267	$	6,223	$	14,044	$	19,031	$	5,974	$	13,057
Houston Electric
Electric Transmission	45	$	3,077	$	650	$	2,427	$	2,767	$	620	$	2,147
Electric Distribution	33	7,524		2,553		4,971		7,178		2,522		4,656
Other transmission & distribution property	18	1,547		543		1,004		1,551		491		1,060
Total		$	12,148	$	3,746	$	8,402	$	11,496	$	3,633	$	7,863
CERC
Natural Gas Distribution	28	$	7,257	$	2,128	$	5,129	$	6,735	$	1,968	$	4,767
Energy Services	27	121		43		78		102		35		67
Other property	23	53		34		19		51		33		18
Total		$	7,431	$	2,205	$	5,226	$	6,888	$	2,036	$	4,852

Depreciation and Amortization [Table Text Block]

The following table presents depreciation and amortization expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Depreciation	$	626	$	342	$	264	$	619	$	354	$	243	$	607	$	349	$	230
Amortization of securitized regulatory assets	531		531		—		329		329		—		455		455		—
Other amortization	86		44		29		88		41		36		64		34		19
Total	$	1,243	$	917	$	293	$	1,036	$	724	$	279	$	1,126	$	838	$	249

Asset Retirement Obligation [Table Text Block]

A reconciliation of the changes in the ARO liability recorded in Other non-current liabilities on each of the Registrants’ respective Consolidated Balance Sheets is as follows:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy		Houston Electric		CERC
	(in millions)
Beginning balance	$	281		$	35		$	243		$	205	$	33	$	169
Accretion expense (1)	10			1			9			8		1		7
Revisions in estimates (2)	(33		)	(2		)	(31		)	68		1		67
Ending balance	$	258		$	34		$	221		$	281	$	35	$	243

(1) Reflected in Regulatory assets on each of the Registrants’ respective Consolidated Balance Sheets.

(2) In 2018, CenterPoint Energy and CERC reflected a decrease in their respective ARO liability which is primarily attributable to increases in the long-term interest rates used for discounting in the ARO calculation. In 2017, CenterPoint Energy and CERC reflected an increase in their respective ARO liability which is primarily attributable to decreases in the long-term interest rates used for discounting in the ARO calculation.

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Mergers and Acquisitions (Tables)

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

The fair value of the identifiable intangible assets and related useful lives included in the final purchase price allocation is as follows:

	Fair Value		Useful Life
	(in millions)		(in years)
Customer relationships	$	25	15

Business Acquisition, Pro Forma Information [Table Text Block]

The following unaudited pro forma financial information reflects the consolidated results of operations of CenterPoint Energy and CERC, assuming the AEM acquisition had taken place on January 1, 2016. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved had the acquisition taken place on the dates indicated or the future consolidated results of operations of the combined companies.

	Year Ended December 31,
	2017				2016
	CenterPoint Energy		CERC		CenterPoint Energy		CERC
	(in millions)
Revenues	$	9,614	$	6,603	$	8,541	$	5,467
Net Income (1)	1,792		745		442		255

(1) Net income for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million and $396 million due to the TCJA for CenterPoint Energy and CERC, respectively. See Note 15 for further discussion of the impacts of tax reform implementation.

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Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following tables disaggregate revenues by reportable segment and major source:

	Year Ended December 31, 2018
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,235		$	3,011		$	493		$	6	$	6,745		$	3,235		$	3,011		$	493		$	1	$	3,505
Derivatives income	(2		)	(2		)	4,028			—		4,024			—			(2		)	4,028			—		4,026
Other (3)	(1		)	(42		)	—			9		(34		)	(1		)	(42		)	—			—		(42		)
Eliminations	—			(36		)	(110		)	—		(146		)	—			(36		)	(110		)	—		(146		)
Total revenues	$	3,232		$	2,931		$	4,411		$	15	$	10,589		$	3,234		$	2,931		$	4,411		$	1	$	7,343
	Year Ended December 31, 2017
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,001		$	2,638		$	480		$	5	$	6,124		$	3,001		$	2,638		$	480		$	—	$	3,118
Derivatives income	(1		)	—			3,569			—		3,568			—			—			3,569			—		3,569
Other (3)	(3		)	1			—			9		7			(3		)	1			—			—		1
Eliminations	—			(33		)	(52		)	—		(85		)	—			(33		)	(52		)	—		(85		)
Total revenues	$	2,997		$	2,606		$	3,997		$	14	$	9,614		$	2,998		$	2,606		$	3,997		$	—	$	6,603
	Year Ended December 31, 2016
	CenterPoint Energy														Houston Electric			CERC
	Electric Transmission & Distribution (1)			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total			Total			Natural Gas Distribution (1)			Energy  Services  (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	3,050		$	2,368		$	288		$	5	$	5,711		$	3,050		$	2,368		$	288		$	—	$	2,656
Derivatives income	1			—			1,811			—		1,812			—			—			1,811			—		1,811
Other (3)	9			41			—			10		60			9			41			—			1		42
Eliminations	—			(29		)	(26		)	—		(55		)	—			(29		)	(26		)	—		(55		)
Total revenues	$	3,060		$	2,380		$	2,073		$	15	$	7,528		$	3,059		$	2,380		$	2,073		$	1	$	4,454

(1) Reflected in Utility revenues in the Statements of Consolidated Income.

(2) Reflected in Non-utility revenues in the Statements of Consolidated Income.

(3) Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

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Goodwill and Other Intangibles (CenterPoint Energy and CERC) (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Reportable Segments [Table Text Block]

CenterPoint Energy’s and CERC’s goodwill by reportable segment as of both December 31, 2018 and 2017 is as follows:

	(in millions)
Natural Gas Distribution	$	746
Energy Services (1)	110
Other Operations	11
Total	$	867

(1) Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The tables below present information on CenterPoint Energy’s and CERC’s finite lived intangible assets recorded in Other non-current assets on the Consolidated Balance Sheets. Finite lived intangible assets are amortized over their estimated useful lives.

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
	(in millions)
Customer relationships	$	86	$	(27	)	$	59	$	86	$	(21	)	$	65
Covenants not to compete	4		(3		)	1		4		(2		)	2
Other	16		(11		)	5		15		(8		)	7
Total	$	106	$	(41	)	$	65	$	105	$	(31	)	$	74

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Amortization expense of intangible assets (1)	$	10	$	13	$	4

(1) Recorded in Depreciation and amortization expenses on CenterPoint Energy’s and CERC’s respective Statements of Consolidated Income.

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

CenterPoint Energy and CERC estimate that amortization expense of intangible assets with finite lives for the next five years will be as follows:

	Amortization Expense
	(in millions)
2019	$	11
2020	6
2021	6
2022	6
2023	5

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Regulatory Accounting (Tables)

12 Months Ended

Dec. 31, 2018

Regulated Operations [Abstract]

Schedule of Regulatory Assets and Liabilities [Table Text Block]

The following is a list of regulatory assets and liabilities reflected on the Registrants’ respective Consolidated Balance Sheets as of December 31, 2018 and 2017:

	December 31, 2018									December 31, 2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Regulatory Assets:
Current regulatory assets (1)	$	77		$	—		$	77		$	130		$	—		$	130
Non-current regulatory assets:
Securitized regulatory assets	1,059			1,059			—			1,590			1,590			—
Unrecognized equity return (2)	(213		)	(213		)	—			(287		)	(287		)	—
Unamortized loss on reacquired debt	68			68			—			75			75			—
Pension and postretirement-related regulatory asset (3)	725			33			30			646			31			20
Hurricane Harvey restoration costs (4)	68			64			4			64			58			6
Regulatory assets related to TCJA (5)	33			23			10			48			33			15
Other long-term regulatory assets (6)	227			90			137			211			70			140
Total non-current regulatory assets	1,967			1,124			181			2,347			1,570			181
Total regulatory assets	2,044			1,124			258			2,477			1,570			311
Regulatory Liabilities:
Current regulatory liabilities (7)	38			17			21			24			22			2
Non-current regulatory liabilities:
Regulatory liabilities related to TCJA (5)	1,323			847			476			1,354			862			492
Estimated removal costs	886			269			617			878			285			593
Other long-term regulatory liabilities	316			182			134			232			116			116
Total non-current regulatory liabilities	2,525			1,298			1,227			2,464			1,263			1,201
Total regulatory liabilities	2,563			1,315			1,248			2,488			1,285			1,203
Total regulatory assets and liabilities, net	$	(519	)	$	(191	)	$	(990	)	$	(11	)	$	285		$	(892	)

(1) Current regulatory assets are included in Prepaid expenses and other current assets in the Registrants’ respective Consolidated Balance Sheets.

(2) The unrecognized equity return will be recognized as it is recovered in rates through 2024. During the years ended December 31, 2018, 2017 and 2016, Houston Electric recognized approximately $74 million, $42 million and $64 million, respectively, of the allowed equity return. The timing of Houston Electric’s recognition of the equity return will vary each period based on amounts actually collected during the period. The actual amounts recognized are adjusted at least annually to correct any over-collections or under-collections during the preceding 12 months.

(3) Includes a portion of Houston Electric’s and CERC’s NGD’s actuarially determined pension and other postemployment expense in excess of the amount being recovered through rates that is being deferred for rate making purposes, of which $33 million and $4 million as of December 31, 2018, respectively, and $31 million and $7 million as of December 31, 2017, respectively, were not earning a return.

(4) The Registrants suffered damage as a result of Hurricane Harvey, a major storm classified as a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale, that first struck the Texas coast on Friday, August 25, 2017 and remained over the Houston area for the next several days. The unprecedented flooding from torrential amounts of rainfall accompanying the storm caused significant damage to or destruction of residences and businesses served by the Registrants. The Registrants deferred the uninsured storm restoration costs as management believed it was probable that such costs will be recovered through traditional rate adjustment mechanisms for capital costs and through the next base rate proceeding for operation and maintenance expenses. As a result, storm restoration costs did not materially affect the Registrants’ reported net income for 2017. The Registrants are not earning a return on Hurricane Harvey restoration costs.

(5) The EDIT and deferred revenues will be recovered or refunded to customers as required by tax and regulatory authorities. See Note 15 for additional information.

(6) Other long-term regulatory assets that are not earning a return were not material as of December 31, 2018 and 2017.

(7) Current regulatory liabilities are included in Other current liabilities in each of the Registrants’ respective Consolidated Balance Sheets.

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Stock-Based Incentive Compensation Plans and Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2018

Defined Benefit Plan Disclosure [Line Items]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

The following table summarizes CenterPoint Energy’s expenses related to LTIPs for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
LTIP Compensation expense (1)	$	26	$	21	$	19
Income tax benefit recognized	6		8		7
Actual tax benefit realized for tax deductions	5		6		5

(1) Included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income and not capitalized as a part of Inventory or Property, Plant and Equipment.

Share-Based Compensation, Activity [Table Text Block]

The following tables summarize CenterPoint Energy’s LTIP activity for 2018:

	Year Ended December 31, 2018
	Shares (Thousands)		Weighted-Average Grant Date Fair Value		Remaining Average Contractual Life (Years)	Aggregate Intrinsic Value (2) (Millions)
Performance Awards(1)
Outstanding and non-vested as of December 31, 2017	3,627		$	22.15
Granted	1,321		26.74
Forfeited or canceled	(721	)	21.72
Vested and released to participants	(409	)	21.31
Outstanding and non-vested as of December 31, 2018	3,818		$	23.91	1	$	57
Stock Awards
Outstanding and non-vested as of December 31, 2017	980		$	22.68
Granted	409		26.62
Forfeited or canceled	(29	)	25.31
Vested and released to participants	(300	)	22.84
Outstanding and non-vested as of December 31, 2018	1,060		$	24.08	1.1	$	30

(1) Reflects maximum performance achievement.

(2) Reflects the impact of current expectations of achievement and stock price.

Share-Based Compensation Arrangement By Award, Weighted Average Grant Date Fair Value, Grant Date Intrinsic Value, and Vested Grant Date Fair Value [Table Text Block]

The weighted average grant date fair values per unit of awards granted were as follows for 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
	(In millions, except for per unit amounts)
Performance Awards
Weighted-average grant date fair value per unit of awards granted	$	26.74	$	26.64	$	18.98
Total intrinsic value of awards received by participants	12		7		7
Vested grant date fair value	9		5		7
Stock Awards
Weighted-average grant date fair value per unit of awards granted	$	26.62	$	26.77	$	19.24
Total intrinsic value of awards received by participants	9		9		6
Vested grant date fair value	7		7		6

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Amounts recognized in accumulated other comprehensive loss (gain) consist of the following:

	December 31,
	2018								2017
	Pension Benefits		Postretirement Benefits						Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy			CERC			CenterPoint Energy		CenterPoint Energy			CERC
	(in millions)
Unrecognized actuarial loss (gain)	$	109	$	(7	)	$	(3	)	$	94	$	(8	)	$	(2	)
Unrecognized prior service cost	1		5			5			1		6			6
Deferred tax benefit (1)	—		—			(9		)	—		—			(11		)
Net amount recognized in accumulated other comprehensive loss (gain)	$	110	$	(2	)	$	(7	)	$	95	$	(2	)	$	(7	)

(1) CenterPoint Energy’s and CERC’s postretirement benefit obligation is reduced by the impact of previously non-taxable government subsidies under the Medicare Prescription Drug Act. Because the subsidies were non-taxable, the temporary difference used in measuring the deferred tax impact was determined on the unrecognized losses excluding such subsidies.

Changes in accumulated comprehensive income (loss) are as follows:

	Year Ended December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Beginning Balance	$	(68	)	$	—		$	6		$	(71	)	$	1		$	3
Other comprehensive income (loss) before reclassifications:
Remeasurement of pension and other postretirement plans	(19		)	—			1			4			—			7
Deferred loss from interest rate derivatives (1)	(19		)	(18		)	(1		)	(5		)	(1		)	(2		)
Amounts reclassified from accumulated other comprehensive loss:
Prior service cost (2)	1			—			1			1			—			1
Actuarial losses (2)	6			—			—			7			—			—
Tax benefit (expense)	6			4			(1		)	(4		)	—			(3		)
Net current period other comprehensive income (loss)	(25		)	(14		)	—			3			(1		)	3
Adoption of ASU 2018-02	(15		)	—			(1		)	—			—			—
Ending Balance	$	(108	)	$	(14	)	$	5		$	(68	)	$	—		$	6

(1) Gains and losses are reclassified from Accumulated other comprehensive income into income when the hedged transactions affect earnings. The reclassification amounts are included in Interest and other finance charges in each of the Registrant’s respective Statements of Consolidated Income. Amounts are less than $1 million for each of the years ended December 31, 2018 and 2017, respectively.

(2) Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

The changes in plan assets and benefit obligations recognized in other comprehensive income during 2018 are as follows:

	Pension Benefits			Postretirement Benefits
	CenterPoint Energy			CenterPoint Energy		CERC
	(in millions)
Net loss (gain)	$	22		$	—	$	(1	)
Amortization of net loss	(6		)	—		—
Amortization of prior service cost	(1		)	—		(1		)
Total recognized in comprehensive income	$	15		$	—	$	(2	)
Total expense recognized in net periodic costs and Other comprehensive income	$	76		$	5	$	3

Benefit Plan Contributions [Table Text Block]

The Registrants made the following contributions in 2018 and expect to make the following minimum contributions in 2019 to the indicated benefit plans below:

	Contributions in 2018						Expected Minimum Contributions in 2019
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Qualified pension plan	$	60	$	—	$	—	$	86	$	—	$	—
Non-qualified pension plan	9		—		—		7		—		—
Postretirement benefit plan	14		9		4		17		10		4

Schedule of Expected Benefit Payments [Table Text Block]

The following benefit payments are expected to be paid by the pension and postretirement benefit plans:

	Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	141	$	16	$	9	$	5
2020	146		19		10		6
2021	154		20		11		6
2022	155		21		11		7
2023	156		22		12		7
2024-2028	759		116		61		37

Defined Contribution Plan Disclosures [Table Text Block]

CenterPoint Energy allocates to Houston Electric and CERC the savings plan benefit expense related to their respective employees. The following table summarizes the Registrants’ savings plan benefit expense for 2018, 2017 and 2016:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Savings plan benefit  expenses	$	43	$	17	$	18	$	41	$	17	$	17	$	38	$	15	$	16

Other Benefit Plans [Table Text Block]

Expenses related to other benefit plans were recorded as follows:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	3	$	4	$	1	$	6	$	1	$	4	$	5	$	3	$	3
Deferred compensation plans	3		1		—		3		1		—		3		1		—

Amounts related to other benefit plans were included in Benefit Obligations in the Registrants’ accompanying Consolidated Balance Sheets as follows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Postemployment benefits	$	11	$	3	$	7	$	20	$	3	$	14
Deferred compensation plans	42		9		3		45		10		3
Split-dollar life insurance arrangements	36		1		—		39		1		—

Other Employee Matters [Table Text Block]

As of December 31, 2018, the Registrants’ employees were covered by collective bargaining agreements as follows:

		Percentage of Employees Covered
	Agreement Expiration	CenterPoint Energy		Houston Electric		CERC
IBEW Local 66	May 2020	18	%	51	%	—
OPEIU Local 12 and Mankato	March and May 2021	3	%	—		3	%
Gas Workers Union Local 340	April 2020	6	%	—		12	%
IBEW Local 949	December 2020	3	%	—		7	%
USW Locals 13-227 and 13-1	June and July 2022	5	%	—		11	%
Total		35	%	51	%	33	%

Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

CenterPoint Energy’s net periodic cost includes the following components relating to pension, including the non-qualified benefit restoration plan:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
Service cost (1)	$	37		$	36		$	38
Interest cost (2)	79			89			93
Expected return on plan assets (2)	(107		)	(97		)	(101		)
Amortization of prior service cost (2)	9			9			9
Amortization of net loss (2)	43			58			63
Net periodic cost	$	61		$	95		$	102

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

Schedule of Assumptions Used [Table Text Block]

CenterPoint Energy used the following assumptions to determine net periodic cost relating to pension benefits:

	Year Ended December 31,
	2018		2017		2016
Discount rate	3.65	%	4.15	%	4.40	%
Expected return on plan assets	6.00		6.00		6.25
Rate of increase in compensation levels	4.45		4.50		4.15

Schedule of Net Pension and Post-retirement Benefit Costs [Table Text Block]

The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in the Consolidated Balance Sheets as well as the key assumptions of CenterPoint Energy’s pension plans. The measurement dates for plan assets and obligations were December 31, 2018 and 2017.

	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	2,225		$	2,197
Service cost	37			36
Interest cost	79			89
Benefits paid	(201		)	(168		)
Actuarial (gain) loss (1)	(127		)	71
Benefit obligation, end of year	2,013			2,225
Change in Plan Assets
Fair value of plan assets, beginning of year	1,801			1,656
Employer contributions	69			48
Benefits paid	(201		)	(168		)
Actual investment return	(153		)	265
Fair value of plan assets, end of year	1,516			1,801
Funded status, end of year	$	(497	)	$	(424	)

	December 31,
	2018			2017
	(in millions, except for actuarial assumptions)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(7	)	$	(7	)
Other liabilities-benefit obligations	(490		)	(417		)
Net liability, end of year	$	(497	)	$	(424	)
Actuarial Assumptions
Discount rate (2)	4.35		%	3.65		%
Expected return on plan assets (3)	6.00			6.00
Rate of increase in compensation levels	4.60			4.45
Interest crediting rate	3.75			3.75

(1) Significant sources of gain for 2018 include the increase in discount rate from 3.65% to 4.35% and the mortality projection scale change from MP2017 to MP2018. For 2017, the significant source of loss was the decrease in the discount rate from 4.15% to 3.65%.

(2) The discount rate assumption was determined by matching the projected cash flows of CenterPoint Energy’s plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

(3) The expected rate of return assumption was developed using the targeted asset allocation of CenterPoint Energy’s plans and the expected return for each asset class.

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

The following table displays pension benefits related to CenterPoint Energy’s pension plans that have accumulated benefit obligations in excess of plan assets:

	December 31,
	2018				2017
	Pension (Qualified)		Pension (Non-qualified)		Pension (Qualified)		Pension (Non-qualified)
	(in millions)
Accumulated benefit obligation	$	1,930	$	61	$	2,090	$	74
Projected benefit obligation	1,952		61		2,151		74
Fair value of plan assets	1,516		—		1,801		—

Target Allocation of Plan Assets [Table Text Block]

As part of the investment strategy discussed above, CenterPoint Energy maintained the following weighted average allocation targets for its pension plans as of December 31, 2018:

U.S. equity	12 - 28%
International developed market equity	7 - 17%
Emerging market equity	5 - 11%
Fixed income	55 - 65%
Cash	0 - 2%

Schedule of Allocation of Plan Assets [Table Text Block]

The following tables set forth by level, within the fair value hierarchy (see Note 10), CenterPoint Energy’s pension plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018										2017
	(Level 1)			(Level 2)		(Level 3)		Total			(Level 1)			(Level 2)		(Level 3)		Total
	(in millions)
Cash	$	19		$	—	$	—	$	19		$	18		$	—	$	—	$	18
Corporate bonds:
Investment grade or above	—			368		—		368			—			432		—		432
Equity securities:
U.S. companies	60			—		—		60			76			—		—		76
Cash received as collateral from securities lending	77			—		—		77			76			—		—		76
U.S. treasuries	196			—		—		196			67			—		—		67
Mortgage backed securities	—			6		—		6			—			8		—		8
Asset backed securities	—			1		—		1			—			1		—		1
Municipal bonds	—			27		—		27			—			47		—		47
Mutual funds (2)	167			—		—		167			211			—		—		211
International government bonds	—			16		—		16			—			17		—		17
Obligation to return cash received as collateral from securities lending	(77		)	—		—		(77		)	(76		)	—		—		(76		)
Total investments at fair value	$	442		$	418	$	—	860			$	372		$	505	$	—	877
Investments measured by net asset value per share or its equivalent (1) (2)								656										924
Total Investments								$	1,516									$	1,801

(1) Represents investments in common collective trust funds.

(2) The amounts invested in mutual funds and common collective trust funds were allocated as follows:

	As of December 31,
	2018				2017
	Mutual Funds		Common Collective Trust Funds		Mutual Funds		Common Collective Trust Funds
International equities	51	%	37	%	57	%	34	%
Emerging market equities	34	%	4	%	30	%	5	%
U.S. equities	15	%	5	%	13	%	6	%
Fixed income	—		54	%	—		55	%

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Postretirement benefits are accrued over the active service period of employees. The net postretirement benefit cost includes the following components:

	Year Ended December 31,
	2018									2017									2016
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Service cost (1)	$	2		$	—		$	1		$	2		$	1		$	1		$	2		$	1		$	1
Interest cost (2)	13			8			4			16			9			5			16			10			4
Expected return on plan assets (2)	(5		)	(4		)	(1		)	(5		)	(4		)	(1		)	(6		)	(5		)	(1		)
Amortization of prior service cost (credit) (2)	(5		)	(5		)	1			(5		)	(6		)	1			(3		)	(4		)	—
Amortization of net loss (2)	—			—			—			—			—			—			1			1			1
Curtailment (3)	—			—			—			—			—			—			(5		)	(4		)	(1		)
Net postretirement benefit cost (credit)	$	5		$	(1	)	$	5		$	8		$	—		$	6		$	5		$	(1	)	$	4

(1) Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

(2) Amounts presented in the table above are included in Other, net in each of the Registrants’ respective Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

(3) A curtailment gain or loss is required when the expected future services of a significant number of current employees are reduced or eliminated for the accrual of benefits. During 2016, postretirement healthcare benefits were amended resulting in a net curtailment gain of $5 million. In May 2016, Houston Electric entered into a renegotiated collective bargaining agreement with the IBEW Local Union 66 that provides that for Houston Electric bargaining unit employees covered under the agreement who retire on or after January 1, 2017, retiree medical and prescription drug coverage will be provided exclusively through the NECA/IBEW Family Medical Care Plan in exchange for the payment of monthly premiums as determined under the agreement. As a result, the accrued postretirement benefits related to such future CenterPoint Energy and Houston Electric union retirees were eliminated. Houston Electric recognized a curtailment gain of $3 million as an accelerated recognition of the prior service credit that would otherwise be recognized in future periods for the postretirement plan. CenterPoint Energy also recognized an additional curtailment gain of $2 million in October 2016 related to other amendments in the postretirement plan.

Schedule of Assumptions Used [Table Text Block]

The following assumptions were used to determine net periodic cost relating to postretirement benefits:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Discount rate	3.60	%	3.60	%	3.60	%	4.15	%	4.15	%	4.15	%	4.35	%	4.35	%	4.35	%
Expected return on plan assets	4.55		4.75		3.85		4.50		4.75		3.60		4.80		5.00		3.95

Schedule of Net Pension and Post-retirement Benefit Costs [Table Text Block]

The following table summarizes changes in the benefit obligation, plan assets, the amounts recognized in consolidated balance sheets and the key assumptions of the postretirement plans. The measurement dates for plan assets and benefit obligations were December 31, 2018 and 2017.

	December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	386		$	225		$	109		$	383		$	217		$	115
Service cost	2			—			1			2			1			1
Interest cost	13			8			4			16			9			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actuarial (gain) loss (1)	(52		)	(56		)	1			4			10			(6		)
Benefit obligation, end of year	331			166			110			386			225			109
Change in Plan Assets
Fair value of plan assets, beginning of year	120			93			26			113			88			25
Employer contributions	14			9			4			16			10			5
Participant contributions	7			2			4			7			2			3
Benefits paid	(25		)	(13		)	(9		)	(26		)	(14		)	(9		)
Actual investment return	(2		)	(2		)	—			10			7			2
Fair value of plan assets, end of year	114			89			25			120			93			26
Funded status, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Amounts Recognized in Balance Sheets
Current liabilities-other	$	(6	)	$	—		$	(3	)	$	(6	)	$	—		$	(4	)
Other liabilities-benefit obligations	(211		)	(77		)	(82		)	(260		)	(132		)	(79		)
Net liability, end of year	$	(217	)	$	(77	)	$	(85	)	$	(266	)	$	(132	)	$	(83	)
Actuarial Assumptions
Discount rate (2)	4.35		%	4.35		%	4.35		%	3.60		%	3.60		%	3.60		%
Expected return on plan assets (3)	4.60			4.70			4.15			4.55			4.75			3.85
Medical cost trend rate assumed for the next year - Pre-65	5.95			5.95			5.95			6.15			6.15			6.15
Medical/prescription drug cost trend rate assumed for the next year - Post-65	28.60			28.60			28.60			23.85			23.85			23.85
Prescription drug cost trend rate assumed for the next year - Pre-65	9.20			9.20			9.20			9.85			9.85			9.85
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50			4.50			4.50			4.50			4.50			4.50
Year that the cost trend rates reach the ultimate trend rate - Pre-65	2026			2026			2026			2026			2026			2026
Year that the cost trend rates reach the ultimate trend rate - Post-65	2027			2027			2027			2024			2024			2024

(1) Significant sources of gain for 2018 include the increase in the discount rate from 3.60% to 4.35%, favorable benefit claims experience and cost trend rates in addition to the change in mortality projection scale from MP2017 to MP2018.

(2) The discount rate assumption was determined by matching the projected cash flows of the plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

(3) The expected rate of return assumption was developed using the targeted asset allocation of the plans and the expected return for each asset class.

Target Allocation of Plan Assets [Table Text Block]

As part of the investment strategy discussed above, the Registrants maintained the following weighted average allocation targets for the postretirement plans as of December 31, 2018:

	CenterPoint Energy	Houston Electric	CERC
U.S. equity	13 - 23%	13 - 23%	15 - 25%
International developed market equity	3 - 13%	3 - 13%	2 - 12%
Fixed income	69 - 79%	69 - 79%	68 - 78%
Cash	0 - 2%	0 - 2%	0 - 2%

Schedule of Allocation of Plan Assets [Table Text Block]

The following table presents mutual funds by level, within the fair value hierarchy, the Registrants’ postretirement plan assets at fair value as of December 31, 2018 and 2017:

	Fair Value Measurements as of December 31,
	2018								2017
	Mutual Funds
	(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)		Total
	(in millions)
CenterPoint Energy	$	114	$	—	$	—	$	114	$	120	$	—	$	—	$	120
Houston Electric	89		—		—		89		93		—		—		93
CERC	25		—		—		25		26		—		—		26

The amounts invested in mutual funds were allocated as follows:

	As of December 31,
	2018						2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
Fixed income	74	%	74	%	73	%	74	%	74	%	71	%
U.S. equities	19	%	19	%	21	%	18	%	18	%	21	%
International equities	7	%	7	%	6	%	8	%	8	%	8	%

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Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The table below summarizes CenterPoint Energy’s and CERC’s weather hedge gain (loss) activity:

				Year Ended December 31,
Jurisdiction	Winter Season	Bilateral Cap		2018			2017			2016
		(in millions)
Certain NGD jurisdictions	2018 – 2019	$	9	$	—		$	—		$	—
Certain NGD jurisdictions	2017 – 2018	8		(2		)	—			—
Total CERC (1)				(2		)	—			—
Electric operations’ Texas service territory	2018 – 2019	8		—			—			—
Electric operations’ Texas service territory	2017 – 2018	9		(2		)	—			—
Electric operations’ Texas service territory	2016 – 2017	9		—			(1		)	1
Total CenterPoint Energy (1)				$	(4	)	$	(1	)	$	1

(1) Weather hedge gains (losses) are recorded in Revenues in the Statements of Consolidated Income.

Fair Value of Derivative Instruments [Table Text Block]

The following tables present information about derivative instruments and hedging activities. The first three tables provide a balance sheet overview of Derivative Assets and Liabilities as of December 31, 2018 and 2017, while the last three tables provide a breakdown of the related income statement impacts for the years ending December 31, 2018, 2017 and 2016.

Fair Value of Derivative Instruments
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Derivative Assets Fair Value		Derivative Liabilities Fair Value		Derivative Assets Fair Value		Derivative Liabilities Fair Value
		(in millions)
Derivatives designated as cash flow hedges:
Interest rate derivatives	Current Liabilities: Non-trading derivative liabilities	$	—	$	24	$	—	$	—
	Total Houston Electric	—		24		—		—
Derivatives designated as fair value hedges:
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	1		7		13		1
Derivatives not designated as hedging instruments:
Natural gas derivatives (1) (2) (3)	Current Assets: Non-trading derivative assets	103		3		114		4
Natural gas derivatives (1) (2) (3)	Other Assets: Non-trading derivative assets	38		—		44		—
Natural gas derivatives (1) (2) (3)	Current Liabilities: Non-trading derivative liabilities	62		173		38		78
Natural gas derivatives (1) (2) (3)	Other Liabilities: Non-trading derivative liabilities	16		25		9		24
	Total CERC	220		208		218		107
Indexed debt securities derivative	Current Liabilities	—		601		—		668
	Total CenterPoint Energy	$	220	$	833	$	218	$	775

(1) The fair value shown for natural gas contracts is comprised of derivative gross volumes totaling 1,674 Bcf or a net 140 Bcf long position and 1,795 Bcf or a net 224 Bcf long position as of December 31, 2018 and 2017, respectively.  Certain natural gas contracts hedge basis risk only and lack a fixed price exposure.

(2) Natural gas contracts are presented on a net basis in the Consolidated Balance Sheets as they are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due and causes derivative assets (liabilities) to be ultimately presented net in a liability (asset) account within the Consolidated Balance Sheets. The net of total non-trading natural gas derivative assets and liabilities is detailed in the Offsetting of Natural Gas Derivative Assets and Liabilities table below.

(3) Derivative Assets and Derivative Liabilities include no material amounts related to physical forward transactions with Enable.

Cumulative Basis Adjustment for Fair Value Hedges (CenterPoint Energy and CERC)
		December 31, 2018				December 31, 2017
	Balance Sheet Location	Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		Carrying Amount of Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item
		(in millions)
Hedged items in fair value hedge relationship:
Natural gas inventory	Current Assets: Natural gas inventory	$	57	$	1	$	80	$	14
Total CenterPoint Energy and CERC		$	57	$	1	$	80	$	14

Offsetting of Natural Gas Derivative Assets and Liabilities [Table Text Block]

Offsetting of Natural Gas Derivative Assets and Liabilities (CenterPoint Energy and CERC)
	December 31, 2018									December 31, 2017
	Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)			Gross AmountsRecognized (1)			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amount Presented in the Consolidated Balance Sheets (2)
	(in millions)
Current Assets: Non-trading derivative assets	$	166		$	(66	)	$	100		$	165		$	(55	)	$	110
Other Assets: Non-trading derivative assets	54			(16		)	38			53			(9		)	44
Current Liabilities: Non-trading derivative liabilities	(183		)	81			(102		)	(83		)	63			(20		)
Other Liabilities: Non-trading derivative liabilities	(25		)	20			(5		)	(24		)	20			(4		)
Total	$	12		$	19		$	31		$	111		$	19		$	130

(1) Gross amounts recognized include some derivative assets and liabilities that are not subject to master netting arrangements.

(2) The derivative assets and liabilities on the Consolidated Balance Sheets exclude accounts receivable or accounts payable that, should they exist, could be used as offsets to these balances in the event of a default.

Income Statement Impact of Derivative Activity [Table Text Block]

Income Statement Impact of Hedge Accounting Activity (CenterPoint Energy and CERC)

	Year Ended December 31,
	2018			2017			2016
	Location and Amount of Gain (Loss) recognized in Income on Hedging Relationship (2)
	Non-utility natural gas expense
	(in millions)
Total amounts presented in the statements of income in which the effects of hedges are recorded	$	4,364		$	3,785		$	1,983
Gain (loss) on fair value hedging relationships:
Commodity contracts:
Hedged items - Natural gas inventory	(13		)	14			—
Derivatives designated as hedging instruments	13			(14		)	—
Amounts excluded from effectiveness testing recognized in earnings immediately (1)	(149		)	(67		)	70

(1) Upon adoption of ASU 2017-12 effective January 1, 2018 (see Note 2 for additional information), CenterPoint Energy and CERC elected to exclude from their assessment of hedge effectiveness the natural gas market price difference between locations of the hedged inventory and the delivery location specified in the hedge instruments. Prior to the adoption of this accounting guidance, the timing difference between the spot price and the futures price, as well as the difference between the timing of the settlement of the futures and the valuation of the underlying physical commodity, was excluded from the assessment of effectiveness for CenterPoint Energy’s and CERC’s existing fair value hedges and will continue to be excluded from the assessment of hedge effectiveness. CenterPoint Energy and CERC elected to continue to immediately recognize amounts excluded from hedge effectiveness in their respective Statements of Consolidated Income.

(2) Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for the Registrants for the years ended December 31, 2018, 2017 and 2016, respectively.

		Year Ended December 31,
	Income Statement Location	2018			2017		2016
		(in millions)
Effects of derivatives not designated as hedging instruments on the income statement:
Commodity contracts	Gains (Losses) in Non-utility revenues	$	107		$	211	$	(18	)
Total CERC		107			211		(18		)
Indexed debt securities derivative	Gains (Losses) in Other Income (Expense)	(232		)	49		(413		)
Interest rate derivatives	Gains in Other Income (Expense)	2			—		—
Total CenterPoint Energy		$	(123	)	$	260	$	(431	)

Credit Quality of Counterparties [Table Text Block]

CenterPoint Energy and CERC enter into financial derivative contracts containing material adverse change provisions. These provisions could require CenterPoint Energy or CERC to post additional collateral if the S&P or Moody’s credit ratings of CenterPoint Energy, Inc. or its subsidiaries, including CERC Corp., are downgraded.  

CenterPoint Energy and CERC

	December 31, 2018		December 31, 2017
	(in millions)
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position	$	1	$	2
Fair value of collateral already posted	—		—
Additional collateral required to be posted if credit risk contingent features triggered	—		2

(d) Credit Quality of Counterparties

In addition to the risk associated with price movements, credit risk is also inherent in CenterPoint Energy’s and CERC’s non-trading derivative activities. Credit risk relates to the risk of loss resulting from non-performance of contractual obligations by a counterparty. The following table shows the composition of counterparties to the non-trading derivative assets:

CenterPoint Energy and CERC
	December 31, 2018				December 31, 2017
	Investment Grade (1)		Total (3)		Investment Grade (1)		Total (3)
	(in millions)
Energy marketers	$	11	$	24	$	6	$	45
End users (2)	30		114		17		109
Total	$	41	$	138	$	23	$	154

(1) “Investment grade” is primarily determined using publicly available credit ratings and considers credit support (including parent company guarantees) and collateral (including cash and standby letters of credit). For unrated counterparties, CenterPoint Energy and CERC determine a synthetic credit rating by performing financial statement analysis and consider contractual rights and restrictions and collateral.

(2) End users are comprised primarily of customers who have contracted to fix the price of a portion of their physical gas requirements for future periods.

(3) The amounts reflected in the table above were not impacted by collateral netting.

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on a Recurring Basis [Table Text Block]

The following tables present information about the Registrants’ assets and liabilities (including derivatives that are presented net) measured at fair value on a recurring basis as of December 31, 2018 and December 31, 2017, and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value.

CenterPoint Energy

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	542	$	—	$	—	$	—		$	542	$	963	$	—	$	—	$	—		$	963
Investments, including money market funds (2)	66		—		—		—			66		68		—		—		—			68
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	609	$	173	$	47	$	(82	)	$	747	$	1,045	$	161	$	57	$	(64	)	$	1,199
Liabilities
Indexed debt securities derivative	$	—	$	601	$	—	$	—		$	601	$	—	$	—	$	668	$	—		$	668
Interest rate derivatives	24		—		—		—			24		—		—		—		—			—
Natural gas derivatives (3)(4)	—		191		17		(101		)	107		—		96		11		(83		)	24
Total liabilities	$	24	$	792	$	17	$	(101	)	$	732	$	—	$	96	$	679	$	(83	)	$	692

Houston Electric

	December 31, 2018										December 31, 2017
	Level 1		Level 2		Level 3		Netting		Total		Level 1		Level 2		Level 3		Netting		Total
Assets	(in millions)
Investments, including money market funds (2)	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Total assets	$	48	$	—	$	—	$	—	$	48	$	51	$	—	$	—	$	—	$	51
Liabilities
Interest rate derivatives	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—
Total liabilities	$	24	$	—	$	—	$	—	$	24	$	—	$	—	$	—	$	—	$	—

CERC

	December 31, 2018											December 31, 2017
	Level 1 (4)		Level 2		Level 3		Netting (1)			Total		Level 1 (4)		Level 2		Level 3		Netting (1)			Total
Assets	(in millions)
Corporate equities	$	2	$	—	$	—	$	—		$	2	$	3	$	—	$	—	$	—		$	3
Investments, including money market funds (2)	11		—		—		—			11		11		—		—		—			11
Natural gas derivatives (3)(4)	—		173		47		(82		)	138		—		161		57		(64		)	154
Hedged portion of natural gas inventory	1		—		—		—			1		14		—		—		—			14
Total assets	$	14	$	173	$	47	$	(82	)	$	152	$	28	$	161	$	57	$	(64	)	$	182
Liabilities
Natural gas derivatives (3)(4)	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24
Total liabilities	$	—	$	191	$	17	$	(101	)	$	107	$	—	$	96	$	11	$	(83	)	$	24

(1) Amounts represent the impact of legally enforceable master netting arrangements that allow CenterPoint Energy and CERC to settle positive and negative positions and also include cash collateral of $19 million as of both December 31, 2018 and 2017, respectively, posted with the same counterparties.

(2) Amounts are included in Prepaid and Other Current Assets and Other Assets in the Consolidated Balance Sheets.

(3) Natural gas derivatives include no material amounts related to physical forward transactions with Enable.

(4) Level 1 natural gas derivatives include exchange-traded derivatives cleared by the CME, which deems that financial instruments cleared by the CME are settled daily in connection with posted cash payments. As a result of this exchange rule, CME-related derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are presented in Level 1 net of posted cash; however, the derivatives remain outstanding and subject to future commodity price fluctuations until they are settled in accordance with their contractual terms. Derivative transactions cleared on exchanges other than the CME (e.g., the Intercontinental Exchange or ICE) continue to be reported on a gross basis.

Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs [Table Text Block]

The following table presents additional information about assets or liabilities, including derivatives that are measured at fair value on a recurring basis for which CenterPoint Energy and CERC have utilized Level 3 inputs to determine fair value:

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy			CERC			CenterPoint Energy			CERC			CenterPoint Energy			CERC
	(in millions)
Beginning balance	$	(622	)	$	46		$	(704	)	$	13		$	12		$	12
Purchases (1)	—			—			—			—			12			12
Total gains (losses)	30			30			96			47			12			12
Total settlements	(39		)	(39		)	(11		)	(11		)	(27		)	(27		)
Transfers into Level 3 (2)	5			5			14			14			(712		)	5
Transfers out of Level 3 (3)	656			(12		)	(17		)	(17		)	(1		)	(1		)
Ending balance (4)	$	30		$	30		$	(622	)	$	46		$	(704	)	$	13
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date:
	$	18		$	18		$	87		$	38		$	(402	)	$	11

(1) Mark-to-market value of Level 3 derivative assets acquired through the purchase of AEM were less than $1 million at the acquisition date.

(2) During 2016, CenterPoint Energy transferred its indexed debt securities from Level 2 to Level 3 to reflect changes in the significance of the unobservable inputs used in the valuation.

(3) During 2018, CenterPoint Energy transferred its indexed debt securities derivative from Level 3 to Level 2 to reflect changes in the significance of the unobservable inputs used in the valuation.

(4) CenterPoint Energy and CERC did not have significant Level 3 sales during any of the years ended December 31, 2018, 2017 or 2016.

Estimated Fair Value of Financial Instruments, Debt Instruments [Table Text Block]

The fair values of cash and cash equivalents, investments in debt and equity securities classified as “trading” and short-term borrowings are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below.  The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy.

	December 31, 2018						December 31, 2017
	CenterPoint Energy (1)		Houston Electric (1)		CERC		CenterPoint Energy (1)		Houston Electric (1)		CERC
Long-term debt, including current maturities	(in millions)
Carrying amount	$	9,140	$	4,717	$	2,371	$	8,679	$	4,753	$	2,457
Fair value	9,308		4,770		2,488		9,220		5,034		2,708

(1) Includes Securitization Bond debt.

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Unconsolidated Affiliate (CenterPoint Energy and CERC) (Tables)

12 Months Ended

Dec. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments [Table Text Block]

CenterPoint Energy and OGE held the following interests in Enable GP as of both December 31, 2018 and 2017:

	Management  Rights (1)		Incentive Distribution Rights (2)
CenterPoint Energy (3)	50	%	40	%
OGE	50	%	60	%

(1) As of December 31, 2018, Enable is controlled jointly by CenterPoint Energy and OGE. Sale of CenterPoint Energy’s or OGE’s ownership interests in Enable GP to a third party is subject to mutual rights of first offer and first refusal, and CenterPoint Energy is not permitted to dispose of less than all of its interest in Enable GP.

(2) Enable is expected to pay a minimum quarterly distribution of $0.2875 per common unit on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates, within 60 days after the end of each quarter. If cash distributions to Enable’s unitholders exceed $0.330625 per common unit in any quarter, Enable GP will receive increasing percentages or incentive distributions rights, up to 50%, of the cash Enable distributes in excess of that amount. In certain circumstances Enable GP will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. To date, no incentive distributions have been made.

(3) CenterPoint Energy held the management rights and incentive distributions rights in Enable GP indirectly through CERC until the Internal Spin on September 4, 2018 described above.

Distributions Received from Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018				2017				2016
	Per Unit		Cash Distribution		Per Unit		Cash Distribution		Per Unit		Cash Distribution
	(in millions, except per unit amounts)
Enable common units (1)	$	0.9540	$	223	$	1.2720	$	297	$	1.2720	$	297
Total CERC			223				297				297
Enable common units (1)	0.3180		74		—		—		—		—
Enable Series A Preferred Units (2)	2.5000		36		2.5000		36		1.5417		22
Total CenterPoint Energy			$	333			$	333			$	319

(1) Reflects CERC’s ownership of Enable common units up to September 4, 2018 when CERC completed the Internal Spin. After such date, distributions from Enable were received directly by CenterPoint Energy.

(2) 2016 amounts represent the period from February 18, 2016 to December 31, 2016.

Transactions with Enable (CenterPoint Energy and CERC):

	Year Ended December 31,
	2018		2017		2016
CenterPoint Energy and CERC	(in millions)
Natural gas expenses, including transportation and storage costs	$	122	$	115	$	110
CenterPoint Energy
Reimbursement of transition services (1)	4		4		7

(1) Represents amounts billed under the Transition Agreements for certain support services provided to Enable. Actual transition services costs are recorded net of reimbursement.

	December 31,
	2018		2017
CenterPoint Energy and CERC	(in millions)
Accounts payable for natural gas purchases from Enable	$	11	$	13
CenterPoint Energy
Accounts receivable for amounts billed for transition services	2		1

CERC’s continuing involvement with Enable subsequent to the Internal Spin is limited to its natural gas purchases from Enable.

Summarized consolidated income (loss) information for Enable is as follows:

	Year Ended December 31,
	2018			2017		2016
	(in millions)
Operating revenues	$	3,431		$	2,803	$	2,272
Cost of sales, excluding depreciation and amortization	1,819			1,381		1,017
Depreciation and amortization	398			366		338
Operating income	648			528		385
Net income attributable to Enable common units	485			400		290
Reconciliation of Equity in Earnings (Losses), net:
CenterPoint Energy’s interest	$	262		$	216	$	160
Basis difference amortization (1)	47			49		48
Loss on dilution, net of proportional basis difference recognition	(2		)	—		—
CenterPoint Energy’s equity in earnings, net	$	307		$	265	$	208

(1) Equity in earnings of unconsolidated affiliate includes CenterPoint Energy’s share of Enable earnings adjusted for the amortization of the basis difference of CenterPoint Energy’s original investment in Enable and its underlying equity in net assets of Enable. The basis difference is being amortized over approximately 30 years, the remaining average life of the assets to which the basis difference is attributed.

Summarized consolidated balance sheet information for Enable is as follows:

	December 31,
	2018			2017
	(in millions)
Current assets	$	449		$	416
Non-current assets	11,995			11,177
Current liabilities	1,615			1,279
Non-current liabilities	3,211			2,660
Non-controlling interest	38			12
Preferred equity	362			362
Enable partners’ equity	7,218			7,280
Reconciliation of Investment in Enable:
CenterPoint Energy’s ownership interest in Enable partners’ equity	$	3,896		$	3,935
CenterPoint Energy’s basis difference	(1,414		)	(1,463		)
CenterPoint Energy’s equity method investment in Enable	$	2,482		$	2,472

Limited Partner Interest and Units Held in Enable (CenterPoint Energy and CERC):

	As of December 31,
	2018				2017
	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)	Limited Partner Interest (1)		Common Units	Enable Series A Preferred Units (2)
CenterPoint Energy (3)	54.0	%	233,856,623	14,520,000	54.1	%	233,856,623	14,520,000
OGE	25.6	%	110,982,805	—	25.7	%	110,982,805	—
Public unitholders	20.4	%	88,392,983	—	20.2	%	87,744,652	—

(1) Excludes the Enable Series A Preferred Units owned by CenterPoint Energy.

(2) The carrying amount of the Enable Series A Preferred Units, reflected as Preferred units - unconsolidated affiliate on CenterPoint Energy’s Consolidated Balance Sheets, was $363 million as of both December 31, 2018 and 2017. No impairment charges or adjustment to carrying value were made as no observable price changes were identified in the current or prior reporting periods. See Note 2(r) for further discussion.

(3) Prior to the Internal Spin on September 4, 2018 described above, CenterPoint Energy’s investment in Enable’s common units, excluding the Enable Series A Preferred Units held directly by CenterPoint Energy, was held indirectly through CERC.

Disposal Groups, Including Discontinued Operations [Table Text Block]

The Internal Spin represents a significant strategic shift that has a material effect on CERC’s operations and financial results and, as a result, CERC’s distribution of its equity investment in Enable met the criteria for discontinued operations classification. CERC has no continuing involvement in the equity investment of Enable. Therefore, CERC’s equity in earnings and related income taxes have been classified as Income from discontinued operations, net of tax, in CERC’s Statements of Consolidated Income for the periods presented. CERC’s equity method investment and related deferred income tax liabilities have been classified as Investment in unconsolidated affiliate - discontinued operations and Deferred income taxes, net - discontinued operations, respectively, in CERC’s Consolidated Balance Sheets for the periods presented. The following table presents amounts included in Income from discontinued operations, net of tax in CERC’s Statements of Consolidated Income.

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Equity in earnings of unconsolidated affiliate, net	$	184	$	265	$	208
Income tax expense	46		104		81
Income from discontinued operations, net of tax	$	138	$	161	$	127

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Indexed Debt Securities (ZENS) and Securities Related to ZENS (CenterPoint Energy) (Tables)

12 Months Ended

Dec. 31, 2018

Indexed Debt Securities [Abstract]

Summarized Financial Information on Investment in Time Warner Securities and Indexed Debt Security Obligation [Table Text Block]

In 1995, CenterPoint Energy sold a cable television subsidiary to TW and received certain ZENS-Related Securities as partial consideration. A subsidiary of CenterPoint Energy holds shares of certain securities detailed in the table below, which are classified as trading securities and are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. Unrealized gains and losses resulting from changes in the market value of the ZENS-Related Securities are recorded in CenterPoint Energy’s Statements of Consolidated Income.

	Shares Held at December 31,
	2018	2017
AT&T Common	10,212,945	—
Charter Common	872,912	872,503
Time Common	—	888,392
TW Common	—	7,107,130

The following table sets forth summarized financial information regarding CenterPoint Energy’s investment in ZENS-Related Securities and each component of CenterPoint Energy’s ZENS obligation. 

	ZENS-Related Securities			Debt Component of ZENS			Derivative Component of ZENS
	(in millions)
Balance as of December 31, 2015	$	805		$	145		$	442
Accretion of debt component of ZENS	—			26			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(178		)	—			—
Distribution to ZENS holders	—			(40		)	(21		)
Loss on indexed debt securities	—			—			296
Gain on ZENS-Related Securities	326			—			—
Balance as of December 31, 2016	953			114			717
Accretion of debt component of ZENS	—			27			—
2% interest paid	—			(17		)	—
Distribution to ZENS holders	—			(2		)	—
Gain on indexed debt securities	—			—			(49		)
Gain on ZENS-Related Securities	7			—			—
Balance as of December 31, 2017	960			122			668
Accretion of debt component of ZENS	—			21			—
2% interest paid	—			(17		)	—
Sale of ZENS-Related Securities	(398		)	—			—
Distribution to ZENS holders	—			(102		)	(46		)
Gain on indexed debt securities	—			—			(21		)
Loss on ZENS-Related Securities	(22		)	—			—
Balance as of December 31, 2018	$	540		$	24		$	601

As a result, CenterPoint Energy recorded the following during the year ended December 31, 2018 related to the events discussed above:

	Meredith/Time			AT&T/TW
	(in millions)
Cash payment to ZENS note holders	$	16		$	382
Indexed debt – reduction	(4		)	(95		)
Indexed debt securities derivative – reduction	(1		)	(45		)
Loss on indexed debt securities	$	11		$	242

CenterPoint Energy’s reference shares for each ZENS consisted of the following:

	December 31,
	2018	2017
	(in shares)
AT&T Common	0.7185	—
Charter Common	0.061382	0.061382
Time Common	—	0.0625
TW Common	—	0.5

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Equity (CenterPoint Energy) (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Dividends Declared [Table Text Block]

CenterPoint Energy declared dividends on its Common Stock during 2018, 2017 and 2016 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
December 12, 2018	February 21, 2019	March 14, 2019	$	0.2875	$	144
October 23, 2018	November 15, 2018	December 13, 2018	0.2775		139
July 26, 2018	August 16, 2018	September 13, 2018	0.2775		120
April 26, 2018	May 17, 2018	June 14, 2018	0.2775		120
Total 2018			$	1.1200	$	523
December 13, 2017	February 15, 2018	March 8, 2018	$	0.2775	$	120
October 25, 2017	November 16, 2017	December 8, 2017	0.2675		116
July 27, 2017	August 16, 2017	September 8, 2017	0.2675		115
April 27, 2017	May 16, 2017	June 9, 2017	0.2675		115
January 5, 2017	February 16, 2017	March 10, 2017	0.2675		115
Total 2017			$	1.3475	$	581

Declaration Date	Record Date	Payment Date	Per Share		Total (in millions)
October 27, 2016	November 16, 2016	December 9, 2016	$	0.2575	$	111
July 28, 2016	August 16, 2016	September 9, 2016	0.2575		111
April 28, 2016	May 16, 2016	June 10, 2016	0.2575		111
January 20, 2016	February 16, 2016	March 10, 2016	0.2575		110
Total 2016			$	1.0300	$	443

CenterPoint Energy declared dividends on its Series A Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	32.1563	$	26
Total 2018			$	32.1563	$	26

CenterPoint Energy declared dividends on its Series B Preferred Stock during 2018 as presented in the table below:

Declaration Date	Record Date	Payment Date	Per Share		Total
					(in millions)
December 12, 2018	February 15, 2019	March 1, 2019	$	17.5000	$	17
October 23, 2018	November 15, 2018	December 1, 2018	11.6667		11
Total 2018			$	29.1667	$	28

There were no Series A Preferred Stock or Series B Preferred Stock outstanding or dividends declared in 2017 and 2016.

Dividend Requirement on Preferred Stock

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Series A Preferred Stock	$	18	$	—	$	—
Series B Preferred Stock	17		—		—
Total preferred stock dividend requirement	$	35	$	—	$	—

Convertible Debt [Table Text Block]

The following table illustrates the conversion rate per share of the Series B Preferred Stock, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Share of Series B Preferred Stock
Greater than $32.6990 (threshold appreciation price)	30.5820 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 30.5820 and 36.6980 shares of Common Stock, determined by dividing $1,000 by the applicable market value
Less than $27.2494 (initial price)	36.6980 shares of Common Stock

The following table illustrates the conversion rate per depositary share, subject to certain anti-dilution adjustments:

Applicable Market Value of the Common Stock	Conversion Rate per Depository Share
Greater than $32.6990 (threshold appreciation price)	1.5291 shares of Common Stock
Equal to or less than $32.6990 but greater than or equal to $27.2494	Between 1.5291 and 1.8349 shares of Common Stock, determined by dividing $50 by the applicable market value
Less than $27.2494 (initial price)	1.8349 shares of Common Stock

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Amounts recognized in accumulated other comprehensive loss (gain) consist of the following:

	December 31,
	2018								2017
	Pension Benefits		Postretirement Benefits						Pension Benefits		Postretirement Benefits
	CenterPoint Energy		CenterPoint Energy			CERC			CenterPoint Energy		CenterPoint Energy			CERC
	(in millions)
Unrecognized actuarial loss (gain)	$	109	$	(7	)	$	(3	)	$	94	$	(8	)	$	(2	)
Unrecognized prior service cost	1		5			5			1		6			6
Deferred tax benefit (1)	—		—			(9		)	—		—			(11		)
Net amount recognized in accumulated other comprehensive loss (gain)	$	110	$	(2	)	$	(7	)	$	95	$	(2	)	$	(7	)

(1) CenterPoint Energy’s and CERC’s postretirement benefit obligation is reduced by the impact of previously non-taxable government subsidies under the Medicare Prescription Drug Act. Because the subsidies were non-taxable, the temporary difference used in measuring the deferred tax impact was determined on the unrecognized losses excluding such subsidies.

Changes in accumulated comprehensive income (loss) are as follows:

	Year Ended December 31,
	2018									2017
	CenterPoint Energy			Houston Electric			CERC			CenterPoint Energy			Houston Electric			CERC
	(in millions)
Beginning Balance	$	(68	)	$	—		$	6		$	(71	)	$	1		$	3
Other comprehensive income (loss) before reclassifications:
Remeasurement of pension and other postretirement plans	(19		)	—			1			4			—			7
Deferred loss from interest rate derivatives (1)	(19		)	(18		)	(1		)	(5		)	(1		)	(2		)
Amounts reclassified from accumulated other comprehensive loss:
Prior service cost (2)	1			—			1			1			—			1
Actuarial losses (2)	6			—			—			7			—			—
Tax benefit (expense)	6			4			(1		)	(4		)	—			(3		)
Net current period other comprehensive income (loss)	(25		)	(14		)	—			3			(1		)	3
Adoption of ASU 2018-02	(15		)	—			(1		)	—			—			—
Ending Balance	$	(108	)	$	(14	)	$	5		$	(68	)	$	—		$	6

(1) Gains and losses are reclassified from Accumulated other comprehensive income into income when the hedged transactions affect earnings. The reclassification amounts are included in Interest and other finance charges in each of the Registrant’s respective Statements of Consolidated Income. Amounts are less than $1 million for each of the years ended December 31, 2018 and 2017, respectively.

(2) Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

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Short Term Borrowings and Long Term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of Short-term Borrowings and Long-term Debt [Table Text Block]

	December 31, 2018					December 31, 2017
	Long-Term			Current (1)		Long-Term			Current (1)
	(in millions)
CERC (2):
Short-term borrowings:
Inventory financing (3)	$	—		$	—	$	—		$	39
Total short-term borrowings	—			—		—			39
Long-term debt:
Senior notes 3.55% to 6.625% due 2021 to 2047	2,193			—		1,593			—
Commercial paper (4)	210			—		898			—
Unamortized debt issuance costs	(15		)	—		(12		)	—
Unamortized discount and premium, net	(17		)	—		(22		)	—
Total CERC long-term debt	2,371			—		2,457			—
Total CERC debt	2,371			—		2,457			39
Houston Electric:
First mortgage bonds 9.15% due 2021	102			—		102			—
General mortgage bonds 1.85% to 6.95% due 2021 to 2048	3,212			—		2,812			—
Restoration Bond Company:
System restoration bonds 4.243% due 2022	197			59		256			56
Bond Company II:
Transition bonds 5.302% due 2019	—			208		208			194
Bond Company III:
Transition bonds 5.234% due 2020	29			56		85			53
Bond Company IV:
Transition bonds 2.161% to 3.028% due 2020 to 2024	753			135		888			131
Unamortized debt issuance costs	(24		)	—		(22		)	—
Unamortized discount and premium, net	(11		)	—		(10		)	—
Total Houston Electric debt	4,258			458		4,319			434
CenterPoint Energy:
ZENS due 2029 (5)	—			24		—			122
Senior notes 2.50% to 4.25% due 2021 to 2028	2,000			—		500			—
Pollution control bonds 5.125% due 2028 (6)	68			—		68			50
Commercial paper (4)	—			—		855			—
Unamortized debt issuance costs	(13		)	—		(4		)	—
Unamortized discount and premium, net	(2		)	—		—			—
Total CenterPoint Energy long-term debt	8,682			482		8,195			606
Total CenterPoint Energy debt	$	8,682		$	482	$	8,195		$	645

(1) Includes amounts due or exchangeable within one year of the date noted.

(2) Issued by CERC Corp.

(3) CenterPoint Energy’s and CERC’s NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third-party AMAs in Arkansas, Louisiana and Oklahoma expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost.

(4) Classified as long-term debt because the termination date of the facility that backstops the commercial paper is more than one year from the date noted.

(5) CenterPoint Energy’s ZENS obligation is bifurcated into a debt component and an embedded derivative component. For additional information regarding ZENS, see Note 12(b). As ZENS are exchangeable for cash at any time at the option of the holders, these notes are classified as a current portion of long-term debt.

(6) $68 million and $118 million of these series of debt were secured by general mortgage bonds of Houston Electric as of December 31, 2018 and 2017, respectively.

Long-term Debt

Debt Retirements. During the year ended December 31, 2018, CenterPoint Energy retired the following debt instrument at maturity:

Registrant	Retirement Date	Debt Instrument	Aggregate Principal Amount (1)		Interest Rate	Maturity Date
			(in millions)
CenterPoint Energy	November 2018	Pollution control bonds	$	50	5.050%	2018

(1) Secured by general mortgage bonds of Houston Electric.

Debt Issuances. During the year ended December 31, 2018 and in January 2019, the Registrants issued the following debt instruments:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Interest Rate	Maturity Date
			(in millions)
Houston Electric (1)	February 2018	General mortgage bonds	$	400	3.95%	2048
CERC (1) (2)	March 2018	Unsecured senior notes	300		3.55%	2023
CERC (1) (2)	March 2018	Unsecured senior notes	300		4.00%	2028
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.60%	2021
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		3.85%	2024
CenterPoint Energy (3)	October 2018	Unsecured senior notes	500		4.25%	2028
Houston Electric (1)	January 2019	General mortgage bonds	700		4.25%	2049

(1) Proceeds from these debt issuances were used for general limited liability company and corporate purposes, as applicable, including capital expenditures, repayment of portions of outstanding commercial paper and borrowings under CenterPoint Energy’s money pool.

(2) Issued by CERC Corp.

(3) Proceeds from these debt issuances were used to fund a portion of the Merger and to pay related fees and expenses.

Schedule of Revolving Credit Facilities and Utilization of Such Facilities [Table Text Block]

As of December 31, 2018 and 2017, the Registrants had the following revolving credit facilities and utilization of such facilities:

	December 31, 2018										December 31, 2017
	Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate		Size of Facility		Loans		Letters of Credit		Commercial Paper		Weighted Average Interest Rate
	(in millions, except weighted average interest rate)
CenterPoint Energy	$	3,300	$	—	$	6	$	—	—		$	1,700	$	—	$	6	$	855	1.88	%
Houston Electric	300		—		4		—		—		300		—		4		—		—
CERC (1)	900		—		1		210		2.93	%	900		—		1		898		1.72	%
Total	$	4,500	$	—	$	11	$	210			$	2,900	$	—	$	11	$	1,753

(1) Issued by CERC Corp.

In January 2019, CenterPoint Energy issued the following commercial paper in connection with the closing of the Merger:

Registrant	Issuance Date	Debt Instrument	Aggregate Principal Amount		Weighted Average Interest Rate
			(in millions)
CenterPoint Energy (1) (2)	January 2019	Commercial paper	$	1,660	2.88%

(1) Proceeds from these commercial paper issuances were used to fund a portion of the Merger and to pay related fees and expenses and were contributed to Vectren for its payment of its stub period cash dividend, long-term incentive payments and to fund the repayment of indebtedness of Vectren subsidiaries redeemed at the option of the holder as a result of the closing of the Merger.

(2) The commercial paper notes were issued at various times in January 2019 with maturities up to and including 90 days as of the time of issuance, and, prior to their use as described in connection with the closing of the Merger, the net proceeds of such issuances were invested in short-term investments.

Execution  Date	Registrant	Size of Facility			Draw Rate of LIBOR plus (1)	Financial Covenant Limit on Debt for Borrowed Money to Capital Ratio (2)	Debt for Borrowed Money to Capital Ratio as of December 31, 2018 (3)	Termination  Date (4)
		(in millions)
March 3, 2016	CenterPoint Energy	$	3,300	(5)	1.250%	65%	44.9%	March 3, 2022
March 3, 2016	Houston Electric	300			1.125%	65%	49.2%	March 3, 2022
March 3, 2016	CERC (6)	900			1.125%	65%	46.8%	March 3, 2022

(1) Based on credit ratings as of December 31, 2018.

(2) For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase from 65% to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification.

(3) As defined in the revolving credit facility agreement, excluding Securitization Bonds.

(4) Amended on June 16, 2017 to extend the termination date.

(5) Pursuant to the amendment entered into in May 2018, the aggregate commitments under the CenterPoint Energy revolving credit facility increased to $3.3 billion on October 5, 2018 as a result of the satisfaction of certain conditions described above.

(6) Issued by CERC Corp.

Schedule of Maturities of Long-term Debt [Table Text Block]

Maturities.  As of December 31, 2018, maturities of long-term debt, capital leases and sinking fund requirements, excluding the ZENS obligation, are as follows:

	CenterPoint Energy (1)		Houston  Electric (1)		CERC		Securitization Bonds
	(in millions)
2019	$	458	$	458	$	—	$	458
2020	231		231		—		231
2021	1,706		613		593		211
2022	1,230		519		210		219
2023	656		356		300		156

(1) These maturities include Securitization Bonds principal repayments on scheduled payment dates.

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Tax Expense [Table Text Block]

The components of the Registrant’ income tax expense (benefit) were as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy
Current income tax expense:
Federal	$	89		$	32		$	23
State	9			9			18
Total current expense	98			41			41
Deferred income tax expense (benefit):
Federal	(25		)	(806		)	185
State	73			36			28
Total deferred expense (benefit)	48			(770		)	213
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Houston Electric
Current income tax expense:
Federal	$	109		$	70		$	165
State	18			19			18
Total current expense	127			89			183
Deferred income tax benefit:
Federal	(38		)	(98		)	(34		)
Total deferred benefit	(38		)	(98		)	(34		)
Total income tax expense (benefit)	$	89		$	(9	)	$	149
CERC - Continuing Operations
Current income tax expense (benefit):
Federal	$	(9	)	$	(31	)	$	21
State	—			(10		)	4
Total current expense (benefit)	(9		)	(41		)	25
Deferred income tax expense (benefit):
Federal	10			(249		)	41
State	21			25			15
Total deferred expense (benefit)	31			(224		)	56
Total income tax expense (benefit)	$	22		$	(265	)	$	81

	Year Ended December 31,
	2018		2017		2016
	(in millions)
CERC - Discontinued Operations
Current income tax expense (benefit):
Federal	$	9	$	31	$	(21	)
State	4		11		2
Total current expense (benefit)	13		42		(19		)
Deferred income tax expense:
Federal	29		56		90
State	4		6		10
Total deferred expense	33		62		100
Total income tax expense	$	46	$	104	$	81

Reconciliation of Expected Federal Income Tax Expense to Actual [Table Text Block]

A reconciliation of income tax expense (benefit) using the federal statutory income tax rate to the actual income tax expense and resulting effective income tax rate is as follows:

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CenterPoint Energy (1) (2) (3)
Income before income taxes	$	514		$	1,063		$	686
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	108			372			240
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	22			26			27
State valuation allowance, net of federal income tax	11			3			3
State law change, net of federal income tax	32			—			—
Federal income tax rate reduction	—			(1,113		)	—
Excess deferred income tax amortization	(24		)	—			—
Other, net	(3		)	(17		)	(16		)
Total	38			(1,101		)	14
Total income tax expense (benefit)	$	146		$	(729	)	$	254
Effective tax rate	28		%	(69		)%	37		%
Houston Electric (4) (5)
Income before income taxes	$	425		$	424		$	425
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	89			148			149
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	14			12			12
Federal income tax rate reduction	—			(158		)	—
Excess deferred income tax amortization	(9		)	—			—
Other, net	(5		)	(11		)	(12		)
Total	—			(157		)	—
Total income tax expense (benefit)	$	89		$	(9	)	$	149
Effective tax rate	21		%	(2		)%	35		%

	Year Ended December 31,
	2018			2017			2016
	(in millions)
CERC - Continuing Operations (6) (7)
Income before income taxes	$	92		$	319		$	199
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	19			112			70
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	5			6			4
State law change, net of federal income tax	—			—			6
State valuation allowance, net of federal income tax	11			3			2
Federal income tax rate reduction	—			(396		)	—
Excess deferred income tax amortization	(15		)	—			—
Tax basis balance sheet adjustment	—			11			—
Other, net	2			(1		)	(1		)
Total	3			(377		)	11
Total income tax expense (benefit)	$	22		$	(265	)	$	81
Effective tax rate	24		%	(83		)%	41		%
CERC - Discontinued Operations (7)
Income before income taxes	$	184		$	265		$	208
Federal statutory income tax rate	21		%	35		%	35		%
Expected federal income tax expense	39			93			73
Increase in tax expense resulting from:
State income tax expense, net of federal income tax	7			11			8
Total	7			11			8
Total income tax expense	$	46		$	104		$	81
Effective tax rate	25		%	39		%	39		%

(1) Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(2) Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

(3) Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

(4) Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

(5) Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

(6) Recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. This item is partially offset by $15 million of amortization of the net regulatory EDIT liability in certain jurisdictions as decreed by regulators beginning in 2018.

(7) Recognized a $396 million deferred tax benefit from the remeasurement of CERC’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. ASC 740 requires tax impacts of changes in tax laws or rates be reported in continuing operations.  Therefore, CERC’s federal income tax benefit generated by the remeasurement of the ADFIT liability for Enable during 2017 and state law changes during 2016 associated with its investment in Enable are reported in continuing operations on CERC’s Statements of Consolidated Income. The ADFIT liability associated with CERC’s investment in Enable is reported as discontinued operations on CERC’s Consolidated Balance Sheets. 

Tax Assets and Liabilities [Table Text Block]

The tax effects of temporary differences that give rise to significant portions of deferred tax assets and liabilities were as follows:

	December 31,
	2018			2017
	(in millions)
CenterPoint Energy
Deferred tax assets:
Benefits and compensation	$	160		$	162
Regulatory liabilities	356			347
Loss and credit carryforwards	84			90
Asset retirement obligations	62			68
Other	29			16
Valuation allowance	(18		)	(7		)
Total deferred tax assets	673			676
Deferred tax liabilities:
Property, plant and equipment	1,894			1,808
Investment in unconsolidated affiliates	987			927
Regulatory assets	395			473
Investment in marketable securities and indexed debt	478			502
Indexed debt securities derivative	27			13
Other	131			127
Total deferred tax liabilities	3,912			3,850
Net deferred tax liabilities	$	3,239		$	3,174
Houston Electric
Deferred tax assets:
Regulatory liabilities	$	205		$	198
Benefits and compensation	17			28
Asset retirement obligations	7			7
Other	12			3
Total deferred tax assets	241			236
Deferred tax liabilities:
Property, plant and equipment	1,087			1,030
Regulatory assets	177			265
Total deferred tax liabilities	1,264			1,295
Net deferred tax liabilities	$	1,023		$	1,059

	December 31,
	2018			2017
	(in millions)
CERC - Continuing Operations
Deferred tax assets:
Benefits and compensation	$	27		$	27
Regulatory liabilities	150			150
Loss and credit carryforwards	259			288
Asset retirement obligations	54			60
Other	20			18
Valuation allowance	(18		)	(7		)
Total deferred tax assets	492			536
Deferred tax liabilities:
Property, plant and equipment	773			745
Regulatory assets	41			38
Other	84			115
Total deferred tax liabilities	898			898
Net deferred tax liabilities	$	406		$	362
CERC - Discontinued Operations
Deferred tax liabilities:
Investment in unconsolidated affiliates	—			927
Net deferred tax liabilities	$	—		$	927

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Long-term Purchase Commitment [Table Text Block]

As of December 31, 2018, minimum payment obligations for natural gas supply commitments are approximately:

	(in millions)
2019	$	454
2020	430
2021	343
2022	231
2023	154
2024 and beyond	1,446

Lease Commitments [Table Text Block]

The following table sets forth information concerning the Registrants’ obligations under non-cancelable long-term operating leases as of December 31, 2018, which primarily consist of rental agreements for real property:            

	CenterPoint Energy		Houston Electric		CERC
	(in millions)
2019	$	6	$	1	$	5
2020	6		—		5
2021	5		—		4
2022	4		—		4
2023	3		—		3
2024 and beyond	12		—		11
Total	$	36	$	1	$	32

Schedule of Rent Expense [Table Text Block]

	Year Ended December 31,
	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Lease expense	$	9	$	1	$	8	$	10	$	1	$	9	$	10	$	1	$	9

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Earnings Per Share (CenterPoint Energy) (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share [Table Text Block]

The following table reconciles numerators and denominators of CenterPoint Energy’s basic and diluted earnings per common share. Basic earnings per common share is determined by dividing Income available to common shareholders - basic by the Weighted average common shares outstanding - basic for the applicable period. Diluted earnings per common share is determined by the inclusion of potentially dilutive common stock equivalent shares that may occur if securities to issue Common Stock were exercised or converted into Common Stock.

	For the Year Ended December 31,
	2018		2017		2016
	(in millions, except per share and share amounts)
Numerator:
Income available to common shareholders - basic (1)	$	333	$	1,792	$	432
Add back: Series B Preferred Stock dividend	—		—		—
Income available to common shareholders - diluted (1)	$	333	$	1,792	$	432
Denominator:
Weighted average common shares outstanding - basic	448,829,000		430,964,000		430,606,000
Plus: Incremental shares from assumed conversions:
Restricted stock (2)	3,636,000		3,344,000		2,997,000
Series B Preferred Stock (3)	—		—		—
Weighted average common shares outstanding - diluted	452,465,000		434,308,000		433,603,000
Earnings per common share:
Basic earnings per common share	$	0.74	$	4.16	$	1.00
Diluted earnings per common share	$	0.74	$	4.13	$	1.00

(1) Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

(2) The potentially dilutive impact from restricted stock awards applies the treasury stock method. Under this method, an increase in the average fair market value of Common Stock can result in a greater dilutive impact from these securities.

(3) The potentially dilutive impact from Series B Preferred Stock applies the if-converted method in calculating diluted earnings per common share. Under this method, diluted earnings per common share is adjusted for the more dilutive effect of the Series B Preferred Stock as a result of either its accumulated dividend for the period in the numerator or the assumed-converted common share equivalent in the denominator. The computation of diluted earnings per common share outstanding for the year ended December 31, 2018 excludes 8,885,000 potentially dilutive shares because to include them would be anti-dilutive. However, these shares could be potentially dilutive in the future.

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Unaudited Quarterly Information (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data [Table Text Block]

Summarized quarterly financial data is as follows:

	Year Ended December 31, 2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	3,155	$	2,186		$	2,212	$	3,036
Operating income	251		187			226		167
Income (loss) available to common shareholders	165		(75		)	153		90
Basic earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18
Diluted earnings (loss) per common share (1)	0.38		(0.17		)	0.35		0.18

	Year Ended December 31, 2018
	First Quarter	Second Quarter		Third Quarter		Fourth Quarter
	(in millions, except per share amounts)
Houston Electric
Revenues	755	854		897		728
Operating income	119	181		227		98
Net income	52	101		143		40
CERC (4)
Revenues	2,400	1,328		1,312		2,303
Operating income (loss)	131	22		(7	)	76
Income (loss) from continuing operations	78	(8	)	(35	)	35
Income (loss) from discontinued operations	52	44		44		(2	)
Net income	130	36		9		33

	Year Ended December 31, 2017
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(in millions, except per share amounts)
CenterPoint Energy
Revenues	$	2,735	$	2,143	$	2,098		$	2,638
Operating income (2)	291		240		297			308
Income available to common shareholders (3)	192		135		169			1,296
Basic earnings per common share (1)	0.45		0.31		0.39			3.01
Diluted earnings per common share (1)	0.44		0.31		0.39			2.99
Houston Electric
Revenues	638		752		843			765
Operating income (2)	85		171		254			127
Net income (3)	18		75		130			210
CERC (4)
Revenues	2,093		1,387		1,251			1,872
Operating income (2)	199		59		31			178
Income (loss) from continuing operations	102		17		(4		)	469
Income from discontinued operations	45		37		42			37
Net income (3)	147		54		38			506

(1) Quarterly earnings (loss) per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings (loss) per common share.

(2) Recast to reflect the adoption of ASU 2017-07. See Note 2(r) for further information.

(3) Income available to common shareholders and Net income for the fourth quarter 2017 include a reduction in income tax expense of $1,113 million, $158 million and $396 million for CenterPoint Energy, Houston Electric and CERC, respectively, due to the TCJA. See Note 15 for further discussion of the impacts of tax reform implementation.

(4) Amounts have been recast to reflect discontinued operations in all periods presented.

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Reportable Segments (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Financial Data for Business Segments [Table Text Block]

As of December 31, 2018, reportable segments by Registrant are as follows:

	Electric Transmission & Distribution	Natural Gas Distribution	Energy  Services	Midstream Investments	Other Operations
CenterPoint Energy	X	X	X	X	X
Houston Electric	X
CERC		X	X	(1)	X

(1) On September 4, 2018, CERC completed the Internal Spin. Previously, CERC’s equity method investment in Enable was included in CERC’s Midstream Investments reportable segment. CERC’s equity in earnings in Enable, net of basis difference amortization and income tax, have been classified as discontinued operations for all periods presented. See Note 11 for further discussion on the Internal Spin and the associated discontinued operations presentation.

Financial data for reportable segments and products and services are as follows:

CenterPoint Energy

	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Electric Transmission & Distribution	$	3,232	(1)	$	—		$	917	$	623		$	10,509			$	952
Natural Gas Distribution	2,931			36			277		266			6,956				638
Energy Services	4,411			110			16		(47		)	1,558				20
Midstream Investments (2)	—			—			—		—			2,482				—
Other Operations	15			—			33		(11		)	6,156			(3)	110
Eliminations	—			(146		)	—		—			(652		)		—
Consolidated	$	10,589		$	—		$	1,243	$	831		$	27,009			1,720
Reconciling items																(69		)
Capital expenditures per Statements of Consolidated Cash Flows																$	1,651

	Revenues from External Customers			Intersegment Revenues			Depreciation and Amortization		Operating Income		Total Assets				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2017:
Electric Transmission & Distribution	$	2,997	(1)	$	—		$	724	$	636	$	10,292			$	924
Natural Gas Distribution	2,606			33			260		348		6,608				523
Energy Services	3,997			52			19		126		1,521				11
Midstream Investments (2)	—			—			—		—		2,472				—
Other Operations	14			—			33		26		2,497			(3)	36
Eliminations	—			(85		)	—		—		(654		)		—
Consolidated	$	9,614		$	—		$	1,036	$	1,136	$	22,736			1,494
Reconciling items															(68		)
Capital expenditures per Statements of Consolidated Cash Flows															$	1,426
As of and for the year ended December 31, 2016:
Electric Transmission & Distribution	$	3,060	(1)	$	—		$	838	$	653	$	10,211			$	858
Natural Gas Distribution	2,380			29			242		321		6,099				510
Energy Services	2,073			26			7		21		1,102				5
Midstream Investments (2)	—			—			—		—		2,505				—
Other Operations	15			—			39		28		2,681			(3)	33
Eliminations	—			(55		)	—		—		(769		)		—
Consolidated	$	7,528		$	—		$	1,126	$	1,023	$	21,829			1,406
Reconciling items															8
Capital expenditures per Statements of Consolidated Cash Flows															$	1,414

(1) CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Affiliates of NRG	$	705	$	713	$	698
Affiliates of Vistra Energy Corp.	251		229		220

(2) CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Enable	$	307	$	265	$	208

(3) Total assets included pension and other postemployment-related regulatory assets of $665 million, $600 million and $759 million as of December 31, 2018, 2017 and 2016, respectively. Additionally, total assets as of December 31, 2018 included $3.9 billion of temporary investments included in Cash and cash equivalents on CenterPoint Energy’s Consolidated Balance Sheets.

CERC

	Revenues from External Customers		Intersegment Revenues			Depreciation and Amortization		Operating Income			Total Assets (1)				Expenditures for Long-Lived Assets
	(in millions)
As of and for the year ended December 31, 2018:
Natural Gas Distribution	$	2,931	$	36		$	277	$	266		$	6,956			$	638
Energy Services	4,411		110			16		(47		)	1,558				20
Other Operations	1		—			—		3			66				—
Eliminations	—		(146		)	—		—			(366		)		—
Consolidated	$	7,343	$	—		$	293	$	222		$	8,214			658
Reconciling items															(25		)
Capital expenditures per Statements of Consolidated Cash Flows															$	633
As of and for the year ended December 31, 2017:
Natural Gas Distribution	$	2,606	$	33		$	260	$	348		$	6,608			$	523
Energy Services	3,997		52			19		126			1,521				11
Discontinued operations	—		—			—		—			2,472			(1)	—
Other Operations	—		—			—		(7		)	70				—
Eliminations	—		(85		)	—		—			(559		)		—
Consolidated	$	6,603	$	—		$	279	$	467		$	10,112			534
Reconciling items															(21		)
Capital expenditures per Statements of Consolidated Cash Flows															$	513
As of and for the year ended December 31, 2016:
Natural Gas Distribution	$	2,380	$	29		$	242	$	321		$	6,099			$	510
Energy Services	2,073		26			7		21			1,102				5
Discontinued operations	—		—			—		—			2,505			(1)	—
Other Operations	1		—			—		(1		)	75				—
Eliminations	—		(55		)	—		—			(563		)		—
Consolidated	$	4,454	$	—		$	249	$	341		$	9,218			515
Reconciling items															2
Capital expenditures per Statements of Consolidated Cash Flows															$	517

(1) On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Affiliates of NRG	$	705	$	713	$	698
Affiliates of Vistra Energy Corp.	251		229		220

Midstream Investments [Table Text Block]

CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Year Ended December 31,
	2018		2017		2016
	(in millions)
Enable	$	307	$	265	$	208

Revenues by Products and Services [Table Text Block]

	Year Ended December 31,
	2018						2017						2016
Revenues by Products and Services:	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Electric delivery	$	3,232	$	3,234	$	—	$	2,997	$	2,998	$	—	$	3,060	$	3,059	$	—
Retail gas sales	4,161		—		4,161		3,634		—		3,634		3,329		—		3,329
Wholesale gas sales	3,008		—		3,008		2,811		—		2,811		977		—		977
Gas transportation and processing	32		—		32		29		—		29		23		—		23
Energy products and services	156		—		142		143		—		129		139		—		125
Total	$	10,589	$	3,234	$	7,343	$	9,614	$	2,998	$	6,603	$	7,528	$	3,059	$	4,454

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Supplemental Disclosure of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

The tables below provide supplemental disclosure of cash flow information:

	2018						2017						2016
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy			Houston Electric		CERC
	(in millions)
Cash Payments/Receipts:
Interest, net of capitalized interest	$	363	$	200	$	105	$	378	$	205	$	116	$	406		$	209	$	116
Income taxes (refunds), net	89		154		3		15		76		4		(104		)	128		3
Non-cash transactions:
Accounts payable related to capital expenditures	201		124		80		144		104		56		87			65		35
Capital distribution associated with the Internal Spin	—		—		1,473		—		—		—		—			—		—

The table below provides a reconciliation of cash, cash equivalents and restricted cash reported in the Consolidated Balance Sheets to the amount reported in the Statements of Consolidated Cash Flows:

	December 31, 2018						December 31, 2017
	CenterPoint Energy		Houston Electric		CERC		CenterPoint Energy		Houston Electric		CERC
	(in millions)
Cash and cash equivalents (1) (2)	$	4,231	$	335	$	14	$	260	$	238	$	12
Restricted cash included in Prepaid expenses and other current assets	46		34		11		35		35		—
Restricted cash included in Other	1		1		—		1		1		—
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows	$	4,278	$	370	$	25	$	296	$	274	$	12

(1) CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

(2) Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

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Related Party Transactions (Houston Electric and CERC) (Tables)

12 Months Ended

Dec. 31, 2018

Related Party Transactions [Abstract]

Schedule of Money Pool Investment and Borrowing [Table Text Block]

Houston Electric and CERC participate in a money pool through which they can borrow or invest on a short-term basis. Funding needs are aggregated and external borrowing or investing is based on the net cash position. The net funding requirements of the money pool are expected to be met with borrowings under CenterPoint Energy’s revolving credit facility or the sale of CenterPoint Energy’s commercial paper.The table below summarizes money pool activity:

	December 31, 2018						December 31, 2017
	Houston Electric			CERC			Houston Electric			CERC
	(in millions)
Money pool investments (borrowings) (1)	$	(1	)	$	114		$	(60	)	$	(570	)
Weighted average interest rate	2.42		%	2.42		%	1.90		%	1.90		%

(1) Included in Accounts and notes receivable (payable)–affiliated companies in Houston Electric’s and CERC’s Consolidated Balance Sheets.

Schedule of Related Party Transactions [Table Text Block]

Houston Electric and CERC affiliate-related net interest income (expense) were as follows:

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric			CERC
	(in millions)
Interest income (expense), net (1)	$	1	$	—	$	2	$	—	$	(4	)	$	—

(1) Interest income is included in Other, net and interest expense is included in Interest and other finance charges on Houston Electric’s and CERC’s respective Statements of Consolidated Income.

Amounts charged for these services were as follows and are included primarily in operation and maintenance expenses:

	Year Ended December 31,
	2018					2017					2016
	Houston Electric			CERC		Houston Electric			CERC		Houston Electric			CERC
	(in millions)
Corporate service charges	$	190		$	147	$	188		$	128	$	179		$	125
Net affiliate service charges (billings)	(17		)	17		(9		)	9		(8		)	8

The table below presents transactions among Houston Electric, CERC and their parent, Utility Holding.

	Year Ended December 31,
	2018				2017				2016
	Houston Electric		CERC		Houston Electric		CERC		Houston Electric		CERC
	(in millions)
Cash dividends paid to parent	$	209	$	360	$	180	$	601	$	135	$	643
Cash contribution from parent	200		960		—		38		374		72
Capital distribution to parent associated with the Internal Spin	—		1,473		—		—		—		—

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Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2018

Subsequent Events [Abstract]

Schedule of Subsequent Events [Table Text Block]

Enable Distributions Declarations (CenterPoint Energy)

Equity Instrument	Declaration Date	Record Date	Payment Date	Per Unit Distribution		Expected Cash Distribution
						(in millions)
Common units	February 8, 2019	February 19, 2019	February 26, 2019	$	0.318	$	74
Enable Series A Preferred Units	February 8, 2019	February 8, 2019	February 14, 2019	0.625		9

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Background (Details) $ in Billions			12 Months Ended
		Feb. 01, 2019 USD ($)	Dec. 31, 2018 state shares	Dec. 31, 2017
Vectren [Member] | Subsequent Event [Member]
Cash paid to acquire Vectren | $		$ 6
Enable Midstream Partners [Member]
Ownership percentage of equity method investment	[1],[2]		54.00%	54.10%
Enable Midstream Partners [Member] | Series A Preferred Units [Member]
Preferred units held | shares			14,520,000
Enable GP, LLC [Member]
Management rights ownership percentage			50.00%
Incentive distribution right			40.00%
CERC Corp [Member] | Enable Midstream Partners [Member]
Ownership percentage of equity method investment	[1],[2]			54.10%
CERC Corp [Member] | Enable GP, LLC [Member]
Management rights ownership percentage	[3],[4]			50.00%
Incentive distribution right	[4],[5]			40.00%
CERC Corp [Member] | Natural Gas Distribution [Member]
Number of states in which entity operates			6
CERC Corp [Member] | Energy Services [Member]
Number of states in which entity operates			30
CenterPoint Energy [Member] | Enable GP, LLC [Member]
Management rights ownership percentage	[3],[4]		50.00%	50.00%
Incentive distribution right	[4],[5]		40.00%	40.00%

[1] Excludes the Enable Series A Preferred Units owned by CenterPoint Energy.

[2] Prior to the Internal Spin on September 4, 2018 described above, CenterPoint Energy’s investment in Enable’s common units, excluding the Enable Series A Preferred Units held directly by CenterPoint Energy, was held indirectly through CERC.

[3] As of December 31, 2018, Enable is controlled jointly by CenterPoint Energy and OGE. Sale of CenterPoint Energy’s or OGE’s ownership interests in Enable GP to a third party is subject to mutual rights of first offer and first refusal, and CenterPoint Energy is not permitted to dispose of less than all of its interest in Enable GP.

[4] CenterPoint Energy held the management rights and incentive distributions rights in Enable GP indirectly through CERC until the Internal Spin on September 4, 2018 described above.

[5] Enable is expected to pay a minimum quarterly distribution of $0.2875 per common unit on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates, within 60 days after the end of each quarter. If cash distributions to Enable’s unitholders exceed $0.330625 per common unit in any quarter, Enable GP will receive increasing percentages or incentive distributions rights, up to 50%, of the cash Enable distributes in excess of that amount. In certain circumstances Enable GP will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. To date, no incentive distributions have been made.

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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Provision for doubtful accounts		$ 16	$ 14	$ 7
Interest Expense [Member]
Significant Accounting Policies [Line Items]
Interest and AFUDC debt (1)	[1]	8	9	8
Other Income (Expense) [Member]
Significant Accounting Policies [Line Items]
AFUDC equity (2)	[2]	12	11	7
Houston Electric [Member]
Significant Accounting Policies [Line Items]
Provision for doubtful accounts		0	1	0
Houston Electric [Member] | Interest Expense [Member]
Significant Accounting Policies [Line Items]
Interest and AFUDC debt (1)	[1]	6	6	6
Houston Electric [Member] | Other Income (Expense) [Member]
Significant Accounting Policies [Line Items]
AFUDC equity (2)	[2]	10	10	6
CERC Corp [Member]
Significant Accounting Policies [Line Items]
Provision for doubtful accounts		16	13	7
CERC Corp [Member] | Interest Expense [Member]
Significant Accounting Policies [Line Items]
Interest and AFUDC debt (1)	[1]	2	2	2
CERC Corp [Member] | Other Income (Expense) [Member]
Significant Accounting Policies [Line Items]
AFUDC equity (2)	[2]	2	1	1
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Amount of right-of-use assets and liabilities to recognize on the statement of financial position upon adoption of ASU 2016-02		30
Accounting Standards Update 2016-02 [Member] | Houston Electric [Member]
Significant Accounting Policies [Line Items]
Amount of right-of-use assets and liabilities to recognize on the statement of financial position upon adoption of ASU 2016-02		1
Accounting Standards Update 2016-02 [Member] | CERC Corp [Member]
Significant Accounting Policies [Line Items]
Amount of right-of-use assets and liabilities to recognize on the statement of financial position upon adoption of ASU 2016-02		28
Accounting Standards Update 2016-15 [Member]
Significant Accounting Policies [Line Items]
Effect of change on cash flow activities due to adoption of new ASU		2	4	8
Accounting Standards Update 2016-15 [Member] | Houston Electric [Member]
Significant Accounting Policies [Line Items]
Effect of change on cash flow activities due to adoption of new ASU		2	4	8
Accounting Standards Update 2016-18 [Member]
Significant Accounting Policies [Line Items]
Effect of change on cash flow activities due to adoption of new ASU		(11)	(4)	5
Accounting Standards Update 2016-18 [Member] | Houston Electric [Member]
Significant Accounting Policies [Line Items]
Effect of change on cash flow activities due to adoption of new ASU			(4)	5
Accounting Standards Update 2016-18 [Member] | CERC Corp [Member]
Significant Accounting Policies [Line Items]
Effect of change on cash flow activities due to adoption of new ASU		(11)
Accounting Standards Update 2017-07 [Member] | Operating Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		47	64	64
Accounting Standards Update 2017-07 [Member] | Other Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		(47)	(64)	(64)
Accounting Standards Update 2017-07 [Member] | Houston Electric [Member] | Operating Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		21	26	25
Accounting Standards Update 2017-07 [Member] | Houston Electric [Member] | Other Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		(21)	(26)	(25)
Accounting Standards Update 2017-07 [Member] | CERC Corp [Member] | Operating Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		11	23	23
Accounting Standards Update 2017-07 [Member] | CERC Corp [Member] | Other Income [Member]
Significant Accounting Policies [Line Items]
Increase to operating income and corresponding (decrease) to other income from the adoption of ASU 2017-07		(11)	(23)	$ (23)
Accounting Standards Update 2018-02 [Member]
Significant Accounting Policies [Line Items]
Tax (benefit) expense reclassification adjustment related to adoption of ASU 2018-02		(15)	0
Accounting Standards Update 2018-02 [Member] | Houston Electric [Member]
Significant Accounting Policies [Line Items]
Tax (benefit) expense reclassification adjustment related to adoption of ASU 2018-02		0	0
Accounting Standards Update 2018-02 [Member] | CERC Corp [Member]
Significant Accounting Policies [Line Items]
Tax (benefit) expense reclassification adjustment related to adoption of ASU 2018-02		$ (1)	$ 0

[1] Included in Interest and other finance charges on the Registrants’ respective Statements of Consolidated Income.

[2] Included in Other Income (Expense) on the Registrants’ respective Statements of Consolidated Income.

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Property, Plant and Equipment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 20,267	$ 19,031
Accumulated Depreciation & Amortization		6,223	5,974
Property, Plant and Equipment, Net		14,044	13,057
Depreciation and Amortization [Abstract]
Depreciation		626	619	$ 607
Amortization of securitized regulatory assets		531	329	455
Other amortization		86	88	64
Total		1,243	1,036	1,126
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		281	205
Accretion expense (1)	[1]	10	8
Revisions in estimates (2)	[2]	(33)	68
Ending balance		258	281	205
Houston Electric [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		12,148	11,496
Accumulated Depreciation & Amortization		3,746	3,633
Property, Plant and Equipment, Net		8,402	7,863
Depreciation and Amortization [Abstract]
Depreciation		342	354	349
Amortization of securitized regulatory assets		531	329	455
Other amortization		44	41	34
Total		917	724	838
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		35	33
Accretion expense (1)	[1]	1	1
Revisions in estimates (2)	[2]	(2)	1
Ending balance		34	35	33
CERC Corp [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		7,431	6,888
Accumulated Depreciation & Amortization		2,205	2,036
Property, Plant and Equipment, Net		5,226	4,852
Depreciation and Amortization [Abstract]
Depreciation		264	243	230
Other amortization		29	36	19
Total		293	279	249
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance		243	169
Accretion expense (1)	[1]	9	7
Revisions in estimates (2)	[2]	(31)	67
Ending balance		221	243	$ 169
Electric Transmission and Distribution [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		12,148	11,496
Accumulated Depreciation & Amortization		3,746	3,633
Property, Plant and Equipment, Net		$ 8,402	7,863
Electric Transmission and Distribution [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		35 years
Electric Transmission [Member] | Houston Electric [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 3,077	2,767
Accumulated Depreciation & Amortization		650	620
Property, Plant and Equipment, Net		$ 2,427	2,147
Electric Transmission [Member] | Houston Electric [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		45 years
Electric Distribution [Member] | Houston Electric [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 7,524	7,178
Accumulated Depreciation & Amortization		2,553	2,522
Property, Plant and Equipment, Net		$ 4,971	4,656
Electric Distribution [Member] | Houston Electric [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		33 years
Natural Gas Distribution [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 7,257	6,735
Accumulated Depreciation & Amortization		2,128	1,968
Property, Plant and Equipment, Net		$ 5,129	4,767
Natural Gas Distribution [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		28 years
Natural Gas Distribution [Member] | CERC Corp [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 7,257	6,735
Accumulated Depreciation & Amortization		2,128	1,968
Property, Plant and Equipment, Net		$ 5,129	4,767
Natural Gas Distribution [Member] | CERC Corp [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		28 years
Energy Services [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 121	102
Accumulated Depreciation & Amortization		43	35
Property, Plant and Equipment, Net		$ 78	67
Energy Services [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		27 years
Energy Services [Member] | CERC Corp [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 121	102
Accumulated Depreciation & Amortization		43	35
Property, Plant and Equipment, Net		$ 78	67
Energy Services [Member] | CERC Corp [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		27 years
Other property [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 741	698
Accumulated Depreciation & Amortization		306	338
Property, Plant and Equipment, Net		$ 435	360
Other property [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		26 years
Other property [Member] | Houston Electric [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 1,547	1,551
Accumulated Depreciation & Amortization		543	491
Property, Plant and Equipment, Net		$ 1,004	1,060
Other property [Member] | Houston Electric [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		18 years
Other property [Member] | CERC Corp [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross		$ 53	51
Accumulated Depreciation & Amortization		34	33
Property, Plant and Equipment, Net		$ 19	$ 18
Other property [Member] | CERC Corp [Member] | Weighted Average [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Weighted Average Useful Lives		23 years

[1] Reflected in Regulatory assets on each of the Registrants’ respective Consolidated Balance Sheets.

[2] In 2018, CenterPoint Energy and CERC reflected a decrease in their respective ARO liability which is primarily attributable to increases in the long-term interest rates used for discounting in the ARO calculation. In 2017, CenterPoint Energy and CERC reflected an increase in their respective ARO liability which is primarily attributable to decreases in the long-term interest rates used for discounting in the ARO calculation.

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Mergers and Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
		Feb. 01, 2019	Jan. 03, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Dividends declared per share				$ 1.12		$ 1.3475		$ 1.03
Total short-term borrowings				$ 0		$ 39
Goodwill				867		867
Reduction in income taxes due to tax reform				0	[1]	1,113	[2]	$ 0	[3]
CERC Corp [Member]
Total short-term borrowings	[4],[5]			0		39
Goodwill				867		867
Vectren [Member]
Total short-term borrowings				167
Long-term debt including current maturities				2,200
Vectren [Member] | Operation And Maintenance Expense [Member]
Transaction costs				28
Integration costs				$ 18
Atmos Energy Marketing [Member]
Purchase price consideration			$ 147
Goodwill			5
Operating Revenue						9,614		8,541
Net Income (1)	[6]					1,792		442
Atmos Energy Marketing [Member] | Customer Relationships [Member]
Intangibles estimated fair value			$ 25
Intangibles estimated useful life			15 years
Atmos Energy Marketing [Member] | CERC Corp [Member]
Goodwill			$ 5
Operating Revenue						6,603		5,467
Net Income (1)	[6]					745		$ 255
Reduction in income taxes due to tax reform						$ 396
Atmos Energy Marketing [Member] | CERC Corp [Member] | Customer Relationships [Member]
Intangibles estimated fair value			$ 25
Intangibles estimated useful life			15 years
Subsequent Event [Member] | Vectren [Member]
Effective date of acquisition		Feb. 01, 2019
Purchase price consideration		$ 6,000
Cash paid per share of Vectren common stock at closing of the Merger		$ 72.00
Subsequent Event [Member] | Vectren [Member] | Stub period [Member]
Dividends declared per share		$ 0.41145
Declaration Date		Jan. 16, 2019
Record Date		Feb. 01, 2019

[1] Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[2] Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[3] Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

[4] Includes amounts due or exchangeable within one year of the date noted.

[5] Issued by CERC Corp.

[6] Net income for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million and $396 million due to the TCJA for CenterPoint Energy and CERC, respectively. See Note 15 for further discussion of the impacts of tax reform implementation.

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Revenue Recognition (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue from contracts										$ 6,745	$ 6,124	$ 5,711
Derivatives income										4,024	3,568	1,812
Other (3)	[1]									(34)	7	60
Total revenues		$ 3,036	$ 2,212	$ 2,186	$ 3,155	$ 2,638	$ 2,098	$ 2,143	$ 2,735	10,589	9,614	7,528
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(146)	(85)	(55)
Electric Transmission & Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]									3,232	2,997	3,060
Electric Transmission & Distribution [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										0	0	0
Natural Gas Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenues										2,931	2,606	2,380
Natural Gas Distribution [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(36)	(33)	(29)
Energy Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues										4,411	3,997	2,073
Energy Services [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(110)	(52)	(26)
Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues										15	14	15
Corporate and Other [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										0	0	0
Reportable Subsegments [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[3]									(36)	(33)	(29)
Derivatives income	[4]									(110)	(52)	(26)
Total revenues										(146)	(85)	(55)
Reportable Subsegments [Member] | Electric Transmission & Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[3]									3,235	3,001	3,050
Derivatives income	[3]									(2)	(1)	1
Other (3)	[1],[3]									(1)	(3)	9
Total revenues	[3]									3,232	2,997	3,060
Reportable Subsegments [Member] | Natural Gas Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[3]									3,011	2,638	2,368
Derivatives income	[3]									(2)	0	0
Other (3)	[1],[3]									(42)	1	41
Total revenues	[3]									2,931	2,606	2,380
Reportable Subsegments [Member] | Energy Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[4]									493	480	288
Derivatives income	[4]									4,028	3,569	1,811
Other (3)	[1],[4]									0	0	0
Total revenues	[4]									4,411	3,997	2,073
Reportable Subsegments [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[4]									6	5	5
Derivatives income	[4]									0	0	0
Other (3)	[1],[4]									9	9	10
Total revenues	[4]									15	14	15
Houston Electric [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 728	$ 897	$ 854	$ 755	$ 765	$ 843	$ 752	$ 638	3,234	2,998	3,059
Houston Electric [Member] | Reportable Subsegments [Member] | Electric Transmission & Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts										3,235	3,001	3,050
Derivatives income										0	0	0
Other (3)	[1]									(1)	(3)	9
Total revenues										3,234	2,998	3,059
CERC Corp [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts										3,505	3,118	2,656
Derivatives income										4,026	3,569	1,811
Other (3)	[1]									(42)	1	42
Total revenues										7,343	6,603	4,454
CERC Corp [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(146)	(85)	(55)
CERC Corp [Member] | Natural Gas Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenues										2,931	2,606	2,380
CERC Corp [Member] | Natural Gas Distribution [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(36)	(33)	(29)
CERC Corp [Member] | Energy Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues										4,411	3,997	2,073
CERC Corp [Member] | Energy Services [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										(110)	(52)	(26)
CERC Corp [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues										1	0	1
CERC Corp [Member] | Corporate and Other [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues										0	0	0
CERC Corp [Member] | Reportable Subsegments [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[3]									(36)	(33)	(29)
Derivatives income	[4]									(110)	(52)	(26)
Total revenues										(146)	(85)	(55)
CERC Corp [Member] | Reportable Subsegments [Member] | Natural Gas Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[3]									3,011	2,638	2,368
Derivatives income	[3]									(2)	0	0
Other (3)	[1],[3]									(42)	1	41
Total revenues	[3]									2,931	2,606	2,380
CERC Corp [Member] | Reportable Subsegments [Member] | Energy Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[4]									493	480	288
Derivatives income	[4]									4,028	3,569	1,811
Other (3)	[1],[4]									0	0	0
Total revenues	[4]									4,411	3,997	2,073
CERC Corp [Member] | Reportable Subsegments [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts	[4]									1	0	0
Derivatives income	[4]									0	0	0
Other (3)	[1],[4]									0	0	1
Total revenues	[4]									$ 1	$ 0	$ 1

[1] Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

[2] CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows: Year Ended December 31, 2018 2017 2016 (in millions)Affiliates of NRG $705 $713 $698Affiliates of Vistra Energy Corp. 251 229 220

[3] Reflected in Utility revenues in the Statements of Consolidated Income.

[4] Reflected in Non-utility revenues in the Statements of Consolidated Income.

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Goodwill and Other Intangibles (CenterPoint Energy and CERC) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill		$ 867,000,000	$ 867,000,000
Goodwill impairment charge recorded from annual impairment test		0	0
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		106,000,000	105,000,000
Accumulated Amortization		(41,000,000)	(31,000,000)
Net Balance		65,000,000	74,000,000
Amortization expense of intangible assets (1)	[1]	10,000,000	13,000,000	$ 4,000,000
Estimated amortization expense over next twelve months		11,000,000
Estimated amortization expense in two years		6,000,000
Estimated amortization expense in three years		6,000,000
Estimated amortization expense in four years		6,000,000
Estimated amortization expense in five years		5,000,000
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		86,000,000	86,000,000
Accumulated Amortization		(27,000,000)	(21,000,000)
Net Balance		59,000,000	65,000,000
Covenants Not To Compete [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		4,000,000	4,000,000
Accumulated Amortization		(3,000,000)	(2,000,000)
Net Balance		1,000,000	2,000,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		16,000,000	15,000,000
Accumulated Amortization		(11,000,000)	(8,000,000)
Net Balance		5,000,000	7,000,000
Natural Gas Distribution [Member]
Goodwill [Line Items]
Goodwill		746,000,000	746,000,000
Energy Services [Member]
Goodwill [Line Items]
Goodwill	[2]	110,000,000	110,000,000
Accumulated goodwill impairment charge recorded in 2012		252,000,000	252,000,000
Corporate and Other [Member]
Goodwill [Line Items]
Goodwill		11,000,000	11,000,000
CERC Corp [Member]
Goodwill [Line Items]
Goodwill		867,000,000	867,000,000
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		106,000,000	105,000,000
Accumulated Amortization		(41,000,000)	(31,000,000)
Net Balance		65,000,000	74,000,000
Amortization expense of intangible assets (1)	[1]	10,000,000	13,000,000	$ 4,000,000
Estimated amortization expense over next twelve months		11,000,000
Estimated amortization expense in two years		6,000,000
Estimated amortization expense in three years		6,000,000
Estimated amortization expense in four years		6,000,000
Estimated amortization expense in five years		5,000,000
CERC Corp [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		86,000,000	86,000,000
Accumulated Amortization		(27,000,000)	(21,000,000)
Net Balance		59,000,000	65,000,000
CERC Corp [Member] | Covenants Not To Compete [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		4,000,000	4,000,000
Accumulated Amortization		(3,000,000)	(2,000,000)
Net Balance		1,000,000	2,000,000
CERC Corp [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		16,000,000	15,000,000
Accumulated Amortization		(11,000,000)	(8,000,000)
Net Balance		5,000,000	7,000,000
CERC Corp [Member] | Natural Gas Distribution [Member]
Goodwill [Line Items]
Goodwill		746,000,000	746,000,000
CERC Corp [Member] | Energy Services [Member]
Goodwill [Line Items]
Goodwill	[2]	110,000,000	110,000,000
Accumulated goodwill impairment charge recorded in 2012		252,000,000	252,000,000
CERC Corp [Member] | Corporate and Other [Member]
Goodwill [Line Items]
Goodwill		$ 11,000,000	$ 11,000,000

[1] Recorded in Depreciation and amortization expenses on CenterPoint Energy’s and CERC’s respective Statements of Consolidated Income.

[2] Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

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Regulatory Accounting (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Regulatory Assets and Liabilities [Line Items]
Securitized regulatory assets		$ 1,059	$ 1,590
Unrecognized equity return (2)	[1]	(213)	(287)
Unamortized loss on reacquired debt		68	75
Non-current regulatory assets		1,967	2,347
Total regulatory assets		2,044	2,477
Non-current regulatory liabilities		2,525	2,464
Total regulatory liabilities		2,563	2,488
Total regulatory assets and liabilities, net		(519)	(11)
Amount of allowed equity return on the true-up balance that was recognized in the period		74	42	$ 64
Prepaid Expenses and Other Current Assets [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory assets (1)	[2]	77	130
Other Current Liabilities [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory liabilities (7)	[3]	38	24
Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities	[4]	1,323	1,354
Removal Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		886	878
Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		316	232
Pension and Other Postretirement Plans Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[5]	725	646
Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[4]	33	48
Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[6]	227	211
Hurricane Harvey [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[7]	68	64
Natural Gas Distribution [Member] | Pension and Other Postretirement Plans Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Remaining amounts of regulatory assets for which no return on investment during recovery period is provided		4	7
Electric Transmission & Distribution [Member] | Pension and Other Postretirement Plans Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Remaining amounts of regulatory assets for which no return on investment during recovery period is provided		33	31
Houston Electric [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Securitized regulatory assets		1,059	1,590
Unrecognized equity return (2)	[1]	(213)	(287)
Unamortized loss on reacquired debt		68	75
Non-current regulatory assets		1,124	1,570
Total regulatory assets		1,124	1,570
Non-current regulatory liabilities		1,298	1,263
Total regulatory liabilities		1,315	1,285
Total regulatory assets and liabilities, net		(191)	285
Amount of allowed equity return on the true-up balance that was recognized in the period		74	42	$ 64
Houston Electric [Member] | Prepaid Expenses and Other Current Assets [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory assets (1)	[2]	0	0
Houston Electric [Member] | Other Current Liabilities [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory liabilities (7)	[3]	17	22
Houston Electric [Member] | Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities	[4]	847	862
Houston Electric [Member] | Removal Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		269	285
Houston Electric [Member] | Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		182	116
Houston Electric [Member] | Pension and Other Postretirement Plans Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[5]	33	31
Remaining amounts of regulatory assets for which no return on investment during recovery period is provided		33	31
Houston Electric [Member] | Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[4]	23	33
Houston Electric [Member] | Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[6]	90	70
Houston Electric [Member] | Hurricane Harvey [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[7]	64	58
CERC Corp [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Securitized regulatory assets		0	0
Unrecognized equity return (2)	[1]	0	0
Unamortized loss on reacquired debt		0	0
Non-current regulatory assets		181	181
Total regulatory assets		258	311
Non-current regulatory liabilities		1,227	1,201
Total regulatory liabilities		1,248	1,203
Total regulatory assets and liabilities, net		(990)	(892)
CERC Corp [Member] | Prepaid Expenses and Other Current Assets [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory assets (1)	[2]	77	130
CERC Corp [Member] | Other Current Liabilities [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Current regulatory liabilities (7)	[3]	21	2
CERC Corp [Member] | Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities	[4]	476	492
CERC Corp [Member] | Removal Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		617	593
CERC Corp [Member] | Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory liabilities		134	116
CERC Corp [Member] | Pension and Other Postretirement Plans Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[5]	30	20
Remaining amounts of regulatory assets for which no return on investment during recovery period is provided		4	7
CERC Corp [Member] | Amounts related to TCJA [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[4]	10	15
CERC Corp [Member] | Other Regulatory Assets (Liabilities) [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[6]	137	140
CERC Corp [Member] | Hurricane Harvey [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Non-current regulatory assets	[7]	$ 4	$ 6

[1] The unrecognized equity return will be recognized as it is recovered in rates through 2024. During the years ended December 31, 2018, 2017 and 2016, Houston Electric recognized approximately $74 million, $42 million and $64 million, respectively, of the allowed equity return. The timing of Houston Electric’s recognition of the equity return will vary each period based on amounts actually collected during the period. The actual amounts recognized are adjusted at least annually to correct any over-collections or under-collections during the preceding 12 months.

[2] Current regulatory assets are included in Prepaid expenses and other current assets in the Registrants’ respective Consolidated Balance Sheets.

[3] Current regulatory liabilities are included in Other current liabilities in each of the Registrants’ respective Consolidated Balance Sheets.

[4] The EDIT and deferred revenues will be recovered or refunded to customers as required by tax and regulatory authorities. See Note 15 for additional information.

[5] Includes a portion of Houston Electric’s and CERC’s NGD’s actuarially determined pension and other postemployment expense in excess of the amount being recovered through rates that is being deferred for rate making purposes, of which $33 million and $4 million as of December 31, 2018, respectively, and $31 million and $7 million as of December 31, 2017, respectively, were not earning a return.

[6] Other long-term regulatory assets that are not earning a return were not material as of December 31, 2018 and 2017.

[7] The Registrants suffered damage as a result of Hurricane Harvey, a major storm classified as a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale, that first struck the Texas coast on Friday, August 25, 2017 and remained over the Houston area for the next several days. The unprecedented flooding from torrential amounts of rainfall accompanying the storm caused significant damage to or destruction of residences and businesses served by the Registrants. The Registrants deferred the uninsured storm restoration costs as management believed it was probable that such costs will be recovered through traditional rate adjustment mechanisms for capital costs and through the next base rate proceeding for operation and maintenance expenses. As a result, storm restoration costs did not materially affect the Registrants’ reported net income for 2017. The Registrants are not earning a return on Hurricane Harvey restoration costs.

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Stock-Based Incentive Compensation Plans and Employee Benefit Plans Stock Based Incentive Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under long-term incentive plans (in shares)		14,000
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Income tax benefit recognized related to LTIPs		$ 6		$ 8	$ 7
Actual tax benefit realized for tax deductions		$ 5		$ 6	$ 5
Performance Awards [Member]
Summary of nonvested shares [Roll Forward]
Nonvested, beginning of period (in shares)	[1]	3,627
Granted (in shares)	[1]	1,321
Forfeited or cancelled (in shares)	[1]	(721)
Vested and released to participants (in shares)	[1]	(409)
Nonvested, end of period (in shares)	[1]	3,818		3,627
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share)	[1]	$ 22.15
Weighted average grant date fair values of awards granted (in dollars per share)		26.74	[1]	$ 26.64	$ 18.98
Weighted average grant date fair value, forfeited or cancelled (in dollars per share)	[1]	21.72
Weighted average grant date fair value, vested and released to participants (in dollars per share)	[1]	21.31
Weighted average grant date fair value, nonvested, end of period (in dollars per share)	[1]	$ 23.91		$ 22.15
Remaining average contractual life of nonvested shares outstanding (in years)	[1]	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested	[1],[2]	$ 57
Total intrinsic value of awards received by participants		12		$ 7	$ 7
Total grant date fair values of performance and stock awards which vested during the period		$ 9		$ 5	$ 7
Stock Awards [Member]
Summary of nonvested shares [Roll Forward]
Nonvested, beginning of period (in shares)		980
Granted (in shares)		409
Forfeited or cancelled (in shares)		(29)
Vested and released to participants (in shares)		(300)
Nonvested, end of period (in shares)		1,060		980
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share)		$ 22.68
Weighted average grant date fair values of awards granted (in dollars per share)		26.62		$ 26.77	$ 19.24
Weighted average grant date fair value, forfeited or cancelled (in dollars per share)		25.31
Weighted average grant date fair value, vested and released to participants (in dollars per share)		22.84
Weighted average grant date fair value, nonvested, end of period (in dollars per share)		$ 24.08		$ 22.68
Remaining average contractual life of nonvested shares outstanding (in years)		1 year 1 month
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested	[2]	$ 30
Total intrinsic value of awards received by participants		9		$ 9	$ 6
Total grant date fair values of performance and stock awards which vested during the period		7		7	6
Performance and Stock Awards [Member]
Summary of nonvested shares [Roll Forward]
Unrecognized compensation cost related to non-vested performance and stock awards		$ 27
Weighted average period of recognition (in years)		1 year 8 months
Operation And Maintenance Expense [Member]
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
LTIP compensation expense	[3]	$ 26		$ 21	$ 19

[1] Reflects maximum performance achievement.

[2] Reflects the impact of current expectations of achievement and stock price.

[3] Included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income and not capitalized as a part of Inventory or Property, Plant and Equipment.

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Stock-Based Incentive Compensation Plans and Employee Benefit Plans Pension and Postretirement Benefits (Details) - USD ($) $ in Millions						12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Pension and Postretirement Benefits [Abstract]
Percentage of eligible earnings used to determine retirement benefits (in hundredths)		5.00%				5.00%
Percent vested						100.00%
Pension plan minimum vesting period (in years)						3 years
Amounts recognized in balance sheets
Other liabilities-benefit obligations		$ (796)		$ (785)		$ (796)		$ (785)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Amortization of net loss	[1]					(6)		(7)
Prior service cost (2)	[1]					(1)		(1)
Pension Plan [Member]
Components of net periodic costs [Abstract]
Service cost (1)	[2]					37		36		$ 38
Interest cost (2)	[3]					79		89		93
Expected return on plan assets (2)	[3]					(107)		(97)		(101)
Amortization of prior service cost (credit)	[3]					9		9		9
Amortization of net loss (2)	[3]					43		58		63
Net periodic cost (credit)						$ 61		$ 95		$ 102
Assumptions used to determine net periodic benefit (income) cost
Discount rate						3.65%		4.15%		4.40%
Expected return on plan assets						6.00%	[4]	6.00%	[4]	6.25%
Rate of increase in compensation levels						4.45%		4.50%		4.15%
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year						$ 2,225		$ 2,197
Service cost (1)	[2]					37		36		$ 38
Interest cost (2)	[3]					79		89		93
Benefits paid						(201)		(168)
Actuarial (gain) loss (1)	[5]					(127)		71
Benefit obligation, end of year		2,013		2,225		2,013		2,225		2,197
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						1,801		1,656
Employer contributions						69		48
Benefits paid						(201)		(168)
Actual investment return						(153)		265
Fair value of plan assets, end of year		1,516		1,801		1,516		1,801		$ 1,656
Funded status of plan
Funded status, end of year		(497)		(424)		(497)		(424)
Amounts recognized in balance sheets
Current liabilities-other		(7)		(7)		(7)		(7)
Other liabilities-benefit obligations		(490)		(417)		(490)		(417)
Net liability, end of year		$ (497)		$ (424)		$ (497)		$ (424)
Discount rate (2)		4.35%	[6]	3.65%	[6]	4.35%	[6]	3.65%	[6]	4.15%
Expected return on plan assets (3)						6.00%	[4]	6.00%	[4]	6.25%
Rate of increase in compensation levels		4.60%		4.45%		4.60%		4.45%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate		3.75%		3.75%		3.75%		3.75%
Annualized individual discount rates based on time period, minimum						6 months
Annualized individual discount rates based on time period, maximum						99 years
Amounts recognized in accumulated other comprehensive loss
Unrecognized actuarial loss (gain)		$ 109		$ 94		$ 109		$ 94
Unrecognized prior service cost		1		1		1		1
Deferred Tax Benefit On Accumulated Other Comprehensive Income	[7]	0		0		0		0
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax		110		95		110		95
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net loss (gain)						22
Amortization of net loss						(6)
Prior service cost (2)						(1)
Total recognized in comprehensive income						15
Total expense recognized in net periodic cost and other comprehensive income						76
Pension benefits that have accumulated benefit obligations in excess of plan assets
Accumulated benefit obligation		1,930		2,090		1,930		2,090
Projected benefit obligation		1,952		2,151		1,952		2,151
Fair value of plan assets		1,516		1,801		1,516		1,801
Accumulated benefit obligation for all defined benefit pension plans		$ 1,991		$ 2,164		1,991		2,164
Postretirement Benefits [Member]
Components of net periodic costs [Abstract]
Service cost (1)	[8]					2		2		$ 2
Interest cost (2)	[9]					13		16		16
Expected return on plan assets (2)	[9]					(5)		(5)		(6)
Amortization of prior service cost (credit)	[9]					(5)		(5)		(3)
Amortization of net loss (2)	[9]					0		0		1
Curtailment (1)	[10]					0		0		(5)
Net periodic cost (credit)						$ 5		$ 8		$ 5
Assumptions used to determine net periodic benefit (income) cost
Discount rate						3.60%		4.15%		4.35%
Expected return on plan assets		4.60%	[11]	4.55%	[11]	4.55%		4.50%		4.80%
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year						$ 386		$ 383
Service cost (1)	[8]					2		2		$ 2
Interest cost (2)	[9]					13		16		16
Participant contributions						7		7
Benefits paid						(25)		(26)
Actuarial (gain) loss (1)	[12]					(52)		4
Benefit obligation, end of year		$ 331		$ 386		331		386		383
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						120		113
Employer contributions						14		16
Participant contributions						7		7
Benefits paid						(25)		(26)
Actual investment return						(2)		10
Fair value of plan assets, end of year		114		120		114		120		$ 113
Funded status of plan
Funded status, end of year		(217)		(266)		(217)		(266)
Amounts recognized in balance sheets
Current liabilities-other		(6)		(6)		(6)		(6)
Other liabilities-benefit obligations		(211)		(260)		(211)		(260)
Net liability, end of year		$ (217)		$ (266)		$ (217)		$ (266)
Discount rate (2)	[13]	4.35%		3.60%		4.35%		3.60%
Expected return on plan assets (3)		4.60%	[11]	4.55%	[11]	4.55%		4.50%		4.80%
Prescription drug cost trend rate assumed for the next year - Pre-65						9.20%		9.85%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.50%		4.50%		4.50%		4.50%
Annualized individual discount rates based on time period, minimum						6 months
Annualized individual discount rates based on time period, maximum						99 years
Amounts recognized in accumulated other comprehensive loss
Unrecognized actuarial loss (gain)		$ (7)		$ (8)		$ (7)		$ (8)
Unrecognized prior service cost		5		6		5		6
Deferred Tax Benefit On Accumulated Other Comprehensive Income	[7]	0		0		0		0
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax		(2)		(2)		(2)		(2)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net loss (gain)						0
Amortization of net loss						0
Prior service cost (2)						0
Total recognized in comprehensive income						0
Total expense recognized in net periodic cost and other comprehensive income						5
Non-qualified Pension Plan [Member]
Change in plan assets [Rollforward]
Employer contributions						9
Pension benefits that have accumulated benefit obligations in excess of plan assets
Accumulated benefit obligation		61		74		61		74
Projected benefit obligation		61		74		61		74
Fair value of plan assets		0		0		0		0
U.S. Equity [Member] | Pension Plan [Member]
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						76
Fair value of plan assets, end of year		60		76		60		76
Cash and Cash Equivalents [Member] | Pension Plan [Member]
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						18
Fair value of plan assets, end of year		$ 19		$ 18		$ 19		$ 18
Minimum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		5.95%		6.15%		5.95%		6.15%
Year that the cost trend rates reach the ultimate trend rate						2026		2026
Minimum [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		12.00%				12.00%
Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%				13.00%
Minimum [Member] | International Developed Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		7.00%				7.00%
Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		3.00%				3.00%
Minimum [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		5.00%				5.00%
Minimum [Member] | Fixed Income [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		55.00%				55.00%
Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		69.00%				69.00%
Minimum [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%				0.00%
Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%				0.00%
Maximum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		28.60%		23.85%		28.60%		23.85%
Year that the cost trend rates reach the ultimate trend rate						2027		2024
Maximum [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		28.00%				28.00%
Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		23.00%				23.00%
Maximum [Member] | International Developed Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		17.00%				17.00%
Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%				13.00%
Maximum [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		11.00%				11.00%
Maximum [Member] | Fixed Income [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		65.00%				65.00%
Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		79.00%				79.00%
Maximum [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%				2.00%
Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%				2.00%
Parent Company [Member] | Postretirement Benefits [Member]
Components of net periodic costs [Abstract]
Curtailment (1)										$ (2)
Houston Electric [Member]
Amounts recognized in balance sheets
Other liabilities-benefit obligations		$ (91)		$ (146)		$ (91)		$ (146)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Amortization of net loss	[1]					0		0
Prior service cost (2)	[1]					0		0
Houston Electric [Member] | Postretirement Benefits [Member]
Components of net periodic costs [Abstract]
Service cost (1)	[8]					0		1		1
Interest cost (2)	[9]					8		9		10
Expected return on plan assets (2)	[9]					(4)		(4)		(5)
Amortization of prior service cost (credit)	[9]					(5)		(6)		(4)
Amortization of net loss (2)	[9]					0		0		1
Curtailment (1)	[10]					0		0		(4)
Net periodic cost (credit)						$ (1)		$ 0		$ (1)
Assumptions used to determine net periodic benefit (income) cost
Discount rate						3.60%		4.15%		4.35%
Expected return on plan assets		4.70%	[11]	4.75%	[11]	4.75%		4.75%		5.00%
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year						$ 225		$ 217
Service cost (1)	[8]					0		1		$ 1
Interest cost (2)	[9]					8		9		10
Participant contributions						2		2
Benefits paid						(13)		(14)
Actuarial (gain) loss (1)	[12]					(56)		10
Benefit obligation, end of year		$ 166		$ 225		166		225		217
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						93		88
Employer contributions						9		10
Participant contributions						2		2
Benefits paid						(13)		(14)
Actual investment return						(2)		7
Fair value of plan assets, end of year		89		93		89		93		$ 88
Funded status of plan
Funded status, end of year		(77)		(132)		(77)		(132)
Amounts recognized in balance sheets
Current liabilities-other		0		0		0		0
Other liabilities-benefit obligations		(77)		(132)		(77)		(132)
Net liability, end of year		$ (77)		$ (132)		$ (77)		$ (132)
Discount rate (2)	[13]	4.35%		3.60%		4.35%		3.60%
Expected return on plan assets (3)		4.70%	[11]	4.75%	[11]	4.75%		4.75%		5.00%
Prescription drug cost trend rate assumed for the next year - Pre-65						9.20%		9.85%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.50%		4.50%		4.50%		4.50%
Annualized individual discount rates based on time period, minimum						6 months
Annualized individual discount rates based on time period, maximum						99 years
Houston Electric [Member] | Non-qualified Pension Plan [Member]
Change in plan assets [Rollforward]
Employer contributions						$ 0
Houston Electric [Member] | Minimum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		5.95%		6.15%		5.95%		6.15%
Year that the cost trend rates reach the ultimate trend rate						2026		2026
Houston Electric [Member] | Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%				13.00%
Houston Electric [Member] | Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		3.00%				3.00%
Houston Electric [Member] | Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		69.00%				69.00%
Houston Electric [Member] | Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%				0.00%
Houston Electric [Member] | Maximum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		28.60%		23.85%		28.60%		23.85%
Year that the cost trend rates reach the ultimate trend rate						2027		2024
Houston Electric [Member] | Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		23.00%				23.00%
Houston Electric [Member] | Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%				13.00%
Houston Electric [Member] | Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		79.00%				79.00%
Houston Electric [Member] | Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%				2.00%
CERC Corp [Member]
Amounts recognized in balance sheets
Other liabilities-benefit obligations		$ (93)		$ (97)		$ (93)		$ (97)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Amortization of net loss	[1]					0		0
Prior service cost (2)	[1]					(1)		(1)
CERC Corp [Member] | Postretirement Benefits [Member]
Components of net periodic costs [Abstract]
Service cost (1)	[8]					1		1		$ 1
Interest cost (2)	[9]					4		5		4
Expected return on plan assets (2)	[9]					(1)		(1)		(1)
Amortization of prior service cost (credit)	[9]					1		1		0
Amortization of net loss (2)	[9]					0		0		1
Curtailment (1)	[10]					0		0		(1)
Net periodic cost (credit)						$ 5		$ 6		$ 4
Assumptions used to determine net periodic benefit (income) cost
Discount rate						3.60%		4.15%		4.35%
Expected return on plan assets		4.15%	[11]	3.85%	[11]	3.85%		3.60%		3.95%
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year						$ 109		$ 115
Service cost (1)	[8]					1		1		$ 1
Interest cost (2)	[9]					4		5		4
Participant contributions						4		3
Benefits paid						(9)		(9)
Actuarial (gain) loss (1)	[12]					1		(6)
Benefit obligation, end of year		$ 110		$ 109		110		109		115
Change in plan assets [Rollforward]
Fair value of plan assets, beginning of year						26		25
Employer contributions						4		5
Participant contributions						4		3
Benefits paid						(9)		(9)
Actual investment return						0		2
Fair value of plan assets, end of year		25		26		25		26		$ 25
Funded status of plan
Funded status, end of year		(85)		(83)		(85)		(83)
Amounts recognized in balance sheets
Current liabilities-other		(3)		(4)		(3)		(4)
Other liabilities-benefit obligations		(82)		(79)		(82)		(79)
Net liability, end of year		$ (85)		$ (83)		$ (85)		$ (83)
Discount rate (2)	[13]	4.35%		3.60%		4.35%		3.60%
Expected return on plan assets (3)		4.15%	[11]	3.85%	[11]	3.85%		3.60%		3.95%
Prescription drug cost trend rate assumed for the next year - Pre-65						9.20%		9.85%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.50%		4.50%		4.50%		4.50%
Annualized individual discount rates based on time period, minimum						6 months
Annualized individual discount rates based on time period, maximum						99 years
Amounts recognized in accumulated other comprehensive loss
Unrecognized actuarial loss (gain)		$ (3)		$ (2)		$ (3)		$ (2)
Unrecognized prior service cost		5		6		5		6
Deferred Tax Benefit On Accumulated Other Comprehensive Income	[7]	(9)		(11)		(9)		(11)
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax		$ (7)		$ (7)		(7)		$ (7)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net loss (gain)						(1)
Amortization of net loss						0
Prior service cost (2)						(1)
Total recognized in comprehensive income						(2)
Total expense recognized in net periodic cost and other comprehensive income						3
CERC Corp [Member] | Non-qualified Pension Plan [Member]
Change in plan assets [Rollforward]
Employer contributions						$ 0
CERC Corp [Member] | Minimum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		5.95%		6.15%		5.95%		6.15%
Year that the cost trend rates reach the ultimate trend rate						2026		2026
CERC Corp [Member] | Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		15.00%				15.00%
CERC Corp [Member] | Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%				2.00%
CERC Corp [Member] | Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		68.00%				68.00%
CERC Corp [Member] | Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%				0.00%
CERC Corp [Member] | Maximum [Member] | Postretirement Benefits [Member]
Amounts recognized in balance sheets
Health care cost trend rate assumed for the next year		28.60%		23.85%		28.60%		23.85%
Year that the cost trend rates reach the ultimate trend rate						2027		2024
CERC Corp [Member] | Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		25.00%				25.00%
CERC Corp [Member] | Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		12.00%				12.00%
CERC Corp [Member] | Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		78.00%				78.00%
CERC Corp [Member] | Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%				2.00%
IBEW Local Union 66 [Member] | Houston Electric [Member] | Postretirement Benefits [Member]
Components of net periodic costs [Abstract]
Curtailment (1)										$ (3)

[1] Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

[2] Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

[3] Amounts presented in the table above are included in Other, net in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

[4] The expected rate of return assumption was developed using the targeted asset allocation of CenterPoint Energy’s plans and the expected return for each asset class.

[5] Significant sources of gain for 2018 include the increase in discount rate from 3.65% to 4.35% and the mortality projection scale change from MP2017 to MP2018. For 2017, the significant source of loss was the decrease in the discount rate from 4.15% to 3.65%.

[6] The discount rate assumption was determined by matching the projected cash flows of CenterPoint Energy’s plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

[7] CenterPoint Energy’s and CERC’s postretirement benefit obligation is reduced by the impact of previously non-taxable government subsidies under the Medicare Prescription Drug Act. Because the subsidies were non-taxable, the temporary difference used in measuring the deferred tax impact was determined on the unrecognized losses excluding such subsidies.

[8] Amounts presented in the table above are included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income, net of regulatory deferrals and amounts capitalized. See Note 2(r).

[9] Amounts presented in the table above are included in Other, net in each of the Registrants’ respective Statements of Consolidated Income, net of regulatory deferrals. See Note 2(r).

[10] A curtailment gain or loss is required when the expected future services of a significant number of current employees are reduced or eliminated for the accrual of benefits. During 2016, postretirement healthcare benefits were amended resulting in a net curtailment gain of $5 million. In May 2016, Houston Electric entered into a renegotiated collective bargaining agreement with the IBEW Local Union 66 that provides that for Houston Electric bargaining unit employees covered under the agreement who retire on or after January 1, 2017, retiree medical and prescription drug coverage will be provided exclusively through the NECA/IBEW Family Medical Care Plan in exchange for the payment of monthly premiums as determined under the agreement. As a result, the accrued postretirement benefits related to such future CenterPoint Energy and Houston Electric union retirees were eliminated. Houston Electric recognized a curtailment gain of $3 million as an accelerated recognition of the prior service credit that would otherwise be recognized in future periods for the postretirement plan. CenterPoint Energy also recognized an additional curtailment gain of $2 million in October 2016 related to other amendments in the postretirement plan.

[11] The expected rate of return assumption was developed using the targeted asset allocation of the plans and the expected return for each asset class.

[12] Significant sources of gain for 2018 include the increase in the discount rate from 3.60% to 4.35%, favorable benefit claims experience and cost trend rates in addition to the change in mortality projection scale from MP2017 to MP2018.

[13] The discount rate assumption was determined by matching the projected cash flows of the plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

XML

Stock-Based Incentive Compensation Plans and Employee Benefit Plans Plan Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Savings Plan [Abstract]
Maximum percentage of eligible compensation employees may contribute to the savings plan (in hundredths)		50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
Defined Contribution Plan, Cost		$ 43		$ 41		$ 38
Postemployment Benefits [Abstract]
Postemployment Benefits, Period Expense		3		6		5
Other Non-Qualified Plans [Abstract]
Benefit expense related to deferred compensation plans		3		$ 3		$ 3
Non-qualified Pension Plan [Member]
Total contributions to the plans during the period		9
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 7
Pension Plan [Member]
Discount Rate		4.35%	[1]	3.65%	[1]	4.15%
Plan assets, fair value		$ 1,516		$ 1,801		$ 1,656
Defined Benefits Plan, Fair Value Of Plan Assets, Excluding Investments Measured at Net Asset Value		860		877
Obligation To Return Cash Received As Collateral From Securities Lending,		(77)		(76)
Defined Benefit Plan, Contribution by Employer, Qualified Plan		60
Total contributions to the plans during the period		69		$ 48
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		86
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Pension benefit payments 2019		141
Pension benefit payments 2020		146
Pension benefit payments 2021		154
Pension benefit payments 2022		155
Pension benefit payments 2023		156
Pension benefit payments 2024 - 2028		$ 759
Other Non-Qualified Plans [Abstract]
Annualized individual discount rates based on time period, minimum		6 months
Annualized individual discount rates based on time period, maximum		99 years
Postretirement Benefits [Member]
Discount Rate	[2]	4.35%		3.60%
Plan assets, fair value		$ 114		$ 120		113
Total contributions to the plans during the period		14		16
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		17
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Pension benefit payments 2019		16
Pension benefit payments 2020		19
Pension benefit payments 2021		20
Pension benefit payments 2022		21
Pension benefit payments 2023		22
Pension benefit payments 2024 - 2028		$ 116
Other Non-Qualified Plans [Abstract]
Annualized individual discount rates based on time period, minimum		6 months
Annualized individual discount rates based on time period, maximum		99 years
Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		$ 442		372
Obligation To Return Cash Received As Collateral From Securities Lending,		(77)		(76)
Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		418		505
Obligation To Return Cash Received As Collateral From Securities Lending,		0		0
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Obligation To Return Cash Received As Collateral From Securities Lending,		0		0
U.S. Equity [Member] | Pension Plan [Member]
Plan assets, fair value		60		76
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		60		76
U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
U.S. Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Cash and Cash Equivalents [Member] | Pension Plan [Member]
Plan assets, fair value		19		18
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		19		18
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Common Collective Trust Funds [Member] | Pension Plan [Member]
Plan assets, fair value	[3],[4]	$ 656		$ 924
Common Collective Trust Funds [Member] | International Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		37.00%		34.00%
Common Collective Trust Funds [Member] | Fixed Income Funds [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		54.00%		55.00%
Common Collective Trust Funds [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		5.00%		6.00%
Common Collective Trust Funds [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		4.00%		5.00%
Investment grade or above [Member] | Pension Plan [Member]
Plan assets, fair value		$ 368		$ 432
Investment grade or above [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Investment grade or above [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		368		432
Investment grade or above [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Cash received as collateral from securities [Member] | Pension Plan [Member]
Plan assets, fair value		77		76
Cash received as collateral from securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		77		76
Cash received as collateral from securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Cash received as collateral from securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
U.S. treasuries [Member] | Pension Plan [Member]
Plan assets, fair value		196		67
U.S. treasuries [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		196		67
U.S. treasuries [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
U.S. treasuries [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Mortgage backed securities [Member] | Pension Plan [Member]
Plan assets, fair value		6		8
Mortgage backed securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Mortgage backed securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		6		8
Mortgage backed securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Asset backed securities [Member] | Pension Plan [Member]
Plan assets, fair value		1		1
Asset backed securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Asset backed securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		1		1
Asset backed securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Municipal bonds [Member] | Pension Plan [Member]
Plan assets, fair value		27		47
Municipal bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Municipal bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		27		47
Municipal bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Mutual funds [Member] | Pension Plan [Member]
Plan assets, fair value		167		211
Mutual funds [Member] | Postretirement Benefits [Member]
Plan assets, fair value		$ 114		$ 120
Mutual funds [Member] | International Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		51.00%		57.00%
Mutual funds [Member] | International Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		7.00%		8.00%
Mutual funds [Member] | Fixed Income Funds [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		0.00%		0.00%
Mutual funds [Member] | Fixed Income Funds [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		74.00%		74.00%
Mutual funds [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		15.00%		13.00%
Mutual funds [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		19.00%		18.00%
Mutual funds [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		34.00%		30.00%
Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		$ 167		$ 211
Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		114		120
Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
International government bonds [Member] | Pension Plan [Member]
Plan assets, fair value		16		17
International government bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
International government bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Plan assets, fair value		16		17
International government bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Plan assets, fair value		0		0
Benefit Obligation [Member]
Postemployment Benefits [Abstract]
Postemployment benefit obligations		11		20
Other Non-Qualified Plans [Abstract]
Other non-qualified plans benefit obligations deferred compensation		42		45
Benefit obligations related to split-dollar life insurance arrangements		$ 36		39
Minimum [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		12.00%
Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%
Minimum [Member] | International Developed Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		7.00%
Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		3.00%
Minimum [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		5.00%
Minimum [Member] | Fixed Income [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		55.00%
Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		69.00%
Minimum [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%
Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%
Maximum [Member] | U.S. Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		28.00%
Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		23.00%
Maximum [Member] | International Developed Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		17.00%
Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%
Maximum [Member] | Emerging Market Equity [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		11.00%
Maximum [Member] | Fixed Income [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		65.00%
Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		79.00%
Maximum [Member] | Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%
Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%
Common Stock [Member] | CenterPoint Energy [Member]
Savings Plan [Abstract]
Defined Contribution Plan, Maximum Limit Of Account Balance In Company Stock, Percentage		25.00%
Number of Common stock held by the savings plan (in shares)		12,062,915
Percentage of investment in common stocks (in hundredths)		16.00%
Houston Electric [Member]
Savings Plan [Abstract]
Maximum percentage of eligible compensation employees may contribute to the savings plan (in hundredths)		50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
Defined Contribution Plan, Cost		$ 17		17		15
Postemployment Benefits [Abstract]
Postemployment Benefits, Period Expense		4		1		3
Other Non-Qualified Plans [Abstract]
Benefit expense related to deferred compensation plans		1		$ 1		1
Houston Electric [Member] | Non-qualified Pension Plan [Member]
Total contributions to the plans during the period		0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		0
Houston Electric [Member] | Pension Plan [Member]
Defined Benefit Plan, Contribution by Employer, Qualified Plan		0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 0
Houston Electric [Member] | Postretirement Benefits [Member]
Discount Rate	[2]	4.35%		3.60%
Plan assets, fair value		$ 89		$ 93		88
Total contributions to the plans during the period		9		10
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		10
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Pension benefit payments 2019		9
Pension benefit payments 2020		10
Pension benefit payments 2021		11
Pension benefit payments 2022		11
Pension benefit payments 2023		12
Pension benefit payments 2024 - 2028		$ 61
Other Non-Qualified Plans [Abstract]
Annualized individual discount rates based on time period, minimum		6 months
Annualized individual discount rates based on time period, maximum		99 years
Houston Electric [Member] | Mutual funds [Member] | Postretirement Benefits [Member]
Plan assets, fair value		$ 89		$ 93
Houston Electric [Member] | Mutual funds [Member] | International Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		7.00%		8.00%
Houston Electric [Member] | Mutual funds [Member] | Fixed Income Funds [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		74.00%		74.00%
Houston Electric [Member] | Mutual funds [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		19.00%		18.00%
Houston Electric [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		$ 89		$ 93
Houston Electric [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
Houston Electric [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
Houston Electric [Member] | Benefit Obligation [Member]
Postemployment Benefits [Abstract]
Postemployment benefit obligations		3		3
Other Non-Qualified Plans [Abstract]
Other non-qualified plans benefit obligations deferred compensation		9		10
Benefit obligations related to split-dollar life insurance arrangements		$ 1		1
Houston Electric [Member] | Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%
Houston Electric [Member] | Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		3.00%
Houston Electric [Member] | Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		69.00%
Houston Electric [Member] | Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%
Houston Electric [Member] | Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		23.00%
Houston Electric [Member] | Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		13.00%
Houston Electric [Member] | Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		79.00%
Houston Electric [Member] | Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%
Houston Electric [Member] | Common Stock [Member] | CenterPoint Energy [Member]
Savings Plan [Abstract]
Defined Contribution Plan, Maximum Limit Of Account Balance In Company Stock, Percentage		25.00%
Number of Common stock held by the savings plan (in shares)		12,062,915
Percentage of investment in common stocks (in hundredths)		16.00%
CERC Corp [Member]
Savings Plan [Abstract]
Maximum percentage of eligible compensation employees may contribute to the savings plan (in hundredths)		50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
Defined Contribution Plan, Cost		$ 18		17		16
Postemployment Benefits [Abstract]
Postemployment Benefits, Period Expense		1		4		3
Other Non-Qualified Plans [Abstract]
Benefit expense related to deferred compensation plans		0		$ 0		0
CERC Corp [Member] | Non-qualified Pension Plan [Member]
Total contributions to the plans during the period		0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		0
CERC Corp [Member] | Pension Plan [Member]
Defined Benefit Plan, Contribution by Employer, Qualified Plan		0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 0
CERC Corp [Member] | Postretirement Benefits [Member]
Discount Rate	[2]	4.35%		3.60%
Plan assets, fair value		$ 25		$ 26		$ 25
Total contributions to the plans during the period		4		5
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		4
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Pension benefit payments 2019		5
Pension benefit payments 2020		6
Pension benefit payments 2021		6
Pension benefit payments 2022		7
Pension benefit payments 2023		7
Pension benefit payments 2024 - 2028		$ 37
Other Non-Qualified Plans [Abstract]
Annualized individual discount rates based on time period, minimum		6 months
Annualized individual discount rates based on time period, maximum		99 years
CERC Corp [Member] | Mutual funds [Member] | Postretirement Benefits [Member]
Plan assets, fair value		$ 25		$ 26
CERC Corp [Member] | Mutual funds [Member] | International Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		6.00%		8.00%
CERC Corp [Member] | Mutual funds [Member] | Fixed Income Funds [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		73.00%		71.00%
CERC Corp [Member] | Mutual funds [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		21.00%		21.00%
CERC Corp [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		$ 25		$ 26
CERC Corp [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
CERC Corp [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member] | Postretirement Benefits [Member]
Plan assets, fair value		0		0
CERC Corp [Member] | Benefit Obligation [Member]
Postemployment Benefits [Abstract]
Postemployment benefit obligations		7		14
Other Non-Qualified Plans [Abstract]
Other non-qualified plans benefit obligations deferred compensation		3		3
Benefit obligations related to split-dollar life insurance arrangements		$ 0		$ 0
CERC Corp [Member] | Minimum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		15.00%
CERC Corp [Member] | Minimum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%
CERC Corp [Member] | Minimum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		68.00%
CERC Corp [Member] | Minimum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		0.00%
CERC Corp [Member] | Maximum [Member] | U.S. Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		25.00%
CERC Corp [Member] | Maximum [Member] | International Developed Market Equity [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		12.00%
CERC Corp [Member] | Maximum [Member] | Fixed Income [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		78.00%
CERC Corp [Member] | Maximum [Member] | Cash and Cash Equivalents [Member] | Postretirement Benefits [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		2.00%
CERC Corp [Member] | Common Stock [Member] | CenterPoint Energy [Member]
Savings Plan [Abstract]
Defined Contribution Plan, Maximum Limit Of Account Balance In Company Stock, Percentage		25.00%
Number of Common stock held by the savings plan (in shares)		12,062,915
Percentage of investment in common stocks (in hundredths)		16.00%

[1] The discount rate assumption was determined by matching the projected cash flows of CenterPoint Energy’s plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

[2] The discount rate assumption was determined by matching the projected cash flows of the plans against a hypothetical yield curve of high-quality corporate bonds represented by a series of annualized individual discount rates from one-half to 99 years.

[3] Represents investments in common collective trust funds.

[4] The amounts invested in mutual funds and common collective trust funds were allocated as follows: As of December 31, 2018 2017 Mutual Funds Common Collective Trust Funds Mutual Funds Common Collective Trust FundsInternational equities51% 37% 57% 34%Emerging market equities34% 4% 30% 5%U.S. equities15% 5% 13% 6%Fixed income— 54% — 55%

XML

Stock-Based Incentive Compensation Plans and Employee Benefit Plans Change in Control Agreements and Other Employee Matters (Details)	12 Months Ended
	Dec. 31, 2018 salary_severance_benefits
Concentration Risk [Line Items]
Maximum Number Of Times Annual Salary Included In Severance Benefits	3
Workforce Subject to Collective Bargaining Arrangements Expiring in May 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	18.00%
Workforce Subject to Collective Bargaining Arrangements Expiring in March and May 2021 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	3.00%
Workforce Subject to Collective Bargaining Arrangements Expiring in April 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	6.00%
Workforce Subject to Collective Bargaining Arrangements Expiring in December 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	3.00%
Workforce Subject to Collective Bargaining Arrangements Expiring in June and July 2022 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	5.00%
Workforce Subject to Collective Bargaining Arrangements [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	35.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in May 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	51.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in March and May 2021 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in April 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in December 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in June and July 2022 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
Houston Electric [Member] | Workforce Subject to Collective Bargaining Arrangements [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	51.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in May 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in March and May 2021 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	3.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in April 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	12.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in December 2020 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	7.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements Expiring in June and July 2022 [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	11.00%
CERC Corp [Member] | Workforce Subject to Collective Bargaining Arrangements [Member] | Employees Subject To Collective Bargaining Agreements [Member] | Labor Force Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	33.00%

XML

Derivative Instruments Derivatives and Hedging (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Weather hedges term		10 years
Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member]
Recognized gain (loss) on weather hedges	[1]	$ (4)	$ (1)	$ 1
2018 to 2019 [Member] | Natural Gas Distribution [Member]
Weather hedge bilateral cap amount		9
2018 to 2019 [Member] | Electric Transmission & Distribution [Member]
Weather hedge bilateral cap amount		8
2018 to 2019 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Natural Gas Distribution [Member]
Recognized gain (loss) on weather hedges		0	0	0
2018 to 2019 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Electric Transmission & Distribution [Member]
Recognized gain (loss) on weather hedges		0	0	0
2017 to 2018 [Member] | Natural Gas Distribution [Member]
Weather hedge bilateral cap amount		8
2017 to 2018 [Member] | Electric Transmission & Distribution [Member]
Weather hedge bilateral cap amount		9
2017 to 2018 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Natural Gas Distribution [Member]
Recognized gain (loss) on weather hedges		(2)	0	0
2017 to 2018 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Electric Transmission & Distribution [Member]
Recognized gain (loss) on weather hedges		(2)	0	0
2016 to 2017 [Member] | Electric Transmission & Distribution [Member]
Weather hedge bilateral cap amount		9
2016 to 2017 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Electric Transmission & Distribution [Member]
Recognized gain (loss) on weather hedges		$ 0	(1)	1
CERC Corp [Member]
Weather hedges term		10 years
CERC Corp [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member]
Recognized gain (loss) on weather hedges	[1]	$ (2)	0	0
CERC Corp [Member] | 2018 to 2019 [Member] | Natural Gas Distribution [Member]
Weather hedge bilateral cap amount		9
CERC Corp [Member] | 2018 to 2019 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Natural Gas Distribution [Member]
Recognized gain (loss) on weather hedges		0	0	0
CERC Corp [Member] | 2017 to 2018 [Member] | Natural Gas Distribution [Member]
Weather hedge bilateral cap amount		8
CERC Corp [Member] | 2017 to 2018 [Member] | Gains (Losses) in Revenue [Member] | Weather Hedge Swaps [Member] | Natural Gas Distribution [Member]
Recognized gain (loss) on weather hedges		(2)	0	$ 0
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Aggregate notional amount		450	0
Cash Flow Hedging [Member] | CERC Corp [Member] | Interest Rate Contract [Member]
Aggregate notional amount		$ 450	$ 0

[1] Weather hedge gains (losses) are recorded in Revenues in the Statements of Consolidated Income.

XML

Derivative Instruments Summary of Derivative Activity (Details) $ in Millions		12 Months Ended
		Dec. 31, 2018 USD ($) Bcf	Dec. 31, 2017 USD ($) Bcf		Dec. 31, 2016 USD ($)
Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume notional amount (in Bcf) | Bcf		1,674	1,795
Gross Amounts Recognized	[1]	$ 12	$ 111
Gross Amounts Offset in the Consolidated Balance Sheets		19	19
Net Amount Presented in the Consolidated Balance Sheets	[2]	31	130
Derivative Assets Fair Value		220	218
Derivative Liabilities Fair Value		833	775
Derivative Asset		57	80
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		1	14
Income Statement Impact of Derivative Activity [Abstract]
Total amounts presented in the statements of income in which the effects of hedges are recorded	[3]	4,364	3,785		$ 1,983
Gain (loss) on derivative instruments not designated as hedging instruments		(123)	260		(431)
Derivative, Credit Risk Related Contingent Features [Abstract]
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position		1	2
Fair value of collateral already posted		0	0
Additional collateral required to be posted if credit risk contingent features triggered		0	2
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4]	138	154
Energy Marketers [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4]	24	45
Retail End Users [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4],[5]	114	109
External Credit Rating, Investment Grade [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[6]	41	23
External Credit Rating, Investment Grade [Member] | Energy Marketers [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[6]	11	6
External Credit Rating, Investment Grade [Member] | Retail End Users [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[5],[6]	30	17
Current Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset	[2]	100	110
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		1	14
Gross Amounts Recognized	[1]	166	165
Gross Amounts Offset		(66)	(55)
Other Noncurrent Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset	[2]	38	44
Gross Amounts Recognized	[1]	54	53
Gross Amounts Offset		(16)	(9)
Current Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gross Amounts Recognized	[1]	(183)	(83)
Gross Amounts Offset		81	63
Derivative Liability	[2]	(102)	(20)
Other Noncurrent Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gross Amounts Recognized	[1]	(25)	(24)
Gross Amounts Offset		20	20
Derivative Liability	[2]	(5)	(4)
Not Designated as Hedging Instrument [Member] | Current Liabilities [Member] | IDS Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value		0	0
Derivative Liabilities Fair Value		$ 601	$ 668
Long [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume notional amount (in Bcf) | Bcf		140	224
Houston Electric [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value		$ 0	$ 0
Derivative Liabilities Fair Value		$ 24	$ 0
CERC Corp [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume notional amount (in Bcf) | Bcf		1,674	1,795
Gross Amounts Recognized	[1]	$ 12	$ 111
Gross Amounts Offset in the Consolidated Balance Sheets		19	19
Net Amount Presented in the Consolidated Balance Sheets	[2]	31	130
CERC Corp [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value		220	218
Derivative Liabilities Fair Value		208	107
Derivative Asset		57	80
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		1	14
Income Statement Impact of Derivative Activity [Abstract]
Total amounts presented in the statements of income in which the effects of hedges are recorded		4,364	3,785		1,983
Gain (loss) on derivative instruments not designated as hedging instruments		107	211		(18)
Derivative, Credit Risk Related Contingent Features [Abstract]
Aggregate fair value of derivatives containing material adverse change provisions in a net liability position		1	2
Fair value of collateral already posted		0	0
Additional collateral required to be posted if credit risk contingent features triggered		0	2
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4]	138	154
CERC Corp [Member] | Energy Marketers [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4]	24	45
CERC Corp [Member] | Retail End Users [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[4],[5]	114	109
CERC Corp [Member] | External Credit Rating, Investment Grade [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[6]	41	23
CERC Corp [Member] | External Credit Rating, Investment Grade [Member] | Energy Marketers [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties		11	6	[6]
CERC Corp [Member] | External Credit Rating, Investment Grade [Member] | Retail End Users [Member]
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Total credit risk of counterparties	[5]	30	17	[6]
CERC Corp [Member] | Current Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset	[2]	100	110
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Item		1	14
Gross Amounts Recognized	[1]	166	165
Gross Amounts Offset		(66)	(55)
CERC Corp [Member] | Other Noncurrent Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset	[2]	38	44
Gross Amounts Recognized	[1]	54	53
Gross Amounts Offset		(16)	(9)
CERC Corp [Member] | Current Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gross Amounts Recognized	[1]	(183)	(83)
Gross Amounts Offset		81	63
Derivative Liability	[2]	(102)	(20)
CERC Corp [Member] | Other Noncurrent Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gross Amounts Recognized	[1]	(25)	(24)
Gross Amounts Offset		20	20
Derivative Liability	[2]	(5)	(4)
CERC Corp [Member] | Not Designated as Hedging Instrument [Member] | Current Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	[7],[8],[9]	103	114
Derivative Liabilities Fair Value	[7],[8],[9]	3	4
CERC Corp [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	[7],[8],[9]	38	44
Derivative Liabilities Fair Value	[7],[8],[9]	0	0
CERC Corp [Member] | Not Designated as Hedging Instrument [Member] | Current Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	[7],[8],[9]	62	38
Derivative Liabilities Fair Value	[7],[8],[9]	173	78
CERC Corp [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	[7],[8],[9]	16	9
Derivative Liabilities Fair Value	[7],[8],[9]	$ 25	$ 24
CERC Corp [Member] | Long [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative gross volume notional amount (in Bcf) | Bcf		140	224
Cash Flow Hedging [Member] | Houston Electric [Member] | Designated as Hedging Instrument [Member] | Current Liabilities [Member] | Interest Rate Contract [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value		$ 0	$ 0
Derivative Liabilities Fair Value		24	0
Fair Value Hedging [Member] | Current Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset		57	80
Fair Value Hedging [Member] | CERC Corp [Member] | Current Assets [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset		57	80
Fair Value Hedging [Member] | CERC Corp [Member] | Designated as Hedging Instrument [Member] | Current Liabilities [Member] | Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets Fair Value	[7],[8],[9]	1	13
Derivative Liabilities Fair Value	[7],[8],[9]	7	1
Gains (Losses) in Revenue [Member] | CERC Corp [Member] | Energy Related Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Gain (loss) on derivative instruments not designated as hedging instruments		107	211		(18)
Natural Gas Expenses [Member] | Fair Value Hedging [Member] | Energy Related Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Change in unrealized gain (loss) on fair value hedging instruments	[3]	(13)	14		0
Amounts excluded from effectiveness testing recognized in earnings immediately (1)	[3],[10]	(149)	(67)		70
Natural Gas Expenses [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Energy Related Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Change in unrealized gain (loss) on fair value hedging instruments	[3]	13	(14)		0
Natural Gas Expenses [Member] | Fair Value Hedging [Member] | CERC Corp [Member] | Energy Related Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Change in unrealized gain (loss) on fair value hedging instruments	[3]	(13)	14		0
Amounts excluded from effectiveness testing recognized in earnings immediately (1)	[3],[10]	(149)	(67)		70
Natural Gas Expenses [Member] | Fair Value Hedging [Member] | CERC Corp [Member] | Designated as Hedging Instrument [Member] | Energy Related Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Change in unrealized gain (loss) on fair value hedging instruments	[3]	13	(14)		0
Gains (Losses) in Other Income (Expense) [Member] | Interest Rate Contract [Member]
Income Statement Impact of Derivative Activity [Abstract]
Gain (loss) on derivative instruments not designated as hedging instruments		2	0		0
Gains (Losses) in Other Income (Expense) [Member] | IDS Derivative [Member]
Income Statement Impact of Derivative Activity [Abstract]
Gain (loss) on derivative instruments not designated as hedging instruments		$ (232)	$ 49		$ (413)

[1] Gross amounts recognized include some derivative assets and liabilities that are not subject to master netting arrangements.

[2] The derivative assets and liabilities on the Consolidated Balance Sheets exclude accounts receivable or accounts payable that, should they exist, could be used as offsets to these balances in the event of a default.

[3] Income statement impact associated with cash flow hedge activity is related to gains and losses reclassified from Accumulated other comprehensive income into income. Amounts are immaterial for the Registrants for the years ended December 31, 2018, 2017 and 2016, respectively.

[4] The amounts reflected in the table above were not impacted by collateral netting.

[5] End users are comprised primarily of customers who have contracted to fix the price of a portion of their physical gas requirements for future periods.

[6] “Investment grade” is primarily determined using publicly available credit ratings and considers credit support (including parent company guarantees) and collateral (including cash and standby letters of credit). For unrated counterparties, CenterPoint Energy and CERC determine a synthetic credit rating by performing financial statement analysis and consider contractual rights and restrictions and collateral.

[7] Derivative Assets and Derivative Liabilities include no material amounts related to physical forward transactions with Enable.

[8] Natural gas contracts are presented on a net basis in the Consolidated Balance Sheets as they are subject to master netting arrangements. This netting applies to all undisputed amounts due or past due and causes derivative assets (liabilities) to be ultimately presented net in a liability (asset) account within the Consolidated Balance Sheets. The net of total non-trading natural gas derivative assets and liabilities is detailed in the Offsetting of Natural Gas Derivative Assets and Liabilities table below

[9] The fair value shown for natural gas contracts is comprised of derivative gross volumes totaling 1,674 Bcf or a net 140 Bcf long position and 1,795 Bcf or a net 224 Bcf long position as of December 31, 2018 and 2017, respectively. Certain natural gas contracts hedge basis risk only and lack a fixed price exposure.

[10] Upon adoption of ASU 2017-12 effective January 1, 2018 (see Note 2 for additional information), CenterPoint Energy and CERC elected to exclude from their assessment of hedge effectiveness the natural gas market price difference between locations of the hedged inventory and the delivery location specified in the hedge instruments. Prior to the adoption of this accounting guidance, the timing difference between the spot price and the futures price, as well as the difference between the timing of the settlement of the futures and the valuation of the underlying physical commodity, was excluded from the assessment of effectiveness for CenterPoint Energy’s and CERC’s existing fair value hedges and will continue to be excluded from the assessment of hedge effectiveness. CenterPoint Energy and CERC elected to continue to immediately recognize amounts excluded from hedge effectiveness in their respective Statements of Consolidated Income.

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Fair Value Measurements (Details) $ in Millions		12 Months Ended
		Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)
Assets
Natural gas derivatives (3)(4)		$ 57		$ 80
Total derivative assets, netting adjustment	[1]	(82)		(64)
Total assets		747		1,199
Liabilities
Total derivative liabilities, netting adjustment	[1]	(101)		(83)
Total liabilities		732		692
Fair value measurement using significant unobservable input (level 3) reconciliation [Roll Forward]
Beginning balance		(622)	[2]	(704)	[2]	$ 12
Purchases (1)	[3]	0		0		12
Total gains (losses)		30		96		12
Total settlements		(39)		(11)		(27)
Transfers into Level 3 (2)	[4]	5		14		(712)
Transfers out of Level 3 (3)	[5]	656		(17)		(1)
Ending balance (4)	[2]	30		(622)		(704)
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date (3)		$ 18		87		(402)
Atmos Energy Marketing [Member]
Fair value measurement using significant unobservable input (level 3) reconciliation [Roll Forward]
Mark-to-market value of Level 3 derivative assets acquired		less than $1 million
Carrying amount [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities	[6]	$ 9,140		8,679
Fair value [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities	[6]	9,308		9,220
Natural gas [Member]
Liabilities
Derivative fair value offsets, net		19		19
Fair Value, Inputs, Level 1 [Member]
Assets
Total assets	[7]	609		1,045
Liabilities
Total liabilities	[7]	24		0
Fair Value, Inputs, Level 2 [Member]
Assets
Total assets		173		161
Liabilities
Total liabilities		792		96
Fair Value, Inputs, Level 3 [Member]
Assets
Total assets		47		57
Liabilities
Total liabilities		$ 17		679
Fair Value, Inputs, Level 3 [Member] | Forward Contracts [Member] | Minimum [Member]
Fair Value, assets and liabilities measured on recurring basis, financial statement captions
Fair value inputs (price per MMBtu)		1.39
Fair Value, Inputs, Level 3 [Member] | Forward Contracts [Member] | Maximum [Member]
Fair Value, assets and liabilities measured on recurring basis, financial statement captions
Fair value inputs (price per MMBtu)		5.96
Fair Value, Measurements, Recurring [Member]
Assets
Corporate equities		$ 542		963
Investments, including money market funds (2)	[8]	66		68
Hedged portion of natural gas inventory		1		14
Fair Value, Measurements, Recurring [Member] | Natural gas [Member]
Assets
Natural gas derivative netting adjustment	[1],[9]	(82)		(64)
Natural gas derivatives (3)(4)	[9]	138		154
Liabilities
Derivative liabilities, netting adjustment	[1],[9]	(101)		(83)
Derivative liabilities	[9]	107		24
Fair Value, Measurements, Recurring [Member] | IDS Derivative [Member]
Liabilities
Derivative liabilities, netting adjustment	[1]	0		0
Derivative liabilities		601		668
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		24		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Corporate equities	[7]	542		963
Investments, including money market funds (2)	[7],[8]	66		68
Hedged portion of natural gas inventory	[7]	1		14
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[7],[9]	0		0
Liabilities
Derivative liabilities	[7],[9]	0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | IDS Derivative [Member]
Liabilities
Derivative liabilities	[7]	0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities	[7]	24		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Corporate equities		0		0
Investments, including money market funds (2)	[8]	0		0
Hedged portion of natural gas inventory		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[9]	173		161
Liabilities
Derivative liabilities	[9]	191		96
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | IDS Derivative [Member]
Liabilities
Derivative liabilities		601		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Corporate equities		0		0
Investments, including money market funds (2)	[8]	0		0
Hedged portion of natural gas inventory		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[9]	47		57
Liabilities
Derivative liabilities	[9]	17		11
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | IDS Derivative [Member]
Liabilities
Derivative liabilities		0		668
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		0		0
Houston Electric [Member]
Assets
Total derivative assets, netting adjustment		0		0
Total assets		48		51
Liabilities
Total derivative liabilities, netting adjustment		0		0
Total liabilities		24		0
Houston Electric [Member] | Carrying amount [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities	[6]	4,717		4,753
Houston Electric [Member] | Fair value [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities	[6]	4,770		5,034
Houston Electric [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Total assets		48		51
Liabilities
Total liabilities		24		0
Houston Electric [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Total assets		0		0
Liabilities
Total liabilities		0		0
Houston Electric [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Total assets		0		0
Liabilities
Total liabilities		0		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Investments, including money market funds (2)	[8]	48		51
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		24		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Investments, including money market funds (2)	[8]	48		51
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		24		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Investments, including money market funds (2)	[8]	0		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		0		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Investments, including money market funds (2)	[8]	0		0
Houston Electric [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Liabilities
Derivative liabilities		0		0
CERC Corp [Member]
Assets
Natural gas derivatives (3)(4)		57		80
Total derivative assets, netting adjustment	[1]	(82)		(64)
Total assets		152		182
Liabilities
Total derivative liabilities, netting adjustment	[1]	(101)		(83)
Total liabilities		107		24
Fair value measurement using significant unobservable input (level 3) reconciliation [Roll Forward]
Beginning balance		46	[2]	13	[2]	12
Purchases (1)	[3]	0		0		12
Total gains (losses)		30		47		12
Total settlements		(39)		(11)		(27)
Transfers into Level 3 (2)	[4]	5		14		5
Transfers out of Level 3 (3)	[5]	(12)		(17)		(1)
Ending balance (4)	[2]	30		46		13
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date (3)		18		38		$ 11
CERC Corp [Member] | Carrying amount [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities		2,371		2,457
CERC Corp [Member] | Fair value [Member]
Estimated Fair Value of Financial Instruments
Long-term debt, including current maturities		2,488		2,708
CERC Corp [Member] | Natural gas [Member]
Liabilities
Derivative fair value offsets, net		19		19
CERC Corp [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Total assets	[7]	14		28
Liabilities
Total liabilities	[7]	0		0
CERC Corp [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Total assets		173		161
Liabilities
Total liabilities		191		96
CERC Corp [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Total assets		47		57
Liabilities
Total liabilities		$ 17		11
CERC Corp [Member] | Fair Value, Inputs, Level 3 [Member] | Forward Contracts [Member] | Minimum [Member]
Fair Value, assets and liabilities measured on recurring basis, financial statement captions
Fair value inputs (price per MMBtu)		1.39
CERC Corp [Member] | Fair Value, Inputs, Level 3 [Member] | Forward Contracts [Member] | Maximum [Member]
Fair Value, assets and liabilities measured on recurring basis, financial statement captions
Fair value inputs (price per MMBtu)		5.96
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Corporate equities		$ 2		3
Investments, including money market funds (2)	[8]	11		11
Hedged portion of natural gas inventory		1		14
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Natural gas [Member]
Assets
Natural gas derivative netting adjustment	[1],[9]	(82)		(64)
Natural gas derivatives (3)(4)	[9]	138		154
Liabilities
Derivative liabilities, netting adjustment	[1],[9]	(101)		(83)
Derivative liabilities	[9]	107		24
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Corporate equities	[7]	2		3
Investments, including money market funds (2)	[7],[8]	11		11
Hedged portion of natural gas inventory	[7]	1		14
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[7],[9]	0		0
Liabilities
Derivative liabilities	[7],[9]	0		0
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Corporate equities		0		0
Investments, including money market funds (2)	[8]	0		0
Hedged portion of natural gas inventory		0		0
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[9]	173		161
Liabilities
Derivative liabilities	[9]	191		96
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Corporate equities		0		0
Investments, including money market funds (2)	[8]	0		0
Hedged portion of natural gas inventory		0		0
CERC Corp [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Natural gas [Member]
Assets
Natural gas derivatives (3)(4)	[9]	47		57
Liabilities
Derivative liabilities	[9]	$ 17		$ 11

[1] Amounts represent the impact of legally enforceable master netting arrangements that allow CenterPoint Energy and CERC to settle positive and negative positions and also include cash collateral of $19 million as of both December 31, 2018 and 2017, respectively, posted with the same counterparties.

[2] CenterPoint Energy and CERC did not have significant Level 3 sales during any of the years ended December 31, 2018, 2017 or 2016.

[3] Mark-to-market value of Level 3 derivative assets acquired through the purchase of AEM were less than $1 million at the acquisition date.

[4] During 2016, CenterPoint Energy transferred its indexed debt securities from Level 2 to Level 3 to reflect changes in the significance of the unobservable inputs used in the valuation.

[5] During 2018, CenterPoint Energy transferred its indexed debt securities derivative from Level 3 to Level 2 to reflect changes in the significance of the unobservable inputs used in the valuation.

[6] Includes Securitization Bond debt.

[7] Level 1 natural gas derivatives include exchange-traded derivatives cleared by the CME, which deems that financial instruments cleared by the CME are settled daily in connection with posted cash payments. As a result of this exchange rule, CME-related derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are presented in Level 1 net of posted cash; however, the derivatives remain outstanding and subject to future commodity price fluctuations until they are settled in accordance with their contractual terms. Derivative transactions cleared on exchanges other than the CME (e.g., the Intercontinental Exchange or ICE) continue to be reported on a gross basis.

[8] Amounts are included in Prepaid and Other Current Assets and Other Assets in the Consolidated Balance Sheets.

[9] Natural gas derivatives include no material amounts related to physical forward transactions with Enable.

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Unconsolidated Affiliate (CenterPoint Energy and CERC) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended	12 Months Ended
		Dec. 31, 2018		Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016		Sep. 04, 2018
Enable Units [Abstract]
Preferred units - unconsolidated affiliate		$ 363			$ 363	$ 363
Percentage of sales that trigger right of first refusal					5.00%
Enable Distributions [Abstract]
Total distributions received from Enable					$ 333	333		$ 319
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
CenterPoint Energy’s equity in earnings, net					307	265		208
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]
CenterPoint Energy’s equity method investment in Enable		2,482			2,482	2,472
CERC Corp [Member]
Investment in unconsolidated affiliates - discontinued operations		0			0	2,472
Deferred income taxes, net - discontinued operations		$ 0			0	927
Contribution from parent					960	38		72
Enable Distributions [Abstract]
Total distributions received from Enable					223	297		297
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Income tax expense					46	104		81
Income (loss) from discontinued operations, net of tax					$ 138	$ 161		127
Enable Midstream Partners [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Basis difference amortization period					30 years
OGE [Member]
Enable Units [Abstract]
Percentage of sales that trigger right of first refusal					5.00%
Enable Midstream Partners [Member]
Enable Partnership Interest [Abstract]
Limited partner ownership interest	[1],[2]	54.00%			54.00%	54.10%
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Operating revenues					$ 3,431	$ 2,803		2,272
Cost of sales, excluding depreciation and amortization					1,819	1,381		1,017
Depreciation and amortization					398	366		338
Operating income					648	528		385
Net income attributable to Enable common units					485	400		290
CenterPoint Energy’s interest					262	216		160
Basis difference amortization (1)	[3]				47	49		48
Loss on dilution, net of proportional basis difference recognition					(2)	0		0
CenterPoint Energy’s equity in earnings, net	[4]				307	265		$ 208
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets		$ 449			449	416
Non-current assets		11,995			11,995	11,177
Current liabilities		1,615			1,615	1,279
Non-current liabilities		3,211			3,211	2,660
Non-controlling interest		38			38	12
Preferred equity		362			362	362
Enable partners’ equity		7,218			7,218	7,280
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]
CenterPoint Energy’s ownership interest in Enable partners’ equity		3,896			3,896	3,935
CenterPoint Energy’s basis difference		(1,414)			(1,414)	(1,463)
CenterPoint Energy’s equity method investment in Enable		$ 2,482			$ 2,482	$ 2,472
Enable Midstream Partners [Member] | Common Units [Member]
Enable Distributions [Abstract]
Distribution per share of common units	[5]	$ 0.3180		$ 0.9540		$ 1.2720		$ 1.2720
Distributions received from equity method investment		$ 74	[5]	$ 223		$ 297		$ 297
Enable Midstream Partners [Member] | Series A Preferred Units [Member]
Enable Distributions [Abstract]
Distribution per share of Series A preferred units	[6]				$ 2.5000	$ 2.5000		$ 1.5417
Distributions received from Enable cost method investment	[6]				$ 36	$ 36		$ 22
Enable Midstream Partners [Member] | CERC Corp [Member]
Enable Partnership Interest [Abstract]
Limited partner ownership interest	[1],[2]					54.10%
Enable Midstream Partners [Member] | CERC Corp [Member] | Common Units [Member]
Enable Distributions [Abstract]
Distribution per share of common units				$ 0.9540		$ 1.2720		$ 1.2720
Distributions received from equity method investment	[5]				$ 223	$ 297		$ 297
Common Units [Member] | Enable Midstream Partners [Member]
Enable Units [Abstract]
Limited partner interest units held	[2]	233,856,623			233,856,623	233,856,623
Common Units [Member] | Enable Midstream Partners [Member] | CERC Corp [Member]
Enable Units [Abstract]
Limited partner interest units held	[2]					233,856,623
Series A Preferred Units [Member] | Enable Midstream Partners [Member]
Enable Units [Abstract]
Preferred units held	[2],[7]	14,520,000			14,520,000	14,520,000
Enable Internal Spin [Member] | CERC Corp [Member]
Contribution from parent					$ 600
Natural Gas Expenses [Member] | Enable Midstream Partners [Member]
Transaction with Enable [Abstract]
Natural gas expenses, including transportation and storage costs					122	$ 115		110
Accounts payable for natural gas purchases from Enable		$ 11			11	13
Natural Gas Expenses [Member] | Enable Midstream Partners [Member] | CERC Corp [Member]
Transaction with Enable [Abstract]
Natural gas expenses, including transportation and storage costs						115		110
Accounts payable for natural gas purchases from Enable						13
Transitional Service [Member] | Enable Midstream Partners [Member]
Transaction with Enable [Abstract]
Reimbursement of transition services (1)	[4]				4	4		7
Accounts receivable for amounts billed for transition services		$ 2			$ 2	$ 1
Enable Midstream Partners [Member]
Enable Units [Abstract]
Maximum incentive distribution right					50.00%
Enable Midstream Partners [Member] | OGE [Member]
Enable Partnership Interest [Abstract]
Limited partner ownership interest	[1]				25.60%	25.70%
Enable Midstream Partners [Member] | Public unitholders [Member]
Enable Partnership Interest [Abstract]
Limited partner ownership interest	[1]				20.40%	20.20%
Enable Midstream Partners [Member] | Minimum [Member]
Enable Units [Abstract]
Incentive distribution per unit					$ 0.2875
Enable Midstream Partners [Member] | Maximum [Member]
Enable Units [Abstract]
Incentive distribution per unit					$ 0.330625
Enable Midstream Partners [Member] | Common Units [Member] | OGE [Member]
Enable Units [Abstract]
Limited partner interest units held		110,982,805			110,982,805	110,982,805
Enable Midstream Partners [Member] | Common Units [Member] | Public unitholders [Member]
Enable Units [Abstract]
Limited partner interest units held		88,392,983			88,392,983	87,744,652
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member] | Enable Midstream Partners [Member] | CERC Corp [Member]
Investment in unconsolidated affiliates - discontinued operations						$ 2,472	[8]	2,505	[8]	$ 2,400
Deferred income taxes, net - discontinued operations										$ 974
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Equity in earnings of unconsolidated affiliate, net					$ 184	265		208
Income tax expense					46	104		81
Income (loss) from discontinued operations, net of tax					$ 138	$ 161		$ 127
Enable GP, LLC [Member]
Enable Units [Abstract]
Management rights ownership percentage					50.00%
Incentive distribution right					40.00%
Enable GP, LLC [Member] | CERC Corp [Member]
Enable Units [Abstract]
Management rights ownership percentage	[9],[10]					50.00%
Incentive distribution right	[10],[11]					40.00%
Enable GP, LLC [Member] | CenterPoint Energy [Member]
Enable Units [Abstract]
Management rights ownership percentage	[9],[10]				50.00%	50.00%
Incentive distribution right	[10],[11]				40.00%	40.00%
Enable GP, LLC [Member] | OGE [Member]
Enable Units [Abstract]
Management rights ownership percentage	[9]				50.00%	50.00%
Incentive distribution right	[11]				60.00%	60.00%

[1] Excludes the Enable Series A Preferred Units owned by CenterPoint Energy.

[2] Prior to the Internal Spin on September 4, 2018 described above, CenterPoint Energy’s investment in Enable’s common units, excluding the Enable Series A Preferred Units held directly by CenterPoint Energy, was held indirectly through CERC.

[3] Equity in earnings of unconsolidated affiliate includes CenterPoint Energy’s share of Enable earnings adjusted for the amortization of the basis difference of CenterPoint Energy’s original investment in Enable and its underlying equity in net assets of Enable. The basis difference is being amortized over approximately 30 years, the remaining average life of the assets to which the basis difference is attributed.

[4] Represents amounts billed under the Transition Agreements for certain support services provided to Enable. Actual transition services costs are recorded net of reimbursement.

[5] Reflects CERC’s ownership of Enable common units up to September 4, 2018 when CERC completed the Internal Spin. After such date, distributions from Enable were received directly by CenterPoint Energy.

[6] 2016 amounts represent the period from February 18, 2016 to December 31, 2016.

[7] The carrying amount of the Enable Series A Preferred Units, reflected as Preferred units - unconsolidated affiliate on CenterPoint Energy’s Consolidated Balance Sheets, was $363 million as of both December 31, 2018 and 2017. No impairment charges or adjustment to carrying value were made as no observable price changes were identified in the current or prior reporting periods. See Note 2(r) for further discussion.

[8] On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

[9] As of December 31, 2018, Enable is controlled jointly by CenterPoint Energy and OGE. Sale of CenterPoint Energy’s or OGE’s ownership interests in Enable GP to a third party is subject to mutual rights of first offer and first refusal, and CenterPoint Energy is not permitted to dispose of less than all of its interest in Enable GP.

[10] CenterPoint Energy held the management rights and incentive distributions rights in Enable GP indirectly through CERC until the Internal Spin on September 4, 2018 described above.

[11] Enable is expected to pay a minimum quarterly distribution of $0.2875 per common unit on its outstanding common units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to Enable GP and its affiliates, within 60 days after the end of each quarter. If cash distributions to Enable’s unitholders exceed $0.330625 per common unit in any quarter, Enable GP will receive increasing percentages or incentive distributions rights, up to 50%, of the cash Enable distributes in excess of that amount. In certain circumstances Enable GP will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election. To date, no incentive distributions have been made.

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Indexed Debt Securities (ZENS) and Securities Related to ZENS (CenterPoint Energy) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Jun. 14, 2018 $ / shares shares	Jan. 31, 2018 $ / shares	Nov. 26, 2017 $ / shares
ZENS-Related Securities
ZENS-Related Securities	$ 960,000,000
Proceeds from sale and maturity of marketable securities	(398,000,000)	$ 0	$ (178,000,000)
Gain (loss) on ZENS-Related Securities	(22,000,000)	7,000,000	326,000,000
ZENS-Related Securities	540,000,000	960,000,000
Debt component of ZENS
Debt Component of ZENS	122,000,000
Distribution to ZENS holders	398,000,000	0	178,000,000
Debt Component of ZENS	24,000,000	122,000,000
Derivative component of ZENS
Derivative Component of ZENS	668,000,000
Distribution to ZENS holders	398,000,000	0	178,000,000
Loss (gain) on indexed debt securities	232,000,000	(49,000,000)	413,000,000
Derivative Component of ZENS	$ 601,000,000	$ 668,000,000
AT&T Common [Member]
Indexed Debt Securities [Line Items]
Balance of investment owned (in shares) | shares	10,212,945
Charter Common [Member]
Indexed Debt Securities [Line Items]
Balance of investment owned (in shares) | shares	872,912	872,503
Time Common [Member]
Indexed Debt Securities [Line Items]
Balance of investment owned (in shares) | shares		888,392
ZENS early exchange ratio					100.00%
TW Common [Member]
Indexed Debt Securities [Line Items]
Balance of investment owned (in shares) | shares		7,107,130
ZENS-Related Securities [Member]
ZENS-Related Securities
ZENS-Related Securities	$ 960,000,000	$ 953,000,000	805,000,000
Proceeds from sale and maturity of marketable securities	(398,000,000)		(178,000,000)
Gain (loss) on ZENS-Related Securities	(22,000,000)	7,000,000	326,000,000
ZENS-Related Securities	540,000,000	960,000,000	953,000,000
Debt Component Of ZENS [Member]
Debt component of ZENS
Debt Component of ZENS	122,000,000	114,000,000	145,000,000
Accretion of debt component of ZENS	21,000,000	27,000,000	26,000,000
2 % interest paid	(17,000,000)	(17,000,000)	(17,000,000)
Distribution to ZENS holders	102,000,000	2,000,000	40,000,000
Debt Component of ZENS	24,000,000	122,000,000	114,000,000
Derivative component of ZENS
Distribution to ZENS holders	102,000,000	2,000,000	40,000,000
Derivative Component Of ZENS [Member]
Debt component of ZENS
Distribution to ZENS holders	46,000,000	0	21,000,000
Derivative component of ZENS
Derivative Component of ZENS	668,000,000	717,000,000	442,000,000
Distribution to ZENS holders	46,000,000	0	21,000,000
Loss (gain) on indexed debt securities	(21,000,000)	(49,000,000)	296,000,000
Derivative Component of ZENS	601,000,000	$ 668,000,000	$ 717,000,000
Subordinated Debt ZENS Member
Indexed Debt Securities [Line Items]
Principal amount of debt issued	1,000,000,000
Outstanding debt balance	$ 828,000,000
Subordinated note cash exchangeable percentage of fair value	95.00%
ZENS annual interest rate	2.00%
Target annual yield on referenced shares before increase or decrease of principal amount of subordinated note	2.309%
Contingent principal amount of indexed debt securities issued by CenterPoint Energy in September 1999 and outstanding and exchangeable	$ 93,000,000
The cash exchange amount from referenced shares per $1,000 face amount of individual notes	620
Face amount of each indexed debt security notes issued by CenterPoint Energy in September 1999	$ 1,000
Subordinated Debt ZENS Member | AT&T Common [Member]
Indexed Debt Securities [Line Items]
Number of shares referenced in exchangeable subordinated note | shares	0.7185
Subordinated Debt ZENS Member | Charter Common [Member]
Indexed Debt Securities [Line Items]
Number of shares referenced in exchangeable subordinated note | shares	0.061382	0.061382
Subordinated Debt ZENS Member | Time Common [Member]
Indexed Debt Securities [Line Items]
Number of shares referenced in exchangeable subordinated note | shares		0.0625
Subordinated Debt ZENS Member | TW Common [Member]
Indexed Debt Securities [Line Items]
Number of shares referenced in exchangeable subordinated note | shares		0.5
AT&T To Acquire Time Warner [Member]
Indexed Debt Securities [Line Items]
Indexed debt – reduction	$ (95,000,000)
Indexed debt securities derivative – reduction	(45,000,000)
Loss on indexed debt securities	242,000,000
Debt component of ZENS
Distribution to ZENS holders	382,000,000
Derivative component of ZENS
Distribution to ZENS holders	382,000,000
AT&T To Acquire Time Warner [Member] | AT&T Common [Member]
Indexed Debt Securities [Line Items]
Cash paid per share exchanged | $ / shares				$ 53.75
Fractional shares exchanged for each TW Common share held | shares				1.437
Cash proceeds received for shares exchanged	382,000,000
Total AT&T shares received in exchange for TW Common shares held | shares				10,212,945
Meredith to acquire time [Member]
Indexed Debt Securities [Line Items]
Indexed debt – reduction	(4,000,000)
Indexed debt securities derivative – reduction	(1,000,000)
Loss on indexed debt securities	11,000,000
Debt component of ZENS
Distribution to ZENS holders	16,000,000
Derivative component of ZENS
Distribution to ZENS holders	16,000,000
Meredith to acquire time [Member] | Time Common [Member]
Indexed Debt Securities [Line Items]
Cash paid per share exchanged | $ / shares					$ 18.50	$ 18.50
Cash proceeds received for shares exchanged	$ 16,000,000

XML

Equity (CenterPoint Energy) (Details)																	12 Months Ended
		Dec. 12, 2018 USD ($) $ / shares	Oct. 23, 2018 USD ($) $ / shares	Oct. 01, 2018 USD ($) $ / shares shares	Aug. 22, 2018 USD ($) $ / shares shares	Jul. 26, 2018 USD ($) $ / shares	Apr. 26, 2018 USD ($) $ / shares	Dec. 13, 2017 USD ($) $ / shares	Oct. 25, 2017 USD ($) $ / shares	Jul. 27, 2017 USD ($) $ / shares	Apr. 27, 2017 USD ($) $ / shares	Jan. 05, 2017 USD ($) $ / shares	Oct. 27, 2016 USD ($) $ / shares	Jul. 28, 2016 USD ($) $ / shares	Apr. 28, 2016 USD ($) $ / shares	Jan. 20, 2016 USD ($) $ / shares	Dec. 31, 2018 USD ($) day $ / shares shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares
Dividends declared per share | $ / shares																	$ 1.12	$ 1.3475	$ 1.03
Preferred stock dividend requirement																	$ 35,000,000	$ 0	$ 0
Preferred stock par value (in dollars per share) | $ / shares																	$ 0.01	$ 0.01	$ 0.01
Proceeds from the issuance of Series A Preferred Stock, net					$ 790,000,000												$ 1,740,000,000	$ 0	$ 0
Proceeds from issuance of common stock																	1,844,000,000	0	0
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance																	(68,000,000)	(71,000,000)
Prior service cost (2)	[1]																1,000,000	1,000,000
Actuarial losses (2)	[1]																6,000,000	7,000,000
Tax benefit (expense)																	6,000,000	(4,000,000)
Net current period other comprehensive income (loss)																	(25,000,000)	3,000,000	(5,000,000)
Ending Balance																	(108,000,000)	(68,000,000)	$ (71,000,000)
Enable Midstream Partners [Member]
Undistributed earnings from equity method investments included in retained earnings																	$ 31,000,000	$ 0
Common Stock [Member]
Declaration Date		Dec. 12, 2018	Oct. 23, 2018			Jul. 26, 2018	Apr. 26, 2018	Dec. 13, 2017	Oct. 25, 2017	Jul. 27, 2017	Apr. 27, 2017	Jan. 05, 2017	Oct. 27, 2016	Jul. 28, 2016	Apr. 28, 2016	Jan. 20, 2016
Record Date		Feb. 21, 2019	Nov. 15, 2018			Aug. 16, 2018	May 17, 2018	Feb. 15, 2018	Nov. 16, 2017	Aug. 16, 2017	May 16, 2017	Feb. 16, 2017	Nov. 16, 2016	Aug. 16, 2016	May 16, 2016	Feb. 16, 2016
Payment Date		Mar. 14, 2019	Dec. 13, 2018			Sep. 13, 2018	Jun. 14, 2018	Mar. 08, 2018	Dec. 08, 2017	Sep. 08, 2017	Jun. 09, 2017	Mar. 10, 2017	Dec. 09, 2016	Sep. 09, 2016	Jun. 10, 2016	Mar. 10, 2016
Dividends declared per share | $ / shares		$ 0.2875	$ 0.2775			$ 0.2775	$ 0.2775	$ 0.2775	$ 0.2675	$ 0.2675	$ 0.2675	$ 0.2675	$ 0.2575	$ 0.2575	$ 0.2575	$ 0.2575	$ 1.1200	$ 1.3475	$ 1.0300
Dividends declared		$ 144,000,000	$ 139,000,000			$ 120,000,000	$ 120,000,000	$ 120,000,000	$ 116,000,000	$ 115,000,000	$ 115,000,000	$ 115,000,000	$ 111,000,000	$ 111,000,000	$ 111,000,000	$ 110,000,000	$ 523,000,000	$ 581,000,000	$ 443,000,000
Stock issued (in shares) | shares				69,633,027
Common stock issued per share price | $ / shares				$ 27.25
Proceeds from issuance of common stock				$ 1,844,000,000
Series A Preferred Stock [Member]
Declaration Date		Dec. 12, 2018
Record Date		Feb. 15, 2019
Payment Date		Mar. 01, 2019
Dividends declared per share | $ / shares		$ 32.1563															$ 32.1563	$ 0.0000	$ 0.0000
Dividends declared		$ 26,000,000															$ 26,000,000
Preferred stock dividend requirement																	$ 18,000,000	$ 0	$ 0
Stock issued (in shares) | shares					800,000
Preferred stock par value (in dollars per share) | $ / shares					$ 1,000												$ 0.01	$ 0.00
Preferred stock liquidation preference																	$ 800,000,000	$ 0
Preferred stock liquidation preference (per share) | $ / shares																	$ 1,000
Preferred stock dividend rate																	6.125%
Preferred stock redemption price (per share) | $ / shares																	$ 1,000
Preferred stock convertible threshold (in days) | day																	120
Series B Preferred Stock [Member]
Declaration Date		Dec. 12, 2018	Oct. 23, 2018
Record Date		Feb. 15, 2019	Nov. 15, 2018
Payment Date		Mar. 01, 2019	Dec. 01, 2018
Dividends declared per share | $ / shares		$ 17.5000	$ 11.6667														$ 29.1667	$ 0.0000	$ 0.0000
Dividends declared		$ 17,000,000	$ 11,000,000														$ 28,000,000
Preferred stock dividend requirement																	$ 17,000,000	$ 0	$ 0
Preferred stock par value (in dollars per share) | $ / shares																	$ 0.01	$ 0.00
Preferred stock liquidation preference																	$ 977,500,000	$ 0
Preferred stock liquidation preference (per share) | $ / shares																	$ 1,000
Preferred stock dividend rate																	7.00%
Proceeds from the issuance of Series B Preferred Stock, net				$ 950,000,000
Depositary Share, Conversion Ratio																	0.05
Preferred Stock, Convertible, Conversion Price | $ / shares																	$ 1,000
Preferred stock threshold consecutive calendar days | day																	20
Depositary Share [Member]
Stock issued (in shares) | shares				19,550,000
Depositary share par value (in dollars per depositary share) | $ / shares				$ 50													$ 50
Number of depositary shares eligible for conversion (in shares) | shares																	20
120 Days After Conclusion of Review or Appeal [Member] | Series A Preferred Stock [Member]
Preferred stock redemption price (per share) | $ / shares																	$ 1,020
Preferred stock redemption percentage liquidation value																	102.00%
London Interbank Offered Rate (LIBOR) [Member] | Series A Preferred Stock [Member]
Preferred stock dividend rate																	3.27%
Over-Allotment Option [Member] | Common Stock [Member]
Stock issued (in shares) | shares				9,082,568
Over-Allotment Option [Member] | Series B [Member]
Stock issued (in shares) | shares				2,550,000
Minimum [Member] | Series B Preferred Stock [Member]
Preferred Stock, Convertible, Stock Price Trigger | $ / shares																	$ 27.2494
Conversion rate per share | shares																	30.5820
Minimum [Member] | Series B [Member]
Preferred Stock, Convertible, Stock Price Trigger | $ / shares																	$ 27.2494
Minimum [Member] | Depositary Share [Member]
Conversion rate per share | shares																	1.5291
Maximum [Member] | Series B Preferred Stock [Member]
Preferred Stock, Convertible, Stock Price Trigger | $ / shares																	$ 32.6990
Conversion rate per share | shares																	36.6980
Maximum [Member] | Series B [Member]
Preferred Stock, Convertible, Stock Price Trigger | $ / shares																	$ 32.6990
Maximum [Member] | Depositary Share [Member]
Conversion rate per share | shares																	1.8349
Interest Rate Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:	[2]																$ (19,000,000)	(5,000,000)
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Gain (loss) reclassified from accumulated OCI into income																	1,000,000	1,000,000
Houston Electric [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance																	0	1,000,000
Prior service cost (2)	[1]																0	0
Actuarial losses (2)	[1]																0	0
Tax benefit (expense)																	4,000,000	0
Net current period other comprehensive income (loss)																	(14,000,000)	(1,000,000)	1,000,000
Ending Balance																	(14,000,000)	0	1,000,000
Houston Electric [Member] | Interest Rate Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:	[2]																(18,000,000)	(1,000,000)
Houston Electric [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Gain (loss) reclassified from accumulated OCI into income																	1,000,000	1,000,000
CERC Corp [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance																	6,000,000	3,000,000
Prior service cost (2)	[1]																1,000,000	1,000,000
Actuarial losses (2)	[1]																0	0
Tax benefit (expense)																	(1,000,000)	(3,000,000)
Net current period other comprehensive income (loss)																	0	3,000,000	(6,000,000)
Ending Balance																	5,000,000	6,000,000	$ 3,000,000
CERC Corp [Member] | Interest Rate Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:	[2]																(1,000,000)	(2,000,000)
CERC Corp [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Gain (loss) reclassified from accumulated OCI into income																	1,000,000	1,000,000
Pension and Other Postretirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:																	(19,000,000)	4,000,000
Pension and Other Postretirement Plans [Member] | Houston Electric [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:																	0	0
Pension and Other Postretirement Plans [Member] | CERC Corp [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications:																	1,000,000	7,000,000
Adoption of ASU 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Adoption of ASU 2018-02																	(15,000,000)	0
Adoption of ASU 2018-02 [Member] | Houston Electric [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Adoption of ASU 2018-02																	0	0
Adoption of ASU 2018-02 [Member] | CERC Corp [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Adoption of ASU 2018-02																	$ (1,000,000)	$ 0

[1] Amounts are included in the computation of net periodic cost and are reflected in Other, net in each of the Registrants’ respective Statements of Consolidated Income.

[2] Gains and losses are reclassified from Accumulated other comprehensive income into income when the hedged transactions affect earnings. The reclassification amounts are included in Interest and other finance charges in each of the Registrant’s respective Statements of Consolidated Income. Amounts are less than $1 million for each of the years ended December 31, 2018 and 2017, respectively.

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Short Term Borrowings and Long Term Debt Schedule of Debt (Details) - USD ($) $ in Millions		Dec. 31, 2018	Nov. 01, 2018	Dec. 31, 2017
Short term borrowings:
Total short-term borrowings		$ 0		$ 39
Long-term debt:
Long-term Debt, Excluding Current Maturities		8,682		8,195
Long-term Debt		8,682		8,195
Debt, Current	[1]	$ 482		645
ZENS due 2029 (5)
Long-term debt:
Debt instrument interest rate		2.00%
Parent Company [Member]
Long-term debt:
Unamortized Issuance Costs		$ (13)		(4)
Unamortized Discount (Premium), Net		(2)		0
Long-term Debt, Excluding Current Maturities		8,682		8,195
Long-term Debt, Current Maturities	[1]	482		606
Parent Company [Member] | Commercial paper (4)
Long-term debt:
Long-Term	[2]	0		855
Current	[1],[2]	0		0
Parent Company [Member] | ZENS due 2029 (5)
Long-term debt:
Long-Term	[3]	0		0
Current	[1],[3]	24		122
Parent Company [Member] | Senior notes 2.50% to 4.25% due 2021 to 2028
Long-term debt:
Long-Term		2,000		500
Current	[1]	$ 0		0
Parent Company [Member] | Senior notes 2.50% to 4.25% due 2021 to 2028 | Minimum [Member]
Long-term debt:
Debt instrument interest rate		2.50%
Parent Company [Member] | Senior notes 2.50% to 4.25% due 2021 to 2028 | Maximum [Member]
Long-term debt:
Debt instrument interest rate		4.25%
Parent Company [Member] | Pollution control bonds 5.125% due 2028 (6)
Long-term debt:
Long-Term	[4]	$ 68		68
Current	[1],[4]	$ 0		50
Debt instrument interest rate		5.125%	5.05%
Amount of debt secured by general mortgage bonds		$ 68		118
Houston Electric [Member]
Long-term debt:
Unamortized Issuance Costs		(24)		(22)
Unamortized Discount (Premium), Net		(11)		(10)
Long-term Debt, Excluding Current Maturities		4,258		4,319
Long-term Debt		4,258		4,319
Debt, Current	[1]	458		434
Houston Electric [Member] | First mortgage bonds 9.15% due 2021
Long-term debt:
Long-Term		102		102
Current	[1]	$ 0		0
Debt instrument interest rate		9.15%
Amount of debt secured by general mortgage bonds		$ 102
Houston Electric [Member] | General mortgage bonds 1.85% to 6.95% due 2021 to 2048
Long-term debt:
Long-Term		3,212		2,812
Current	[1]	0		0
Amount of debt secured by general mortgage bonds		$ 3,300
Houston Electric [Member] | General mortgage bonds 1.85% to 6.95% due 2021 to 2048 | Minimum [Member]
Long-term debt:
Debt instrument interest rate		1.85%
Houston Electric [Member] | General mortgage bonds 1.85% to 6.95% due 2021 to 2048 | Maximum [Member]
Long-term debt:
Debt instrument interest rate		6.95%
Houston Electric [Member] | System restoration bonds 4.243% due 2022
Long-term debt:
Long-Term		$ 197		256
Current	[1]	$ 59		56
Debt instrument interest rate		4.243%
Houston Electric [Member] | Transition bonds 5.302% due 2019
Long-term debt:
Long-Term		$ 0		208
Current	[1]	$ 208		194
Debt instrument interest rate		5.302%
Houston Electric [Member] | Transition bonds 5.234% due 2020
Long-term debt:
Long-Term		$ 29		85
Current	[1]	$ 56		53
Debt instrument interest rate		5.234%
Houston Electric [Member] | Transition bonds 2.161% to 3.028% due 2020 to 2024
Long-term debt:
Long-Term		$ 753		888
Current	[1]	$ 135		131
Houston Electric [Member] | Transition bonds 2.161% to 3.028% due 2020 to 2024 | Minimum [Member]
Long-term debt:
Debt instrument interest rate		2.161%
Houston Electric [Member] | Transition bonds 2.161% to 3.028% due 2020 to 2024 | Maximum [Member]
Long-term debt:
Debt instrument interest rate		3.028%
CERC Corp [Member]
Short term borrowings:
Total short-term borrowings	[1],[5]	$ 0		39
Long-term debt:
Unamortized Issuance Costs	[5]	(15)		(12)
Unamortized Discount (Premium), Net	[5]	(17)		(22)
Long-term Debt, Excluding Current Maturities	[5]	2,371		2,457
Long-term Debt, Current Maturities	[1],[5]	0		0
Long-term Debt	[5]	2,371		2,457
Debt, Current	[1],[5]	0		39
CERC Corp [Member] | Senior notes 3.55% to 6.625% due 2021 to 2047
Long-term debt:
Long-Term	[5]	2,193		1,593
Current	[1],[5]	$ 0		0
CERC Corp [Member] | Senior notes 3.55% to 6.625% due 2021 to 2047 | Minimum [Member]
Long-term debt:
Debt instrument interest rate		3.55%
CERC Corp [Member] | Senior notes 3.55% to 6.625% due 2021 to 2047 | Maximum [Member]
Long-term debt:
Debt instrument interest rate		6.625%
CERC Corp [Member] | Commercial paper (4)
Long-term debt:
Long-Term	[2],[5]	$ 210		898
Current	[1],[2],[5]	0		0
CERC Corp [Member] | Product Financing Arrangement [Member]
Short term borrowings:
Total short-term borrowings	[1],[5],[6]	$ 0		$ 39

[1] Includes amounts due or exchangeable within one year of the date noted.

[2] Classified as long-term debt because the termination date of the facility that backstops the commercial paper is more than one year from the date noted.

[3] CenterPoint Energy’s ZENS obligation is bifurcated into a debt component and an embedded derivative component. For additional information regarding ZENS, see Note 12(b). As ZENS are exchangeable for cash at any time at the option of the holders, these notes are classified as a current portion of long-term debt.

[4] $68 million and $118 million of these series of debt were secured by general mortgage bonds of Houston Electric as of December 31, 2018 and 2017, respectively.

[5] Issued by CERC Corp.

[6] CenterPoint Energy’s and CERC’s NGD has AMAs associated with its utility distribution service in Arkansas, Louisiana, Mississippi, Oklahoma and Texas. In March 2018, NGD’s third-party AMAs in Arkansas, Louisiana and Oklahoma expired, and NGD entered into new AMAs with CES effective April 1, 2018 in these states. The AMAs have varying terms, the longest of which expires in 2021. Pursuant to the provisions of the agreements, NGD sells natural gas and agrees to repurchase an equivalent amount of natural gas during the winter heating seasons at the same cost.

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Short Term Borrowings and Long Term Debt Long-term Debt (Details)							1 Months Ended	12 Months Ended
		Jan. 15, 2019 USD ($)	Nov. 01, 2018 USD ($)	Oct. 05, 2018 USD ($)	Mar. 26, 2018 USD ($)	Feb. 28, 2018 USD ($)	Jan. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)
Line of Credit Facility [Abstract]
Size of credit facility								$ 4,500,000,000		$ 2,900,000,000
Senior Notes Due 2021 [Member]
Long-term debt:
Debt instrument interest rate	[1]			3.60%
Maturity date of debt issued	[1]			Nov. 01, 2021
Principal amount of debt issued	[1]			$ 500,000,000
Senior Notes Due 2024 [Member]
Long-term debt:
Debt instrument interest rate	[1]			3.85%
Maturity date of debt issued	[1]			Feb. 01, 2024
Principal amount of debt issued	[1]			$ 500,000,000
Senior Notes Due 2028 [Member]
Long-term debt:
Debt instrument interest rate	[1]			4.25%
Maturity date of debt issued	[1]			Nov. 01, 2028
Principal amount of debt issued	[1]			$ 500,000,000
Securitization Bonds [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
2018								458,000,000
2019								231,000,000
2020								211,000,000
2021								219,000,000
2022								156,000,000
Long term Debt Excluding ZENS [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
2018	[2]							458,000,000
2019	[2]							231,000,000
2020	[2]							1,706,000,000
2021	[2]							1,230,000,000
2022	[2]							656,000,000
Houston Electric [Member]
Line of Credit Facility [Abstract]
Size of credit facility								300,000,000		300,000,000
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
2018	[2]							458,000,000
2019	[2]							231,000,000
2020	[2]							613,000,000
2021	[2]							519,000,000
2022	[2]							356,000,000
Additional first mortgage bonds and general mortgage bonds that could be issued								$ 4,300,000,000
Percentage of property additions								70.00%
Houston Electric [Member] | General Mortgage Bonds Due 2048 [Member]
Long-term debt:
Debt instrument interest rate	[3]					3.95%
Maturity date of debt issued	[3]					Mar. 01, 2048
Principal amount of debt issued	[3]					$ 400,000,000
Houston Electric [Member] | First mortgage bonds 9.15% due 2021
Long-term debt:
Debt instrument interest rate								9.15%
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Secured debt amount with asset liens								$ 102,000,000
Replacement fund requirements to be satisfied in 2018								283,000,000
Sinking fund requirements to be satisfied in 2018								1,600,000
Long-Term								102,000,000		102,000,000
Houston Electric [Member] | General mortgage bonds 1.85% to 6.95% due 2021 to 2048
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Secured debt amount with asset liens								3,300,000,000
Long-Term								3,212,000,000		2,812,000,000
CERC Corp [Member]
Line of Credit Facility [Abstract]
Size of credit facility								900,000,000	[4]	900,000,000	[5]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
2018								0
2019								0
2020								593,000,000
2021								210,000,000
2022								300,000,000
CERC Corp [Member] | Senior Notes Due 2023 [Member]
Long-term debt:
Debt instrument interest rate	[3],[6]				3.55%
Maturity date of debt issued	[3],[6]				Apr. 01, 2023
Principal amount of debt issued	[3],[6]				$ 300,000,000
CERC Corp [Member] | Senior Notes Due 2028 [Member]
Long-term debt:
Debt instrument interest rate	[3],[6]				4.00%
Maturity date of debt issued	[3],[6]				Apr. 01, 2028
Principal amount of debt issued	[3],[6]				$ 300,000,000
CERC Corp [Member] | Commercial paper (4)
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-Term	[7],[8]							210,000,000		898,000,000
Revolving Credit Facility [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								0		0
Revolving Credit Facility [Member] | Houston Electric [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								0		0
Revolving Credit Facility [Member] | CERC Corp [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit	[5]							$ 0		0
Line of Credit [Member] | Houston Electric [Member]
Line of Credit Facility [Abstract]
Percentage on limitation of debt to total capitalization under covenant (in hundredths)	[9]							65.00%
Ratio of indebtedness to net capital	[10]							0.492
Line of Credit [Member] | CERC Corp [Member]
Line of Credit Facility [Abstract]
Percentage on limitation of debt to total capitalization under covenant (in hundredths)	[4],[9]							65.00%
Ratio of indebtedness to net capital	[4],[10]							0.468
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Houston Electric [Member]
Line of Credit Facility [Abstract]
Basis spread on LIBOR	[11]							1.125%
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | CERC Corp [Member]
Line of Credit Facility [Abstract]
Basis spread on LIBOR	[4],[11]							1.125%
Letter of Credit [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								$ 11,000,000		11,000,000
Letter of Credit [Member] | Houston Electric [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								4,000,000		4,000,000
Letter of Credit [Member] | CERC Corp [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit	[5]							1,000,000		1,000,000
Commercial paper (4)
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								210,000,000		1,753,000,000
Commercial paper (4) | Houston Electric [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								0		0
Commercial paper (4) | CERC Corp [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit	[5]							$ 210,000,000		$ 898,000,000
Debt, Weighted Average Interest Rate	[5]							2.93%		1.72%
Subsequent Event [Member] | Houston Electric [Member] | General Mortgage Bonds Due 2049 [Member]
Long-term debt:
Debt instrument interest rate	[3]	4.25%
Maturity date of debt issued	[3]	Feb. 01, 2049
Principal amount of debt issued	[3]	$ 700,000,000
Subsequent Event [Member] | Vectren [Member]
Line of Credit Facility [Abstract]
Long-term line of credit							90
Subsequent Event [Member] | Vectren [Member] | Commercial paper (4)
Line of Credit Facility [Abstract]
Weighted average interest rate of commercial paper issued in connection with the Merger	[12],[13]						2.88%
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit	[12],[13]						$ 1,660,000,000
Parent Company [Member]
Line of Credit Facility [Abstract]
Size of credit facility								$ 3,300,000,000	[14]	$ 1,700,000,000
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Temporary increased line of credit facility, maximum borrowing capacity								3,300,000,000
Parent Company [Member] | Commercial paper (4)
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-Term	[7]							$ 0		855,000,000
Parent Company [Member] | Pollution control bonds 5.125% due 2028 (6)
Long-term debt:
Amount of debt retired	[15]		$ 50,000,000
Debt instrument interest rate			5.05%					5.125%
Maturity date of debt issued			Nov. 01, 2018
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Secured debt amount with asset liens								$ 68,000,000		118,000,000
Long-Term	[16]							68,000,000		68,000,000
Parent Company [Member] | Revolving Credit Facility [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								$ 0		0
Parent Company [Member] | Line of Credit [Member]
Line of Credit Facility [Abstract]
Percentage on limitation of debt to total capitalization under covenant (in hundredths)	[9]							65.00%
Ratio of indebtedness to net capital	[10]							0.449
Percentage on limitation of debt to total capitalization under covenant amended (in hundredths)								70.00%
System restoration costs threshold for increase in permitted debt to EBITDA covenant ratio								$ 100,000,000
Consecutive period for system restoration costs to exceed $100 million (in months)								12
Parent Company [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Abstract]
Basis spread on LIBOR	[11]							1.25%
Parent Company [Member] | Letter of Credit [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								$ 6,000,000		6,000,000
Parent Company [Member] | Commercial paper (4)
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Long-term Line of Credit								$ 0		$ 855,000,000
Debt, Weighted Average Interest Rate								0.00%		1.88%
Parent Company [Member] | Vectren acquisition [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Bridge Loan								$ 5,000,000,000
Parent Company [Member] | Vectren acquisition [Member] | Line of Credit [Member]
Line of Credit Facility [Abstract]
Percentage on limitation of debt to total capitalization under covenant amended (in hundredths)								75.00%
Parent Company [Member] | April 2018 [Member]
Line of Credit Facility [Abstract]
Size of credit facility								$ 1,700,000,000
Parent Company [Member] | April 2018 [Member] | Vectren acquisition [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Temporary increased line of credit facility, maximum borrowing capacity								3,300,000,000
Parent Company [Member] | October 2018 [Member]
Line of Credit Facility [Abstract]
Size of credit facility								1,700,000,000
Parent Company [Member] | October 2018 [Member] | Vectren acquisition [Member]
Annual maturities of long term debt, capital leases, and sinking fund requirements, excluding ZENS obligations [Abstract]
Temporary increased line of credit facility, maximum borrowing capacity								$ 3,300,000,000

[1] Proceeds from these debt issuances were used to fund a portion of the Merger and to pay related fees and expenses.

[2] These maturities include Securitization Bonds principal repayments on scheduled payment dates.

[3] Proceeds from these debt issuances were used for general limited liability company and corporate purposes, as applicable, including capital expenditures, repayment of portions of outstanding commercial paper and borrowings under CenterPoint Energy’s money pool.

[4] Issued by CERC Corp.

[5] Issued by CERC Corp.

[6] Issued by CERC Corp.

[7] Classified as long-term debt because the termination date of the facility that backstops the commercial paper is more than one year from the date noted.

[8] Issued by CERC Corp.

[9] For CenterPoint Energy and Houston Electric, the financial covenant limit will temporarily increase from 65% to 70% if Houston Electric experiences damage from a natural disaster in its service territory and CenterPoint Energy certifies to the administrative agent that Houston Electric has incurred system restoration costs reasonably likely to exceed $100 million in a consecutive 12-month period, all or part of which Houston Electric intends to seek to recover through securitization financing. Such temporary increase in the financial covenant would be in effect from the date CenterPoint Energy delivers its certification until the earliest to occur of (i) the completion of the securitization financing, (ii) the first anniversary of CenterPoint Energy’s certification or (iii) the revocation of such certification.

[10] As defined in the revolving credit facility agreement, excluding Securitization Bonds.

[11] Based on credit ratings as of December 31, 2018.

[12] Proceeds from these commercial paper issuances were used to fund a portion of the Merger and to pay related fees and expenses and were contributed to Vectren for its payment of its stub period cash dividend, long-term incentive payments and to fund the repayment of indebtedness of Vectren subsidiaries redeemed at the option of the holder as a result of the closing of the Merger.

[13] The commercial paper notes were issued at various times in January 2019 with maturities up to and including 90 days as of the time of issuance, and, prior to their use as described in connection with the closing of the Merger, the net proceeds of such issuances were invested in short-term investments.

[14] Pursuant to the amendment entered into in May 2018, the aggregate commitments under the CenterPoint Energy revolving credit facility increased to $3.3 billion on October 5, 2018 as a result of the satisfaction of certain conditions described above.

[15] Secured by general mortgage bonds of Houston Electric.

[16] $68 million and $118 million of these series of debt were secured by general mortgage bonds of Houston Electric as of December 31, 2018 and 2017, respectively.

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Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Current income tax expense (benefit):
Federal	$ 89		$ 32		$ 23
State	9		9		18
Total current expense (benefit)	98		41		41
Deferred income tax expense (benefit):
Federal	(25)		(806)		185
State	73		36		28
Total deferred expense (benefit)	48		(770)		213
Total income tax expense (benefit)	146	[1]	(729)	[2]	254	[3]
Income tax reconciliation [Abstract]
Income before income taxes	$ 514	[1]	$ 1,063	[2]	$ 686	[3]
Federal statutory income tax rate	21.00%	[1]	35.00%	[2]	35.00%	[3]
Expected federal income tax expense	$ 108	[1]	$ 372	[2]	$ 240	[3]
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	22	[1]	26	[2]	27	[3]
Other adjustments	11	[1]	3	[2]	3	[3]
State law change, net of federal income tax	32	[1]	0	[2]	0	[3]
Federal income tax rate reduction	0	[1]	(1,113)	[2]	0	[3]
Excess deferred income tax amortization	(24)	[1]	0	[2]	0	[3]
Other, net	(3)	[1]	(17)	[2]	(16)	[3]
Total	38	[1]	(1,101)	[2]	14	[3]
Total income tax expense (benefit)	$ 146	[1]	$ (729)	[2]	$ 254	[3]
Effective tax rate (in hundredths)	28.00%	[1]	(69.00%)	[2]	37.00%	[3]
Valuation allowance on certain state carryforwards					$ 3
Deferred tax assets:
Benefits and compensation	$ 160		$ 162
Regulatory liabilities	356		347
Loss and credit carryforwards	84		90
Asset retirement obligations	62		68
Other	29		16
Valuation allowance	(18)		(7)
Total deferred tax assets	673		676
Deferred tax liabilities:
Property, plant, and equipment	1,894		1,808
Investment in unconsolidated affiliates	987		927
Regulatory assets	395		473
Investment in marketable securities and indexed debt	478		502
Indexed debt securities derivative	27		13
Other	131		127
Total deferred tax liabilities	3,912		3,850
Net deferred tax liabilities	3,239		3,174
State and Local Jurisdiction [Member]
Increase (decrease) in tax expense resulting from:
State law change, net of federal income tax					6
Deferred tax liabilities:
Operating loss carryforwards	802
Deferred tax assets tax credit carryforwards	18
Houston Electric [Member]
Current income tax expense (benefit):
Federal	109		70		165
State	18		19		18
Total current expense (benefit)	127		89		183
Deferred income tax expense (benefit):
Federal	(38)		(98)		(34)
Total deferred expense (benefit)	(38)		(98)		(34)
Total income tax expense (benefit)	89	[4]	(9)	[5]	149
Income tax reconciliation [Abstract]
Income before income taxes	$ 425	[4]	$ 424	[5]	$ 425
Federal statutory income tax rate	21.00%	[4]	35.00%	[5]	35.00%
Expected federal income tax expense	$ 89	[4]	$ 148	[5]	$ 149
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	14	[4]	12	[5]	12
Federal income tax rate reduction	0	[4]	(158)	[5]	0
Excess deferred income tax amortization	(9)	[4]	0	[5]	0
Other, net	(5)	[4]	(11)	[5]	(12)
Total	0	[4]	(157)	[5]	0
Total income tax expense (benefit)	$ 89	[4]	$ (9)	[5]	$ 149
Effective tax rate (in hundredths)	21.00%	[4]	(2.00%)	[5]	35.00%
Deferred tax assets:
Benefits and compensation	$ 17		$ 28
Regulatory liabilities	205		198
Asset retirement obligations	7		7
Other	12		3
Total deferred tax assets	241		236
Deferred tax liabilities:
Property, plant, and equipment	1,087		1,030
Regulatory assets	177		265
Total deferred tax liabilities	1,264		1,295
Net deferred tax liabilities	1,023		1,059
CERC Corp [Member]
Deferred income tax expense (benefit):
Total deferred expense (benefit)	31		(224)		$ 56
Total income tax expense (benefit)	22		(265)		81
Income tax reconciliation [Abstract]
Income before income taxes	92		319		199
Increase (decrease) in tax expense resulting from:
Total income tax expense (benefit)	22		(265)		81
Deferred tax assets:
Valuation allowance	(18)
CERC Corp [Member] | State and Local Jurisdiction [Member]
Deferred tax liabilities:
Operating loss carryforwards	797
Deferred tax assets tax credit carryforwards	17
CERC Corp [Member] | Internal Revenue Service (IRS) [Member]
Deferred tax liabilities:
Operating loss carryforwards	$ 951
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Deferred tax liabilities:
Tax credit carryforward expiration date	Dec. 31, 2019
Earliest Tax Year [Member] | CERC Corp [Member] | State and Local Jurisdiction [Member]
Deferred tax liabilities:
Tax credit carryforward expiration date	Dec. 31, 2019
Latest Tax Year [Member] | State and Local Jurisdiction [Member]
Deferred tax liabilities:
Tax credit carryforward expiration date	Dec. 31, 2038
Latest Tax Year [Member] | CERC Corp [Member] | State and Local Jurisdiction [Member]
Deferred tax liabilities:
Tax credit carryforward expiration date	Dec. 31, 2038
Excess deferred income taxes [Member]
Deferred tax liabilities:
Net regulatory liability			1,300
Net regulatory liabilities gross-up			300
Excess deferred income taxes [Member] | Houston Electric [Member]
Deferred tax liabilities:
Net regulatory liability			829
Net regulatory liabilities gross-up			180
Excess deferred income taxes [Member] | CERC Corp [Member]
Deferred tax liabilities:
Net regulatory liability			478
Net regulatory liabilities gross-up			$ 121
Federal Income Tax Rate Prior To TCJA [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			35.00%
Federal Income Tax Rate Prior To TCJA [Member] | Houston Electric [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			35.00%
Federal Income Tax Rate Prior To TCJA [Member] | CERC Corp [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			35.00%
Federal Income Tax Rate After TCJA [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			21.00%
Federal Income Tax Rate After TCJA [Member] | Houston Electric [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			21.00%
Federal Income Tax Rate After TCJA [Member] | CERC Corp [Member]
Income tax reconciliation [Abstract]
Federal statutory income tax rate			21.00%
Continuing Operations [Member] | CERC Corp [Member]
Current income tax expense (benefit):
Federal	$ (9)		$ (31)		21
State	0		(10)		4
Total current expense (benefit)	(9)		(41)		25
Deferred income tax expense (benefit):
Federal	10		(249)		41
State	21		25		15
Total deferred expense (benefit)	31		(224)		56
Total income tax expense (benefit)	22	[6]	(265)	[7]	81
Income tax reconciliation [Abstract]
Income before income taxes	$ 92	[6]	$ 319	[7]	$ 199
Federal statutory income tax rate	21.00%	[6]	35.00%	[7]	35.00%
Expected federal income tax expense	$ 19	[6]	$ 112	[7]	$ 70
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	5	[6]	6	[7]	4
State law change, net of federal income tax	0	[6]	0	[7]	6
Federal income tax rate reduction	0	[6]	(396)	[7]	0
Excess deferred income tax amortization	(15)	[6]	0	[7]	0
Other, net	2	[6]	(1)	[7]	(1)
Total	3	[6]	(377)	[7]	11
Total income tax expense (benefit)	$ 22	[6]	$ (265)	[7]	$ 81
Effective tax rate (in hundredths)	24.00%	[6]	(83.00%)	[7]	41.00%
Deferred tax assets:
Benefits and compensation	$ 27		$ 27
Regulatory liabilities	150		150
Loss and credit carryforwards	259		288
Asset retirement obligations	54		60
Other	20		18
Valuation allowance	(18)		(7)
Total deferred tax assets	492		536
Deferred tax liabilities:
Property, plant, and equipment	773		745
Regulatory assets	41		38
Other	84		115
Total deferred tax liabilities	898		898
Net deferred tax liabilities	406		362
Discontinued Operations [Member] | CERC Corp [Member]
Current income tax expense (benefit):
Federal	9		31		$ (21)
State	4		11		2
Total current expense (benefit)	13		42		(19)
Deferred income tax expense (benefit):
Federal	29		56		90
State	4		6		10
Total deferred expense (benefit)	33		62		100
Total income tax expense (benefit)	46		104		81
Income tax reconciliation [Abstract]
Income before income taxes	$ 184		$ 265		$ 208
Federal statutory income tax rate	21.00%		35.00%		35.00%
Expected federal income tax expense	$ 39		$ 93		$ 73
Increase (decrease) in tax expense resulting from:
State income tax expense, net of federal income tax	7		11		8
Total	7		11		8
Total income tax expense (benefit)	$ 46		$ 104		$ 81
Effective tax rate (in hundredths)	25.00%		39.00%		39.00%
Deferred tax liabilities:
Investment in unconsolidated affiliates	$ 0		$ 927
Net deferred tax liabilities	0		927
State Valuation Allowance, net of Federal Income Taxes [Member] | Continuing Operations [Member] | CERC Corp [Member]
Increase (decrease) in tax expense resulting from:
Other adjustments	11	[6]	3	[7]	$ 2
Tax Basis Balance Sheet Adjustment [Member] | Continuing Operations [Member] | CERC Corp [Member]
Increase (decrease) in tax expense resulting from:
Other adjustments	$ 0	[6]	$ 11	[7]	$ 0

[1] Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[2] Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[3] Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

[4] Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[5] Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[6] Recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. This item is partially offset by $15 million of amortization of the net regulatory EDIT liability in certain jurisdictions as decreed by regulators beginning in 2018.

[7] Recognized a $396 million deferred tax benefit from the remeasurement of CERC’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. ASC 740 requires tax impacts of changes in tax laws or rates be reported in continuing operations. Therefore, CERC’s federal income tax benefit generated by the remeasurement of the ADFIT liability for Enable during 2017 and state law changes during 2016 associated with its investment in Enable are reported in continuing operations on CERC’s Statements of Consolidated Income. The ADFIT liability associated with CERC’s investment in Enable is reported as discontinued operations on CERC’s Consolidated Balance Sheets.

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Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Due [Abstract]
2019	$ 6,000,000
2020	6,000,000
2021	5,000,000
2022	4,000,000
2023	3,000,000
2024 and beyond	12,000,000
Total	36,000,000
Total lease expense for all operating leases	9,000,000	$ 10,000,000	$ 10,000,000
Minnesota Service Territory [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Liability recorded for remediation of Minnesota sites	7,000,000
Minnesota Service Territory [Member] | Minimum [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Estimated remediation costs for the Minnesota sites	$ 5,000,000
Years to resolve contingency	30
Minnesota Service Territory [Member] | Maximum [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Estimated remediation costs for the Minnesota sites	$ 32,000,000
Years to resolve contingency	50
Minnehaha Academy Gas Explosion [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Contested amount of fines imposed	$ 200,000
Natural Gas Supply Commitments [Member]
Long-term Purchase Commitment [Line Items]
2019	454,000,000
2020	430,000,000
2021	343,000,000
2022	231,000,000
2023	154,000,000
2024 and beyond	1,446,000,000
CERC Corp [Member] | Minnesota Service Territory [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Liability recorded for remediation of Minnesota sites	7,000,000
CERC Corp [Member] | Minnesota Service Territory [Member] | Minimum [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Estimated remediation costs for the Minnesota sites	$ 5,000,000
Years to resolve contingency	30
CERC Corp [Member] | Minnesota Service Territory [Member] | Maximum [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Estimated remediation costs for the Minnesota sites	$ 32,000,000
Years to resolve contingency	50
CERC Corp [Member] | Minnehaha Academy Gas Explosion [Member]
Legal Environmental And Other Regulatory Matters Legal Matters Gas Market Manipulation Cases Abstract
Contested amount of fines imposed	$ 200,000
CERC Corp [Member] | Natural Gas Supply Commitments [Member]
Long-term Purchase Commitment [Line Items]
2019	454,000,000
2020	430,000,000
2021	343,000,000
2022	231,000,000
2023	154,000,000
2024 and beyond	1,446,000,000
Houston Electric [Member]
Operating Leases, Future Minimum Payments Due [Abstract]
2019	1,000,000
2020	0
2021	0
2022	0
2023	0
2024 and beyond	0
Total	1,000,000
Total lease expense for all operating leases	1,000,000	1,000,000	1,000,000
CERC Corp [Member]
Operating Leases, Future Minimum Payments Due [Abstract]
2019	5,000,000
2020	5,000,000
2021	4,000,000
2022	4,000,000
2023	3,000,000
2024 and beyond	11,000,000
Total	32,000,000
Total lease expense for all operating leases	$ 8,000,000	$ 9,000,000	$ 9,000,000

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Earnings Per Share (CenterPoint Energy) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Numerator:
Income available to common shareholders - basic (1)		$ 90		$ 153		$ (75)		$ 165		$ 1,296	[1]	$ 169	[1]	$ 135	[1]	$ 192	[1]	$ 333	[2]	$ 1,792	[2]	$ 432	[2]
Add back: Series B Preferred Stock dividend																		35		0		0
Income available to common shareholders - diluted (1)	[2]																	$ 333		$ 1,792		$ 432
Denominator:
Weighted average common shares outstanding - basic																		448,829,000		430,964,000		430,606,000
Plus: Incremental shares from assumed conversions:
Weighted average common shares outstanding - diluted																		452,465,000		434,308,000		433,603,000
Basic Earnings Per Common Share		$ 0.18	[3]	$ 0.35	[3]	$ (0.17)	[3]	$ 0.38	[3]	$ 3.01	[3]	$ 0.39	[3]	$ 0.31	[3]	$ 0.45	[3]	$ 0.74		$ 4.16		$ 1.00
Diluted Earnings Per Common Share		$ 0.18	[3]	$ 0.35	[3]	$ (0.17)	[3]	$ 0.38	[3]	$ 2.99	[3]	$ 0.39	[3]	$ 0.31	[3]	$ 0.44	[3]	$ 0.74		$ 4.13		$ 1.00
Reduction in income taxes due to tax reform																		$ 0	[4]	$ 1,113	[5]	$ 0	[6]
Restricted Stock [Member]
Plus: Incremental shares from assumed conversions:
Restricted stock (2)	[7]																	3,636,000		3,344,000		2,997,000
Series B Preferred Stock [Member]
Numerator:
Add back: Series B Preferred Stock dividend																		$ 0		$ 0		$ 0
Plus: Incremental shares from assumed conversions:
Series B Preferred Stock (3)	[8]																	0		0		0
Amount of antidilutive securities excluded from computation of earnings per share																		8,885,000

[1] Income available to common shareholders and Net income for the fourth quarter 2017 include a reduction in income tax expense of $1,113 million, $158 million and $396 million for CenterPoint Energy, Houston Electric and CERC, respectively, due to the TCJA. See Note 15 for further discussion of the impacts of tax reform implementation.

[2] Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

[3] Quarterly earnings (loss) per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings (loss) per common share.

[4] Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[5] Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[6] Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

[7] The potentially dilutive impact from restricted stock awards applies the treasury stock method. Under this method, an increase in the average fair market value of Common Stock can result in a greater dilutive impact from these securities.

[8] The potentially dilutive impact from Series B Preferred Stock applies the if-converted method in calculating diluted earnings per common share. Under this method, diluted earnings per common share is adjusted for the more dilutive effect of the Series B Preferred Stock as a result of either its accumulated dividend for the period in the numerator or the assumed-converted common share equivalent in the denominator. The computation of diluted earnings per common share outstanding for the year ended December 31, 2018 excludes 8,885,000 potentially dilutive shares because to include them would be anti-dilutive. However, these shares could be potentially dilutive in the future.

XML

Unaudited Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Revenues		$ 3,036		$ 2,212		$ 2,186		$ 3,155		$ 2,638		$ 2,098		$ 2,143		$ 2,735		$ 10,589		$ 9,614		$ 7,528
Operating income (loss)		167		226		187		251		308	[1]	297	[1]	240	[1]	291	[1]	831		1,136		1,023
Income (loss) available to common shareholders		$ 90		$ 153		$ (75)		$ 165		$ 1,296	[2]	$ 169	[2]	$ 135	[2]	$ 192	[2]	$ 333	[3]	$ 1,792	[3]	$ 432	[3]
Basic earnings (loss) per common share (1)		$ 0.18	[4]	$ 0.35	[4]	$ (0.17)	[4]	$ 0.38	[4]	$ 3.01	[4]	$ 0.39	[4]	$ 0.31	[4]	$ 0.45	[4]	$ 0.74		$ 4.16		$ 1.00
Diluted earnings (loss) per common share (1)		$ 0.18	[4]	$ 0.35	[4]	$ (0.17)	[4]	$ 0.38	[4]	$ 2.99	[4]	$ 0.39	[4]	$ 0.31	[4]	$ 0.44	[4]	$ 0.74		$ 4.13		$ 1.00
Net income																		$ 368		$ 1,792		$ 432
Reduction in income taxes due to tax reform																		0	[5]	1,113	[6]	0	[7]
Houston Electric [Member]
Revenues		$ 728		$ 897		$ 854		$ 755		$ 765		$ 843		$ 752		$ 638		3,234		2,998		3,059
Operating income (loss)		98		227		181		119		127	[1]	254	[1]	171	[1]	85	[1]	625		637		652
Net income		40		143		101		52		210	[2]	130	[2]	75	[2]	18	[2]	336		433		276
Reduction in income taxes due to tax reform																		$ 0	[8]	158	[9]	$ 0
CERC Corp [Member]
Revenues	[10]	2,303		1,312		1,328		2,400		1,872		1,251		1,387		2,093
Operating income (loss)	[10]	76		(7)		22		131		178	[1]	31	[1]	59	[1]	199	[1]
Income (loss) from continuing operations	[10]	35		(35)		(8)		78		469		(4)		17		102
Income (loss) from discontinued operations, net of tax	[10]	(2)		44		44		52		37		42		37		45
Net income	[10]	$ 33		$ 9		$ 36		$ 130		$ 506	[2]	$ 38	[2]	$ 54	[2]	$ 147	[2]
Reduction in income taxes due to tax reform																				$ 396

[1] Recast to reflect the adoption of ASU 2017-07. See Note 2(r) for further information.

[2] Income available to common shareholders and Net income for the fourth quarter 2017 include a reduction in income tax expense of $1,113 million, $158 million and $396 million for CenterPoint Energy, Houston Electric and CERC, respectively, due to the TCJA. See Note 15 for further discussion of the impacts of tax reform implementation.

[3] Income available to common shareholders for the year ended December 31, 2017 includes a reduction in income tax expense of $1,113 million due to tax reform. See Note 15 for further discussion of the impacts of the TCJA.

[4] Quarterly earnings (loss) per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings (loss) per common share.

[5] Recognized a $32 million deferred tax expense due to state law changes that resulted in remeasurement of state deferred taxes in those jurisdictions. Also recorded an additional $11 million valuation allowance on certain state net operating loss deferred tax assets that are no longer expected to be utilized prior to expiration after the Internal Spin. These items are partially offset by $24 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[6] Recognized a $1.1 billion deferred tax benefit from the remeasurement of CenterPoint Energy’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[7] Recognized a $6 million deferred tax expense in 2016 due to Louisiana state law change and recorded an additional $3 million valuation allowance on certain state carryforwards.

[8] Recognized $9 million of amortization of the net regulatory EDIT liability as decreed by regulators in certain jurisdictions beginning in 2018.

[9] Recognized a $158 million deferred tax benefit from the remeasurement of Houston Electric’s ADFIT liability as a result of the enactment of the TCJA on December 22, 2017, which reduced the U.S. corporate income tax rate from 35% to 21%. For additional information on the 2017 impacts of the TCJA, please see the discussion following the deferred tax assets and liabilities table below.

[10] Amounts have been recast to reflect discontinued operations in all periods presented.

XML

Reportable Segments (Details) - USD ($) $ in Millions		3 Months Ended													12 Months Ended
		Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016		Sep. 04, 2018
Segment Reporting Information [Line Items]
Revenues		$ 3,036		$ 2,212	$ 2,186	$ 3,155	$ 2,638		$ 2,098		$ 2,143		$ 2,735		$ 10,589		$ 9,614		$ 7,528
Depreciation and Amortization															1,243		1,036		1,126
Operating Income (Loss)		167		226	187	251	308	[1]	297	[1]	240	[1]	291	[1]	831		1,136		1,023
Total Assets		27,009					22,736								27,009		22,736		21,829
Expenditures for Long-Lived Assets															1,720		1,494		1,406
Capital expenditures per Statements of Consolidated Cash Flows															1,651		1,426		1,414
Midstream Investments’ equity earnings, net															307		265		208
Total regulatory assets		2,044					2,477								2,044		2,477
Enable Midstream Partners [Member]
Segment Reporting Information [Line Items]
Midstream Investments’ equity earnings, net	[2]														307		265		208
Electric Transmission & Distribution [Member]
Segment Reporting Information [Line Items]
Revenues	[3]														3,232		2,997		3,060
Depreciation and Amortization															917		724		838
Operating Income (Loss)															623		636		653
Expenditures for Long-Lived Assets															952		924		858
Electric Transmission & Distribution [Member] | Affiliates of NRG Energy, Inc. [Member]
Segment Reporting Information [Line Items]
Revenues															705		713		698
Electric Transmission & Distribution [Member] | Affiliates of Vistra Energy Corp. [Member]
Segment Reporting Information [Line Items]
Revenues															251		229		220
Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Revenues															2,931		2,606		2,380
Depreciation and Amortization															277		260		242
Operating Income (Loss)															266		348		321
Expenditures for Long-Lived Assets															638		523		510
Energy Services [Member]
Segment Reporting Information [Line Items]
Revenues															4,411		3,997		2,073
Depreciation and Amortization															16		19		7
Operating Income (Loss)															(47)		126		21
Expenditures for Long-Lived Assets															20		11		5
Midstream Investments [Member]
Segment Reporting Information [Line Items]
Revenues	[4]														0		0		0
Depreciation and Amortization	[4]														0		0		0
Operating Income (Loss)	[4]														0		0		0
Expenditures for Long-Lived Assets	[4]														0		0		0
Midstream Investments [Member] | Enable Midstream Partners [Member]
Segment Reporting Information [Line Items]
Midstream Investments’ equity earnings, net															307		265		208
Other Operations [Member]
Segment Reporting Information [Line Items]
Revenues															15		14		15
Depreciation and Amortization															33		33		39
Operating Income (Loss)															(11)		26		28
Expenditures for Long-Lived Assets															110		36		33
Operating Segments [Member] | Electric Transmission & Distribution [Member]
Segment Reporting Information [Line Items]
Total Assets		10,509					10,292								10,509		10,292		10,211
Operating Segments [Member] | Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Total Assets		6,956					6,608								6,956		6,608		6,099
Operating Segments [Member] | Energy Services [Member]
Segment Reporting Information [Line Items]
Total Assets		1,558					1,521								1,558		1,521		1,102
Operating Segments [Member] | Midstream Investments [Member]
Segment Reporting Information [Line Items]
Total Assets	[4]	2,482					2,472								2,482		2,472		2,505
Operating Segments [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Total Assets	[5]	6,156					2,497								6,156		2,497		2,681
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues															(146)		(85)		(55)
Total Assets		(652)					(654)								(652)		(654)		(769)
Intersegment Eliminations [Member] | Electric Transmission & Distribution [Member]
Segment Reporting Information [Line Items]
Revenues															0		0		0
Intersegment Eliminations [Member] | Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Revenues															(36)		(33)		(29)
Intersegment Eliminations [Member] | Energy Services [Member]
Segment Reporting Information [Line Items]
Revenues															(110)		(52)		(26)
Intersegment Eliminations [Member] | Midstream Investments [Member]
Segment Reporting Information [Line Items]
Revenues	[4]														0		0		0
Intersegment Eliminations [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Revenues															0		0		0
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Expenditures for Long-Lived Assets															(69)		(68)		8
Pension and Other Postretirement Plans Costs [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Total regulatory assets		665					600								665		600		759
Cash and Cash Equivalents [Member]
Segment Reporting Information [Line Items]
Temporary investments		3,900													3,900
Houston Electric [Member]
Segment Reporting Information [Line Items]
Revenues		728		897	854	755	765		843		752		638		3,234		2,998		3,059
Depreciation and Amortization															917		724		838
Operating Income (Loss)		98		$ 227	$ 181	$ 119	127	[1]	$ 254	[1]	$ 171	[1]	$ 85	[1]	625		637		652
Total Assets		10,507					10,292								10,507		10,292
Capital expenditures per Statements of Consolidated Cash Flows															922		875		862
Total regulatory assets		1,124					1,570								1,124		1,570
Houston Electric [Member] | Electric Transmission & Distribution [Member] | Affiliates of NRG Energy, Inc. [Member]
Segment Reporting Information [Line Items]
Revenues															705		713		698
Houston Electric [Member] | Electric Transmission & Distribution [Member] | Affiliates of Vistra Energy Corp. [Member]
Segment Reporting Information [Line Items]
Revenues															251		229		220
CERC Corp [Member]
Segment Reporting Information [Line Items]
Revenues															7,343		6,603		4,454
Depreciation and Amortization															293		279		249
Operating Income (Loss)															222		467		341
Total Assets		8,214	[6]				10,112								8,214	[6]	10,112		9,218
Investment in unconsolidated affiliates - discontinued operations		0					2,472								0		2,472
Expenditures for Long-Lived Assets															658		534		515
Capital expenditures per Statements of Consolidated Cash Flows															633		513		517
Total regulatory assets		258					311								258		311
CERC Corp [Member] | Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Revenues															2,931		2,606		2,380
Depreciation and Amortization															277		260		242
Operating Income (Loss)															266		348		321
Expenditures for Long-Lived Assets															638		523		510
CERC Corp [Member] | Energy Services [Member]
Segment Reporting Information [Line Items]
Revenues															4,411		3,997		2,073
Depreciation and Amortization															16		19		7
Operating Income (Loss)															(47)		126		21
Expenditures for Long-Lived Assets															20		11		5
CERC Corp [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Revenues															1		0		1
Depreciation and Amortization															0		0		0
Operating Income (Loss)															3		(7)		(1)
Expenditures for Long-Lived Assets															0		0		0
CERC Corp [Member] | Operating Segments [Member] | Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Total Assets		6,956	[6]				6,608								6,956	[6]	6,608		6,099
CERC Corp [Member] | Operating Segments [Member] | Energy Services [Member]
Segment Reporting Information [Line Items]
Total Assets		1,558	[6]				1,521								1,558	[6]	1,521		1,102
CERC Corp [Member] | Operating Segments [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Total Assets		66	[6]				70								66	[6]	70		75
CERC Corp [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues															(146)		(85)		(55)
Total Assets		$ (366)	[6]				(559)								(366)	[6]	(559)		(563)
CERC Corp [Member] | Intersegment Eliminations [Member] | Natural Gas Distribution [Member]
Segment Reporting Information [Line Items]
Revenues															(36)		(33)		(29)
CERC Corp [Member] | Intersegment Eliminations [Member] | Energy Services [Member]
Segment Reporting Information [Line Items]
Revenues															(110)		(52)		(26)
CERC Corp [Member] | Intersegment Eliminations [Member] | Other Operations [Member]
Segment Reporting Information [Line Items]
Revenues															0		0		0
CERC Corp [Member] | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Expenditures for Long-Lived Assets															$ (25)		(21)		2
Enable Midstream Partners [Member] | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member] | CERC Corp [Member]
Segment Reporting Information [Line Items]
Revenues																	0		0
Depreciation and Amortization																	0		0
Operating Income (Loss)																	0		0
Investment in unconsolidated affiliates - discontinued operations							$ 2,472	[6]									2,472	[6]	2,505	[6]	$ 2,400
Expenditures for Long-Lived Assets																	$ 0		$ 0

[1] Recast to reflect the adoption of ASU 2017-07. See Note 2(r) for further information.

[2] Represents amounts billed under the Transition Agreements for certain support services provided to Enable. Actual transition services costs are recorded net of reimbursement.

[3] CenterPoint Energy’s and Houston Electric’s Electric Transmission & Distribution revenues from major customers are as follows: Year Ended December 31, 2018 2017 2016 (in millions)Affiliates of NRG $705 $713 $698Affiliates of Vistra Energy Corp. 251 229 220

[4] CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows: Year Ended December 31, 2018 2017 2016 (in millions)Enable $307 $265 $208

[5] Total assets included pension and other postemployment-related regulatory assets of $665 million, $600 million and $759 million as of December 31, 2018, 2017 and 2016, respectively. Additionally, total assets as of December 31, 2018 included $3.9 billion of temporary investments included in Cash and cash equivalents on CenterPoint Energy’s Consolidated Balance Sheets.

[6] On September 4, 2018, CERC completed the Internal Spin. For further information regarding the Internal Spin, see Note 11.

XML

Reportable Segments Revenues by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues by Products and Services:
Revenues	$ 3,036	$ 2,212	$ 2,186	$ 3,155	$ 2,638	$ 2,098	$ 2,143	$ 2,735	$ 10,589	$ 9,614	$ 7,528
Electric Delivery [Member]
Revenues by Products and Services:
Revenues									3,232	2,997	3,060
Retail Gas Sales [Member]
Revenues by Products and Services:
Revenues									4,161	3,634	3,329
Wholesale Gas Sales [Member]
Revenues by Products and Services:
Revenues									3,008	2,811	977
Gas Transportation and Processing [Member]
Revenues by Products and Services:
Revenues									32	29	23
Energy Products Or Services [Member]
Revenues by Products and Services:
Revenues									156	143	139
Houston Electric [Member]
Revenues by Products and Services:
Revenues	$ 728	$ 897	$ 854	$ 755	$ 765	$ 843	$ 752	$ 638	3,234	2,998	3,059
Houston Electric [Member] | Electric Delivery [Member]
Revenues by Products and Services:
Revenues									3,234	2,998	3,059
Houston Electric [Member] | Retail Gas Sales [Member]
Revenues by Products and Services:
Revenues									0	0	0
Houston Electric [Member] | Wholesale Gas Sales [Member]
Revenues by Products and Services:
Revenues									0	0	0
Houston Electric [Member] | Gas Transportation and Processing [Member]
Revenues by Products and Services:
Revenues									0	0	0
Houston Electric [Member] | Energy Products Or Services [Member]
Revenues by Products and Services:
Revenues									0	0	0
CERC Corp [Member]
Revenues by Products and Services:
Revenues									7,343	6,603	4,454
CERC Corp [Member] | Electric Delivery [Member]
Revenues by Products and Services:
Revenues									0	0	0
CERC Corp [Member] | Retail Gas Sales [Member]
Revenues by Products and Services:
Revenues									4,161	3,634	3,329
CERC Corp [Member] | Wholesale Gas Sales [Member]
Revenues by Products and Services:
Revenues									3,008	2,811	977
CERC Corp [Member] | Gas Transportation and Processing [Member]
Revenues by Products and Services:
Revenues									32	29	23
CERC Corp [Member] | Energy Products Or Services [Member]
Revenues by Products and Services:
Revenues									$ 142	$ 129	$ 125

XML

Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest, net of capitalized interest		$ 363	$ 378	$ 406
Income taxes (refunds), net		89	15	(104)
Accounts payable related to capital expenditures		201	144	87
Capital distribution associated with the Internal Spin		0	0	0
Cash and cash equivalents	[1]	4,231	260
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows		4,278	296	381	$ 300
Other, net [Member]
Interest income		28	2	1
Cash and Cash Equivalents [Member]
Temporary investments		3,900
Prepaid Expenses and Other Current Assets [Member]
Restricted cash		46	35
Other Noncurrent Assets [Member]
Restricted cash		1	1
Houston Electric [Member]
Interest, net of capitalized interest		200	205	209
Income taxes (refunds), net		154	76	128
Accounts payable related to capital expenditures		124	104	65
Capital distribution associated with the Internal Spin		0	0	0
Cash and cash equivalents	[2]	335	238
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows		370	274	381	$ 299
Houston Electric [Member] | Other, net [Member]
Interest Income, Other		4	2	1
Houston Electric [Member] | Prepaid Expenses and Other Current Assets [Member]
Restricted cash		34	35
Houston Electric [Member] | Other Noncurrent Assets [Member]
Restricted cash		1	1
CERC Corp [Member]
Interest, net of capitalized interest		105	116	116
Income taxes (refunds), net		3	4	3
Accounts payable related to capital expenditures		80	56	35
Capital distribution associated with the Internal Spin		1,473	0	$ 0
Cash and cash equivalents		14	12
Total cash, cash equivalents and restricted cash shown in Statements of Consolidated Cash Flows		25	12
CERC Corp [Member] | Prepaid Expenses and Other Current Assets [Member]
Restricted cash		11	0
CERC Corp [Member] | Other Noncurrent Assets [Member]
Restricted cash		0	0
Bond Companies [Member] | Houston Electric [Member]
Cash and cash equivalents		$ 335	$ 230

[1] CenterPoint Energy’s Cash and cash equivalents as of December 31, 2018 included $3.9 billion of temporary investments resulting from the Merger financings. CenterPoint Energy recorded interest income of $28 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on CenterPoint Energy’s Statements of Consolidated Income. See Notes 13 and 14 for further details related to the Merger financings.

[2] Houston Electric’s Cash and cash equivalents as of December 31, 2018 and 2017 included $335 million and $230 million, respectively, of cash related to the Bond Companies. Houston Electric recorded interest income of $4 million, $2 million and $1 million for the years ended December 31, 2018, 2017 and 2016, respectively, in Other, net on Houston Electric’s Statement of Consolidated Income.

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Related Party Transactions (Houston Electric and CERC) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Capital distribution to parent associated with the Internal Spin		$ 0	$ 0	$ 0
Houston Electric [Member]
Related Party Transaction [Line Items]
Cash dividends paid to parent		209	180	135
Cash contribution from parent		200	0	374
Capital distribution to parent associated with the Internal Spin		0	0	0
Houston Electric [Member] | Other, net [Member]
Related Party Transaction [Line Items]
Interest income (expense), net (1)	[1]	1	2	(4)
Houston Electric [Member] | Operation And Maintenance Expense [Member]
Related Party Transaction [Line Items]
Net affiliate service charges (billings)		(17)	(9)	(8)
Houston Electric [Member] | Operation And Maintenance Expense [Member] | CenterPoint Energy [Member]
Related Party Transaction [Line Items]
Corporate service charges		190	188	179
Houston Electric [Member] | Accounts and notes receivable (payable) - affiliate companies [Member]
Related Party Transaction [Line Items]
Money pool investments (borrowings) (1)	[2]	$ (1)	$ (60)
Houston Electric [Member] | Investments [Member]
Related Party Transaction [Line Items]
Weighted average interest rate		2.42%	1.90%
CERC Corp [Member]
Related Party Transaction [Line Items]
Cash dividends paid to parent		$ 360	$ 601	643
Cash contribution from parent		960	38	72
Capital distribution to parent associated with the Internal Spin		1,473	0	0
CERC Corp [Member] | Other, net [Member]
Related Party Transaction [Line Items]
Interest income (expense), net (1)	[1]	0	0	0
CERC Corp [Member] | Operation And Maintenance Expense [Member]
Related Party Transaction [Line Items]
Net affiliate service charges (billings)		17	9	8
CERC Corp [Member] | Operation And Maintenance Expense [Member] | CenterPoint Energy [Member]
Related Party Transaction [Line Items]
Corporate service charges		147	128	$ 125
CERC Corp [Member] | Accounts and notes receivable (payable) - affiliate companies [Member]
Related Party Transaction [Line Items]
Money pool investments (borrowings) (1)	[2]	$ 114	$ (570)
CERC Corp [Member] | Investments [Member]
Related Party Transaction [Line Items]
Weighted average interest rate		2.42%	1.90%

[1] Interest income is included in Other, net and interest expense is included in Interest and other finance charges on Houston Electric’s and CERC’s respective Statements of Consolidated Income.

[2] Included in Accounts and notes receivable (payable)–affiliated companies in Houston Electric’s and CERC’s Consolidated Balance Sheets.

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Subsequent Events (Details) - Subsequent Event [Member] - Enable Midstream Partners [Member] $ / shares in Units, $ in Millions	Feb. 08, 2019 USD ($) $ / shares
Series A Preferred Units [Member]
Subsequent Event [Line Items]
Declaration Date	Feb. 08, 2019
Record Date	Feb. 08, 2019
Payment Date	Feb. 14, 2019
Distributions Declared, Per Unit | $ / shares	$ 0.625
Expected cash distribution on Enable's Series A Preferred Units | $	$ 9
Common Units [Member]
Subsequent Event [Line Items]
Declaration Date	Feb. 08, 2019
Record Date	Feb. 19, 2019
Payment Date	Feb. 26, 2019
Distributions Declared, Per Unit | $ / shares	$ 0.318
Expected cash distribution on Enable Common Units | $	$ 74