10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2017

OR

o  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from_____to_____

Commission	Registrant; State of Incorporation;	IRS Employer
File Number	Address; and Telephone Number	Identification No.
1-9513	CMS ENERGY CORPORATION	38-2726431
	(A Michigan Corporation)
	One Energy Plaza, Jackson, Michigan 49201
	(517) 788-0550
1-5611	CONSUMERS ENERGY COMPANY	38-0442310
	(A Michigan Corporation)
	One Energy Plaza, Jackson, Michigan 49201
	(517) 788-0550

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.

CMS Energy Corporation: Yes x  No o Consumers Energy Company: Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data file required to be submitted and posted 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 and post such files).

CMS Energy Corporation: Yes x  No o Consumers Energy Company: Yes x  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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.

CMS Energy Corporation:
Large accelerated filer x	Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company)	Smaller reporting company o
Emerging growth company o
Consumers Energy Company:
Large accelerated filer o	Accelerated filer o
Non-accelerated filer x (Do not check if a smaller reporting company)	Smaller reporting company o
Emerging growth company 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 Exchange Act.

CMS Energy Corporation: o Consumers Energy Company: o

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

CMS Energy Corporation: Yes o  No x Consumers Energy Company: Yes o  No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock at October 10, 2017:

CMS Energy Corporation:
CMS Energy Common Stock, $0.01 par value
(including 443,148 shares owned by Consumers Energy Company)	282,083,585
Consumers Energy Company:
Consumers Common Stock, $10 par value, privately held by CMS Energy Corporation	84,108,789

CMS Energy Corporation

Consumers Energy Company

Quarterly Reports on Form 10-Q to the Securities and Exchange Commission for the Period Ended September 30, 2017

TABLE OF CONTENTS

Glossary		2
Filing Format		7
Available Information		7
Forward-Looking Statements and Information		7
Part I—Financial Information		11
Item 1.	Financial Statements	11
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	71
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	71
Item 4.	Controls and Procedures	71
Part II—Other Information		71
Item 1.	Legal Proceedings	71
Item 1A.	Risk Factors	72
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	72
Item 3.	Defaults Upon Senior Securities	72
Item 4.	Mine Safety Disclosures	72
Item 5.	Other Information	72
Item 6.	Exhibits	73
Signatures		74

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GLOSSARY

Certain terms used in the text and financial statements are defined below.

2016 Energy Law
Comprehensive energy reform package enacted in Michigan in 2016

2016 Form 10-K
Each of CMS Energy’s and Consumers’ Annual Report on Form 10-K for the year ended December 31, 2016

ABATE
Association of Businesses Advocating Tariff Equity

AOCI
Accumulated other comprehensive income (loss)

ARO
Asset retirement obligation

ASU
Financial Accounting Standards Board Accounting Standards Update

Bay Harbor
A residential/commercial real estate area located near Petoskey, Michigan, in which CMS Energy sold its interest in 2002

bcf
Billion cubic feet

Cantera Gas Company
Cantera Gas Company LLC, a non-affiliated company, formerly known as CMS Field Services

Cantera Natural Gas, Inc.
Cantera Natural Gas, Inc., a non-affiliated company that purchased CMS Field Services

CCR
Coal combustion residual

CEO
Chief Executive Officer

CERCLA
Comprehensive Environmental Response, Compensation, and Liability Act of 1980

CFO
Chief Financial Officer

Clean Air Act
Federal Clean Air Act of 1963, as amended

Clean Water Act
Federal Water Pollution Control Act of 1972, as amended

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CMS Capital
CMS Capital, L.L.C., a wholly owned subsidiary of CMS Energy

CMS Energy
CMS Energy Corporation and its consolidated subsidiaries, unless otherwise noted; the parent of Consumers and CMS Enterprises

CMS Enterprises
CMS Enterprises Company, a wholly owned subsidiary of CMS Energy

CMS Field Services
CMS Field Services, Inc., a former wholly owned subsidiary of CMS Gas Transmission Company, a wholly owned subsidiary of CMS Enterprises

CMS Land
CMS Land Company, a wholly owned subsidiary of CMS Capital

CMS MST
CMS Marketing, Services and Trading Company, a wholly owned subsidiary of CMS Enterprises, whose name was changed to CMS Energy Resource Management Company in 2004

Consumers
Consumers Energy Company and its consolidated subsidiaries, unless otherwise noted; a wholly owned subsidiary of CMS Energy

CSAPR
The Cross-State Air Pollution Rule

DB Pension Plan
Defined benefit pension plan of CMS Energy and Consumers, including certain present and former affiliates and subsidiaries

DB SERP
Defined Benefit Supplemental Executive Retirement Plan

DIG
Dearborn Industrial Generation, L.L.C., a wholly owned subsidiary of Dearborn Industrial Energy, L.L.C., a wholly owned subsidiary of CMS Energy

Dodd-Frank Act
Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010

EBITDA
Earnings before interest, taxes, depreciation, and amortization

EEI
Edison Electric Institute, an association representing all U.S. investor-owned electric companies

EnerBank
EnerBank USA, a wholly owned subsidiary of CMS Capital

energy waste reduction
The reduction of energy consumption through energy efficiency and demand-side energy conservation, as established under the 2016 Energy Law

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Entergy
Entergy Corporation, a non-affiliated company

EPA
U.S. Environmental Protection Agency

EPS
Earnings per share

Exchange Act
Securities Exchange Act of 1934

FDIC
Federal Deposit Insurance Corporation

FERC
The Federal Energy Regulatory Commission

Forsite
Forsite Development, Inc. and its subsidiaries, each a non-affiliated company

FTR
Financial transmission right

GAAP
U.S. Generally Accepted Accounting Principles

Gas AMR
Consumers’ gas automated meter reading project, which involves the installation of communication modules to allow drive-by meter reading

GCR
Gas cost recovery

Genesee
Genesee Power Station Limited Partnership, a variable interest entity in which HYDRA-CO Enterprises, Inc., a wholly owned subsidiary of CMS Enterprises, has a 50-percent interest

kWh
Kilowatt-hour, a unit of energy equal to one thousand watt-hours

Ludington
Ludington pumped-storage plant, jointly owned by Consumers and DTE Electric Company, a non-affiliated company

MATS
Mercury and Air Toxics Standards, which limit mercury, acid gases, and other toxic pollution from coal-fueled and oil-fueled power plants

MD&A
Management’s Discussion and Analysis of Financial Condition and Results of Operations

MDEQ
Michigan Department of Environmental Quality

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MGP
Manufactured gas plant

Michigan Mercury Rule
Michigan Air Pollution Control Rules, Part 15, Emission Limitations and Prohibitions – Mercury, addressing mercury emissions from coal-fueled electric generating units

MISO
Midcontinent Independent System Operator, Inc.

mothball
To place a generating unit into a state of extended reserve shutdown in which the unit is inactive and unavailable for service for a specified period, during which the unit can be brought back into service after receiving appropriate notification and completing any necessary maintenance or other work; generation owners in MISO must request approval to mothball a unit, and MISO then evaluates the request for reliability impacts

MPSC
Michigan Public Service Commission

MW
Megawatt, a unit of power equal to one million watts

MWh
Megawatt-hour, a unit of energy equal to one million watt-hours

NAAQS
National Ambient Air Quality Standards

NPDES
National Pollutant Discharge Elimination System, a permit system for regulating point sources of pollution under the Clean Water Act

NREPA
Part 201 of the Michigan Natural Resources and Environmental Protection Act, a statute that covers environmental activities including remediation

NSR
New Source Review, a construction-permitting program under the Clean Air Act

OPEB
Other Post-Employment Benefits

OPEB Plan
Postretirement health care and life insurance plans of CMS Energy and Consumers, including certain present and former affiliates and subsidiaries

Palisades
Palisades nuclear power plant, sold by Consumers to Entergy in 2007

PCB
Polychlorinated biphenyl

PPA
Power purchase agreement

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PSCR
Power supply cost recovery

RCRA
The Federal Resource Conservation and Recovery Act of 1976

REC
Renewable energy credit

ROA
Retail Open Access, which allows electric generation customers to choose alternative electric suppliers pursuant to a Michigan statute enacted in 2000

SEC
U.S. Securities and Exchange Commission

securitization
A financing method authorized by statute and approved by the MPSC which allows a utility to sell its right to receive a portion of the rate payments received from its customers for the repayment of securitization bonds issued by a special-purpose entity affiliated with such utility

Smart Energy
Consumers’ Smart Energy grid modernization project, which includes the installation of smart meters that transmit and receive data, a two-way communications network, and modifications to Consumers’ existing information technology system to manage the data and enable changes to key business processes

T.E.S. Filer City
T.E.S. Filer City Station Limited Partnership, a variable interest entity in which HYDRA-CO Enterprises, Inc., a wholly owned subsidiary of CMS Enterprises, has a 50-percent interest

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FILING FORMAT

This combined Form 10-Q is separately filed by CMS Energy and Consumers. Information in this combined Form 10-Q relating to each individual registrant is filed by such registrant on its own behalf. Consumers makes no representation regarding information relating to any other companies affiliated with CMS Energy other than its own subsidiaries. None of CMS Energy, CMS Enterprises, nor any of CMS Energy’s other subsidiaries (other than Consumers) has any obligation in respect of Consumers’ debt securities and holders of such debt securities should not consider the financial resources or results of operations of CMS Energy, CMS Enterprises, nor any of CMS Energy’s other subsidiaries (other than Consumers and its own subsidiaries (in relevant circumstances)) in making a decision with respect to Consumers’ debt securities. Similarly, neither Consumers nor any other subsidiary of CMS Energy has any obligation in respect of debt securities of CMS Energy.

This report should be read in its entirety. No one section of this report deals with all aspects of the subject matter of this report. This report should be read in conjunction with the consolidated financial statements and related notes and with MD&A included in the 2016 Form 10-K.

AVAILABLE INFORMATION

CMS Energy’s internet address is www.cmsenergy.com. CMS Energy routinely posts important information on its website and considers the Investor Relations section, www.cmsenergy.com/investor-relations, a channel of distribution. Information contained on CMS Energy’s website is not incorporated herein.

FORWARD-LOOKING STATEMENTS AND INFORMATION

This Form 10-Q and other CMS Energy and Consumers disclosures may contain forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995. The use of “might,” “may,” “could,” “should,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” “forecasts,” “predicts,” “assumes,” and other similar words is intended to identify forward-looking statements that involve risk and uncertainty. This discussion of potential risks and uncertainties is designed to highlight important factors that may impact CMS Energy’s and Consumers’ businesses and financial outlook. CMS Energy and Consumers have no obligation to update or revise forward-looking statements regardless of whether new information, future events, or any other factors affect the information contained in the statements. These forward-looking statements are subject to various factors that could cause CMS Energy’s and Consumers’ actual results to differ materially from the results anticipated in these statements. These factors include, but are not limited to, the following, all of which are potentially significant:

·the impact of new regulation by the MPSC, FERC, and other applicable governmental proceedings and regulations, including any associated impact on electric or gas rates or rate structures

·potentially adverse regulatory treatment or failure to receive timely regulatory orders affecting Consumers that are or could come before the MPSC, FERC, or other governmental authorities

·changes in the performance of or regulations applicable to MISO, Michigan Electric Transmission Company, LLC, pipelines, railroads, vessels, or other service providers that CMS Energy, Consumers, or any of their affiliates rely on to serve their customers

·the adoption of federal or state laws or regulations or challenges to federal or state laws or regulations, or changes in applicable laws, rules, regulations, principles, or practices, or in their interpretation, such as those related to energy policy and ROA, infrastructure integrity or security,

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gas pipeline safety, gas pipeline capacity, energy waste reduction, the environment, regulation or deregulation, reliability, health care reforms (including comprehensive health care reform enacted in 2010), taxes, accounting matters, climate change, air emissions, renewable energy, potential effects of the Dodd-Frank Act, and other business issues that could have an impact on CMS Energy’s, Consumers’, or any of their affiliates’ businesses or financial results

·factors affecting operations, such as costs and availability of personnel, equipment, and materials; weather conditions; natural disasters; catastrophic weather-related damage; scheduled or unscheduled equipment outages; maintenance or repairs; environmental incidents; failures of equipment or materials; and electric transmission and distribution or gas pipeline system constraints

·increases in demand for renewable energy by customers seeking to meet sustainability goals

·the ability of Consumers to execute its cost-reduction strategies

·potentially adverse regulatory or legal interpretations or decisions regarding environmental matters, or delayed regulatory treatment or permitting decisions that are or could come before the MDEQ, EPA, and/or U.S. Army Corps of Engineers, and potential environmental remediation costs associated with these interpretations or decisions, including those that may affect Bay Harbor or Consumers’ routine maintenance, repair, and replacement classification under NSR regulations

·changes in energy markets, including availability and price of electric capacity and the timing and extent of changes in commodity prices and availability and deliverability of coal, natural gas, natural gas liquids, electricity, oil, and certain related products

·the price of CMS Energy common stock, the credit ratings of CMS Energy and Consumers, capital and financial market conditions, and the effect of these market conditions on CMS Energy’s and Consumers’ interest costs and access to the capital markets, including availability of financing to CMS Energy, Consumers, or any of their affiliates

·the investment performance of the assets of CMS Energy’s and Consumers’ pension and benefit plans, the discount rates used in calculating the plans’ obligations, and the resulting impact on future funding requirements

·the impact of the economy, particularly in Michigan, and potential future volatility in the financial and credit markets on CMS Energy’s, Consumers’, or any of their affiliates’ revenues, ability to collect accounts receivable from customers, or cost and availability of capital

·changes in the economic and financial viability of CMS Energy’s and Consumers’ suppliers, customers, and other counterparties and the continued ability of these third parties, including those in bankruptcy, to meet their obligations to CMS Energy and Consumers

·population changes in the geographic areas where CMS Energy and Consumers conduct business

·national, regional, and local economic, competitive, and regulatory policies, conditions, and developments

·loss of customer demand for electric generation supply to alternative electric suppliers, increased use of distributed generation, or energy waste reduction

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·federal regulation of electric sales and transmission of electricity, including periodic re-examination by federal regulators of CMS Energy’s and Consumers’ market-based sales authorizations

·the impact of credit markets, economic conditions, and any new banking and consumer protection regulations on EnerBank

·the availability, cost, coverage, and terms of insurance, the stability of insurance providers, and the ability of Consumers to recover the costs of any insurance from customers

·the effectiveness of CMS Energy’s and Consumers’ risk management policies, procedures, and strategies, including strategies to hedge risk related to future prices of electricity, natural gas, and other energy-related commodities

·factors affecting development of electric generation projects and gas and electric transmission and distribution infrastructure replacement, conversion, and expansion projects, including factors related to project site identification, construction material pricing, schedule delays, availability of qualified construction personnel, permitting, acquisition of property rights, and government approvals

·potential disruption to, interruption of, or other impacts on facilities, utility infrastructure, or operations due to accidents, explosions, physical disasters, cyber incidents, vandalism, war, or terrorism, and the ability to obtain or maintain insurance coverage for these events

·changes or disruption in fuel supply, including but not limited to supplier bankruptcy and delivery disruptions

·potential costs, lost revenues, or other consequences resulting from misappropriation of assets or sensitive information, corruption of data, or operational disruption in connection with a cyber attack or other cyber incident

·technological developments in energy production, storage, delivery, usage, and metering

·the ability to implement technology successfully

·the impact of CMS Energy’s and Consumers’ integrated business software system and its effects on their operations, including utility customer billing and collections

·adverse consequences resulting from any past, present, or future assertion of indemnity or warranty claims associated with assets and businesses previously owned by CMS Energy or Consumers, including claims resulting from attempts by foreign or domestic governments to assess taxes on or to impose environmental liability associated with past operations or transactions

·the outcome, cost, and other effects of any legal or administrative claims, proceedings, investigations, or settlements

·the reputational impact on CMS Energy and Consumers of operational incidents, violations of corporate policies, regulatory violations, inappropriate use of social media, and other events

·restrictions imposed by various financing arrangements and regulatory requirements on the ability of Consumers and other subsidiaries of CMS Energy to transfer funds to CMS Energy in the form of cash dividends, loans, or advances

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·earnings volatility resulting from the application of fair value accounting to certain energy commodity contracts or interest rate contracts

·changes in financial or regulatory accounting principles or policies

·other matters that may be disclosed from time to time in CMS Energy’s and Consumers’ SEC filings, or in other public documents

All forward-looking statements should be considered in the context of the risk and other factors described above and as detailed from time to time in CMS Energy’s and Consumers’ SEC filings. For additional details regarding these and other uncertainties, see Part I—Item 1. Financial Statements—MD&A—Outlook and Notes to the Unaudited Consolidated Financial Statements—Note 2, Regulatory Matters and Note 3, Contingencies and Commitments; and Part II—Item 1A. Risk Factors.

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Part I—Financial Information

Item 1.Financial Statements

INDEX TO FINANCIAL STATEMENTS

Management’s Discussion and Analysis of Financial Condition and Results of Operations		12
CMS Energy Consolidated Financial Statements		36
Consolidated Statements of Income (Unaudited)		36
Consolidated Statements of Comprehensive Income (Unaudited)		37
Consolidated Statements of Cash Flows (Unaudited)		39
Consolidated Balance Sheets (Unaudited)		40
Consolidated Statements of Changes in Equity (Unaudited)		42
Consumers Consolidated Financial Statements		44
Consolidated Statements of Income (Unaudited)		44
Consolidated Statements of Comprehensive Income (Unaudited)		45
Consolidated Statements of Cash Flows (Unaudited)		47
Consolidated Balance Sheets (Unaudited)		48
Consolidated Statements of Changes in Equity (Unaudited)		50
Notes to the Unaudited Consolidated Financial Statements		51
1:	New Accounting Standards	51
2:	Regulatory Matters	53
3:	Contingencies and Commitments	54
4:	Financings and Capitalization	58
5:	Fair Value Measurements	60
6:	Financial Instruments	62
7:	Notes Receivable	64
8:	Retirement Benefits	65
9:	Income Taxes	66
10:	Earnings Per Share—CMS Energy	67
11:	Cash and Cash Equivalents	67
12:	Reportable Segments	68

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CMS Energy Corporation

Consumers Energy Company

Management’s Discussion and Analysis of Financial Condition and Results of Operations

This MD&A is a combined report of CMS Energy and Consumers.

EXECUTIVE OVERVIEW

CMS Energy is an energy company operating primarily in Michigan. It is the parent holding company of several subsidiaries, including Consumers, an electric and gas utility, and CMS Enterprises, primarily a domestic independent power producer. Consumers’ electric utility operations include the generation, purchase, transmission, distribution, and sale of electricity, and Consumers’ gas utility operations include the purchase, transmission, storage, distribution, and sale of natural gas. Consumers’ customer base consists of a mix of residential, commercial, and diversified industrial customers. CMS Enterprises, through its subsidiaries and equity investments, owns and operates power generation facilities.

CMS Energy and Consumers manage their businesses by the nature of services each provides. CMS Energy operates principally in three business segments: electric utility; gas utility; and enterprises, its non-utility operations and investments. Consumers operates principally in two business segments: electric utility and gas utility.

CMS Energy and Consumers earn revenue and generate cash from operations by providing electric and natural gas utility services; electric distribution, transmission, and generation; gas transmission, storage, and distribution; and other energy-related services. Their businesses are affected primarily by:

·regulation and regulatory matters

·economic conditions

·weather

·energy commodity prices

·interest rates

·their securities’ credit ratings

CMS Energy’s purpose is to achieve world class performance while delivering hometown service. CMS Energy is focused on the “triple bottom line” of people, planet, and profit, which is underpinned by performance. This purpose and focus enhance and are supported by CMS Energy’s and Consumers’ business strategy, whose key elements are safe and excellent operations, customer value, utility investment, fair and timely regulation, and consistent financial performance. The companies are committed to sustainable business practices and to a strong ethical culture. Consideration of climate change risk and other environmental risks are embedded in the companies’ strategy, business planning, and enterprise risk management processes. Consumers’ 2017 Sustainability Report, which is available to the public, describes the progress that Consumers has made in the four foundational areas of safe and excellent operations, environmental quality, social responsibility, and economic prosperity. In a 2016 report published by Sustainalytics, a global leader in sustainability research and analysis, CMS Energy scored the highest among 54 U.S. utilities in environmental, social, and governance performance.

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Safe and Excellent Operations

The safety of employees, customers, and the general public remains a priority of CMS Energy and Consumers. Accordingly, CMS Energy and Consumers have worked to integrate a set of safety principles into their business operations and culture. These principles include complying with applicable safety, health, and security regulations and implementing programs and processes aimed at continually improving safety and security conditions. The number of recordable safety incidents in 2016 was the lowest in Consumers’ history and its incident rate was the lowest among its EEI peer group.

Customer Value

Consumers places a high priority on customer value. Consumers’ customer-driven investment program is aimed at improving safety and increasing electric and gas reliability, which has resulted in measureable improvements in customer satisfaction.

Additionally, Consumers has undertaken several initiatives to keep electricity and natural gas affordable for its customers. These initiatives include the adoption of a lean operating model that is focused on completing work safely and correctly the first time, thus minimizing rework and waste, while delivering services on time. Other cost-saving initiatives undertaken by Consumers include accelerated pension funding, employee and retiree health care cost sharing, replacement of coal-fueled generation with more efficient gas-fueled generation, targeted infrastructure investment, including the installation of smart meters, negotiated labor agreements, information and control system efficiencies, and productivity improvements. In addition, Consumers’ gas commodity costs declined by 68 percent from 2006 through 2016, due not only to a decrease in market prices but also to Consumers’ improvements to its gas infrastructure and optimization of its gas purchasing and storage strategy. These gas commodity savings are passed on to customers.

Utility Investment

Consumers expects to spend $18 billion on infrastructure upgrades and replacements and electric supply projects from 2017 through 2026. While it has substantially more investment opportunities that would add customer value, Consumers has prioritized its spending based on the criteria of enhancing public safety, increasing reliability, and maintaining affordability for its customers. Consumers’ investment program is expected to result in annual rate-base growth of six to eight percent. This rate-base growth, together with cost-control initiatives, should allow Consumers to maintain sustainable customer base rate increases (excluding PSCR and GCR charges) at or below the rate of inflation.

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Presented in the following illustration are planned capital expenditures of $9.0 billion that Consumers expects to make from 2017 through 2021:

		Gas distribution ($4.0 billion)
		Electric distribution ($4.0 billion)
		Electric supply ($1.0 billion)

Consumers’ plans to spend $8.0 billion over the next five years to maintain and upgrade its gas and electric distribution systems in order to enhance reliability and improve customer satisfaction. These infrastructure projects comprise $4.0 billion at the gas utility to sustain deliverability, enhance pipeline integrity and safety, replace mains and services, and enhance transmission and storage systems, and $4.0 billion at the electric utility to strengthen circuits and substations and replace poles. Consumers also expects to spend $1.0 billion on electric supply projects, representing new generation, including renewable generation, and environmental investments needed to comply with state and federal laws and regulations.

Regulation

Regulatory matters are a key aspect of CMS Energy’s and Consumers’ businesses, particularly Consumers’ rate cases and regulatory proceedings before the MPSC. Important regulatory events and developments are summarized below.

·Electric Rate Case: In March 2017, Consumers filed an application with the MPSC seeking an annual rate increase of $173 million, based on a 10.5 percent authorized return on equity. In September 2017, Consumers reduced its requested annual rate increase to $148 million. In October 2017, Consumers self-implemented an annual rate increase of $130 million, subject to refund with interest and potential penalties.

·Gas Rate Case: In August 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $90 million, based on a 10.6 percent authorized return on equity. In January 2017, Consumers self-implemented an annual rate increase of $20 million.

The MPSC issued an order in July 2017, authorizing an annual rate increase of $29 million beginning in August 2017. The MPSC also approved an investment recovery mechanism that will provide for additional annual rate increases of $18 million beginning in 2018 and another $18 million beginning in 2019 for incremental investments that Consumers plans to make in those

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years, subject to reconciliation. The investment recovery surcharge will remain in effect until rates are reset in a subsequent general rate case.

·Palisades PPA: In December 2016, Consumers and Entergy reached an agreement to terminate their PPA in May 2018, four years ahead of schedule, contingent on the MPSC’s approval of Consumers’ recovery of the negotiated termination payment in electric rates. In February 2017, Consumers requested authorization to recover the termination payment through securitization. In September 2017, the MPSC issued a securitization financing order authorizing Consumers to recover only a portion of the termination payment. As a result, Consumers and Entergy agreed not to terminate the PPA, which is now expected to continue until April 2022 under its original terms.

In December 2016, Michigan’s governor signed the 2016 Energy Law, which became effective in April 2017. Among other things, the 2016 Energy Law:

·raises the renewable energy standard from the present ten-percent requirement to 12.5 percent in 2019 and 15 percent in 2021

·establishes a goal of 35 percent combined renewable energy and energy waste reduction by 2025

·authorizes incentives for demand response programs and expands existing incentives for energy efficiency programs

·authorizes incentives for new PPAs with non-affiliates

·establishes an integrated planning process for new generation resources

·shortens from twelve months to ten months the time by which the MPSC must issue a final order in general rate cases, but prohibits electric and gas utilities from filing general rate cases for increases in rates more often than once every twelve months

·eliminates utilities’ self-implementation of rates under general rate cases

·requires the MPSC to implement equitable cost-of-service rates for customers participating in a net metering program

The 2016 Energy Law also establishes a path to ensure that forward capacity is secured for all electric customers in Michigan, including customers served by alternative electric suppliers under ROA. Under existing Michigan law, electric customers in Consumers’ service territory are allowed to buy electric generation service from alternative electric suppliers in an aggregate amount up to ten percent of Consumers’ weather-adjusted retail sales for the preceding calendar year. The 2016 Energy Law retains the ten percent cap on ROA, with certain exceptions. The new law also authorizes the MPSC to ensure that alternative electric suppliers have procured enough capacity to cover their anticipated capacity requirements for the four-year forward period. In March 2017, the MPSC indicated that it plans to achieve this objective through the use of a state reliability mechanism. Under the mechanism proposed by the MPSC, if an alternative electric supplier did not demonstrate that it had procured its capacity requirements for the four-year forward period, ROA customers could pay a charge to the utility for capacity that is not provided by the alternative electric supplier.

CMS Energy’s and Consumers’ operations are subject to various state and federal environmental and health and safety laws and regulations. The companies are monitoring numerous legislative and regulatory initiatives, including those to regulate greenhouse gases, and related litigation. They are also monitoring potential changes in policy under the Trump administration. While CMS Energy and Consumers cannot predict the outcome of these matters, they intend to continue to move forward with their clean energy plan, their carbon reduction goals, and their emphasis on supply diversity. Environmental statutes and regulations are expected to continue to have a material effect on CMS Energy and Consumers.

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Financial Performance

For the nine months ended September 30, 2017, CMS Energy’s net income available to common stockholders was $463 million and diluted EPS were $1.65. This compares with net income available to common stockholders of $474 million and diluted EPS of $1.70 for the nine months ended September 30, 2016. In 2017, benefits from electric and gas rate increases and higher weather-adjusted electric and gas deliveries were offset by higher depreciation on increased plant in service and by the impacts of mild weather on electric and gas sales.

Consumers’ utility operations are seasonal. The consumption of electric energy typically increases in the summer months, due primarily to the use of air conditioners and other cooling equipment, while peak demand for natural gas occurs in the winter due to colder temperatures and the resulting use of natural gas as heating fuel. In addition, Consumers’ electric rates, which follow a seasonal rate design, are higher in the summer months than in the remaining months of the year. A more detailed discussion of the factors affecting CMS Energy’s and Consumers’ performance can be found in the Results of Operations section that follows this Executive Overview.

Consumers expects that continued economic growth in its service territory will drive its total electric deliveries to increase annually by about one-half percent on average through 2021, net of the impacts of energy waste reduction programs. Consumers is projecting that its gas deliveries will remain stable through 2021. This outlook reflects growth in gas demand offset by energy efficiency and conservation.

As Consumers seeks to continue to receive fair and timely regulatory treatment, delivering customer value will remain a key strategic priority. In order to minimize increases in customer base rates, Consumers will continue to pursue cost savings through its lean operations model, and will continue to give priority to infrastructure investments that increase customer value or lower costs.

Consumers expects to continue to have sufficient borrowing capacity to fund its investment-based growth plans. CMS Energy also expects its sources of liquidity to remain sufficient to meet its cash requirements. To identify potential implications for CMS Energy’s and Consumers’ businesses and future financial needs, the companies will continue to monitor developments in the financial and credit markets, as well as government policy responses to those developments.

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RESULTS OF OPERATIONS

CMS Energy Consolidated Results of Operations

	In Millions, Except Per Share Amounts
		Three Months Ended							Nine Months Ended
September 30		2017		2016		Change			2017		2016		Change
Net Income Available to Common Stockholders		$	172	$	186	$	(14	)	$	463	$	474	$	(11	)
Basic Earnings Per Share		$	0.61	$	0.67	$	(0.06	)	$	1.65	$	1.71	$	(0.06	)
Diluted Earnings Per Share		$	0.61	$	0.67	$	(0.06	)	$	1.65	$	1.70	$	(0.05	)

	In Millions
	Three Months Ended									Nine Months Ended
September 30	2017			2016			Change			2017			2016			Change
Electric utility	$	176		$	191		$	(15	)	$	394		$	395		$	(1	)
Gas utility	5			3			2			101			102			(1		)
Enterprises	8			8			-			27			17			10
Corporate interest and other	(17		)	(16		)	(1		)	(59		)	(40		)	(19		)
Net Income Available to Common Stockholders	$	172		$	186		$	(14	)	$	463		$	474		$	(11	)

Presented in the following table are specific after-tax changes to net income available to common stockholders:

	In Millions
	September 30, 2017 better/(worse) than 2016
Reasons for the change	Three Months Ended			Nine Months Ended
Consumers electric utility and gas utility
Electric sales
Weather	$     (37)			$     (44)
Non-weather	4	$     (33)		17	$     (27)
Gas sales
Weather	2			(12)
Non-weather	(3)	(1)		8	(4)
Electric rate increase		7			40
Gas rate increase		2			8
State income tax benefit in 2017		16			16
Voluntary separation program costs in 2016		7			7
Property tax settlement in 2017		-			7
Depreciation and amortization		(5)			(33)
Other, including intercompany gain in 2017		(6)	$     (13)		(16)	$     (2)
Enterprises
Subsidiary earnings			-			10
Corporate interest and other
Elimination of intercompany gain in 2017			-			(9)
Michigan tax settlement in 2016			-			(5)
Other			(1)			(5)
Total change			$     (14)			$     (11)

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Consumers Electric Utility Results of Operations

												In Millions
	Three Months Ended							Nine Months Ended
September 30	2017		2016		Change			2017		2016			Change
Net Income Available to Common Stockholders	$	176	$	191	$	(15	)	$	394	$	395		$	(1	)
Reasons for the change
Electric deliveries and rate increases					$	(45	)						$	19
Power supply costs and related revenue					3								3
Maintenance and other operating expenses					-								(20		)
Depreciation and amortization					(9		)						(39		)
General taxes					-								7
Other income, net of expenses					(2		)						2
Interest charges					(1		)						(5		)
Income taxes					39								32
Total change					$	(15	)						$	(1	)

Following is a discussion of significant changes to net income available to common stockholders.

Electric Deliveries and Rate Increases: For the three months ended September 30, 2017, electric delivery revenues decreased $45 million compared with 2016. This change reflected a $61 million decrease in sales due primarily to milder summer weather, offset partially by a $12 million rate increase and a $4 million increase in energy efficiency program revenues. Deliveries to end-use customers were 10.0 billion kWh in 2017 and 10.7 billion kWh in 2016.

For the nine months ended September 30, 2017, electric delivery revenues increased $19 million compared with 2016. This change reflected a $66 million rate increase, a $12 million increase in energy efficiency program revenues, and a $2 million increase in other revenues. These increases were offset partially by a $61 million decrease in sales due primarily to milder summer weather. Deliveries to end-use customers were 28.2 billion kWh in 2017 and 28.9 billion kWh in 2016.

Maintenance and Other Operating Expenses: For the three months ended September 30, 2017, maintenance and other operating expenses were unchanged compared with 2016. A $6 million reduction in expenses reflected the absence, in 2017, of a 2016 voluntary separation plan. Additionally, postretirement benefit costs decreased $2 million, comprising a $5 million reduction associated with the early adoption of a new accounting standard, offset partially by $3 million of cost increases. For additional details on the implementation of this standard, see Note 1, New Accounting Standards. These decreases were offset fully by a $4 million increase in energy efficiency program costs and a $4 million increase in service restoration and other operating and maintenance expenses.

For the nine months ended September 30, 2017, maintenance and other operating expenses increased $20 million compared with 2016. This change reflected increases of $17 million in service restoration costs following severe storms, $12 million in energy efficiency program costs, $4 million in forestry expenses, and $5 million in other operating and maintenance expenses. Also contributing to the change was the absence, in 2017, of a $4 million benefit associated with a Michigan use tax settlement in 2016. These increases were offset partially by the absence, in 2017, of $8 million in expenses at the seven coal-fuel electric generating units that Consumers retired in April 2016, and $6 million associated with a 2016 voluntary separation plan. Additionally, postretirement benefit costs decreased $8 million, comprising a $15 million reduction associated with the early adoption of a new accounting standard, offset partially by

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$7 million of cost increases. For additional details on the implementation of this standard, see Note 1, New Accounting Standards.

Depreciation and Amortization: For the three months ended September 30, 2017, depreciation and amortization expense increased $9 million compared with 2016, and for the nine months ended September 30, 2017, depreciation and amortization expense increased $39 million compared with 2016. These increases were due primarily to increased plant in service.

General Taxes: For the nine months ended September 30, 2017, general taxes decreased $7 million compared with 2016. This change was due to a $10 million benefit from the settlement of a property tax appeal related to Consumers’ Zeeland plant, offset partially by a $3 million increase in property taxes.

Other Income, Net of Expenses: For the three months ended September 30, 2017, other income, net of expenses, decreased $2 million compared with 2016. This change was due to a $4 million reduction in nonoperating retirement benefit credits associated with the early adoption of a new accounting standard, offset partially by a $2 million decrease in donations in 2017. For additional details on the implementation of this standard, see Note 1, New Accounting Standards.

For the nine months ended September 30, 2017, other income, net of expenses, increased $2 million compared with 2016. This change was due to a $9 million gain on a donation of CMS Energy stock by Consumers, which was eliminated on CMS Energy’s consolidated statements of income, and a $5 million increase due primarily to lower donations in 2017. These increases were offset partially by a $12 million reduction in nonoperating retirement benefit credits associated with the early adoption of a new accounting standard. For additional details on the implementation of this standard, see Note 1, New Accounting Standards.

Interest Charges: For the nine months ended September 30, 2017, interest charges increased $5 million compared with 2016, due primarily to higher average debt levels.

Income Taxes: For the three months ended September 30, 2017, income taxes decreased $39 million compared with 2016, and for the nine months ended September 30, 2017, income taxes decreased $32 million compared with 2016. These changes were attributable primarily to lower electric utility earnings, to a $6 million decrease associated with lower non-deductible lobbying expenses, and to the $12 million impact of a reduction in Consumers’ effective state income tax rate. For further details on this reduction in Consumers’ effective state tax rate, see Note 9, Income Taxes.

Consumers Gas Utility Results of Operations

												In Millions
	Three Months Ended							Nine Months Ended
September 30	2017		2016		Change			2017		2016			Change
Net Income Available to Common Stockholders	$	5	$	3	$	2		$	101	$	102		$	(1	)
Reasons for the change
Gas deliveries and rate increases					$	2							$	8
Maintenance and other operating expenses					1								11
Depreciation and amortization					-								(15		)
General taxes					1								(3		)
Other income, net of expenses					(4		)						(6		)
Interest charges					(1		)						(2		)
Income taxes					3								6
Total change					$	2							$	(1	)

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Following is a discussion of significant changes to net income available to common stockholders.

Gas Deliveries and Rate Increases: For the three months ended September 30, 2017, gas delivery revenues increased $2 million compared with 2016. This change reflected a $4 million rate increase, and $2 million in higher sales, offset partially by a $4 million reduction in energy efficiency program revenues. Deliveries to end-use customers were 27 bcf in 2017 and 26 bcf in 2016.

For the nine months ended September 30, 2017, gas delivery revenues increased $8 million compared with 2016. This change reflected a $14 million rate increase, and a $4 million increase in other revenues, offset partially by a $10 million decrease in sales due primarily to milder winter weather. Deliveries to end-use customers were 189 bcf in 2017 and 196 bcf in 2016.

Maintenance and Other Operating Expenses: For the three months ended September 30, 2017, maintenance and other operating expenses decreased $1 million compared with 2016. This change reflected the absence, in 2017, of $4 million associated with a voluntary separation plan in 2016, a $4 million decrease in energy efficiency program costs, and a $2 million decrease in postretirement benefit costs, comprising a $4 million reduction associated with the early adoption of a new accounting standard, offset partially by $2 million of cost increases. For additional details on the implementation of this standard, see Note 1, New Accounting Standards. These decreases were offset largely by a $4 million increase in pipeline integrity expenses and $5 million in higher gas distribution and customer operations expense.

For the nine months ended September 30, 2017, maintenance and other operating expenses decreased $11 million compared with 2016. This change reflected a $6 million decrease in postretirement benefit costs, comprising an $11 million reduction associated with the early adoption of a new accounting standard, offset partially by $5 million of cost increases. For additional details on the implementation of this standard, see Note 1, New Accounting Standards. Also contributing to the change was the absence, in 2017, of $4 million associated with a 2016 voluntary separation plan, and a $3 million decline in uncollectible accounts expense. These reductions were offset partially by a $2 million increase in other gas operating and maintenance expenses.

Depreciation and Amortization: For the nine months ended September 30, 2017, depreciation and amortization expense increased $15 million compared with 2016, due primarily to increased plant in service.

Other Income, Net of Expenses: For the three months ended September 30, 2017, other income, net of expenses, decreased $4 million compared with 2016. This change was due to a $3 million reduction in nonoperating retirement benefit credits associated with the early adoption of a new accounting standard and a $1 million increase in other expenses. For additional details on the implementation of this standard, see Note 1, New Accounting Standards.

For the nine months ended September 30, 2017, other income, net of expenses, decreased $6 million compared with 2016. This change was due to an $8 million reduction in nonoperating retirement benefit credits associated with the early adoption of a new accounting standard and a $3 million decrease in other income, net of expenses. For additional details on the implementation of this standard, see Note 1, New Accounting Standards. These reductions were offset partially by a $5 million gain on a donation of CMS Energy stock by Consumers, which was eliminated on CMS Energy’s consolidated statements of income.

Income Taxes: For the three months ended September 30, 2017, income taxes decreased $3 million compared with 2016 and for the nine months ended September 30, 2017, income taxes decreased $6 million compared with 2016. These changes were attributable primarily to lower gas utility earnings and to the $4 million impact of a reduction in Consumers’ effective state income tax rate. For further details on this reduction in Consumers’ effective state tax rate, see Note 9, Income Taxes.

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Enterprises Results of Operations

									In Millions
	Three Months Ended						Nine Months Ended
September 30	2017		2016		Change		2017		2016		Change
Net Income Available to Common Stockholders	$	8	$	8	$	-	$	27	$	17	$	10

For the nine months ended September 30, 2017, net income of the enterprises segment increased $10 million compared with 2016, due primarily to higher prices for capacity and demand revenue at DIG.

Corporate Interest and Other Results of Operations

													In Millions
	Three Months Ended									Nine Months Ended
September 30	2017			2016			Change			2017			2016			Change
Net Income (Loss) Available to Common Stockholders	$	(17	)	$	(16	)	$	(1	)	$	(59	)	$	(40	)	$	(19	)

For the nine months ended September 30, 2017, corporate interest and other net expenses increased $19 million compared with 2016, due primarily to the absence, in 2017, of a settlement reached with the Michigan Department of Treasury that resulted in a $2 million after-tax reduction in general taxes and a $3 million reduction in income tax expense. Also contributing to the increase were $4 million of higher administrative and other corporate expenses, and $1 million of lower net earnings at EnerBank. For the nine months ended September 30, 2017, corporate interest and other net expenses also reflected the elimination in consolidation of a $9 million after-tax intercompany gain resulting from the donation of CMS Energy stock by Consumers.

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CASH POSITION, INVESTING, AND FINANCING

At September 30, 2017, CMS Energy had $173 million of consolidated cash and cash equivalents, which included $31 million of restricted cash and cash equivalents. At September 30, 2017, Consumers had $85 million of consolidated cash and cash equivalents, which included $30 million of restricted cash and cash equivalents. For additional details, see Note 11, Cash and Cash Equivalents.

Operating Activities

Presented in the following table are specific components of net cash provided by operating activities for the nine months ended September 30, 2017 and 2016:

							In Millions
Nine Months Ended September 30	2017			2016			Change
CMS Energy, including Consumers
Net income	$	464		$	475		$	(11	)
Non-cash transactions1	928			870			58
Changes in core working capital2	18			62			(44		)
Postretirement benefits contributions	(9		)	(6		)	(3		)
Changes in other assets and liabilities, net	(202		)	(160		)	(42		)
Net cash provided by operating activities	$	1,199		$	1,241		$	(42	)
Consumers
Net income	$	496		$	499		$	(3	)
Non-cash transactions1	921			857			64
Changes in core working capital2	13			76			(63		)
Postretirement benefits contributions	(6		)	(4		)	(2		)
Changes in other assets and liabilities, net	(215		)	(140		)	(75		)
Net cash provided by operating activities	$	1,209		$	1,288		$	(79	)

1Non-cash transactions comprise depreciation and amortization, changes in deferred income taxes, and other non-cash operating activities and reconciling adjustments.

2Core working capital comprises accounts receivable, notes receivable, accrued revenue, inventories, accounts payable, and accrued rate refunds.

For the nine months ended September 30, 2017, net cash provided by operating activities at CMS Energy decreased $42 million compared with 2016 and net cash provided by operating activities at Consumers decreased $79 million compared with 2016. At both CMS Energy and Consumers, the decrease was due primarily to gas purchases at higher prices, increased spending on environmental remediation activities, and lower gas sales as a result of milder weather, offset partially by higher collections from customers. The change at Consumers also reflected the absence, in 2017, of a reimbursement received from CMS Energy in 2016 for a prior-year postretirement benefits contribution.

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Investing Activities

Presented in the following table are specific components of net cash used in investing activities for the nine months ended September 30, 2017 and 2016:

							In Millions
Nine Months Ended September 30	2017			2016			Change
CMS Energy, including Consumers
Capital expenditures	$	(1,208	)	$	(1,224	)	$	16
Increase in EnerBank notes receivable	(87		)	(87		)	-
Proceeds from the sale of EnerBank notes receivable	19			-			19
Costs to retire property and other investing activities	(78		)	(87		)	9
Net cash used in investing activities	$	(1,354	)	$	(1,398	)	$	44
Consumers
Capital expenditures	$	(1,196	)	$	(1,214	)	$	18
Costs to retire property and other investing activities	(82		)	(87		)	5
Net cash used in investing activities	$	(1,278	)	$	(1,301	)	$	23

For the nine months ended September 30, 2017, net cash used in investing activities at CMS Energy decreased $44 million compared with 2016 and net cash used in investing activities at Consumers decreased $23 million compared with 2016. These changes were due primarily to lower capital expenditures at Consumers. The change at CMS Energy also reflected proceeds from the sale of EnerBank notes receivable in 2017.

Financing Activities

Presented in the following table are specific components of net cash provided by (used in) financing activities for the nine months ended September 30, 2017 and 2016:

							In Millions
Nine Months Ended September 30	2017			2016			Change
CMS Energy, including Consumers
Issuance of debt	$	1,108		$	775		$	333
Issuance of common stock	80			69			11
Net increase in EnerBank certificates of deposit	40			64			(24		)
Payment of dividends on common and preferred stock	(282		)	(260		)	(22		)
Retirement of debt	(668		)	(215		)	(453		)
Decrease in notes payable	(168		)	(174		)	6
Payment of capital leases and other financing activities	(39		)	(22		)	(17		)
Net cash provided by financing activities	$	71		$	237		$	(166	)
Consumers
Issuance of debt	$	534		$	446		$	88
Stockholder contribution from CMS Energy		450			275			175
Payment of dividends on common and preferred stock		(348	)		(362	)		14
Retirement of debt		(443	)		(185	)		(258	)
Decrease in notes payable		(168	)		(174	)		6
Payment of capital leases and other financing activities	(23		)	(8		)	(15		)
Net cash provided by (used in) financing activities	$	2		$	(8	)	$	10

For the nine months ended September 30, 2017, net cash provided by financing activities at CMS Energy decreased $166 million compared with 2016 and net cash provided by financing activities at Consumers increased $10 million compared with 2016. These changes reflected higher debt retirements offset

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partially by higher debt issuances. At Consumers, the increase was due primarily to a larger stockholder contribution from CMS Energy.

CAPITAL RESOURCES AND LIQUIDITY

CMS Energy uses dividends and tax-sharing payments from its subsidiaries and external financing and capital transactions to invest in its utility and non-utility businesses, retire debt, pay dividends, and fund its other obligations. The ability of CMS Energy’s subsidiaries, including Consumers, to pay dividends to CMS Energy depends upon each subsidiary’s revenues, earnings, cash needs, and other factors. In addition, Consumers’ ability to pay dividends is restricted by certain terms included in its debt covenants and articles of incorporation and potentially by FERC requirements and provisions under the Federal Power Act and the Natural Gas Act. For additional details on Consumers’ dividend restrictions, see Note 4, Financings and Capitalization—Dividend Restrictions. For the nine months ended September 30, 2017, Consumers paid $347 million in dividends on its common stock to CMS Energy.

As a result of federal tax legislation passed in 2015 that extends bonus depreciation, CMS Energy expects to be able to extend the use of federal net operating loss carryforwards and, accordingly, defer its federal income tax payments through 2020. As a consequence, however, CMS Energy expects to receive lower tax-sharing payments from Consumers during that period. This may require CMS Energy to maintain higher levels of debt in order to invest in its businesses, pay dividends, and fund its general obligations. Despite this, CMS Energy does not anticipate a need for a block equity offering.

In March 2017, CMS Energy entered into an updated continuous equity offering program. Under this program, CMS Energy may sell, from time to time in “at the market” offerings, common stock having an aggregate sales price of up to $100 million. In June 2017, CMS Energy issued common stock under this program and received net proceeds of $70 million.

Consumers uses cash flows generated from operations and external financing transactions, as well as stockholder contributions from CMS Energy, to fund capital expenditures, retire debt, pay dividends, contribute to its employee benefit plans, and fund its other obligations. Accelerated pension funding in prior years and several initiatives to reduce costs have helped improve cash flows from operating activities. Consumers anticipates continued strong cash flows from operating activities for the remainder of 2017 and beyond.

Access to the financial and capital markets depends on CMS Energy’s and Consumers’ credit ratings and on market conditions. As evidenced by past financing transactions, CMS Energy and Consumers have had ready access to these markets. Barring major market dislocations or disruptions, CMS Energy and Consumers expect to continue to have ready access to the financial and capital markets. If access to these markets were to diminish or otherwise become restricted, CMS Energy and Consumers would implement contingency plans to address debt maturities, which could include reduced capital spending.

At September 30, 2017, CMS Energy had $549 million of its secured revolving credit facility available and Consumers had $893 million available. CMS Energy and Consumers use these credit facilities for general working capital purposes and to issue letters of credit. An additional source of liquidity is Consumers’ commercial paper program, which allows Consumers to issue, in one or more placements, up to $500 million in the aggregate in commercial paper notes with maturities of up to 365 days and that bear interest at fixed or floating rates. These issuances are supported by Consumers’ revolving credit facilities. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity. At September 30, 2017, $230 million of commercial paper notes were outstanding under this program. For additional details on CMS Energy’s and Consumers’ secured revolving credit facilities and commercial paper program, see Note 4, Financings and Capitalization.

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Certain of CMS Energy’s and Consumers’ credit agreements, debt indentures, and other facilities contain covenants that require CMS Energy and Consumers to maintain certain financial ratios, as defined therein. At September 30, 2017, no default had occurred with respect to any financial covenants contained in CMS Energy’s and Consumers’ credit agreements, debt indentures, or other facilities. CMS Energy and Consumers were each in compliance with these covenants as of September 30, 2017, as presented in the following table:

	September 30, 2017
Credit Agreement, Indenture, or Facility	Limit	Actual
CMS Energy, parent only
Debt to EBITDA1	< 6.0 to 1.0	4.4 to 1.0
Consumers
Debt to Capital2	< 0.65 to 1.0	0.47 to 1.0

1Applies to CMS Energy’s $550 million revolving and $180 million term loan credit agreements.

2Applies to Consumers’ $650 million and $250 million revolving credit agreements and its $68 million, $35 million, and $30 million reimbursement agreements.

Components of CMS Energy’s and Consumers’ cash management plan include controlling operating expenses and capital expenditures and evaluating market conditions for financing and refinancing opportunities. CMS Energy’s and Consumers’ present level of cash and expected cash flows from operating activities, together with access to sources of liquidity, are anticipated to be sufficient to fund the companies’ contractual obligations for 2017 and beyond.

Off-Balance-Sheet Arrangements

CMS Energy, Consumers, and certain of their subsidiaries enter into various arrangements in the normal course of business to facilitate commercial transactions with third parties. These arrangements include indemnities, surety bonds, letters of credit, and financial and performance guarantees. Indemnities are usually agreements to reimburse a counterparty that may incur losses due to outside claims or breach of contract terms. The maximum payment that could be required under a number of these indemnity obligations is not estimable; the maximum obligation under indemnities for which such amounts were estimable was $153 million at September 30, 2017. While CMS Energy and Consumers believe it is unlikely that they will incur any material losses related to indemnities they have not recorded as liabilities, they cannot predict the impact of these contingent obligations on their liquidity and financial condition. For additional details on these and other guarantee arrangements, see Note 3, Contingencies and Commitments—Guarantees.

OUTLOOK

Several business trends and uncertainties may affect CMS Energy’s and Consumers’ financial condition and results of operations. These trends and uncertainties could have a material impact on CMS Energy’s and Consumers’ consolidated income, cash flows, or financial position. For additional details regarding these and other uncertainties, see Forward-Looking Statements and Information; Note 2, Regulatory Matters; Note 3, Contingencies and Commitments; and Part II—Item 1A. Risk Factors.

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Consumers Electric Utility and Gas Utility Outlook and Uncertainties

Energy Waste Reduction Plan: The 2016 Energy Law, which became effective in April 2017, expands the existing energy optimization program to include demand response programs, calling the combined initiatives energy waste reduction. The 2016 Energy Law:

·extends the requirement to achieve annual reductions of 1.0 percent in customers’ electricity use through 2021 and 0.75 percent in customers’ natural gas use indefinitely

·removes limits on investments under the program and provides for a higher return on those investments; together, these provisions effectively double the financial incentives Consumers may earn for exceeding the statutory targets

·establishes a goal of 35 percent combined renewable energy and energy waste reduction by 2025

Under its existing energy optimization plan, Consumers provides its customers with incentives to reduce usage by offering energy audits, rebates and discounts on purchases of highly efficient appliances, and other incentives and programs. In March 2017, Consumers filed applications with the MPSC for approval of an energy waste reduction plan that would amend and expand its existing energy optimization plan and allow for recovery of increased investments to meet the requirements of the 2016 Energy Law. In July and August 2017, the MPSC issued orders that approved the amendments to Consumers’ 2017 energy optimization plan, authorizing Consumers to increase investments during the year and expanding the financial incentive that it may earn for exceeding savings targets during the year.

Smart Energy and Gas AMR: Consumers expects to complete the full-scale deployment of smart meters by the end of 2017, with a total of 1.8 million smart meters installed throughout its service territory. Smart meters allow customers to monitor and manage their energy usage, which Consumers expects will help reduce demand during critical peak times, resulting in lower peak electric capacity requirements. In addition, Consumers is able to disconnect and reconnect service, read, and bill from smart meters remotely. Consumers will continue to add further functionality to its smart meters. In areas where Consumers provides both electricity and natural gas to customers, it is also installing communication modules on gas meters, allowing it to read and bill from gas meters remotely. Consumers expects that it will have installed 660,000 communication modules by the end of 2017.

In areas where it provides only natural gas to customers, Consumers began the deployment of Gas AMR technology in 2017 and expects to complete it in 2019. Under this program, Consumers plans to install communication modules on 1.1 million gas meters, allowing it to conduct drive-by meter reading. As of September 30, 2017, Consumers had installed 16,000 communication modules.

Consumers Electric Utility Outlook and Uncertainties

Energy Resource Planning: Consumers continues to experience increasing demand for electricity due to Michigan’s growing economy and increased use of air conditioning, consumer electronics, and other electric devices, offset partially by the predicted effects of energy efficiency and conservation.

In April 2016, Consumers retired seven of its coal-fueled electric generating units, representing 950 MW of capacity. Even with the retirements of these units, Consumers expects to meet the capacity requirements of its full-service customers through:

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·energy waste reduction

·expanded use of renewable energy

·the use of the Jackson plant, a 540-MW natural gas-fueled electric generating plant purchased in 2015

·construction or purchase of electric generating units

·continued operation or upgrade of existing units, including upgrades at Ludington

·renegotiations of existing PPAs

·purchases of short-term market capacity

Additionally, in May 2017, Consumers reached an agreement with T.E.S. Filer City to amend their PPA in anticipation of the conversion of T.E.S. Filer City’s plant to use natural gas as its primary fuel instead of coal. The conversion is expected to increase the amount of capacity and energy produced by the plant from 73 MW to 225 MW. Under the amendment to the PPA, Consumers will purchase the increased capacity and electricity generated by the converted facility for 15 years. The original PPA was set to expire in 2025. The amendment is contingent on approval by the MPSC, on a finding by FERC that sales made under the amended PPA are exempt from, or authorized under, Section 205 of the Federal Power Act, and on commercial operation of the converted facility on or before June 1, 2022.

During 2017, Consumers issued a request for proposals to acquire a natural gas-fueled generating plant, and it completed an auction to purchase generation capacity. The request for proposals and the contracts entered into as a result of the auction were contingent on the anticipated early termination of Consumers’ PPA with Entergy, under which Consumers purchases virtually all of the capacity and energy produced by Palisades. Following the MPSC’s September 2017 order authorizing only partial recovery of the termination payment that Consumers had negotiated with Entergy, Consumers and Entergy agreed not to terminate the PPA, which is now expected to continue until April 2022 under its original terms. As a result, Consumers has rescinded the capacity contracts and is presently assessing whether to pursue any of the proposals received to acquire a natural gas-fueled generating plant. For additional details regarding the MPSC’s order on the Palisades PPA, see the Electric Rate Matters discussion in this section.

Renewable Energy Plan: The 2016 Energy Law raises the renewable energy standard from the present ten-percent requirement to 15 percent in 2021, with an interim target of 12.5 percent in 2019. Consumers is required to submit RECs, which represent proof that the associated electricity was generated from a renewable energy resource, in an amount equal to at least the required percentage of Consumers’ electric sales volume each year. Under its renewable energy plan, Consumers expects to meet its renewable energy requirement each year with a combination of newly generated RECs and previously generated RECs carried over from prior years.

In conjunction with its renewable energy plan, Consumers signed a 15-year agreement in 2015 to purchase renewable capacity, energy, and RECs from a 100-MW wind park to be constructed in Huron County, Michigan. The wind park is expected to be operational by the end of 2017. In addition, Consumers has obtained the MPSC’s approval to construct two additional phases at its Cross Winds® Energy Park. Phase II of the park, with a nameplate capacity of 44 MW, is expected to be operational in early 2018, while Phase III, with a nameplate capacity of 76 MW, is expected to be operational in 2020. Consumers began construction of Phase II in June 2017. Both phases of the project are expected to qualify for certain federal production tax credits, which are expected to generate cost savings that will be passed on to customers.

In June 2017, Consumers issued requests for proposals to acquire wind and solar generation projects within MISO’s service territory, specifically wind generation projects ranging in size from 100 MW to 200 MW and solar generation projects at least 10 MW in size. In September 2017, Consumers filed amendments to its renewable energy plan with the MPSC, requesting approval to acquire up to 525 MW of new wind generation projects and up to 100 MW of new solar generation projects in order to meet its

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renewable energy requirement. Any contracts entered into as a result of the request for proposals would be subject to MPSC approval.

Voluntary Large Customer Renewable Energy Pilot Program: In May 2017, Consumers filed an application with the MPSC proposing a pilot program that would provide large full-service electric customers with the opportunity to advance the development of renewable energy beyond the requirements of the 2016 Energy Law. Under the pilot program, customers would have the ability to match up to 100 percent of their energy use with renewable energy generated from wind resources. In August 2017, the MPSC conditionally approved a portion of the pilot program and instructed Consumers to submit the program for review as a voluntary green pricing program under provisions of the 2016 Energy Law.

Electric Customer Deliveries and Revenue: Consumers’ electric customer deliveries are largely dependent on Michigan’s economy. Consumers expects weather-adjusted electric deliveries to increase in 2017 by about one-half percent compared with 2016.

Over the next five years, Consumers plans conservatively for average electric delivery growth of about one-half percent annually. This increase reflects growth in electric demand, offset partially by the predicted effects of energy waste reduction programs and appliance efficiency standards. Actual delivery levels will depend on:

·energy conservation measures and results of energy waste reduction programs

·weather fluctuations

·Michigan’s economic conditions, including utilization, expansion, or contraction of manufacturing facilities, population trends, and housing activity

Electric ROA: Under existing Michigan law, electric customers in Consumers’ service territory are allowed to buy electric generation service from alternative electric suppliers in an aggregate amount up to ten percent of Consumers’ weather-adjusted retail sales for the preceding calendar year. At September 30, 2017, electric deliveries under the ROA program were at the ten-percent limit. Of Consumers’ 1.8 million electric customers, 300 customers, or 0.02 percent, purchased electric generation service under the ROA program.

The 2016 Energy Law, which became effective in April 2017, retains the ten percent cap on ROA, with certain exceptions, but establishes a path to ensure that forward capacity is secured for all electric customers in Michigan, including customers served by alternative electric suppliers under ROA. The new law also authorizes the MPSC to ensure that alternative electric suppliers have procured enough capacity to cover their anticipated capacity requirements for the four-year forward period. To this end, the MPSC issued an order in March 2017, directing Consumers to file an application to implement a state reliability mechanism. Under the mechanism proposed by the MPSC, if an alternative electric supplier did not demonstrate that it had procured its capacity requirements for the four-year forward period, ROA customers could pay a charge to the utility for capacity that is not provided by the alternative electric supplier. Consumers filed its application in April 2017.

Electric Rate Matters: Rate matters are critical to Consumers’ electric utility business. For additional details on rate matters, see Note 2, Regulatory Matters.

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Electric Rate Case: In March 2017, Consumers filed an application with the MPSC seeking an annual rate increase of $173 million, based on a 10.5 percent authorized return on equity. The filing requested authority to recover new investment in system reliability, environmental compliance, and technology enhancements. In September 2017, Consumers reduced its requested annual rate increase to $148 million. Presented in the following table are the components of the requested increase in revenue:

	In Millions
Components of the rate increase
Investment in rate base	$	45
Operating and maintenance costs	42
Gross margin	42
Cost of capital	28
Working capital	(9)
Total	$	148

In October 2017, Consumers self-implemented an annual rate increase of $130 million, subject to refund with interest and potential penalties.

Palisades PPA: In December 2016, Consumers agreed to pay Entergy $172 million to terminate their PPA in May 2018, four years ahead of schedule, contingent on the MPSC’s approval of Consumers’ recovery of the payment in electric rates. Under the PPA, Consumers purchases virtually all of the capacity and energy produced by Palisades, up to the annual average capacity of 798 MW. In February 2017, Consumers requested authorization to recover the termination payment through securitization. In September 2017, the MPSC issued a securitization financing order authorizing Consumers to recover only $137 million of the $172 million termination payment. As a result, Consumers and Entergy agreed not to terminate the PPA, which is now expected to continue until April 2022 under its original terms.

Depreciation Rate Case: In November 2016, Consumers filed a depreciation rate case related to its Ludington electric utility property, requesting to increase depreciation expense by $15 million annually. In July 2017, the MPSC approved a settlement agreement authorizing Consumers to recover an increase in depreciation expense of $2 million annually, based on December 31, 2015 balances. The new depreciation rates will go into effect with a final order in Consumers’ next electric rate case following the electric rate case filed in 2017.

Sale of Coal-Fueled Generating Units: In October 2017, Consumers completed the sale of its retired B.C. Cobb and J.R. Whiting coal-fueled electric generating units to Forsite. Under the terms of the agreement, which the MPSC approved in September 2017, Consumers transferred the generating units and associated land to Forsite and agreed to pay $63 million to decommission the units and perform cleanup activities at the sites. Consumers securitized the generating units in 2014; thus, the carrying value of the assets was zero. Upon the closing of the sale, Consumers recorded a liability of $63 million with an offsetting reduction to its cost of removal regulatory liability. Additionally, Consumers removed from its consolidated balance sheets a $16 million ARO related to asbestos removal. Consumers estimates that this divestiture will save its electric customers $30 million in decommissioning costs.

Electric Environmental Outlook: Consumers’ operations are subject to various state and federal environmental laws and regulations. Consumers estimates that it will incur capital expenditures of $0.5 billion from 2017 through 2021 to continue to comply with the Clean Air Act, Clean Water Act, and numerous state and federal environmental regulations. Consumers expects to recover these costs in customer rates, but cannot guarantee this result. Consumers’ primary environmental compliance focus includes, but is not limited to, the following matters.

Air Quality: CSAPR, which became effective in 2015, requires Michigan and 27 other states to improve air quality by reducing power plant emissions that, according to EPA computer models, contribute to

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ground-level ozone and fine particle pollution in other downwind states. In September 2016, the EPA finalized new ozone season standards for CSAPR, which became effective in May 2017. CSAPR is presently being litigated; however, any decision will not impact Consumers’ compliance strategy, as Consumers expects its emissions to be within the CSAPR allowance allocations.

In 2012, the EPA published emission standards for electric generating units, based on Section 112 of the Clean Air Act, calling the final rule MATS. Under MATS, all of Consumers’ existing coal-fueled electric generating units were required to add additional controls for hazardous air pollutants. Consumers met the extended deadline of April 2016 for five coal-fueled units and two oil/gas-fueled units it continues to operate and retired its seven remaining coal-fueled units. MATS is presently being litigated, but any decision is not expected to impact Consumers’ MATS compliance strategy. In addition, Consumers must comply with the Michigan Mercury Rule and with its settlement agreement with the EPA entered into in 2014 concerning opacity and NSR.

In 2015, the EPA released its new rule to lower the NAAQS for ozone. The new ozone NAAQS will make it more difficult to construct or modify power plants in many areas of the country, including some parts of Michigan, if the areas are designated to be in nonattainment of the new standard. The NAAQS for ozone are presently being litigated and the EPA’s decision on nonattainment areas is expected by the end of 2017. Consumers is monitoring the designation process of this rule, as well as the litigation, but does not anticipate any impact on its electric generating units.

Consumers’ strategy to comply with air quality regulations, including CSAPR, NAAQS, and MATS, involved the installation of emission control equipment at some facilities and the suspension of operations at others; however, Consumers continues to evaluate these rules in conjunction with other EPA rulemakings, litigation, and congressional action. This evaluation could result in:

·a change in Consumers’ fuel mix

·changes in the types of generating units Consumers may purchase or build in the future

·changes in how certain units are used

·the retirement, mothballing, or repowering with an alternative fuel of some of Consumers’ generating units

·changes in Consumers’ environmental compliance costs

Greenhouse Gases: There have been numerous legislative and regulatory initiatives at the state, regional, national, and international levels that involve the potential regulation of greenhouse gases. Consumers continues to monitor and comment on these initiatives and to follow litigation involving greenhouse gases.

In 2015, the EPA finalized new rules pursuant to Section 111(b) of the Clean Air Act to limit carbon dioxide emissions from new electric generating units. New coal-fueled units will not be able to meet this limit without installing carbon dioxide control equipment using such methods as carbon capture and sequestration. In addition, the EPA finalized new rules pursuant to Section 111(b) of the Clean Air Act to limit carbon dioxide emissions from modified or reconstructed electric generating units. Both of these rules are being litigated.

Also in 2015, the EPA published final rules pursuant to Section 111(d) of the Clean Air Act to limit carbon dioxide emissions from existing electric generating units, calling the rules the “Clean Power Plan.” The rules required a 32-percent nationwide reduction in carbon emissions from existing power plants by 2030 (based on 2005 levels), and states choosing not to develop their own implementation plans would be subject to the federal plan. Certain states, corporations, and industry groups initiated litigation opposing the proposed Clean Power Plan, and in 2016, the U.S. Supreme Court stayed the Clean Power Plan while the litigation proceeded. In March 2017, the Trump administration issued an executive order directing the EPA and other federal agencies to review rules and policies that burden domestic energy production, including the Clean Power Plan. The EPA subsequently filed motions to hold the Section 111(b) and

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Clean Power Plan litigation in abeyance while it reconsiders the rule. In October 2017, the EPA published a proposal to repeal the Clean Power Plan, with a public comment period through mid-December 2017. The EPA has also announced that it intends to begin the rulemaking process for a replacement rule that conforms to the new legal interpretation set forth in the published proposed repeal of the Clean Power Plan. It is expected that the EPA will propose a replacement rule in 2018. Consumers does not expect that any changes to the Clean Power Plan will have an adverse impact on its environmental strategy.

In 2015, a group of 195 countries finalized the Paris Agreement, which governs carbon dioxide reduction measures beginning in 2020. As part of this agreement, the United States pledged a 26-percent reduction in greenhouse gas emissions by 2025 (with aspirations to achieve a 28-percent reduction) compared with 2005 levels. These non-binding targets are in line with the now-stayed Clean Power Plan targets. The Trump administration has withdrawn from the Paris Agreement, but also stated a desire to renegotiate a new agreement in the future. Consumers does not expect any adverse changes to its environmental strategy as a result of these events.

While Consumers cannot predict the outcome of changes in policy under the Trump administration or of other legislative or regulatory initiatives involving the potential regulation of greenhouse gases, it intends to continue to move forward with its clean energy plan, its present carbon reduction target, and its emphasis on supply diversity. Consumers will continue to monitor regulatory activity regarding greenhouse gas emissions standards that may affect electric generating units.

Litigation, as well as federal laws, EPA regulations regarding greenhouse gases, or similar treaties, state laws, or rules, if enacted or ratified, could ultimately require Consumers to replace equipment, install additional emission control equipment, purchase emission allowances, curtail operations, arrange for alternative sources of supply, or take other steps to manage or lower the emission of greenhouse gases. Although associated capital or operating costs relating to greenhouse gas regulation or legislation could be material and cost recovery cannot be assured, Consumers expects to recover these costs and capital expenditures in rates consistent with the recovery of other reasonable costs of complying with environmental laws and regulations.

CCRs: In 2015, the EPA published a final rule regulating CCRs, such as coal ash, under RCRA. The final rule adopts minimum standards for beneficially reusing and disposing of non-hazardous CCRs. The rule establishes new minimum requirements for site location, groundwater monitoring, flood protection, storm water design, fugitive dust control, and public disclosure of information. The rule also sets out conditions under which CCR units would be forced to cease receiving CCR and non-CCR waste and initiate closure based on the inability to achieve minimum safety standards, meet a location standard, or meet minimum groundwater standards. Consumers continues to develop work plans for submission to the MDEQ for concurrence to ensure coordination between federal and state requirements. Furthermore, Congress passed legislation in December 2016 that allows states to develop a permitting program for CCR under RCRA, and Michigan is taking steps to adopt such a program. As a result, Consumers may need to adjust its recorded ARO associated with coal ash disposal sites depending on the outcome of its submissions to the MDEQ and on a future RCRA permitting program under MDEQ, if the EPA approves a state-level program. Consumers has historically been authorized to recover in electric rates costs incurred related to cleanup and closure of coal ash disposal sites.

Water: The EPA’s rule to regulate existing electric generating plant cooling water intake systems under Section 316(b) of the Clean Water Act became effective in 2014. The rule is aimed at reducing alleged harmful impacts on fish and shellfish. In 2015, the EPA released its final effluent limitation guidelines, which set stringent new requirements for the discharge from electric generating units into wastewater streams. In April 2017, the EPA announced a decision to reconsider the final effluent limitation guidelines, which are being litigated, and administratively stayed and delayed the compliance dates for two years. In August 2017, the EPA announced that it will undertake a rulemaking to replace specific portions of the rule. Consumers does not expect any adverse changes to its environmental strategy as a result of any revisions to the rule.

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In June 2015, the EPA and the U.S. Army Corps of Engineers published a final rule redefining “waters of the United States,” which designates the EPA’s jurisdiction under the Clean Water Act. Numerous states and other interested parties, including Michigan’s Attorney General, have filed suits in federal courts to block the rule, which was stayed in October 2015. The Trump administration issued an executive order in February 2017 directing the EPA and the U.S. Army Corps of Engineers to re-examine the “waters of the United States” rule. In June 2017, the EPA and the U.S. Army Corps of Engineers indicated that they intend to rescind the rule and revert to regulatory language that had been in effect prior to the June 2015 final rule. Consumers does not expect any adverse changes to its environmental strategy as a result of these events.

Many of Consumers’ facilities maintain NPDES permits, which are valid for five years and vital to the facilities’ operations. Failure of the MDEQ to renew any NPDES permit, a successful appeal against a permit, or onerous terms contained in a permit could have a significant detrimental effect on the operations of a facility.

PCBs: In 2010, the EPA issued an Advance Notice of Proposed Rulemaking, indicating that it is considering a variety of regulatory actions with respect to PCBs. The timing of any future rulemaking is uncertain as the Trump administration has not indicated that a PCB rulemaking is a priority. Additionally, the proposed rulemaking is no longer on the federal rulemaking agenda.

Environmental Stewardship: In an effort to reduce Consumers’ environmental footprint and the impact of present and future regulations, Consumers has adopted the following voluntary environmental stewardship goals for air emissions, water use, and waste reduction:

·Committed to a 20-percent reduction of carbon dioxide emissions intensity (pounds of carbon dioxide per MWh generated) by 2025 from a 2008 baseline. In 2016, Consumers achieved a reduction in total tons of carbon dioxide emitted of over 30 percent compared to 2008.

·Committed to a 20-percent reduction in water usage (gallons per MWh generated) by 2020, and expects to meet that goal by the end of 2018.

·Committed to a cumulative waste reduction goal of one million cubic yards of landfill space avoided by 2019, and met that goal in 2017.

Other Matters: Other electric environmental matters could have a material impact on Consumers’ outlook. For additional details on other electric environmental matters, see Note 3, Contingencies and Commitments—Consumers Electric Utility Contingencies—Electric Environmental Matters.

Consumers Gas Utility Outlook and Uncertainties

Gas Deliveries: Consumers expects weather-adjusted gas deliveries in 2017 and over the next five years to remain stable relative to 2016. This outlook reflects modest growth in gas demand offset by the predicted effects of energy efficiency and conservation. Actual delivery levels from year to year may vary from this expectation due to:

·weather fluctuations

·use by power producers

·availability and development of renewable energy sources

·gas price changes

·Michigan economic conditions, including population trends and housing activity

·the price of competing energy sources or fuels

·energy efficiency and conservation impacts

Gas Rate Matters: Rate matters are critical to Consumers’ gas utility business. For additional details on rate matters, see Note 2, Regulatory Matters.

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Gas Transmission: In September 2016, Consumers filed an application with the MPSC to invest $610 million in the construction of a 95-mile, 24-inch-diameter natural gas pipeline in Saginaw, Genesee, and Oakland Counties, Michigan. The MPSC issued an order in March 2017 authorizing Consumers to construct and operate the pipeline. Consumers expects the pipeline to be operational by the end of 2020.

Gas Environmental Outlook: Consumers expects to incur response activity costs at a number of sites, including 23 former MGP sites. For additional details, see Note 3, Contingencies and Commitments—Consumers Gas Utility Contingencies—Gas Environmental Matters.

Enterprises Outlook and Uncertainties

The primary focus with respect to CMS Energy’s non-utility businesses is to maximize the value of their generating assets, which represent 1,086 MW of capacity, and to pursue opportunities for the development of renewable generation projects.

T.E.S. Filer City plans to convert its plant to use natural gas as its primary fuel instead of coal. The conversion is expected to increase the amount of capacity and energy produced by the plant from 73 MW to 225 MW. In May 2017, in anticipation of the planned conversion, T.E.S. Filer City reached an agreement with Consumers to amend their PPA. Under the amendment to the PPA, Consumers will purchase the increased capacity and electricity generated by the converted facility for 15 years. The original PPA was set to expire in 2025. The amendment is contingent on approval by the MPSC, on a finding by FERC that sales made under the amended PPA are exempt from, or authorized under, Section 205 of the Federal Power Act, and on commercial operation of the converted facility on or before June 1, 2022.

In May 2017, CMS Enterprises completed the construction and began operations of a 2.5-MW solar generation facility in Phillips, Wisconsin. Energy produced by the solar generation facility is sold through a 25-year PPA to Dairyland Power Cooperative, a non-affiliated company.

In September 2017, CMS Enterprises purchased a 24-MW solar generation project in Delta Township, Michigan. The project is presently under development and will be completed in two phases in 2018. Energy produced by the solar generation project will be sold under a 25-year PPA to Lansing Board of Water and Light, a non-affiliated company.

Trends, uncertainties, and other matters that could have a material impact on CMS Energy’s consolidated income, cash flows, or financial position include:

·changes in energy and capacity prices

·changes in commodity prices and interest rates on certain derivative contracts that do not qualify for hedge accounting and must be marked to market through earnings

·changes in various environmental laws, regulations, principles, or practices, or in their interpretation

·the outcome of certain legal proceedings

·indemnity and environmental remediation obligations at Bay Harbor

·obligations related to a tax claim from the government of Equatorial Guinea

·representations, warranties, and indemnities provided by CMS Energy in connection with previous sales of assets

For additional details regarding the enterprises segment’s uncertainties, see Note 3, Contingencies and Commitments.

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Other Outlook and Uncertainties

EnerBank: EnerBank is a Utah state-chartered, FDIC-insured industrial bank providing unsecured consumer installment loans for financing home improvements. EnerBank represented four percent of CMS Energy’s net assets at September 30, 2017 and five percent of CMS Energy’s net income available to common stockholders for the nine months ended September 30, 2017. The carrying value of EnerBank’s loan portfolio was $1.3 billion at September 30, 2017. Its loan portfolio was funded primarily by certificates of deposit of $1.2 billion. The twelve-month rolling average net default rate on loans held by EnerBank was 1.2 percent at September 30, 2017. CMS Energy is required both by law and by contract to provide financial support, including infusing additional capital, to ensure that EnerBank satisfies mandated capital requirements and has sufficient liquidity to operate. With its self-funding plan, EnerBank has exceeded these requirements historically and exceeded them as of September 30, 2017.

Litigation: CMS Energy, Consumers, and certain of their subsidiaries are named as parties in various litigation matters, as well as in administrative proceedings before various courts and governmental agencies, arising in the ordinary course of business. For additional details regarding these and other legal matters, see Note 2, Regulatory Matters and Note 3, Contingencies and Commitments.

NEW ACCOUNTING STANDARDS

For details regarding new accounting standards issued but not yet effective, see Note 1, New Accounting Standards.

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CMS Energy Corporation

Consolidated Statements of Income (Unaudited)

				In Millions, Except Per Share Amounts
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Operating Revenue	$	1,527		$	1,587		$	4,805		$	4,759
Operating Expenses
Fuel for electric generation	144			145			386			367
Purchased and interchange power	426			454			1,132			1,165
Purchased power – related parties	21			22			64			65
Cost of gas sold	47			45			494			490
Maintenance and other operating expenses	304			301			909			890
Depreciation and amortization	193			183			652			597
General taxes	62			62			209			209
Total operating expenses	1,197			1,212			3,846			3,783
Operating Income	330			375			959			976
Other Income (Expense)
Interest income	3			1			10			4
Allowance for equity funds used during construction	1			3			5			9
Income from equity method investees	3			5			10			12
Nonoperating retirement benefits, net	3			11			10			31
Other income	2			2			4			7
Other expense	(2		)	(6		)	(6		)	(13		)
Total other income	10			16			33			50
Interest Charges
Interest on long-term debt	101			103			304			306
Other interest expense	10			8			26			22
Allowance for borrowed funds used during construction	-			(1		)	(2		)	(4		)
Total interest charges	111			110			328			324
Income Before Income Taxes	229			281			664			702
Income Tax Expense	57			95			200			227
Net Income	172			186			464			475
Income Attributable to Noncontrolling Interests	-			-			1			1
Net Income Available to Common Stockholders	$	172		$	186		$	463		$	474
Basic Earnings Per Average Common Share	$	0.61		$	0.67		$	1.65		$	1.71
Diluted Earnings Per Average Common Share	$	0.61		$	0.67		$	1.65		$	1.70
Dividends Declared Per Common Share	$	0.3325		$	0.3100		$	0.9975		$	0.9300

The accompanying notes are an integral part of these statements.

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CMS Energy Corporation

Consolidated Statements of Comprehensive Income (Unaudited)

			In Millions
	Three Months Ended				Nine Months Ended
September 30	2017		2016		2017		2016
Net Income	$	172	$	186	$	464	$	475
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax of $1, $-, $1, and $-	-		1		1		2
Amortization of prior service credit, net of tax of $- for all periods	-		-		-		(1		)
Investments
Unrealized gain on investments, net of tax of $-, $-, $1, and $-	1		1		2		1
Other Comprehensive Income	1		2		3		2
Comprehensive Income	173		188		467		477
Comprehensive Income Attributable to Noncontrolling Interests	-		-		1		1
Comprehensive Income Attributable to CMS Energy	$	173	$	188	$	466	$	476

The accompanying notes are an integral part of these statements.

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CMS Energy Corporation

Consolidated Statements of Cash Flows (Unaudited)

	In Millions
Nine Months Ended September 30	2017			2016
Cash Flows from Operating Activities
Net income	$	464		$	475
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	652			597
Deferred income taxes and investment tax credit	198			219
Other non-cash operating activities and reconciling adjustments	78			54
Cash provided by (used in) changes in assets and liabilities
Accounts and notes receivable and accrued revenue	185			51
Inventories	(161		)	35
Accounts payable and accrued refunds	(6		)	(24		)
Other current and non-current assets and liabilities	(211		)	(166		)
Net cash provided by operating activities	1,199			1,241
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under capital lease)	(1,208		)	(1,224		)
Increase in EnerBank notes receivable	(87		)	(87		)
Proceeds from the sale of EnerBank notes receivable	19			-
Cost to retire property and other investing activities	(78		)	(87		)
Net cash used in investing activities	(1,354		)	(1,398		)
Cash Flows from Financing Activities
Proceeds from issuance of debt	1,108			775
Issuance of common stock	80			69
Net increase in EnerBank certificates of deposit	40			64
Payment of dividends on common and preferred stock	(282		)	(260		)
Retirement of long-term debt	(668		)	(215		)
Decrease in notes payable	(168		)	(174		)
Payment of capital lease obligations and other financing costs	(39		)	(22		)
Net cash provided by financing activities	71			237
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	(84		)	80
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	257			288
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	$	173		$	368
Other non-cash investing and financing activities
Non-cash transactions
Capital expenditures not paid	$	153		$	159
Note receivable recorded for future refund of use taxes paid and capitalized	-			29

The accompanying notes are an integral part of these statements.

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CMS Energy Corporation

Consolidated Balance Sheets (Unaudited)

ASSETS
			In Millions
	September 30		December 31
	2017		2016
Current Assets
Cash and cash equivalents	$	142	$	235
Restricted cash and cash equivalents	27		19
Accounts receivable and accrued revenue, less allowance of $22 in 2017 and $24 in 2016	631		821
Notes receivable, less allowance of $19 in 2017 and $16 in 2016	197		180
Notes receivable held for sale	31		39
Accounts receivable – related parties	12		12
Inventories at average cost
Gas in underground storage	584		446
Materials and supplies	126		119
Generating plant fuel stock	77		61
Deferred property taxes	157		250
Regulatory assets	19		17
Prepayments and other current assets	118		81
Total current assets	2,121		2,280
Plant, Property, and Equipment
Plant, property, and equipment, gross	21,966		21,010
Less accumulated depreciation and amortization	6,403		6,056
Plant, property, and equipment, net	15,563		14,954
Construction work in progress	881		761
Total plant, property, and equipment	16,444		15,715
Other Non-current Assets
Regulatory assets	2,038		2,091
Accounts and notes receivable	1,177		1,118
Investments	71		65
Other	269		353
Total other non-current assets	3,555		3,627
Total Assets	$	22,120	$	21,622

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LIABILITIES AND EQUITY
				In Millions
	September 30			December 31
	2017			2016
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	$	980		$	886
Notes payable	230			398
Accounts payable	624			598
Accounts payable – related parties	8			12
Accrued rate refunds	35			21
Accrued interest	79			98
Accrued taxes	90			348
Regulatory liabilities	85			95
Other current liabilities	130			199
Total current liabilities	2,261			2,655
Non-current Liabilities
Long-term debt	9,024			8,640
Non-current portion of capital leases and financing obligation	97			110
Regulatory liabilities	2,066			2,041
Postretirement benefits	760			789
Asset retirement obligations	443			447
Deferred investment tax credit	88			73
Deferred income taxes	2,501			2,287
Other non-current liabilities	308			290
Total non-current liabilities	15,287			14,677
Commitments and Contingencies (Notes 2 and 3)
Equity
Common stockholders’ equity
Common stock, authorized 350.0 shares; outstanding 281.6 shares in 2017 and 279.2 shares in 2016	3			3
Other paid-in capital	5,013			4,916
Accumulated other comprehensive loss	(47		)	(50		)
Accumulated deficit	(434		)	(616		)
Total common stockholders’ equity	4,535			4,253
Noncontrolling interests	37			37
Total equity	4,572			4,290
Total Liabilities and Equity	$	22,120		$	21,622

The accompanying notes are an integral part of these statements.

41

CMS Energy Corporation

Consolidated Statements of Changes in Equity (Unaudited)

										In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Total Equity at Beginning of Period	$	4,486		$	4,193		$	4,290		$	3,975
Common Stock
At beginning and end of period	3			3			3			3
Other Paid-in Capital
At beginning of period	5,006			4,906			4,916			4,837
Common stock issued	7			3			95			82
Common stock repurchased	-			(1		)	(13		)	(11		)
Common stock reissued	-			-			15			-
At end of period	5,013			4,908			5,013			4,908
Accumulated Other Comprehensive Loss
At beginning of period	(48		)	(47		)	(50		)	(47		)
Retirement benefits liability
At beginning of period	(49		)	(43		)	(50		)	(43		)
Amortization of net actuarial loss	-			1			1			2
Amortization of prior service credit	-			-			-			(1		)
At end of period	(49		)	(42		)	(49		)	(42		)
Investments
At beginning of period	1			(4		)	-			(4		)
Unrealized gain on investments	1			1			2			1
At end of period	2			(3		)	2			(3		)
At end of period	(47		)	(45		)	(47		)	(45		)
Accumulated Deficit
At beginning of period	(512		)	(706		)	(616		)	(855		)
Cumulative effect of change in accounting principle	-			-			-			33
Net income attributable to CMS Energy	172			186			463			474
Dividends declared on common stock	(94		)	(87		)	(281		)	(259		)
At end of period	(434		)	(607		)	(434		)	(607		)
Noncontrolling Interests
At beginning of period	37			37			37			37
Income attributable to noncontrolling interests	-			-			1			1
Distributions and other changes in noncontrolling interests	-			-			(1		)	(1		)
At end of period	37			37			37			37
Total Equity at End of Period	$	4,572		$	4,296		$	4,572		$	4,296

The accompanying notes are an integral part of these statements.

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43

Consumers Energy Company

Consolidated Statements of Income (Unaudited)

										In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Operating Revenue	$	1,437		$	1,498		$	4,536		$	4,514
Operating Expenses
Fuel for electric generation	115			118			304			290
Purchased and interchange power	424			445			1,124			1,148
Purchased power – related parties	23			23			67			66
Cost of gas sold	42			39			479			477
Maintenance and other operating expenses	274			274			824			816
Depreciation and amortization	191			182			646			592
General taxes	60			61			203			207
Total operating expenses	1,129			1,142			3,647			3,596
Operating Income	308			356			889			918
Other Income (Expense)
Interest income	2			1			8			3
Interest and dividend income – related parties	-			-			-			1
Allowance for equity funds used during construction	1			3			5			9
Nonoperating retirement benefits, net	3			9			8			28
Other income	1			2			15			7
Other expense	(2		)	(6		)	(6		)	(13		)
Total other income	5			9			30			35
Interest Charges
Interest on long-term debt	66			65			198			195
Other interest expense	4			3			11			9
Allowance for borrowed funds used during construction	-			(1		)	(2		)	(4		)
Total interest charges	70			67			207			200
Income Before Income Taxes	243			298			712			753
Income Tax Expense	62			103			216			254
Net Income	181			195			496			499
Preferred Stock Dividends	-			-			1			1
Net Income Available to Common Stockholder	$	181		$	195		$	495		$	498

The accompanying notes are an integral part of these statements.

44

Consumers Energy Company

Consolidated Statements of Comprehensive Income (Unaudited)

									In Millions
	Three Months Ended					Nine Months Ended
September 30	2017		2016			2017			2016
Net Income	$	181	$	195		$	496		$	499
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax of $- for all periods	-		-			1			-
Investments
Unrealized gain (loss) on investments, net of tax of $-, $(1), $1, and $2	-		(2		)	2			3
Reclassification adjustments included in net income, net of tax of $-, $-, $(5), and $-	-		-			(8		)	-
Other Comprehensive Income (Loss)	-		(2		)	(5		)	3
Comprehensive Income	$	181	$	193		$	491		$	502

The accompanying notes are an integral part of these statements.

45

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46

Consumers Energy Company

Consolidated Statements of Cash Flows (Unaudited)

				In Millions
Nine Months Ended September 30	2017			2016
Cash Flows from Operating Activities
Net income	$	496		$	499
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	646			592
Deferred income taxes and investment tax credit	204			220
Other non-cash operating activities and reconciling adjustments	71			45
Cash provided by (used in) changes in assets and liabilities
Accounts and notes receivable and accrued revenue	184			72
Inventories	(161		)	35
Accounts payable and accrued refunds	(10		)	(31		)
Other current and non-current assets and liabilities	(221		)	(144		)
Net cash provided by operating activities	1,209			1,288
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under capital lease)	(1,196		)	(1,214		)
Cost to retire property and other investing activities	(82		)	(87		)
Net cash used in investing activities	(1,278		)	(1,301		)
Cash Flows from Financing Activities
Proceeds from issuance of long-term debt	534			446
Stockholder contribution	450			275
Payment of dividends on common and preferred stock	(348		)	(362		)
Retirement of long-term debt	(443		)	(185		)
Decrease in notes payable	(168		)	(174		)
Payment of capital lease obligations and other financing costs	(23		)	(8		)
Net cash provided by (used in) financing activities	2			(8		)
Net Decrease in Cash and Cash Equivalents, Including Restricted Amounts	(67		)	(21		)
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	152			71
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	$	85		$	50
Other non-cash investing and financing activities
Non-cash transactions
Capital expenditures not paid	$	140		$	145
Note receivable recorded for future refund of use taxes paid and capitalized	-			29

The accompanying notes are an integral part of these statements.

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Consumers Energy Company

Consolidated Balance Sheets (Unaudited)

ASSETS

			In Millions
	September 30		December 31
	2017		2016
Current Assets
Cash and cash equivalents	$	55	$	131
Restricted cash and cash equivalents	27		19
Accounts receivable and accrued revenue, less allowance of $22 in 2017 and $24 in 2016	612		800
Notes receivable	30		29
Accounts receivable – related parties	2		9
Inventories at average cost
Gas in underground storage	584		446
Materials and supplies	121		114
Generating plant fuel stock	73		57
Deferred property taxes	157		250
Regulatory assets	19		17
Prepayments and other current assets	110		70
Total current assets	1,790		1,942
Plant, Property, and Equipment
Plant, property, and equipment, gross	21,784		20,838
Less accumulated depreciation and amortization	6,335		5,994
Plant, property, and equipment, net	15,449		14,844
Construction work in progress	877		759
Total plant, property, and equipment	16,326		15,603
Other Non-current Assets
Regulatory assets	2,038		2,091
Accounts and notes receivable	45		27
Investments	21		33
Other	160		250
Total other non-current assets	2,264		2,401
Total Assets	$	20,380	$	19,946

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LIABILITIES AND EQUITY

				In Millions
	September 30			December 31
	2017			2016
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	$	464		$	397
Notes payable	230			398
Accounts payable	601			580
Accounts payable – related parties	12			18
Accrued rate refunds	35			21
Accrued interest	48			67
Accrued taxes	111			354
Regulatory liabilities	85			95
Other current liabilities	93			164
Total current liabilities	1,679			2,094
Non-current Liabilities
Long-term debt	5,275			5,253
Non-current portion of capital leases and financing obligation	97			110
Regulatory liabilities	2,066			2,041
Postretirement benefits	703			730
Asset retirement obligations	442			446
Deferred investment tax credit	88			73
Deferred income taxes	3,257			3,042
Other non-current liabilities	241			218
Total non-current liabilities	12,169			11,913
Commitments and Contingencies (Notes 2 and 3)
Equity
Common stockholder’s equity
Common stock, authorized 125.0 shares; outstanding 84.1 shares for both periods	841			841
Other paid-in capital	4,449			3,999
Accumulated other comprehensive loss	(8		)	(3		)
Retained earnings	1,213			1,065
Total common stockholder’s equity	6,495			5,902
Preferred stock	37			37
Total equity	6,532			5,939
Total Liabilities and Equity	$	20,380		$	19,946

The accompanying notes are an integral part of these statements.

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Consumers Energy Company

Consolidated Statements of Changes in Equity (Unaudited)

										In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Total Equity at Beginning of Period	$	6,462		$	5,916		$	5,939		$	5,546
Common Stock
At beginning and end of period	841			841			841			841
Other Paid-in Capital
At beginning of period	4,449			3,999			3,999			3,724
Stockholder contribution	-			-			450			275
At end of period	4,449			3,999			4,449			3,999
Accumulated Other Comprehensive Loss
At beginning of period	(8		)	(1		)	(3		)	(6		)
Retirement benefits liability
At beginning of period	(20		)	(19		)	(21		)	(19		)
Amortization of net actuarial loss	-			-			1			-
At end of period	(20		)	(19		)	(20		)	(19		)
Investments
At beginning of period	12			18			18			13
Unrealized gain (loss) on investments	-			(2		)	2			3
Reclassification adjustments included in net income	-			-			(8		)	-
At end of period	12			16			12			16
At end of period	(8		)	(3		)	(8		)	(3		)
Retained Earnings
At beginning of period	1,143			1,040			1,065			950
Net income	181			195			496			499
Dividends declared on common stock	(111		)	(148		)	(347		)	(361		)
Dividends declared on preferred stock	-			-			(1		)	(1		)
At end of period	1,213			1,087			1,213			1,087
Preferred Stock
At beginning and end of period	37			37			37			37
Total Equity at End of Period	$	6,532		$	5,961		$	6,532		$	5,961

The accompanying notes are an integral part of these statements.

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CMS Energy Corporation

Consumers Energy Company

Notes to the Unaudited Consolidated Financial Statements

These interim consolidated financial statements have been prepared by CMS Energy and Consumers in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. As a result, CMS Energy and Consumers have condensed or omitted certain information and note disclosures normally included in consolidated financial statements prepared in accordance with GAAP. CMS Energy and Consumers have reclassified certain prior period amounts to conform to the presentation in the current period and to reflect the implementation of new accounting standards. CMS Energy and Consumers are required to make estimates using assumptions that may affect reported amounts and disclosures; actual results could differ from these estimates. In management’s opinion, the unaudited information contained in this report reflects all adjustments of a normal recurring nature necessary to ensure that CMS Energy’s and Consumers’ financial position, results of operations, and cash flows for the periods presented are fairly stated. The notes to the unaudited consolidated financial statements and the related unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes contained in the 2016 Form 10-K. Due to the seasonal nature of CMS Energy’s and Consumers’ operations, the results presented for this interim period are not necessarily indicative of results to be achieved for the fiscal year.

1:NEW ACCOUNTING STANDARDS

Implementation of New Accounting Standards

ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost: This standard was issued to improve the reporting of net benefit cost by employers that offer defined benefit pension plans and other postretirement benefit plans. The required effective date of the standard for CMS Energy and Consumers is January 1, 2018, but early adoption was permitted in the first interim period of 2017. CMS Energy and Consumers elected to adopt the standard as of January 1, 2017. The standard requires employers to report the service cost component of net benefit cost in the same line item on the income statement as other employee compensation costs, while presenting the other cost components separately outside of operating income. This change is to be applied retrospectively to all prior periods presented. Accordingly, for the three months and nine months ended September 30, 2017 and 2016, CMS Energy and Consumers have presented the service cost component of their retirement benefits plans in maintenance and other operating expenses on the consolidated statements of income, while presenting the other components in nonoperating retirement benefits, net, under other income (expense). Prior to this standard, CMS Energy and Consumers had presented all of the cost components in maintenance and other operating expenses. Under a practical expedient permitted by the standard, CMS Energy and Consumers used benefit cost amounts disclosed for prior periods as the basis for retrospective application.

In addition, under this standard, only the service cost component is eligible for capitalization as part of the cost of an asset. This change is to be applied prospectively upon adoption. Accordingly, for the three months and nine months ended September 30, 2017, CMS Energy and Consumers capitalized a portion of the service cost component of their retirement benefits plans to plant, property, and equipment, while recognizing the other components in net income. In prior periods, a portion of all cost components was capitalized. For further details on the net periodic cost of CMS Energy’s and Consumers’ retirement benefits plans, see Note 8, Retirement Benefits. The implementation of this standard did not have a material impact on CMS Energy’s or Consumers’ consolidated net income, cash flows, or financial position.

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New Accounting Standards Not Yet Effective

ASU 2014-09, Revenue from Contracts with Customers: This standard provides new guidance for recognizing revenue from contracts with customers. A primary objective of the standard is to provide a single, comprehensive revenue recognition model that will be applied across entities, industries, and capital markets. The new guidance will replace most of the existing revenue recognition requirements in GAAP, although certain guidance specific to rate-regulated utilities will be retained. The standard will be effective on January 1, 2018 for CMS Energy and Consumers, but early adoption in 2017 is permitted. Entities will have the option to apply the standard retrospectively to all prior periods presented, or to apply it retrospectively only to contracts existing at the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings. CMS Energy and Consumers are not adopting the standard early, and will apply the standard retrospectively only to contracts existing on the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings.

CMS Energy and Consumers are continuing to evaluate the standard; however, they do not expect that it will have a material impact on their consolidated net income, cash flows, or financial position. CMS Energy and Consumers will provide additional disclosures about their revenues in accordance with the new standard, but they have not yet identified any significant changes in their revenue recognition practices that may be required.

ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities: This standard, which will be effective January 1, 2018 for CMS Energy and Consumers, is intended to improve the accounting for financial instruments. The standard will require investments in equity securities to be measured at fair value, with changes in fair value recognized in net income, except for certain investments such as those that qualify for equity-method accounting. The standard will no longer permit unrealized gains and losses for certain equity investments to be recorded in AOCI. CMS Energy and Consumers presently record unrealized gains and losses on certain equity investments, including the mutual funds in the DB SERP and Consumers’ investment in CMS Energy common stock, in AOCI, except that unrealized losses determined to be other than temporary are reported in earnings. For further details on these investments, see Note 6, Financial Instruments. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded to beginning retained earnings on the effective date.

ASU 2016-02, Leases: This standard establishes a new accounting model for leases. The standard will require entities to recognize lease assets and liabilities on the balance sheet for all leases with a term of more than one year, including operating leases, which are not recorded on the balance sheet under existing standards. As a result, CMS Energy and Consumers expect to recognize additional lease assets and liabilities for their operating leases under this standard. The new guidance will also amend the definition of a lease to require that a lessee control the use of a specified asset, and not simply control or take the output of the asset. On the income statement, leases that meet existing capital lease criteria will generally be accounted for under a financing model, while operating leases will generally be accounted for under a straight-line expense model. The standard will be effective on January 1, 2019 for CMS Energy and Consumers, but early adoption is permitted. CMS Energy and Consumers are continuing to evaluate the impact of the standard on their consolidated financial statements and do not presently expect to adopt the standard early.

ASU 2016-13, Measurement of Credit Losses on Financial Instruments: This standard, which will be effective January 1, 2020 for CMS Energy and Consumers, provides new guidance for estimating and recording credit losses on financial instruments. The standard will apply to the recognition of loan losses at EnerBank as well as to the recognition of uncollectible accounts expense at Consumers. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded

52

to beginning retained earnings on the effective date. CMS Energy and Consumers are evaluating the impact of the standard on their consolidated financial statements.

2:REGULATORY MATTERS

Regulatory matters are critical to Consumers. The Michigan Attorney General, ABATE, the MPSC Staff, and certain other parties typically participate in MPSC proceedings concerning Consumers, such as Consumers’ rate cases and PSCR and GCR processes. These parties often challenge various aspects of those proceedings, including the prudence of Consumers’ policies and practices, and seek cost disallowances and other relief. The parties also have appealed significant MPSC orders. Depending upon the specific issues, the outcomes of rate cases and proceedings, including judicial proceedings challenging MPSC orders or other actions, could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. Consumers cannot predict the outcome of these proceedings.

There are multiple appeals pending that involve various issues concerning cost recovery from customers, the adequacy of the record evidence supporting the recovery of Smart Energy investments, and other matters. Consumers is unable to predict the outcome of these appeals.

Electric Rate Case: In March 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $225 million, based on a 10.7 percent authorized return on equity. In September 2016, Consumers self-implemented an annual rate increase of $170 million, subject to refund with interest. The MPSC issued an order in February 2017, authorizing an annual rate increase of $113 million, based on a 10.1 percent authorized return on equity.

In May 2017, Consumers filed a reconciliation of total revenues collected during self-implementation to those that would have been collected under final rates. The reconciliation indicated that a refund would be required, and Consumers had a $17 million recorded reserve for customer refunds at September 30, 2017. In October 2017, the MPSC approved a settlement agreement that will result in a $17 million refund to customers during December 2017.

Gas Rate Case: In August 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $90 million, based on a 10.6 percent authorized return on equity. Consumers later reduced its requested annual rate increase to $80 million. In January 2017, Consumers self-implemented an annual rate increase of $20 million.

The MPSC issued an order in July 2017, authorizing an annual rate increase of $29 million beginning in August 2017. The MPSC also approved an investment recovery mechanism that will provide for additional annual rate increases of $18 million beginning in 2018 and another $18 million beginning in 2019 for incremental investments that Consumers plans to make in those years, subject to reconciliation. These future investments are intended to help ensure adequate system capacity, deliverability, and safety. The investment recovery surcharge will remain in effect until rates are reset in a subsequent general rate case.

Energy Optimization Plan Incentive: In September 2017, the MPSC approved a settlement agreement authorizing Consumers to collect $18 million during 2018 as an incentive for exceeding its statutory savings targets in 2016. Consumers recognized incentive revenue under this program of $18 million in 2016.

Depreciation Rate Case: In August 2016, Consumers filed a depreciation rate case related to its gas utility property, requesting to decrease depreciation expense by $3 million annually. In March 2017, the MPSC approved a settlement agreement authorizing the requested decrease in depreciation expense effective as of January 2017.

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FERC Transmission Order: In September 2016, FERC issued an order reducing the rate of return on equity earned by transmission owners operating within MISO to a base of 10.32 percent from 12.38 percent. FERC ordered MISO and transmission owners to provide refunds, with interest, to transmission customers such as Consumers for the period from November 2013 through February 2015. In February 2017, as a result of this order, Consumers received from MISO a credit of $28 million, which it will return to its electric customers through the PSCR ratemaking process. The FERC order is subject to further legal proceedings and Consumers’ MISO credit may be adjusted accordingly.

3:CONTINGENCIES AND COMMITMENTS

CMS Energy and Consumers are involved in various matters that give rise to contingent liabilities. Depending on the specific issues, the resolution of these contingencies could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. In their disclosures of these matters, CMS Energy and Consumers provide an estimate of the possible loss or range of loss when such an estimate can be made. Disclosures that state that CMS Energy or Consumers cannot predict the outcome of a matter indicate that they are unable to estimate a possible loss or range of loss for the matter.

CMS Energy Contingencies

Gas Index Price Reporting Litigation: CMS Energy, along with CMS MST, CMS Field Services, Cantera Natural Gas, Inc., and Cantera Gas Company, have been named as defendants in four class action lawsuits and one individual lawsuit arising as a result of alleged inaccurate natural gas price reporting to publications that report trade information. Allegations include price-fixing conspiracies, restraint of trade, and artificial inflation of natural gas retail prices in Kansas, Missouri, and Wisconsin. Plaintiffs are making claims for the following: treble damages, full consideration damages, exemplary damages, costs, interest, and/or attorneys’ fees.

After removal to federal court, all of the cases were transferred to a single federal district court pursuant to the multidistrict litigation process. In 2010 and 2011, all claims against CMS Energy defendants were dismissed by the district court based on FERC preemption. In 2013, the U.S. Court of Appeals for the Ninth Circuit reversed the district court decision. The appellate court found that FERC preemption does not apply under the facts of these cases. The appellate court affirmed the district court’s denial of leave to amend to add federal antitrust claims. The matter was appealed to the U.S. Supreme Court, which in 2015 upheld the Ninth Circuit’s decision. The cases were remanded back to the federal district court.

In May 2016, the federal district court granted the defendants’ motion for summary judgment in the individual lawsuit based on a release in a prior settlement involving similar allegations and reinstated CMS Energy as a defendant in one of the class action lawsuits. The order of summary judgment has been appealed.

In December 2016, CMS Energy entities reached a settlement with the plaintiffs in the three Kansas and Missouri cases for an amount that was not material to CMS Energy. In August 2017, the federal district court approved the settlement.

CMS Energy entities remain as defendants in the Wisconsin class action lawsuits. In March 2017, the federal district court denied plaintiffs’ motion for class certification. The plaintiffs appealed that decision to the U.S. Court of Appeals for the Ninth Circuit, which has accepted the matter for hearing. In June 2017, an unaffiliated company that is also a defendant in these cases filed for bankruptcy, which could increase the risk of loss to CMS Energy.

These cases involve complex facts, a large number of similarly situated defendants with different factual positions, and multiple jurisdictions. Presently, any estimate of liability would be highly speculative; the

54

amount of CMS Energy’s reasonably possible loss would be based on widely varying models previously untested in this context. If the outcome after appeals is unfavorable, these cases could negatively affect CMS Energy’s liquidity, financial condition, and results of operations.

Bay Harbor: CMS Land retained environmental remediation obligations for the collection and treatment of leachate, a liquid consisting of water and other substances, at Bay Harbor after selling its interests in the development in 2002. Leachate is produced when water enters into cement kiln dust piles left over from former cement plant operations at the site. In 2012, CMS Land and the MDEQ finalized an agreement that established the final remedies and the future water quality criteria at the site. CMS Land completed all construction necessary to implement the remedies required by the agreement and will continue to maintain and operate a system to discharge treated leachate into Little Traverse Bay under an NPDES permit issued in 2010 and renewed in October 2016. The renewed NPDES permit is valid through September 2020.

Various claims have been brought against CMS Land or its affiliates, including CMS Energy, alleging environmental damage to property, loss of property value, insufficient disclosure of environmental matters, breach of agreement relating to access, or other matters. CMS Land and other parties have received a demand for payment from the EPA in the amount of $8 million, plus interest. The EPA is seeking recovery under CERCLA of response costs allegedly incurred at Bay Harbor. These costs exceed what was agreed to in a 2005 order between CMS Land and the EPA, and CMS Land has communicated to the EPA that it does not believe that this is a valid claim. The EPA has filed a lawsuit to collect these costs.

At September 30, 2017, CMS Energy had a recorded liability of $49 million for its remaining obligations for environmental remediation. CMS Energy calculated this liability based on discounted projected costs, using a discount rate of 4.34 percent and an inflation rate of one percent on annual operating and maintenance costs. The undiscounted amount of the remaining obligation is $62 million. CMS Energy expects to pay the following amounts for long-term liquid disposal and operating and maintenance costs during the remainder of 2017 and in each of the next five years:

							In Millions
	2017		2018		2019		2020		2021		2022
CMS Energy
Long-term liquid disposal and operating and maintenance costs	$	1	$	4	$	4	$	4	$	4	$	4

CMS Energy’s estimate of response activity costs and the timing of expenditures could change if there are changes in circumstances or assumptions used in calculating the liability. Although a liability for its present estimate of remaining response activity costs has been recorded, CMS Energy cannot predict the ultimate financial impact or outcome of this matter.

Equatorial Guinea Tax Claim: In 2002, CMS Energy sold its oil, gas, and methanol investments in Equatorial Guinea. The government of Equatorial Guinea claims that, in connection with the sale, CMS Energy owes $152 million in taxes, plus substantial penalties and interest that could be up to the amount of the taxes claimed. The matter is proceeding to formal arbitration. CMS Energy has concluded that the government’s tax claim is without merit and is contesting the claim, but cannot predict the financial impact or outcome of the matter. An unfavorable outcome could have a material adverse effect on CMS Energy’s liquidity, financial condition, and results of operations.

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Consumers Electric Utility Contingencies

Electric Environmental Matters: Consumers’ operations are subject to environmental laws and regulations. Historically, Consumers has generally been able to recover, in customer rates, the costs to operate its facilities in compliance with these laws and regulations.

Cleanup and Solid Waste: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. Consumers believes that these costs should be recoverable in rates, but cannot guarantee that outcome. Consumers estimates that its liability for NREPA sites for which it can estimate a range of loss will be between $3 million and $4 million. At September 30, 2017, Consumers had a recorded liability of $3 million, the minimum amount in the range of its estimated probable NREPA liability, as no amount in the range was considered a better estimate than any other amount.

Consumers is a potentially responsible party at a number of contaminated sites administered under CERCLA. CERCLA liability is joint and several. In 2010, Consumers received official notification from the EPA that identified Consumers as a potentially responsible party for cleanup of PCBs at the Kalamazoo River CERCLA site. The notification claimed that the EPA has reason to believe that Consumers disposed of PCBs and arranged for the disposal and treatment of PCB-containing materials at portions of the site. In 2011, Consumers received a follow-up letter from the EPA requesting that Consumers agree to participate in a removal action plan along with several other companies for an area of lower Portage Creek, which is connected to the Kalamazoo River. All parties, including Consumers, that were asked to participate in the removal action plan declined to accept liability. Until further information is received from the EPA, Consumers is unable to estimate a range of potential liability for cleanup of the river.

Based on its experience, Consumers estimates that its share of the total liability for known CERCLA sites will be between $3 million and $8 million. Various factors, including the number and creditworthiness of potentially responsible parties involved with each site, affect Consumers’ share of the total liability. At September 30, 2017, Consumers had a recorded liability of $3 million for its share of the total liability at these sites, the minimum amount in the range of its estimated probable CERCLA liability, as no amount in the range was considered a better estimate than any other amount.

The timing of payments related to Consumers’ remediation and other response activities at its CERCLA and NREPA sites is uncertain. Consumers periodically reviews these cost estimates. A change in the underlying assumptions, such as an increase in the number of sites, different remediation techniques, the nature and extent of contamination, and legal and regulatory requirements, could affect its estimates of NREPA and CERCLA liability.

Ludington PCB: In 1998, during routine maintenance activities, Consumers identified PCB as a component in certain paint, grout, and sealant materials at Ludington. Consumers removed part of the PCB material and replaced it with non-PCB material. Consumers has had several communications with the EPA regarding this matter, but cannot predict the financial impact or outcome.

Consumers Gas Utility Contingencies

Gas Environmental Matters: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. These sites include 23 former MGP facilities. Consumers operated the facilities on these sites for some part of their operating lives. For some of these sites, Consumers has no present ownership interest or may own only a portion of the original site.

At September 30, 2017, Consumers had a recorded liability of $93 million for its remaining obligations for these sites. This amount represents the present value of long-term projected costs, using a discount rate of 2.57 percent and an inflation rate of 2.5 percent. The undiscounted amount of the remaining

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obligation is $104 million. Consumers expects to pay the following amounts for remediation and other response activity costs during the remainder of 2017 and in each of the next five years:

									In Millions
	2017		2018		2019		2020		2021		2022
Consumers
Remediation and other response activity costs	$	8	$	16	$	18	$	10	$	18	$	7

Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, changes in remediation techniques, or legal and regulatory requirements, could affect Consumers’ estimates of annual response activity costs and the MGP liability.

Pursuant to orders issued by the MPSC, Consumers defers its MGP-related remediation costs and recovers them from its customers over a ten-year period. At September 30, 2017, Consumers had a regulatory asset of $141 million related to the MGP sites.

Consumers estimates that its liability to perform remediation and other response activities at NREPA sites other than the MGP sites could reach $3 million. At September 30, 2017, Consumers had a recorded liability of less than $1 million, the minimum amount in the range of its estimated probable liability, as no amount in the range was considered a better estimate than any other amount.

Guarantees

Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2017:

					In Millions
			Maximum		Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation		Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1	Various	Indefinite	$	153	$	7
Guarantees2	Various	Indefinite	45		-
Consumers
Guarantee2	July 2011	Indefinite	$	30	$	-

1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

2At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the U.S. Department of Energy and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee.

Additionally, in the normal course of business, CMS Energy, Consumers, and certain other subsidiaries of CMS Energy have entered into various agreements containing tax and other indemnity provisions for which they are unable to estimate the maximum potential obligation. The carrying value of these indemnity obligations is $1 million. CMS Energy and Consumers consider the likelihood that they would be required to perform or incur substantial losses related to these indemnities to be remote.

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Other Contingencies

In addition to the matters disclosed in this Note and Note 2, Regulatory Matters, there are certain other lawsuits and administrative proceedings before various courts and governmental agencies arising in the ordinary course of business to which CMS Energy, Consumers, and certain other subsidiaries of CMS Energy are parties. These other lawsuits and proceedings may involve personal injury, property damage, contracts, environmental matters, federal and state taxes, rates, licensing, employment, and other matters. Further, CMS Energy and Consumers occasionally self-report certain regulatory non-compliance matters that may or may not eventually result in administrative proceedings. CMS Energy and Consumers believe that the outcome of any one of these proceedings will not have a material negative effect on their consolidated results of operations, financial condition, or liquidity.

4:FINANCINGS AND CAPITALIZATION

Financings: Presented in the following table is a summary of major long-term debt transactions during the nine months ended September 30, 2017.

	Principal (In Millions)		Interest Rate		Issue/Retirement Date	Maturity Date
Debt issuances
CMS Energy, parent only
Senior notes	$	350	3.450	%	February 2017	August 2027
Total CMS Energy, parent only	$	350
Consumers
First mortgage bonds	$	350	3.950	%	February 2017	July 2047
First mortgage bonds1	40		3.180		September 2017	September 2032
First mortgage bonds1	125		3.520		September 2017	September 2037
First mortgage bonds1	20		3.860		September 2017	September 2052
Total Consumers	$	535
Total CMS Energy	$	885
Debt retirements
Consumers
First mortgage bonds	$	250	5.150	%	February 2017	February 2017
Senior notes	180		6.875		September 2017	March 2018
Total Consumers	$	430
Total CMS Energy	$	430

1These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032, $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

In October 2017, Consumers retired $100 million of 3.21-percent first mortgage bonds at maturity.

Term Loan: In April 2017, CMS Energy reached an agreement to extend the maturity date of its $180 million term loan by one year, through April 2019.

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Revolving Credit Facilities: The following secured revolving credit facilities with banks were available at September 30, 2017:

							In Millions
Expiration Date	Amount of Facility		Amount Borrowed		Letters of Credit Outstanding		Amount Available
CMS Energy, parent only
May 27, 20221,2	$	550	$	-	$	1	$	549
Consumers
May 27, 20222,3	$	650	$	-	$	7	$	643
November 23, 20183	250		-		-		250
September 9, 20193,4	30		-		30		-

1During the nine months ended September 30, 2017, CMS Energy’s average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

2In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

3Obligations under this facility are secured by first mortgage bonds of Consumers.

4In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, commercial paper notes with maturities of up to 365 days and that bear interest at fixed or floating rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity. At September 30, 2017, $230 million of commercial paper notes were outstanding under this program and recorded as current notes payable on the consolidated balance sheets of CMS Energy and Consumers.

Dividend Restrictions: At September 30, 2017, payment of dividends by CMS Energy on its common stock was limited to $4.5 billion under provisions of the Michigan Business Corporation Act of 1972.

Under the provisions of its articles of incorporation, at September 30, 2017, Consumers had $1.1 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process.

For the nine months ended September 30, 2017, Consumers paid $347 million in dividends on its common stock to CMS Energy.

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Issuance of Common Stock: In March 2017, CMS Energy entered into an updated continuous equity offering program permitting it to sell, from time to time in “at the market” offerings, common stock having an aggregate sales price of up to $100 million. Presented in the following table are the transactions that CMS Energy entered into under the program:

	Number of Shares Issued	Average Price per Share		Net Proceeds (In Millions)
June 2017	1,494,371	$	47.31	$	70

5:FAIR VALUE MEASUREMENTS

Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. When measuring fair value, CMS Energy and Consumers are required to incorporate all assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. A fair value hierarchy prioritizes inputs used to measure fair value according to their observability in the market. The three levels of the fair value hierarchy are as follows:

·     Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

·     Level 2 inputs are observable, market-based inputs, other than Level 1 prices. Level 2 inputs may include quoted prices for similar assets or liabilities in active markets, quoted prices in inactive markets, and inputs derived from or corroborated by observable market data.

·     Level 3 inputs are unobservable inputs that reflect CMS Energy’s or Consumers’ own assumptions about how market participants would value their assets and liabilities.

CMS Energy and Consumers classify fair value measurements within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement in its entirety.

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Assets and Liabilities Measured at Fair Value on a Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

							In Millions
	CMS Energy, including Consumers				Consumers
	September 30		December 31		September 30		December 31
	2017		2016		2017		2016
Assets1
Cash equivalents	$	21	$	44	$	-	$	-
Restricted cash equivalents	27		19		27		19
CMS Energy common stock	-		-		21		33
Nonqualified deferred compensation plan assets	13		12		9		8
DB SERP
Cash equivalents	4		3		3		2
Mutual funds	145		141		105		102
Derivative instruments
Commodity contracts	2		1		2		1
Total	$	212	$	220	$	167	$	165
Liabilities1
Nonqualified deferred compensation plan liabilities	$	13	$	12	$	9	$	8
Derivative instruments
Commodity contracts	1		-		1		-
Total	$	14	$	12	$	10	$	8

1All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Cash Equivalents: Cash equivalents and restricted cash equivalents consist of money market funds with daily liquidity. Short-term debt instruments classified as cash equivalents on the consolidated balance sheets are not included since they are recorded at amortized cost.

Nonqualified Deferred Compensation Plan Assets and Liabilities: The nonqualified deferred compensation plan assets consist of mutual funds, which are valued using the daily quoted net asset values. CMS Energy and Consumers value their nonqualified deferred compensation plan liabilities based on the fair values of the plan assets, as they reflect what is owed to the plan participants in accordance with their investment elections. CMS Energy and Consumers report the assets in other non-current assets and the liabilities in other non-current liabilities on their consolidated balance sheets.

DB SERP Assets: The DB SERP cash equivalents consist of a money market fund with daily liquidity. The DB SERP invests in mutual funds that hold primarily fixed-income instruments of varying maturities. In order to meet their investment objectives, the funds hold investment-grade debt securities, and may invest a portion of their assets in high-yield securities, foreign debt, and derivative instruments. CMS Energy and Consumers value these funds using the daily quoted net asset values. CMS Energy and Consumers report their DB SERP assets in other non-current assets on their consolidated balance sheets. For additional details about DB SERP securities, see Note 6, Financial Instruments.

Derivative Instruments: CMS Energy and Consumers value their derivative instruments using either a market approach that incorporates information from market transactions, or an income approach that discounts future expected cash flows to a present value amount. CMS Energy values its exchange-traded

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derivative contracts based on Level 1 quoted prices. CMS Energy’s and Consumers’ remaining derivatives are classified as Level 3.

The majority of these derivatives are FTRs held by Consumers. Consumers uses FTRs to manage price risk related to electricity transmission congestion. An FTR is a financial instrument that entitles its holder to receive compensation or requires its holder to remit payment for congestion-related transmission charges. Under regulatory accounting, all changes in fair value associated with FTRs are deferred as regulatory assets and liabilities until the instruments are settled. Due to the lack of quoted pricing information, Consumers determines the fair value of its FTRs based on Consumers’ average historical settlements.

6:FINANCIAL INSTRUMENTS

Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 5, Fair Value Measurements.

											In Millions
	September 30, 2017										December 31, 2016
			Fair Value										Fair Value
	Carrying				Level						Carrying				Level
	Amount		Total		1		2		3		Amount		Total		1		2		3
CMS Energy, including Consumers
Assets
Long-term receivables1	$	22	$	22	$	-	$	-	$	22	$	22	$	22	$	-	$	-	$	22
Notes receivable2	1,382		1,479		-		-		1,479		1,326		1,415		-		-		1,415
Securities held to maturity	16		16		-		16		-		13		13		-		13		-
Liabilities
Long-term debt3	9,983		10,484		-		9,331		1,153		9,504		9,953		-		8,990		963
Long-term payables4	18		18		-		-		18		17		17		-		-		17
Consumers
Assets
Long-term receivables1	$	22	$	22	$	-	$	-	$	22	$	22	$	22	$	-	$	-	$	22
Notes receivable5	46		46		-		-		46		45		45		-		-		45
Liabilities
Long-term debt6	5,718		6,032		-		4,879		1,153		5,628		5,903		-		4,940		963

1Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

2Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

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3Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

4Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

5Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

6Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

At CMS Energy, notes receivable consist primarily of EnerBank’s fixed-rate installment loans. EnerBank estimates the fair value of these loans using a discounted cash flows technique that incorporates market interest rates as well as assumptions about the remaining life of the loans and credit risk.

CMS Energy and Consumers estimate the fair value of their long-term debt using quoted prices from market trades of the debt, if available. In the absence of quoted prices, CMS Energy and Consumers calculate market yields and prices for the debt using a matrix method that incorporates market data for similarly rated debt. Depending on the information available, other valuation techniques and models may be used that rely on assumptions that cannot be observed or confirmed through market transactions.

The effects of third-party credit enhancements are excluded from the fair value measurements of long-term debt. At September 30, 2017 and December 31, 2016, CMS Energy’s long-term debt included $103 million principal amount that was supported by third-party credit enhancements. This entire principal amount was at Consumers.

Presented in the following table are CMS Energy’s and Consumers’ investment securities classified as available for sale or held to maturity:

	In Millions
	September 30, 2017								December 31, 2016
			Unrealized		Unrealized		Fair				Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds	$	142	$	3	$	-	$	145	$	141	$	-	$	-	$	141
Held to maturity
Debt securities	16		-		-		16		13		-		-		13
Consumers
Available for sale
DB SERP
Mutual funds	$	103	$	2	$	-	$	105	$	102	$	-	$	-	$	102
CMS Energy common stock	2		19		-		21		4		29		-		33

The mutual funds classified as available for sale hold primarily fixed-income instruments of varying maturities. Debt securities classified as held to maturity consist primarily of mortgage-backed securities and Utah Housing Corporation bonds held by EnerBank.

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7:NOTES RECEIVABLE

Presented in the following table are details of CMS Energy’s and Consumers’ current and non-current notes receivable:

			In Millions
	September 30, 2017		December 31, 2016
CMS Energy, including Consumers
Current
EnerBank notes receivable, net of allowance for loan losses	$	167	$	151
EnerBank notes receivable held for sale	31		39
Michigan tax settlement	30		29
Non-current
EnerBank notes receivable	1,134		1,088
Michigan tax settlement	20		19
Total notes receivable	$	1,382	$	1,326
Consumers
Current
Michigan tax settlement	$	30	$	29
Non-current
Michigan tax settlement	16		16
Total notes receivable	$	46	$	45

EnerBank notes receivable are unsecured consumer installment loans for financing home improvements. EnerBank records its notes receivable at cost, less an allowance for loan losses. In March 2017, EnerBank completed a sale of notes receivable, receiving proceeds of $19 million and recording an insignificant gain. At September 30, 2017, $31 million of notes receivable remained classified as held for sale; the fair value of notes receivable held for sale exceeded their carrying value. These notes are expected to be sold in 2017.

Authorized contractors pay fees to EnerBank to provide borrowers with same-as-cash, zero interest, or reduced interest loans. Unearned income associated with the loan fees, which is recorded as a reduction to notes receivable on CMS Energy’s consolidated balance sheets, was $83 million at September 30, 2017 and $84 million at December 31, 2016. Unearned income associated with the loan fees for notes receivable held for sale was $6 million at September 30, 2017 and $8 million at December 31, 2016.

The allowance for loan losses is a valuation allowance to reflect estimated credit losses. The allowance is increased by the provision for loan losses and decreased by loan charge-offs net of recoveries. Management estimates the allowance balance required by taking into consideration historical loan loss experience, the nature and volume of the portfolio, economic conditions, and other factors. Loan losses are charged against the allowance when the loss is confirmed, but no later than the point at which a loan becomes 120 days past due.

Loans that are 30 days or more past due are considered delinquent. The balance of EnerBank’s delinquent consumer loans was $12 million at September 30, 2017 and $11 million at December 31, 2016.

At September 30, 2017 and December 31, 2016, $1 million of EnerBank’s loans had been modified as troubled debt restructurings.

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8:RETIREMENT BENEFITS

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans.

CMS Energy and Consumers elected to adopt ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, as of January 1, 2017. For further details on the implementation of this standard, see Note 1, New Accounting Standards.

Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

													In Millions
	DB Pension Plan												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost	$	12		$	10		$	34		$	31		$	5		$	5		$	15		$	14
Interest cost	23			21			67			64			13			12			39			35
Expected return on plan assets	(39		)	(36		)	(115		)	(110		)	(22		)	(22		)	(67		)	(65		)
Amortization of:
Net loss	20			17			60			52			7			5			23			16
Prior service cost (credit)	1			1			3			3			(8		)	(10		)	(26		)	(31		)
Net periodic cost (credit)	$	17		$	13		$	49		$	40		$	(5	)	$	(10	)	$	(16	)	$	(31	)
Consumers
Net periodic cost (credit)
Service cost	$	11		$	11		$	33		$	31		$	5		$	4		$	14		$	13
Interest cost	22			20			65			62			12			12			38			34
Expected return on plan assets	(38		)	(35		)	(112		)	(107		)	(21		)	(20		)	(63		)	(60		)
Amortization of:
Net loss	19			16			58			50			8			5			24			16
Prior service cost (credit)	1			1			3			3			(8		)	(10		)	(25		)	(30		)
Net periodic cost (credit)	$	15		$	13		$	47		$	39		$	(4	)	$	(9	)	$	(12	)	$	(27	)

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9:INCOME TAXES

Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:

Nine Months Ended September 30	2017		2016
CMS Energy, including Consumers
U.S. federal income tax rate	35.0	%	35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1	2.3		4.2
Accelerated flow-through of regulatory tax benefits2	(4.3	)	(4.7	)
Employee share-based awards	(0.9	)	(0.8	)
Other, net	(2.0	)	(1.4	)
Effective tax rate	30.1	%	32.3	%
Consumers
U.S. federal income tax rate	35.0	%	35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1	2.3		4.6
Accelerated flow-through of regulatory tax benefits2	(3.9	)	(4.0	)
Employee share-based awards	(0.8	)	(0.7	)
Other, net	(2.3	)	(1.2	)
Effective tax rate	30.3	%	33.7	%

1In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers’ electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy’s effective tax rate and a 2.2 percentage point reduction to Consumers’ effective tax rate.

2Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers’ recognition of the income tax benefits, reduced Consumers’ income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

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10:EARNINGS PER SHARE—CMS ENERGY

Presented in the following table are CMS Energy’s basic and diluted EPS computations based on net income:

				In Millions, Except Per Share Amounts
	Three Months Ended					Nine Months Ended
September 30		2017		2016		2017		2016
Income available to common stockholders
Net income		$	172	$	186	$	464	$	475
Less income attributable to noncontrolling interests		-		-		1		1
Net income available to common stockholders – basic and diluted		$	172	$	186	$	463	$	474
Average common shares outstanding
Weighted-average shares – basic		280.8		278.2		279.8		277.7
Add dilutive nonvested stock awards		0.8		1.0		0.8		1.1
Weighted-average shares – diluted		281.6		279.2		280.6		278.8
Net income per average common share available to common stockholders
Basic		$	0.61	$	0.67	$	1.65	$	1.71
Diluted		0.61		0.67		1.65		1.70

Nonvested Stock Awards

CMS Energy’s nonvested stock awards are composed of participating and non-participating securities. The participating securities accrue cash dividends when common stockholders receive dividends. Since the recipient is not required to return the dividends to CMS Energy if the recipient forfeits the award, the nonvested stock awards are considered participating securities. As such, the participating nonvested stock awards were included in the computation of basic EPS. The non-participating securities accrue stock dividends that vest concurrently with the stock award. If the recipient forfeits the award, the stock dividends accrued on the non-participating securities are also forfeited. Accordingly, the non-participating awards and stock dividends were included in the computation of diluted EPS, but not basic EPS.

11:CASH AND CASH EQUIVALENTS

Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:

			In Millions
	September 30		December 31
	2017		2016
CMS Energy, including Consumers
Cash and cash equivalents	$	142	$	235
Restricted cash and cash equivalents	27		19
Other non-current assets	4		3
Cash and cash equivalents, including restricted amounts	$	173	$	257
Consumers
Cash and cash equivalents	$	55	$	131
Restricted cash and cash equivalents	27		19
Other non-current assets	3		2
Cash and cash equivalents, including restricted amounts	$	85	$	152

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Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less.

Restricted Cash and Cash Equivalents: Restricted cash and cash equivalents are held primarily for the repayment of securitization bonds. Cash and cash equivalents may also be restricted to pay other contractual obligations such as leasing of coal rail cars. These amounts are classified as current assets since they relate to payments that could or will occur within one year.

Other Non-current Assets: The cash equivalents classified as other non-current assets represent an investment in a money market fund held in the DB SERP rabbi trust. See Note 5, Fair Value Measurements for more information regarding the DB SERP.

Implementation of ASU 2016-18, Restricted Cash: CMS Energy and Consumers have early adopted the provisions of ASU 2016-18, Restricted Cash, which requires restricted cash and cash equivalents to be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period amounts shown on the statement of cash flows. In addition, the standard requires that entities apply the new guidance retrospectively to all prior periods presented. Accordingly, CMS Energy and Consumers made the following adjustments to prior-period amounts on their consolidated statements of cash flows:

	In Millions
Nine Months Ended September 30	2016
CMS Energy, including Consumers
Change in:
Net cash used in investing activities	$	7
Cash and cash equivalents, including restricted amounts, end of period	29
Consumers
Change in:
Net cash used in investing activities	$	8
Cash and cash equivalents, including restricted amounts, end of period	29

12:REPORTABLE SEGMENTS

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy’s common stockholders.

CMS Energy

The reportable segments for CMS Energy are:

·electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

·gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

·enterprises, consisting of various subsidiaries engaging primarily in domestic independent power production

CMS Energy presents EnerBank and corporate interest and other expenses within other reconciling items.

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Consumers

The reportable segments for Consumers are:

·electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

·gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

Consumers’ other consolidated entities are presented within other reconciling items.

Presented in the following tables is financial information by reportable segment:

										In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
CMS Energy, including Consumers
Operating revenue
Electric utility	$	1,247		$	1,313		$	3,360		$	3,348
Gas utility	190			185			1,176			1,166
Enterprises	58			59			172			156
Other reconciling items	32			30			97			89
Total operating revenue – CMS Energy	$	1,527		$	1,587		$	4,805		$	4,759
Consumers
Operating revenue
Electric utility	$	1,247		$	1,313		$	3,360		$	3,348
Gas utility	190			185			1,176			1,166
Total operating revenue – Consumers	$	1,437		$	1,498		$	4,536		$	4,514
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility	$	176		$	191		$	394		$	395
Gas utility	5			3			101			102
Enterprises	8			8			27			17
Other reconciling items	(17		)	(16		)	(59		)	(40		)
Total net income available to common stockholders – CMS Energy	$	172		$	186		$	463		$	474
Consumers
Net income available to common stockholder
Electric utility	$	176		$	191		$	394		$	395
Gas utility	5			3			101			102
Other reconciling items	-			1			-			1
Total net income available to common stockholder – Consumers	$	181		$	195		$	495		$	498

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			In Millions
	September 30, 2017		December 31, 2016
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1	$	15,056	$	14,540
Gas utility1	6,713		6,283
Enterprises	164		157
Other reconciling items	33		30
Total plant, property, and equipment, gross – CMS Energy	$	21,966	$	21,010
Consumers
Plant, property, and equipment, gross
Electric utility1	$	15,056	$	14,540
Gas utility1	6,713		6,283
Other reconciling items	15		15
Total plant, property, and equipment, gross – Consumers	$	21,784	$	20,838
CMS Energy, including Consumers
Total assets
Electric utility1	$	13,639	$	13,429
Gas utility1	6,701		6,446
Enterprises	280		269
Other reconciling items	1,500		1,478
Total assets – CMS Energy	$	22,120	$	21,622
Consumers
Total assets
Electric utility1	$	13,640	$	13,430
Gas utility1	6,701		6,446
Other reconciling items	39		70
Total assets – Consumers	$	20,380	$	19,946

1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.

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Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management’s discussion and analysis of financial condition and results of operations for CMS Energy and Consumers is contained in Part I—Item 1. Financial Statements—MD&A, which is incorporated by reference herein.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes to market risk as previously disclosed in Part II—Item 7A. Quantitative and Qualitative Disclosures About Market Risk, in the 2016 Form 10-K.

Item 4.    Controls and Procedures

CMS ENERGY

Disclosure Controls and Procedures: CMS Energy’s management, with the participation of its CEO and CFO, has evaluated the effectiveness of its disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based on such evaluation, CMS Energy’s CEO and CFO have concluded that, as of the end of such period, its disclosure controls and procedures are effective.

Internal Control Over Financial Reporting: There have not been any changes in CMS Energy’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the last fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

CONSUMERS

Disclosure Controls and Procedures: Consumers’ management, with the participation of its CEO and CFO, has evaluated the effectiveness of its disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based on such evaluation, Consumers’ CEO and CFO have concluded that, as of the end of such period, its disclosure controls and procedures are effective.

Internal Control Over Financial Reporting: There have not been any changes in Consumers’ internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the last fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

Part II—Other Information

Item 1.    Legal Proceedings

CMS Energy, Consumers, and certain of their affiliates are parties to various lawsuits and regulatory matters in the ordinary course of business. For information regarding material legal proceedings, including updates to information reported under Part I—Item 3. Legal Proceedings, of the 2016 Form 10-K, see Part I—Item 1. Financial Statements—Notes to the Unaudited Consolidated Financial Statements—Note 2, Regulatory Matters and Note 3, Contingencies and Commitments.

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Item 1A. Risk Factors

There have been no material changes to the Risk Factors as previously disclosed in Part I—Item 1A. Risk Factors, in the 2016 Form 10-K, which Risk Factors are incorporated herein by reference.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

UNREGISTERED SALES OF EQUITY SECURITIES

None.

ISSUER REPURCHASES OF EQUITY SECURITIES

Presented in the following table are CMS Energy’s repurchases of equity securities for the three months ended September 30, 2017:

Period	Total Number  of Shares  Purchased	1	Average  Price Paid  per Share		Total Number of  Shares Purchased as  Part of Publicly  Announced Plans or  Programs	Maximum Number of  Shares That May Yet Be  Purchased Under Publicly  Announced Plans or  Programs
July 1, 2017 to July 31, 2017	15,694		$	46.25	-	-
August 1, 2017 to August 31, 2017	154		46.64		-	-
September 1, 2017 to September 30, 2017	17		48.42		-	-
Total	15,865		$	46.26	-	-

1All of the common shares were repurchased to satisfy the minimum statutory income tax withholding obligation for common shares that have vested under the Performance Incentive Stock Plan. The value of shares repurchased is based on the market price on the vesting date.

Item 3.    Defaults Upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

Not applicable.

Item 5.    Other Information

None.

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Item 6.    Exhibits

CMS ENERGY’S AND CONSUMERS’ EXHIBIT INDEX

The agreements included as exhibits to this Form 10-Q filing are included solely to provide information regarding the terms of the agreements and are not intended to provide any other factual or disclosure information about CMS Energy, Consumers, or other parties to the agreements. The agreements may contain representations and warranties made by each of the parties to each of the agreements that were made exclusively for the benefit of the parties involved in each of the agreements and should not be treated as statements of fact. The representations and warranties were made as a way to allocate risk if one or more of those statements prove to be incorrect. The statements were qualified by disclosures of the parties to each of the agreements that may not be reflected in each of the agreements. The agreements may apply standards of materiality that are different than standards applied to other investors. Additionally, the statements were made as of the date of the agreements or as specified in the agreements and have not been updated. The representations and warranties may not describe the actual state of affairs of the parties to each agreement.

Additional information about CMS Energy and Consumers may be found in this filing, at www.cmsenergy.com, at www.consumersenergy.com, and through the SEC’s website at www.sec.gov.

Exhibits		Description
4.1	—	129th Supplemental Indenture dated as of September 28, 2017 between Consumers and The Bank of New York Mellon, as Trustee (Exhibit 4.1 to Form 8-K filed September 28, 2017 and incorporated herein by reference)
10.1	—	Bond Purchase Agreement between Consumers Energy and each of the Purchasers named therein (Exhibit 10.1 to Form 8-K filed August 29, 2017 and incorporated herein by reference)
10.21	—	Annual Employee Incentive Compensation Plan for Consumers as amended effective as of August 4, 2017
12.1	—	Statement regarding computation of CMS Energy’s Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends
12.2	—	Statement regarding computation of Consumers’ Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends
31.1	—	CMS Energy’s certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	—	CMS Energy’s certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.3	—	Consumers’ certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.4	—	Consumers’ certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	—	CMS Energy’s certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	—	Consumers’ certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	—	XBRL Instance Document
101.SCH	—	XBRL Taxonomy Extension Schema
101.CAL	—	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	—	XBRL Taxonomy Extension Definition Linkbase
101.LAB	—	XBRL Taxonomy Extension Labels Linkbase
101.PRE	—	XBRL Taxonomy Extension Presentation Linkbase

1Management contract or compensatory plan or arrangement.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. The signature for each undersigned company shall be deemed to relate only to matters having reference to such company or its subsidiary.

		CMS ENERGY CORPORATION
Dated: October 26, 2017	By:	/s/ Rejji P. Hayes
		Rejji P. Hayes
		Executive Vice President and Chief Financial Officer
		CONSUMERS ENERGY COMPANY
Dated: October 26, 2017	By:	/s/ Rejji P. Hayes
		Rejji P. Hayes
		Executive Vice President and Chief Financial Officer

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EXHIBITS

EX-10.2

Exhibit 10.2

ANNUAL EMPLOYEE INCENTIVE COMPENSATION

PLAN FOR CONSUMERS ENERGY COMPANY

ANNUAL EMPLOYEE INCENTIVE COMPENSATION

PLAN FOR CONSUMERS ENERGY COMPANY

I.GENERAL PROVISIONS

1.1Purpose.  The purpose of the Annual Employee Incentive Compensation Plan (“EICP” or “Plan”) is to provide an equitable and competitive level of compensation that will permit Consumers Energy Company (“Company”) and its subsidiaries to attract, retain and motivate their Employees.

1.2Effective Date.    The Plan as described herein is amended and restated effective as of March 14, 2014 and revised August 4, 2017.

1.3Eligibility.  Regular non-union U.S. employees who have received a performance rating of at least “Effective” (also known as “Meets Expectations” or “Satisfactory” or “Fully Contributing”) for the Performance Year as documented on their annual performance, evaluation, feedback and development appraisal are eligible for participation in the EICP.   Any regular non-union employee who has received a performance rating of less than “Effective” (also known as “Meets Expectations” or “Satisfactory” or “Fully Contributing”) or under-contributing (“U”) for the Performance Year as documented on their annual performance, evaluation, feedback and development appraisal is not eligible for participation in the EICP.

II.CORPORATE PERFORMANCE GOALS

Each year the President and CEO of CMS Energy Corporation will establish the Corporate Performance Goals (“Goals”) for the EICP.  The Goals will consist of between five and fifteen utility specific performance criteria relating to such items as customer service, safety and reliability.  When establishing the Goals for a Performance Year, the President and CEO will include the total number of criteria to be used for the year as well as the award percent for achievement of a specified number of the established criteria.  The specific Goals will be communicated to employees no later than March 31st of the Performance Year.  The Award Formula may include additional adjustments based on financial performance goals relating to CMS Energy Corporation as determined by the Compensation and Human Resources Committee of the Company Board of Directors (the “Committee”).

III.ANNUAL AWARD FORMULA

3.1Annual Awards.  Annual Awards for each eligible EICP participant will be based upon a standard award as set forth in the table below.  The total amount of a participant’s Annual Award shall be computed according to the annual award formula set forth in Section 3.2.  The Standard Award Amounts are subject to

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adjustment by the President and CEO of CMS Energy Corporation as indicated by market practices.

	Fulltime	Part time
	Standard	Standard
Salary	Award	Award
Grade	Amount	Amount
25	$18,500
24	$18,250
23	$11,250
22	$11,000
21	$6,750
20	$6,500
19	$6,250
18	$1,000	$500
17	$875	$438
16	$750	$375
15	$675	$338
14	$600	$300
13	$575	$288
12	$550	$275
11	$525	$263
10	$500	$250
9	$475	$238
8	$450	$225
7	$425	$213
6	$400	$200
5	$375	$188
4	$350	$175
3	$325	$163
2	$300	$150
1	$275	$138

3.2Annual Awards for EICP participants will be calculated and made as follows:

Annual Award = Standard Award Amount X Operational Award Level X 50% Plus Standard Target Amount X Financial Award Level X 50%

IV.PAYMENT OF ANNUAL AWARDS

4.1Cash Annual Award.  All Annual Awards for a Performance Year will be paid in cash no later than March 15th of the calendar year following the Performance Year provided that the Annual Award for a particular Performance Year has not been deferred voluntarily pursuant to Section 4.2.  The amounts required by law to be withheld for income and employment taxes will be deducted from the Annual Award payments.  All Annual Awards become the obligation of the company on whose payroll the Employee is enrolled at the time the Committee makes the Annual Award.

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4.2Deferred Annual Awards.

(a)The payment of all or any portion (rounded to an even multiple of 10%) of a cash Annual Award may be deferred voluntarily at the election of individual participants in salary grades 19-25.  Any such deferral will be net of any applicable FICA or FUTA taxes.  A separate irrevocable election must be made prior to the  Performance Year.  Any Annual Award made by the Committee after termination of employment of a participant or retirement of a participant will be paid in accordance with any deferral election made within the enrollment period.

(b)At the time the participant makes a deferral election he or she must select the payment options (including the Payment Event as set forth at (c) below and the Payment Term as set forth at (d) below) applicable to the Deferred Annual Award for the Performance Year, as well as any earnings or income attributable to such amounts.  The payment options elected will apply only to that year’s Deferred Annual Award and will not apply to any previous Deferred Annual Award or to any subsequent Deferred Annual Award.  Any participant who elects to defer all or a portion of an Annual Award and who fails to select a Payment Event or a Payment Term will be presumed to have elected a Payment Event of Separation from Service in accordance with paragraph (c)(i) below and/or a Payment Term of a single sum.

(c)The Payment Event elected can be either:

(i)Separation from Service for any reason other than death.  Payment will be made, or begin, in the later of: (1) January of the year following the year of the Separation from Service; or (2) the seventh month after the month of the Separation from Service.  Later installments, if any, will be paid in January of the succeeding years;

(ii)Payment upon attainment of a date certain that is more than 1 year after the last day of the applicable Performance Year.  Later installments, if any, will be paid in January of the succeeding years;

(iii)The first to occur of (i) or (ii) above; or

(iv)  The later of (i) or (ii) above.

(d)Payment Term.  At the time of electing to defer an Annual Award, the participant must also elect how he or she wishes to receive any such payment from among the following options (the participant may elect a separate Payment Term for each Payment Event elected):

(i)Payment in a single sum upon occurrence of the Payment Event.

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(ii)Payment of a series of annual installment payments over a period from two (2) years to fifteen (15) years following the Payment Event.  Each installment payment shall be equal to a fractional amount of the balance in the account the numerator of which is one and the denominator of which is the number of installment payments remaining.  Although initially such installment payments will be identical, actual payments may vary based upon investment performance.  For example, a series of 5 installment payments will result in a payout of 1/5 of the account balance in the first installment, ¼ of the account balance (including investment gains or losses since the first installment date) in the second installment, etc.

(e)Changes to Payment Options.  Once a payment option has been elected, subsequent changes which would accelerate the receipt of benefits from the Plan are not permitted, except that the Plan Administrator, which is the Benefit Administration Committee as defined in the Savings Plan for Employees of Consumers Energy and other CMS Energy Companies (the “Savings Plan”), may at its discretion accelerate payments to the extent permitted by Code Section 409A and applicable regulations.  A subsequent election to change the payment options related to a Payment Event, in order to delay a payment or to change the form of a payment, can only be made when all of the following conditions are satisfied:

(i)such election may not take effect until at least 12 months after the date on which the election is made;

(ii)the payment(s) with respect to which such election is made is deferred for a period of not less than 5 years from the date such payment would otherwise have been made (or, in the case of installment payments under Section 4.2(d)(ii) with regard to amounts deferred (and the related earnings) prior to January 1, 2016, 5 years from the date the first installment was scheduled to be paid); and

(iii)  such election must be made not less than 12 months before the date the payment was previously scheduled to be made (or, in the case of installment payments under Section 4.2(d)(ii) with regard to amounts deferred (and the related earnings) prior to January 1, 2016, 12 months before the first installment was scheduled to be paid), if the participant’s previous commencement date was a specified date.

Effective January 1, 2016, the right to a series of installment payments is to be treated as a right to a series of separate payments to the extent permissible under Code Section 409A and any applicable regulations.

(f)Investments. At the time of electing to voluntarily defer payment, the participant must elect how the Deferred Annual Award will be treated by the Company or Subsidiary.  To the extent that any amounts deferred are placed in

4

a rabbi trust with an independent record keeper, a participant who has previously deferred amounts under this Plan will automatically have his or her existing investment profile apply to this deferral also.  All determinations of the available investment options by the Plan Administrator are final and binding upon participants.  A participant may change the investment elections at any time prior to the payment of the benefit, subject to any restrictions imposed by the Plan Administrator, the plan record keeper or by any applicable laws and regulations.  A participant not making an election will have amounts deferred treated as if in a Lifestyle Fund as defined in the Savings Plan applicable to the participant’s age 65, rounded up, or such other investment as determined by the Plan Administrator.  All gains and losses will be based upon the performance of the investments selected by the participant from the date the deferral is first credited to the nominal account.  If the Company elects to fund its obligation as discussed below, then investment performance will be based on the balance as determined by the record keeper.

(g)The amount of any Deferred Annual Award is to be satisfied from the general corporate funds of the company on whose payroll the Plan participant was enrolled prior to the payout beginning and are subject to the claims of general creditors of the company.  This is an unfunded nonqualified deferred compensation plan.  To the extent the Company elects to place funds with a trustee to pay its future obligations under this Plan, such amounts are placed for the convenience of the Company or Subsidiary, remain the property of the Company or Subsidiary and the participant shall have no right to such funds until properly paid in accordance with the provisions of this Plan.  For administrative ease and convenience, such amounts may be referred to as participant accounts, but as such are a notional account only and are not the property of the participant.  Such amounts remain subject to the claims of the creditors of the Company or Subsidiary.

(h)Payment in the Event of an Unforeseeable Emergency. The participant may request that payments commence immediately upon the occurrence of an Unforeseeable Emergency as that term is defined in Code Section 409A and any applicable regulations.  Generally, an unforeseeable emergency is a severe financial hardship resulting from an illness or accident of the participant or the participant’s spouse or dependent, loss of the participant’s property due to casualty, or other similar extraordinary and unforeseeable circumstances arising as a result of events beyond the control of the participant.  A distribution on account of unforeseeable emergency may not be made to the extent that such emergency is or may be relieved through reimbursement or compensation from insurance or otherwise, by liquidation of the participant’s assets (without causing severe financial hardship), or by cessation of deferrals under this arrangement, the Savings Plan or other arrangements. Distributions because of an unforeseeable emergency shall not exceed the amount permitted under Section 409A and accordingly are limited to the amount reasonably necessary to satisfy the emergency need (after use of insurance proceeds, liquidation of

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assets, etc.) plus an amount to pay taxes reasonably anticipated as a result of the distribution. In the event any payment is made due to an unforeseeable emergency, all deferral elections for the current Performance Year will cease and the participant will not be eligible to make any deferral elections under this Plan for the following Performance Year.  For any participant receiving a hardship withdrawal under the Savings Plan, all deferral elections under this Plan for the current Performance Year will cease and the participant will not be eligible to make any deferral elections under this Plan for the following Performance Year.

4.3Payment in the Event of Death.

(a)A participant may name the beneficiary of his or her choice on a beneficiary form provided by the Company or record keeper, and the beneficiary shall receive, within 90 days of the participant’s death, in a single sum, all payments credited to the participant in the event that the participant dies prior to receipt of Deferred Annual Awards.  If a beneficiary is not named or does not survive the participant, the payment will be made to the participant’s estate. In no event may any recipient designate a year of payment for an amount payable upon the death of the participant.

(b)A participant may change beneficiaries at any time, and the change will be effective as of the date the plan record keeper or the Company accepts the form as complete.  The Company will not be liable for any payments made before receipt and acceptance of a written beneficiary request.

V.CHANGE OF STATUS

Payments in the event of a change in status will not be made if no Annual Awards are made for the Performance Year.

5.1Pro-Rata Annual Awards.  A new EICP participant, whether hired or promoted to the position, or an EICP employee promoted to a higher salary grade during the Performance Year will receive a pro rata Annual Award based on the percentage of the Performance Year in which the employee is in a particular salary grade.  An EICP participant whose salary grade has been lowered, but whose employment is not terminated during the Performance Year will receive a pro rata Annual Award based on the percentage of the Performance Year in which the employee is in a particular salary grade.  Awards will also be prorated for any change in full time or part time work status.

5.2Termination.  An EICP participant whose employment is terminated pursuant to a violation of the Company code of conduct or other corporate policies will not be considered for or receive an Annual Award.

5.3Resignation.  An EICP participant who resigns prior to payment (during or after a Performance Year) will not be eligible for an Annual Award.  If the resignation is

6

due to reasons such as a downsizing or reorganization, or the ill health of the employee or ill health in the immediate family, the employee may petition the Plan Administrator and may be considered, in the discretion of the Plan Administrator, for a pro rata Annual Award.  The Plan Administrator’s decision to approve or deny the request for a pro rata Annual Award shall be final.

5.4Death, Disability, Retirement, Leave of Absence.  An EICP participant whose status as an active employee is changed during the Performance Year due to death, Disability, Retirement, or Leave of Absence (as determined by the Plan Administrator) will receive a pro rata Annual Award.  An EICP participant whose employment is terminated following the Performance Year but prior to payment due to death, Disability or Retirement will continue to be eligible for an Annual Award for the Performance Year.  Any such payment or Annual Award payable due to the death of the EICP participant will be made to the named beneficiary, or if no beneficiary is named or if the beneficiary doesn’t survive the EICP participant, then to the EICP participant’s estate no later than March 15 following the applicable Performance Year.  Notwithstanding the above, an EICP participant who retires, is on disability or leave of absence and who becomes employed by a competitor of CMS Energy or Consumers Energy or their subsidiaries or affiliates prior to award payout will forfeit all rights to an Annual Award, unless prior approval of such employment has been granted by the Committee.  A “competitor” shall mean an entity engaged in the business of (1) selling (a) electric power or natural gas at retail or wholesale within the State of Michigan or (b) electric power at wholesale within the market area in which an electric generating plant owned by a subsidiary or affiliate of CMS Enterprises is located or (2) developing an electric generating plant within the State of Michigan or a market area in which an electric generating plant owned by a subsidiary.

5.5Payment Following Leave of Absence.  Payment of an award for an EICP participant who is on leave of absence or Family Medical Leave Act leave at the time of payment shall be delayed until the participant has returned to work and then shall be paid in the payroll period that is within an administratively reasonable time after returning to work, but no later than March 15 of the year following the year the participant has returned to work.

.

VI.MISCELLANEOUS

6.1Impact on Benefit Plans.  Payments made under the Plan will be considered as earnings for the Supplemental Executive Retirement Plans (Salary Grades 24 and 25) but not for purposes of the Employees’ Savings Plan, Pension Plan, or other employee benefit programs.

6.2Impact on Employment.  Neither the adoption of the Plan nor the granting of any Annual Award under the Plan will be deemed to create any right in any individual to

7

be retained or continued in the employment of the Company or any corporation within the Company’s control group.

6.3Termination or Amendment of the Plan.  The Company may amend or terminate the Plan at any time.  Upon termination, any Deferred Annual Award accrued under the Plan and vested will remain in the Plan and be paid out in accordance with the Payment Elections previously selected.  The Plan Administrator is authorized to make any amendments that are deemed necessary or desirable to comply with any applicable laws, regulations or orders or as may be advised by counsel or to clarify the terms and operation of the Plan.  The Company may terminate the Plan and accelerate any benefits under the Plan, at its discretion, if it acts consistent in all manners with the requirements of Code Section 409A and any applicable regulations with respect to when a terminated plan may accelerate payment to a participant.

6.4Governing Law.  The Plan will be governed and construed in accordance with the laws of the State of Michigan.

6.5Dispute Resolution.  Any disputes related to the Plan must be brought to the Plan Administrator.  The Plan Administrator is granted full discretionary authority to apply the terms of the Plan, make administrative rulings, interpret the Plan and make any other determinations with respect to the Plan.  If the Plan Administrator makes a determination and the participant disagrees with or wishes to appeal the determination, the participant must appeal the decision to the Plan Administrator, in writing and not later than 60 days from when the determination was mailed to the participant.  If the participant does not timely appeal the original determination, the participant has no further rights under the Plan with respect to the matter presented in the claim.  If the participant appeals the original determination and that appeal does not result in a mutually agreeable resolution, then the dispute shall be subject to final and binding arbitration before a single arbitrator selected by the parties to be conducted in Jackson, Michigan, provided the participant makes such request for arbitration in writing within 30 days of the final decision by the Plan Administrator.  The arbitration will be conducted and finished within 90 days of the selection of the arbitrator.  The parties shall share equally the cost of the arbitrator and of conducting the arbitration proceeding, but each party shall bear the cost of its own legal counsel and experts and other out-of-pocket expenditures.  The arbitrator must use an arbitrary and capricious standard of review when considering any determinations and findings by the Plan Administrator.

VII.AMENDMENT TO REFLECT CODE SECTION 409A

7.1Code Section 409A.  This Plan has been amended, effective as of January 1, 2005, to comply with the requirements of Section 409A of the Code.  To the extent counsel determines additional amendments may be reasonable or desirable in order to comply with Code Section 409A, and any other applicable rules, laws and regulations, such changes shall be authorized with the approval of the Plan Administrator.

8

EX-12.1

Exhibit 12.1

CMS Energy Corporation

Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends

	In Millions, Except Ratios
	Nine Months
	Ended			Year Ended December 31
	September 30, 2017			2016			2015			2014			2013			2012
Earnings as defined1
Pretax income from continuing operations	$	664		$	826		$	796		$	729		$	756		$	622
Exclude equity basis subsidiaries	(8		)	(2		)	(2		)	(1		)	(2		)	(7		)
Fixed charges as defined2	351			469			421			432			423			414
Earnings as defined2	$	1,007		$	1,293		$	1,215		$	1,160		$	1,177		$	1,029
Fixed charges as defined1
Interest on long-term debt	$	304		$	411		$	386		$	393		$	385		$	372
Estimated interest portion of lease rental	21			29			21			21			21			21
Other interest charges	27			31			16			19			18			23
Fixed charges as defined2	$	352		$	471		$	423		$	433		$	424		$	416
Preferred dividends	-			-			-			-			-			-
Combined fixed charges and preferred dividends	$	352		$	471		$	423		$	433		$	424		$	416
Ratio of earnings to fixed charges	2.86			2.75			2.87			2.68			2.78			2.47
Ratio of earnings to combined fixed charges and preferred dividends	2.86			2.75			2.87			2.68			2.78			2.47

1Earnings and fixed charges as defined in instructions for Item 503 of Regulation S-K.

2Preferred dividends of a consolidated subsidiary are included in fixed charges, but excluded from earnings as defined because the amount was not deducted in arriving at pretax income from continuing operations.

EX-12.2

Exhibit 12.2

Consumers Energy Company

Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends

In Millions, Except Ratios
	Nine Months
	Ended		Year Ended December 31
	September 30, 2017		2016		2015		2014		2013		2012
Earnings as defined1
Pretax income from continuing operations	$	712	$	936	$	896	$	873	$	880	$	736
Fixed charges as defined	230		302		275		274		269		269
Earnings as defined	$	942	$	1,238	$	1,171	$	1,147	$	1,149	$	1,005
Fixed charges as defined1
Interest on long-term debt	$	198	$	261	$	252	$	243	$	237	$	232
Estimated interest portion of lease rental	21		29		21		21		21		21
Other interest charges	11		12		2		10		11		16
Fixed charges as defined	230		302		275		274		269		269
Preferred dividends	2		3		3		3		3		3
Combined fixed charges and preferred dividends	$	232	$	305	$	278	$	277	$	272	$	272
Ratio of earnings to fixed charges	4.10		4.10		4.26		4.19		4.27		3.74
Ratio of earnings to combined fixed charges and preferred dividends	4.06		4.06		4.21		4.14		4.22		3.69

1Earnings and fixed charges as defined in instructions for Item 503 of Regulation S-K.

EX-31.1

Exhibit 31.1

CERTIFICATION OF PATRICIA K. POPPE

I, Patricia K. Poppe, certify that:

1.I have reviewed this quarterly report on Form 10-Q of CMS Energy Corporation;

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 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 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.

Dated: October 26, 2017	By:	/s/ Patricia K. Poppe
		Patricia K. Poppe
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF REJJI P. HAYES

I, Rejji P. Hayes, certify that:

1.I have reviewed this quarterly report on Form 10-Q of CMS Energy Corporation;

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 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 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.

Dated: October 26, 2017	By:	/s/ Rejji P. Hayes
		Rejji P. Hayes
		Executive Vice President and Chief Financial Officer

EX-31.3

Exhibit 31.3

CERTIFICATION OF PATRICIA K. POPPE

I, Patricia K. Poppe, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Consumers Energy Company;

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 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 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.

Dated: October 26, 2017	By:	/s/ Patricia K. Poppe
		Patricia K. Poppe
		President and Chief Executive Officer

EX-31.4

Exhibit 31.4

CERTIFICATION OF REJJI P. HAYES

I, Rejji P. Hayes, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Consumers Energy Company;

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 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 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.

Dated: October 26, 2017	By:	/s/ Rejji P. Hayes
		Rejji P. Hayes
		Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CEO AND CFO 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 Quarterly Report on Form 10-Q of CMS Energy Corporation (the “Company”) for the quarterly period ended September 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Patricia K. Poppe, as President and Chief Executive Officer of the Company, and Rejji P. Hayes, as Executive Vice President and Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his or her knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Patricia K. Poppe
Name:	Patricia K. Poppe
Title:	President and Chief Executive Officer
Date:	October 26, 2017
/s/ Rejji P. Hayes
Name:	Rejji P. Hayes
Title:	Executive Vice President and Chief Financial Officer
Date:	October 26, 2017

EX-32.2

Exhibit 32.2

CERTIFICATION OF CEO AND CFO 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 Quarterly Report on Form 10-Q of Consumers Energy Company (the “Company”) for the quarterly period ended September 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Patricia K. Poppe, as President and Chief Executive Officer of the Company, and Rejji P. Hayes, as Executive Vice President and Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his or her knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Patricia K. Poppe
Name:	Patricia K. Poppe
Title:	President and Chief Executive Officer
Date:	October 26, 2017
/s/ Rejji P. Hayes
Name:	Rejji P. Hayes
Title:	Executive Vice President and Chief Financial Officer
Date:	October 26, 2017

XML

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 10, 2017
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2017
Trading Symbol	cms
Entity Registrant Name	CMS Energy Corporation
Entity Central Index Key	0000811156
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
CMS Energy [Member]
Entity Common Stock, Shares Outstanding		282,083,585
Consumers Energy Company [Member]
Entity Registrant Name	Consumers Energy Company
Entity Central Index Key	0000201533
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		84,108,789

XML

Consolidated Statements Of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Revenue	$ 1,527	$ 1,587	$ 4,805	$ 4,759
Operating Expenses
Fuel for electric generation	144	145	386	367
Purchased and interchange power	426	454	1,132	1,165
Purchased power - related parties	21	22	64	65
Cost of gas sold	47	45	494	490
Maintenance and other operating expenses	304	301	909	890
Depreciation and amortization	193	183	652	597
General taxes	62	62	209	209
Total operating expenses	1,197	1,212	3,846	3,783
Operating Income	330	375	959	976
Other Income (Expense)
Interest income	3	1	10	4
Allowance for equity funds used during construction	1	3	5	9
Income from equity method investees	3	5	10	12
Nonoperating retirement benefits, net	3	11	10	31
Other income	2	2	4	7
Other expense	(2)	(6)	(6)	(13)
Total other income	10	16	33	50
Interest Charges
Interest on long-term debt	101	103	304	306
Other interest expense	10	8	26	22
Allowance for borrowed funds used during construction		(1)	(2)	(4)
Total interest charges	111	110	328	324
Income Before Income Taxes	229	281	664	702
Income Tax Expense	57	95	200	227
Net Income	172	186	464	475
Income Attributable to Noncontrolling Interests			1	1
Net Income Available to Common Stockholders	$ 172	$ 186	$ 463	$ 474
Basic Earnings Per Average Common Share	$ 0.61	$ 0.67	$ 1.65	$ 1.71
Diluted Earnings Per Average Common Share	0.61	0.67	1.65	1.70
Dividends Declared Per Common Share	$ 0.3325	$ 0.3100	$ 0.9975	$ 0.9300
Consumers Energy Company [Member]
Operating Revenue	$ 1,437	$ 1,498	$ 4,536	$ 4,514
Operating Expenses
Fuel for electric generation	115	118	304	290
Purchased and interchange power	424	445	1,124	1,148
Purchased power - related parties	23	23	67	66
Cost of gas sold	42	39	479	477
Maintenance and other operating expenses	274	274	824	816
Depreciation and amortization	191	182	646	592
General taxes	60	61	203	207
Total operating expenses	1,129	1,142	3,647	3,596
Operating Income	308	356	889	918
Other Income (Expense)
Interest income	2	1	8	3
Interest and dividend income - related parties				1
Allowance for equity funds used during construction	1	3	5	9
Nonoperating retirement benefits, net	3	9	8	28
Other income	1	2	15	7
Other expense	(2)	(6)	(6)	(13)
Total other income	5	9	30	35
Interest Charges
Interest on long-term debt	66	65	198	195
Other interest expense	4	3	11	9
Allowance for borrowed funds used during construction		(1)	(2)	(4)
Total interest charges	70	67	207	200
Income Before Income Taxes	243	298	712	753
Income Tax Expense	62	103	216	254
Net Income	181	195	496	499
Preferred Stock Dividends			1	1
Net Income Available to Common Stockholders	$ 181	$ 195	$ 495	$ 498

XML

Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income	$ 172	$ 186	$ 464	$ 475
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax		1	1	2
Amortization of prior service credit, net of tax				(1)
Investments
Unrealized gain (loss) on investments, net of tax	1	1	2	1
Other Comprehensive Income (Loss)	1	2	3	2
Comprehensive Income	173	188	467	477
Comprehensive Income Attributable to Noncontrolling Interest			1	1
Comprehensive Income Attributable to CMS Energy	173	188	466	476
Consumers Energy Company [Member]
Net Income	181	195	496	499
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax			1
Investments
Unrealized gain (loss) on investments, net of tax		(2)	2	3
Reclassification adjustments included in net income, net of tax			(8)
Other Comprehensive Income (Loss)		(2)	(5)	3
Comprehensive Income Attributable to CMS Energy	$ 181	$ 193	$ 491	$ 502

XML

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Amortization of net actuarial loss, tax	$ 1		$ 1
Amortization of prior service credit, tax
Unrealized gain (loss) on investments, tax expense (tax benefit)			1
Consumers Energy Company [Member]
Amortization of net actuarial loss, tax
Unrealized gain (loss) on investments, tax expense (tax benefit)		(1)	1	2
Reclassification adjustments included in net income, tax			$ (5)

XML

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities
Net Income	$ 464	$ 475
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	652	597
Deferred income taxes and investment tax credit	198	219
Other non-cash operating activities and reconciling adjustments	78	54
Cash provided by (used in) changes in assets and liabilities
Decrease (increase) in accounts and notes receivable and accrued revenue	185	51
Decrease (increase) in inventories	(161)	35
Increase (decrease) in accounts payable and accrued refunds	(6)	(24)
Other current and non-current assets and liabilities	(211)	(166)
Net cash provided by operating activities	1,199	1,241
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under capital lease)	(1,208)	(1,224)
Decrease (increase) in EnerBank notes receivable	(87)	(87)
Proceeds from the sale of EnerBank notes receivable	19
Cost to retire property and other investing activities	(78)	(87)
Net cash used in investing activities	(1,354)	(1,398)
Cash Flows from Financing Activities
Proceeds from issuance of debt	1,108	775
Issuance of common stock	80	69
Net increase (decrease) in EnerBank certificates of deposit	40	64
Payment of dividends on common and preferred stock	(282)	(260)
Retirement of long-term debt	(668)	(215)
Decrease in notes payable	(168)	(174)
Payment of capital lease obligations and other financing costs	(39)	(22)
Net cash provided by (used in) financing activities	71	237
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	(84)	80
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	257	288
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	173	368
Non-cash transactions
Capital expenditures not paid	153	159
Note receivable recorded for future refund of use taxes paid and capitalized		29
Consumers Energy Company [Member]
Cash Flows from Operating Activities
Net Income	496	499
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	646	592
Deferred income taxes and investment tax credit	204	220
Other non-cash operating activities and reconciling adjustments	71	45
Cash provided by (used in) changes in assets and liabilities
Decrease (increase) in accounts and notes receivable and accrued revenue	184	72
Decrease (increase) in inventories	(161)	35
Increase (decrease) in accounts payable and accrued refunds	(10)	(31)
Other current and non-current assets and liabilities	(221)	(144)
Net cash provided by operating activities	1,209	1,288
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under capital lease)	(1,196)	(1,214)
Cost to retire property and other investing activities	(82)	(87)
Net cash used in investing activities	(1,278)	(1,301)
Cash Flows from Financing Activities
Proceeds from issuance of debt	534	446
Stockholder contribution	450	275
Payment of dividends on common and preferred stock	(348)	(362)
Retirement of long-term debt	(443)	(185)
Decrease in notes payable	(168)	(174)
Payment of capital lease obligations and other financing costs	(23)	(8)
Net cash provided by (used in) financing activities	2	(8)
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	(67)	(21)
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	152	71
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	85	50
Non-cash transactions
Capital expenditures not paid	$ 140	145
Note receivable recorded for future refund of use taxes paid and capitalized		$ 29

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 142	$ 235
Restricted cash and cash equivalents	27	19
Accounts receivable and accrued revenue, less allowance	631	821
Notes receivable, less allowance	197	180
Notes receivable held for sale	31	39
Accounts receivable - related parties	12	12
Inventories at average cost
Gas in underground storage	584	446
Materials and supplies	126	119
Generating plant fuel stock	77	61
Deferred property taxes	157	250
Regulatory assets	19	17
Prepayments and other current assets	118	81
Total current assets	2,121	2,280
Plant, Property, and Equipment
Plant, property, and equipment, gross	21,966	21,010
Less accumulated depreciation and amortization	6,403	6,056
Plant, property, and equipment, net	15,563	14,954
Construction work in progress	881	761
Total plant, property, and equipment	16,444	15,715
Other Non-current Assets
Regulatory assets	2,038	2,091
Accounts and notes receivable	1,177	1,118
Investments	71	65
Other	269	353
Total other non-current assets	3,555	3,627
Total Assets	22,120	21,622
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	980	886
Notes payable	230	398
Accounts payable	624	598
Accounts payable - related parties	8	12
Accrued rate refunds	35	21
Accrued interest	79	98
Accrued taxes	90	348
Regulatory liabilities	85	95
Other current liabilities	130	199
Total current liabilities	2,261	2,655
Non-current Liabilities
Long-term debt	9,024	8,640
Non-current portion of capital leases and financing obligation	97	110
Regulatory liabilities	2,066	2,041
Postretirement benefits	760	789
Asset retirement obligations	443	447
Deferred investment tax credit	88	73
Deferred income taxes	2,501	2,287
Other non-current liabilities	308	290
Total non-current liabilities	15,287	14,677
Commitments and Contingencies (Notes 2 and 3)
Common stockholder's equity
Common stock	3	3
Other paid-in capital	5,013	4,916
Accumulated other comprehensive loss	(47)	(50)
Retained earnings (Accumulated deficit)	(434)	(616)
Total common stockholders' equity	4,535	4,253
Noncontrolling interests	37	37
Total equity	4,572	4,290
Total Liabilities and Equity	22,120	21,622
Consumers Energy Company [Member]
Current Assets
Cash and cash equivalents	55	131
Restricted cash and cash equivalents	27	19
Accounts receivable and accrued revenue, less allowance	612	800
Notes receivable, less allowance	30	29
Accounts receivable - related parties	2	9
Inventories at average cost
Gas in underground storage	584	446
Materials and supplies	121	114
Generating plant fuel stock	73	57
Deferred property taxes	157	250
Regulatory assets	19	17
Prepayments and other current assets	110	70
Total current assets	1,790	1,942
Plant, Property, and Equipment
Plant, property, and equipment, gross	21,784	20,838
Less accumulated depreciation and amortization	6,335	5,994
Plant, property, and equipment, net	15,449	14,844
Construction work in progress	877	759
Total plant, property, and equipment	16,326	15,603
Other Non-current Assets
Regulatory assets	2,038	2,091
Accounts and notes receivable	45	27
Investments	21	33
Other	160	250
Total other non-current assets	2,264	2,401
Total Assets	20,380	19,946
Current Liabilities
Current portion of long-term debt, capital leases, and financing obligation	464	397
Notes payable	230	398
Accounts payable	601	580
Accounts payable - related parties	12	18
Accrued rate refunds	35	21
Accrued interest	48	67
Accrued taxes	111	354
Regulatory liabilities	85	95
Other current liabilities	93	164
Total current liabilities	1,679	2,094
Non-current Liabilities
Long-term debt	5,275	5,253
Non-current portion of capital leases and financing obligation	97	110
Regulatory liabilities	2,066	2,041
Postretirement benefits	703	730
Asset retirement obligations	442	446
Deferred investment tax credit	88	73
Deferred income taxes	3,257	3,042
Other non-current liabilities	241	218
Total non-current liabilities	12,169	11,913
Commitments and Contingencies (Notes 2 and 3)
Common stockholder's equity
Common stock	841	841
Other paid-in capital	4,449	3,999
Accumulated other comprehensive loss	(8)	(3)
Retained earnings (Accumulated deficit)	1,213	1,065
Total common stockholders' equity	6,495	5,902
Preferred stock	37	37
Total equity	6,532	5,939
Total Liabilities and Equity	$ 20,380	$ 19,946

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Allowances for doubtful accounts receivable	$ 22	$ 24
Allowances for doubtful notes receivable	$ 19	$ 16
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares outstanding	281,600,000	279,200,000
Consumers Energy Company [Member]
Allowances for doubtful accounts receivable	$ 22	$ 24
Common stock, shares authorized	125,000,000	125,000,000
Common stock, shares outstanding	84,100,000	84,100,000

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Consolidated Statements Of Changes In Equity - USD ($) $ in Millions	Consumers Energy Company [Member] CMS Energy Common Stock [Member]	Consumers Energy Company [Member] Other Paid-in Capital [Member]	Consumers Energy Company [Member] Accumulated Other Comprehensive (Loss) [Member]	Consumers Energy Company [Member] Retirement Benefits Liability [Member]	Consumers Energy Company [Member] Investments [Member]	Consumers Energy Company [Member] Retained Earnings (Accumulated Deficit) [Member]	Consumers Energy Company [Member] Preferred Stock [Member]	Consumers Energy Company [Member]	CMS Energy Common Stock [Member]	Other Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) [Member]	Retirement Benefits Liability [Member]	Investments [Member]	Retained Earnings (Accumulated Deficit) [Member]	Noncontrolling Interest [Member]	Total
Cumulative effect of change in accounting principle														$ 33
Total Equity, beginning at Dec. 31, 2015	$ 841	$ 3,724	$ (6)	$ (19)	$ 13	$ 950	$ 37	$ 5,546	$ 3	$ 4,837	$ (47)	$ (43)	$ (4)	(855)	$ 37	$ 3,975
Common stock issued										82
Common stock repurchased										(11)
Common stock reissued
Stockholder contribution		275
Amortization of net actuarial loss												2				2
Amortization of prior service credit												(1)				(1)
Unrealized gain (loss) on investments					3			3					1			1
Reclassification adjustments included in net income, net of tax
Net income (loss) attributable to CMS Energy														474		474
Net Income						499		499								475
Dividends declared on common stock						(361)								(259)
Dividends declared on preferred stock						(1)
Income Attributable to Noncontrolling Interests															1	1
Distributions, and other changes in noncontrolling interests															(1)
Total Equity, end at Sep. 30, 2016	841	3,999	(3)	(19)	16	1,087	37	5,961	3	4,908	(45)	(42)	(3)	(607)	37	4,296
Total Equity, beginning at Jun. 30, 2016	841	3,999	(1)	(19)	18	1,040	37	5,916	3	4,906	(47)	(43)	(4)	(706)	37	4,193
Common stock issued										3
Common stock repurchased										(1)
Common stock reissued
Stockholder contribution
Amortization of net actuarial loss												1				1
Amortization of prior service credit
Unrealized gain (loss) on investments					(2)			(2)					1			1
Reclassification adjustments included in net income, net of tax
Net income (loss) attributable to CMS Energy														186		186
Net Income						195		195								186
Dividends declared on common stock						(148)								(87)
Distributions, and other changes in noncontrolling interests
Total Equity, end at Sep. 30, 2016	841	3,999	(3)	(19)	16	1,087	37	5,961	3	4,908	(45)	(42)	(3)	(607)	37	4,296
Total Equity, beginning at Dec. 31, 2016	841	3,999	(3)	(21)	18	1,065	37	5,939	3	4,916	(50)	(50)		(616)	37	4,290
Common stock issued										95
Common stock repurchased										(13)
Common stock reissued										15
Stockholder contribution		450
Amortization of net actuarial loss				1				1				1				1
Amortization of prior service credit
Unrealized gain (loss) on investments					2			2					2			2
Reclassification adjustments included in net income, net of tax					(8)			(8)
Net income (loss) attributable to CMS Energy														463		463
Net Income						496		496								464
Dividends declared on common stock						(347)								(281)
Dividends declared on preferred stock						(1)
Income Attributable to Noncontrolling Interests															1	1
Distributions, and other changes in noncontrolling interests															(1)
Total Equity, end at Sep. 30, 2017	841	4,449	(8)	(20)	12	1,213	37	6,532	3	5,013	(47)	(49)	2	(434)	37	4,572
Total Equity, beginning at Jun. 30, 2017	841	4,449	(8)	(20)	12	1,143	37	6,462	3	5,006	(48)	(49)	1	(512)	37	4,486
Common stock issued										7
Common stock repurchased
Common stock reissued
Stockholder contribution
Amortization of net actuarial loss
Amortization of prior service credit
Unrealized gain (loss) on investments													1			1
Reclassification adjustments included in net income, net of tax
Net income (loss) attributable to CMS Energy														172		172
Net Income						181		181								172
Dividends declared on common stock						(111)								(94)
Distributions, and other changes in noncontrolling interests
Total Equity, end at Sep. 30, 2017	$ 841	$ 4,449	$ (8)	$ (20)	$ 12	$ 1,213	$ 37	$ 6,532	$ 3	$ 5,013	$ (47)	$ (49)	$ 2	$ (434)	$ 37	$ 4,572

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New Accounting Standards

9 Months Ended

Sep. 30, 2017

New Accounting Standards

1:New Accounting Standards

Implementation of New Accounting Standards

ASU 2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost:This standard was issued to improve the reporting of net benefit cost by employers that offer defined benefit pension plans and other postretirement benefit plans. The required effective date of the standard for CMS Energy and Consumers is January 1, 2018, but early adoption was permitted in the first interim period of 2017. CMS Energy and Consumers elected to adopt the standard as of January 1, 2017. The standard requires employers to report the service cost component of net benefit cost in the same line item on the income statement as other employee compensation costs, while presenting the other cost components separately outside of operating income. This change is to be applied retrospectively to all prior periods presented. Accordingly, for the three months and nine months ended September 30, 2017 and 2016, CMS Energy and Consumers have presented the service cost component of their retirement benefits plans in maintenance and other operating expenses on the consolidated statements of income, while presenting the other components in nonoperating retirement benefits, net, under other income (expense). Prior to this standard, CMS Energy and Consumers had presented all of the cost components in maintenance and other operating expenses. Under a practical expedient permitted by the standard, CMS Energy and Consumers used benefit cost amounts disclosed for prior periods as the basis for retrospective application.

In addition, under this standard, only the service cost component is eligible for capitalization as part of the cost of an asset.  This change is to be applied prospectively upon adoption. Accordingly, for the three months and nine months ended September 30, 2017, CMS Energy and Consumers capitalized a portion of the service cost component of their retirement benefits plans to plant, property, and equipment, while recognizing the other components in net income. In prior periods, a portion of all cost components was capitalized.  For further details on the net periodic cost of CMS Energy’s and Consumers’ retirement benefits plans, see Note 8, Retirement Benefits. The implementation of this standard did not have a material impact on CMS Energy’s or Consumers’ consolidated net income, cash flows, or financial position.

New Accounting Standards Not Yet Effective

ASU 2014‑09, Revenue from Contracts with Customers: This standard provides new guidance for recognizing revenue from contracts with customers. A primary objective of the standard is to provide a single, comprehensive revenue recognition model that will be applied across entities, industries, and capital markets. The new guidance will replace most of the existing revenue recognition requirements in GAAP, although certain guidance specific to rate-regulated utilities will be retained. The standard will be effective on January 1, 2018 for CMS Energy and Consumers, but early adoption in 2017 is permitted. Entities will have the option to apply the standard retrospectively to all prior periods presented, or to apply it retrospectively only to contracts existing at the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings. CMS Energy and Consumers are not adopting the standard early, and will apply the standard retrospectively only to contracts existing on the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings.

CMS Energy and Consumers are continuing to evaluate the standard; however, they do not expect that it will have a material impact on their consolidated net income, cash flows, or financial position. CMS Energy and Consumers will provide additional disclosures about their revenues in accordance with the new standard, but they have not yet identified any significant changes in their revenue recognition practices that may be required.

ASU 2016‑01, Recognition and Measurement of Financial Assets and Financial Liabilities: This standard, which will be effective January 1, 2018 for CMS Energy and Consumers, is intended to improve the accounting for financial instruments. The standard will require investments in equity securities to be measured at fair value, with changes in fair value recognized in net income, except for certain investments such as those that qualify for equity-method accounting. The standard will no longer permit unrealized gains and losses for certain equity investments to be recorded in AOCI. CMS Energy and Consumers presently record unrealized gains and losses on certain equity investments, including the mutual funds in the DB SERP and Consumers’ investment in CMS Energy common stock, in AOCI, except that unrealized losses determined to be other than temporary are reported in earnings. For further details on these investments, see Note 6, Financial Instruments. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded to beginning retained earnings on the effective date.

ASU 2016‑02, Leases: This standard establishes a new accounting model for leases. The standard will require entities to recognize lease assets and liabilities on the balance sheet for all leases with a term of more than one year, including operating leases, which are not recorded on the balance sheet under existing standards. As a result, CMS Energy and Consumers expect to recognize additional lease assets and liabilities for their operating leases under this standard. The new guidance will also amend the definition of a lease to require that a lessee control the use of a specified asset, and not simply control or take the output of the asset. On the income statement, leases that meet existing capital lease criteria will generally be accounted for under a financing model, while operating leases will generally be accounted for under a straight-line expense model. The standard will be effective on January 1, 2019 for CMS Energy and Consumers, but early adoption is permitted. CMS Energy and Consumers are continuing to evaluate the impact of the standard on their consolidated financial statements and do not presently expect to adopt the standard early.

ASU 2016‑13, Measurement of Credit Losses on Financial Instruments: This standard, which will be effective January 1, 2020 for CMS Energy and Consumers, provides new guidance for estimating and recording credit losses on financial instruments. The standard will apply to the recognition of loan losses at EnerBank as well as to the recognition of uncollectible accounts expense at Consumers. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded to beginning retained earnings on the effective date. CMS Energy and Consumers are evaluating the impact of the standard on their consolidated financial statements.

Consumers Energy Company [Member]

New Accounting Standards

1:New Accounting Standards

Implementation of New Accounting Standards

ASU 2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost:This standard was issued to improve the reporting of net benefit cost by employers that offer defined benefit pension plans and other postretirement benefit plans. The required effective date of the standard for CMS Energy and Consumers is January 1, 2018, but early adoption was permitted in the first interim period of 2017. CMS Energy and Consumers elected to adopt the standard as of January 1, 2017. The standard requires employers to report the service cost component of net benefit cost in the same line item on the income statement as other employee compensation costs, while presenting the other cost components separately outside of operating income. This change is to be applied retrospectively to all prior periods presented. Accordingly, for the three months and nine months ended September 30, 2017 and 2016, CMS Energy and Consumers have presented the service cost component of their retirement benefits plans in maintenance and other operating expenses on the consolidated statements of income, while presenting the other components in nonoperating retirement benefits, net, under other income (expense). Prior to this standard, CMS Energy and Consumers had presented all of the cost components in maintenance and other operating expenses. Under a practical expedient permitted by the standard, CMS Energy and Consumers used benefit cost amounts disclosed for prior periods as the basis for retrospective application.

In addition, under this standard, only the service cost component is eligible for capitalization as part of the cost of an asset.  This change is to be applied prospectively upon adoption. Accordingly, for the three months and nine months ended September 30, 2017, CMS Energy and Consumers capitalized a portion of the service cost component of their retirement benefits plans to plant, property, and equipment, while recognizing the other components in net income. In prior periods, a portion of all cost components was capitalized.  For further details on the net periodic cost of CMS Energy’s and Consumers’ retirement benefits plans, see Note 8, Retirement Benefits. The implementation of this standard did not have a material impact on CMS Energy’s or Consumers’ consolidated net income, cash flows, or financial position.

New Accounting Standards Not Yet Effective

ASU 2014‑09, Revenue from Contracts with Customers: This standard provides new guidance for recognizing revenue from contracts with customers. A primary objective of the standard is to provide a single, comprehensive revenue recognition model that will be applied across entities, industries, and capital markets. The new guidance will replace most of the existing revenue recognition requirements in GAAP, although certain guidance specific to rate-regulated utilities will be retained. The standard will be effective on January 1, 2018 for CMS Energy and Consumers, but early adoption in 2017 is permitted. Entities will have the option to apply the standard retrospectively to all prior periods presented, or to apply it retrospectively only to contracts existing at the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings. CMS Energy and Consumers are not adopting the standard early, and will apply the standard retrospectively only to contracts existing on the effective date, with the cumulative effect of the standard recorded as an adjustment to beginning retained earnings.

CMS Energy and Consumers are continuing to evaluate the standard; however, they do not expect that it will have a material impact on their consolidated net income, cash flows, or financial position. CMS Energy and Consumers will provide additional disclosures about their revenues in accordance with the new standard, but they have not yet identified any significant changes in their revenue recognition practices that may be required.

ASU 2016‑01, Recognition and Measurement of Financial Assets and Financial Liabilities: This standard, which will be effective January 1, 2018 for CMS Energy and Consumers, is intended to improve the accounting for financial instruments. The standard will require investments in equity securities to be measured at fair value, with changes in fair value recognized in net income, except for certain investments such as those that qualify for equity-method accounting. The standard will no longer permit unrealized gains and losses for certain equity investments to be recorded in AOCI. CMS Energy and Consumers presently record unrealized gains and losses on certain equity investments, including the mutual funds in the DB SERP and Consumers’ investment in CMS Energy common stock, in AOCI, except that unrealized losses determined to be other than temporary are reported in earnings. For further details on these investments, see Note 6, Financial Instruments. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded to beginning retained earnings on the effective date.

ASU 2016‑02, Leases: This standard establishes a new accounting model for leases. The standard will require entities to recognize lease assets and liabilities on the balance sheet for all leases with a term of more than one year, including operating leases, which are not recorded on the balance sheet under existing standards. As a result, CMS Energy and Consumers expect to recognize additional lease assets and liabilities for their operating leases under this standard. The new guidance will also amend the definition of a lease to require that a lessee control the use of a specified asset, and not simply control or take the output of the asset. On the income statement, leases that meet existing capital lease criteria will generally be accounted for under a financing model, while operating leases will generally be accounted for under a straight-line expense model. The standard will be effective on January 1, 2019 for CMS Energy and Consumers, but early adoption is permitted. CMS Energy and Consumers are continuing to evaluate the impact of the standard on their consolidated financial statements and do not presently expect to adopt the standard early.

ASU 2016‑13, Measurement of Credit Losses on Financial Instruments: This standard, which will be effective January 1, 2020 for CMS Energy and Consumers, provides new guidance for estimating and recording credit losses on financial instruments. The standard will apply to the recognition of loan losses at EnerBank as well as to the recognition of uncollectible accounts expense at Consumers. Entities will apply the standard using a modified retrospective approach, with a cumulative-effect adjustment recorded to beginning retained earnings on the effective date. CMS Energy and Consumers are evaluating the impact of the standard on their consolidated financial statements.

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Regulatory Matters

9 Months Ended

Sep. 30, 2017

Regulatory Matters

2:Regulatory Matters

Regulatory matters are critical to Consumers. The Michigan Attorney General, ABATE, the MPSC Staff, and certain other parties typically participate in MPSC proceedings concerning Consumers, such as Consumers’ rate cases and PSCR and GCR processes. These parties often challenge various aspects of those proceedings, including the prudence of Consumers’ policies and practices, and seek cost disallowances and other relief. The parties also have appealed significant MPSC orders. Depending upon the specific issues, the outcomes of rate cases and proceedings, including judicial proceedings challenging MPSC orders or other actions, could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. Consumers cannot predict the outcome of these proceedings.

There are multiple appeals pending that involve various issues concerning cost recovery from customers, the adequacy of the record evidence supporting the recovery of Smart Energy investments, and other matters. Consumers is unable to predict the outcome of these appeals.

Electric Rate Case: In March 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $225 million, based on a 10.7 percent authorized return on equity. In September 2016, Consumers self‑implemented an annual rate increase of $170 million, subject to refund with interest. The MPSC issued an order in February 2017, authorizing an annual rate increase of $113 million, based on a 10.1 percent authorized return on equity.

In May 2017, Consumers filed a reconciliation of total revenues collected during self-implementation to those that would have been collected under final rates. The reconciliation indicated that a refund would be required, and Consumers had a $17 million recorded reserve for customer refunds at September 30, 2017. In October 2017, the MPSC approved a settlement agreement that will result in a $17 million refund to customers during December 2017.

Gas Rate Case: In August 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $90 million, based on a 10.6 percent authorized return on equity. Consumers later reduced its requested annual rate increase to $80 million. In January 2017, Consumers self-implemented an annual rate increase of $20 million.  

The MPSC issued an order in July 2017, authorizing an annual rate increase of $29 million beginning in August 2017. The MPSC also approved an investment recovery mechanism that will provide for additional annual rate increases of $18 million beginning in 2018 and another $18 million beginning in 2019 for incremental investments that Consumers plans to make in those years, subject to reconciliation. These future investments are intended to help ensure adequate system capacity, deliverability, and safety. The investment recovery surcharge will remain in effect until rates are reset in a subsequent general rate case.

Energy Optimization Plan Incentive: In September 2017, the MPSC approved a settlement agreement authorizing Consumers to collect $18 million during 2018 as an incentive for exceeding its statutory savings targets in 2016. Consumers recognized incentive revenue under this program of $18 million in 2016.

Depreciation Rate Case: In August 2016, Consumers filed a depreciation rate case related to its gas utility property, requesting to decrease depreciation expense by $3 million annually. In March 2017, the MPSC approved a settlement agreement authorizing the requested decrease in depreciation expense effective as of January 2017.

FERC Transmission Order: In September 2016, FERC issued an order reducing the rate of return on equity earned by transmission owners operating within MISO to a base of 10.32 percent from 12.38 percent. FERC ordered MISO and transmission owners to provide refunds, with interest, to transmission customers such as Consumers for the period from November 2013 through February 2015. In February 2017, as a result of this order, Consumers received from MISO a credit of $28 million, which it will return to its electric customers through the PSCR ratemaking process. The FERC order is subject to further legal proceedings and Consumers’ MISO credit may be adjusted accordingly.  

Consumers Energy Company [Member]

Regulatory Matters

2:Regulatory Matters

Regulatory matters are critical to Consumers. The Michigan Attorney General, ABATE, the MPSC Staff, and certain other parties typically participate in MPSC proceedings concerning Consumers, such as Consumers’ rate cases and PSCR and GCR processes. These parties often challenge various aspects of those proceedings, including the prudence of Consumers’ policies and practices, and seek cost disallowances and other relief. The parties also have appealed significant MPSC orders. Depending upon the specific issues, the outcomes of rate cases and proceedings, including judicial proceedings challenging MPSC orders or other actions, could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. Consumers cannot predict the outcome of these proceedings.

There are multiple appeals pending that involve various issues concerning cost recovery from customers, the adequacy of the record evidence supporting the recovery of Smart Energy investments, and other matters. Consumers is unable to predict the outcome of these appeals.

Electric Rate Case: In March 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $225 million, based on a 10.7 percent authorized return on equity. In September 2016, Consumers self‑implemented an annual rate increase of $170 million, subject to refund with interest. The MPSC issued an order in February 2017, authorizing an annual rate increase of $113 million, based on a 10.1 percent authorized return on equity.

In May 2017, Consumers filed a reconciliation of total revenues collected during self-implementation to those that would have been collected under final rates. The reconciliation indicated that a refund would be required, and Consumers had a $17 million recorded reserve for customer refunds at September 30, 2017. In October 2017, the MPSC approved a settlement agreement that will result in a $17 million refund to customers during December 2017.

Gas Rate Case: In August 2016, Consumers filed an application with the MPSC seeking an annual rate increase of $90 million, based on a 10.6 percent authorized return on equity. Consumers later reduced its requested annual rate increase to $80 million. In January 2017, Consumers self-implemented an annual rate increase of $20 million.  

The MPSC issued an order in July 2017, authorizing an annual rate increase of $29 million beginning in August 2017. The MPSC also approved an investment recovery mechanism that will provide for additional annual rate increases of $18 million beginning in 2018 and another $18 million beginning in 2019 for incremental investments that Consumers plans to make in those years, subject to reconciliation. These future investments are intended to help ensure adequate system capacity, deliverability, and safety. The investment recovery surcharge will remain in effect until rates are reset in a subsequent general rate case.

Energy Optimization Plan Incentive: In September 2017, the MPSC approved a settlement agreement authorizing Consumers to collect $18 million during 2018 as an incentive for exceeding its statutory savings targets in 2016. Consumers recognized incentive revenue under this program of $18 million in 2016.

Depreciation Rate Case: In August 2016, Consumers filed a depreciation rate case related to its gas utility property, requesting to decrease depreciation expense by $3 million annually. In March 2017, the MPSC approved a settlement agreement authorizing the requested decrease in depreciation expense effective as of January 2017.

FERC Transmission Order: In September 2016, FERC issued an order reducing the rate of return on equity earned by transmission owners operating within MISO to a base of 10.32 percent from 12.38 percent. FERC ordered MISO and transmission owners to provide refunds, with interest, to transmission customers such as Consumers for the period from November 2013 through February 2015. In February 2017, as a result of this order, Consumers received from MISO a credit of $28 million, which it will return to its electric customers through the PSCR ratemaking process. The FERC order is subject to further legal proceedings and Consumers’ MISO credit may be adjusted accordingly.  

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Contingencies And Commitments

9 Months Ended

Sep. 30, 2017

Contingencies And Commitments

3:Contingencies and Commitments

CMS Energy and Consumers are involved in various matters that give rise to contingent liabilities. Depending on the specific issues, the resolution of these contingencies could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. In their disclosures of these matters, CMS Energy and Consumers provide an estimate of the possible loss or range of loss when such an estimate can be made. Disclosures that state that CMS Energy or Consumers cannot predict the outcome of a matter indicate that they are unable to estimate a possible loss or range of loss for the matter.

CMS Energy Contingencies

Gas Index Price Reporting Litigation: CMS Energy, along with CMS MST, CMS Field Services, Cantera Natural Gas, Inc., and Cantera Gas Company, have been named as defendants in four class action lawsuits and one individual lawsuit arising as a result of alleged inaccurate natural gas price reporting to publications that report trade information. Allegations include price-fixing conspiracies, restraint of trade, and artificial inflation of natural gas retail prices in Kansas, Missouri, and Wisconsin. Plaintiffs are making claims for the following: treble damages, full consideration damages, exemplary damages, costs, interest, and/or attorneys’ fees.

After removal to federal court, all of the cases were transferred to a single federal district court pursuant to the multidistrict litigation process. In 2010 and 2011, all claims against CMS Energy defendants were dismissed by the district court based on FERC preemption. In 2013, the U.S. Court of Appeals for the Ninth Circuit reversed the district court decision. The appellate court found that FERC preemption does not apply under the facts of these cases. The appellate court affirmed the district court’s denial of leave to amend to add federal antitrust claims. The matter was appealed to the U.S. Supreme Court, which in 2015 upheld the Ninth Circuit’s decision. The cases were remanded back to the federal district court.

In May 2016, the federal district court granted the defendants’ motion for summary judgment in the individual lawsuit based on a release in a prior settlement involving similar allegations and reinstated CMS Energy as a defendant in one of the class action lawsuits. The order of summary judgment has been appealed.

In December 2016, CMS Energy entities reached a settlement with the plaintiffs in the three Kansas and Missouri cases for an amount that was not material to CMS Energy. In August 2017, the federal district court approved the settlement.

CMS Energy entities remain as defendants in the Wisconsin class action lawsuits. In March2017, the federal district court denied plaintiffs’ motion for class certification. The plaintiffs appealed that decision to the U.S. Court of Appeals for the Ninth Circuit, which has accepted the matter for hearing. In June 2017, an unaffiliated company that is also a defendant in these cases filed for bankruptcy, which could increase the risk of loss to CMS Energy.

These cases involve complex facts, a large number of similarly situated defendants with different factual positions, and multiple jurisdictions. Presently, any estimate of liability would be highly speculative; the amount of CMS Energy’s reasonably possible loss would be based on widely varying models previously untested in this context. If the outcome after appeals is unfavorable, these cases could negatively affect CMS Energy’s liquidity, financial condition, and results of operations.

Bay Harbor: CMS Land retained environmental remediation obligations for the collection and treatment of leachate, a liquid consisting of water and other substances, at Bay Harbor after selling its interests in the development in 2002. Leachate is produced when water enters into cement kiln dust piles left over from former cement plant operations at the site. In 2012, CMS Land and the MDEQ finalized an agreement that established the final remedies and the future water quality criteria at the site. CMS Land completed all construction necessary to implement the remedies required by the agreement and will continue to maintain and operate a system to discharge treated leachate into Little Traverse Bay under an NPDES permit issued in 2010 and renewed in October 2016. The renewed NPDES permit is valid through September 2020.

Various claims have been brought against CMS Land or its affiliates, including CMS Energy, alleging environmental damage to property, loss of property value, insufficient disclosure of environmental matters, breach of agreement relating to access, or other matters. CMS Land and other parties have received a demand for payment from the EPA in the amount of $8 million, plus interest. The EPA is seeking recovery under CERCLA of response costs allegedly incurred at Bay Harbor. These costs exceed what was agreed to in a 2005 order between CMS Land and the EPA, and CMS Land has communicated to the EPA that it does not believe that this is a valid claim. The EPA has filed a lawsuit to collect these costs.

At September 30, 2017, CMS Energy had a recorded liability of $49 million for its remaining obligations for environmental remediation. CMS Energy calculated this liability based on discounted projected costs, using a discount rate of 4.34 percent and an inflation rate of one percent on annual operating and maintenance costs. The undiscounted amount of the remaining obligation is $62 million. CMS Energy expects to pay the following amounts for long-term liquid disposal and operating and maintenance costs during the remainder of 2017 and in each of the next five years:

In Millions
	2017			2018			2019			2020			2021			2022
CMS Energy
Long-term liquid disposal and operating and maintenance costs		$	1		$	4		$	4		$	4		$	4		$	4

CMS Energy’s estimate of response activity costs and the timing of expenditures could change if there are changes in circumstances or assumptions used in calculating the liability. Although a liability for its present estimate of remaining response activity costs has been recorded, CMS Energy cannot predict the ultimate financial impact or outcome of this matter.

Equatorial Guinea Tax Claim: In 2002, CMS Energy sold its oil, gas, and methanol investments in Equatorial Guinea. The government of Equatorial Guinea claims that, in connection with the sale, CMS Energy owes $152 million in taxes, plus substantial penalties and interest that could be up to the amount of the taxes claimed. The matter is proceeding to formal arbitration. CMS Energy has concluded that the government’s tax claim is without merit and is contesting the claim, but cannot predict the financial impact or outcome of the matter. An unfavorable outcome could have a material adverse effect on CMS Energy’s liquidity, financial condition, and results of operations.

Consumers Electric Utility Contingencies

Electric Environmental Matters: Consumers’ operations are subject to environmental laws and regulations. Historically, Consumers has generally been able to recover, in customer rates, the costs to operate its facilities in compliance with these laws and regulations.

Cleanup and Solid Waste: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. Consumers believes that these costs should be recoverable in rates, but cannot guarantee that outcome. Consumers estimates that its liability for NREPA sites for which it can estimate a range of loss will be between $3 million and $4 million. At September 30, 2017, Consumers had a recorded liability of $3 million, the minimum amount in the range of its estimated probable NREPA liability, as no amount in the range was considered a better estimate than any other amount.

Consumers is a potentially responsible party at a number of contaminated sites administered under CERCLA. CERCLA liability is joint and several. In 2010, Consumers received official notification from the EPA that identified Consumers as a potentially responsible party for cleanup of PCBs at the Kalamazoo River CERCLA site. The notification claimed that the EPA has reason to believe that Consumers disposed of PCBs and arranged for the disposal and treatment of PCB-containing materials at portions of the site. In 2011, Consumers received a follow‑up letter from the EPA requesting that Consumers agree to participate in a removal action plan along with several other companies for an area of lower Portage Creek, which is connected to the Kalamazoo River. All parties, including Consumers, that were asked to participate in the removal action plan declined to accept liability. Until further information is received from the EPA, Consumers is unable to estimate a range of potential liability for cleanup of the river.

Based on its experience, Consumers estimates that its share of the total liability for known CERCLA sites will be between $3 million and $8 million. Various factors, including the number and creditworthiness of potentially responsible parties involved with each site, affect Consumers’ share of the total liability. At September 30, 2017, Consumers had a recorded liability of $3 million for its share of the total liability at these sites, the minimum amount in the range of its estimated probable CERCLA liability, as no amount in the range was considered a better estimate than any other amount.

The timing of payments related to Consumers’ remediation and other response activities at its CERCLA and NREPA sites is uncertain. Consumers periodically reviews these cost estimates. A change in the underlying assumptions, such as an increase in the number of sites, different remediation techniques, the nature and extent of contamination, and legal and regulatory requirements, could affect its estimates of NREPA and CERCLA liability.

Ludington PCB: In 1998, during routine maintenance activities, Consumers identified PCB as a component in certain paint, grout, and sealant materials at Ludington. Consumers removed part of the PCB material and replaced it with non‑PCB material. Consumers has had several communications with the EPA regarding this matter, but cannot predict the financial impact or outcome.

Consumers Gas Utility Contingencies

Gas Environmental Matters: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. These sites include 23 former MGP facilities. Consumers operated the facilities on these sites for some part of their operating lives. For some of these sites, Consumers has no present ownership interest or may own only a portion of the original site.

At September 30, 2017, Consumers had a recorded liability of $93 million for its remaining obligations for these sites. This amount represents the present value of long-term projected costs, using a discount rate of 2.57 percent and an inflation rate of 2.5 percent. The undiscounted amount of the remaining obligation is $104 million. Consumers expects to pay the following amounts for remediation and other response activity costs during the remainder of 2017 and in each of the next five years:

In Millions
	2017			2018			2019			2020			2021			2022
Consumers
Remediation and other response activity costs		$	8		$	16		$	18		$	10		$	18		$	7

Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, changes in remediation techniques, or legal and regulatory requirements, could affect Consumers’ estimates of annual response activity costs and the MGP liability.

Pursuant to orders issued by the MPSC, Consumers defers its MGP-related remediation costs and recovers them from its customers over a ten‑year period. At September 30, 2017, Consumers had a regulatory asset of $141 million related to the MGP sites.

Consumers estimates that its liability to perform remediation and other response activities at NREPA sites other than the MGP sites could reach $3 million. At September 30, 2017, Consumers had a recorded liability of less than $1 million, the minimum amount in the range of its estimated probable liability, as no amount in the range was considered a better estimate than any other amount.

Guarantees

Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2017:

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1	Various	Indefinite		$	153		$	7
Guarantees2	Various	Indefinite			45			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

2At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the U.S. Department of Energy and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee.

Additionally, in the normal course of business, CMS Energy, Consumers, and certain other subsidiaries of CMS Energy have entered into various agreements containing tax and other indemnity provisions for which they are unable to estimate the maximum potential obligation. The carrying value of these indemnity obligations is $1 million. CMS Energy and Consumers consider the likelihood that they would be required to perform or incur substantial losses related to these indemnities to be remote.

Other Contingencies

In addition to the matters disclosed in this Note and Note 2, Regulatory Matters, there are certain other lawsuits and administrative proceedings before various courts and governmental agencies arising in the ordinary course of business to which CMS Energy, Consumers, and certain other subsidiaries of CMS Energy are parties. These other lawsuits and proceedings may involve personal injury, property damage, contracts, environmental matters, federal and state taxes, rates, licensing, employment, and other matters. Further, CMS Energy and Consumers occasionally self-report certain regulatory non‑compliance matters that may or may not eventually result in administrative proceedings. CMS Energy and Consumers believe that the outcome of any one of these proceedings will not have a material negative effect on their consolidated results of operations, financial condition, or liquidity.

Consumers Energy Company [Member]

Contingencies And Commitments

3:Contingencies and Commitments

CMS Energy and Consumers are involved in various matters that give rise to contingent liabilities. Depending on the specific issues, the resolution of these contingencies could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. In their disclosures of these matters, CMS Energy and Consumers provide an estimate of the possible loss or range of loss when such an estimate can be made. Disclosures that state that CMS Energy or Consumers cannot predict the outcome of a matter indicate that they are unable to estimate a possible loss or range of loss for the matter.

CMS Energy Contingencies

Gas Index Price Reporting Litigation: CMS Energy, along with CMS MST, CMS Field Services, Cantera Natural Gas, Inc., and Cantera Gas Company, have been named as defendants in four class action lawsuits and one individual lawsuit arising as a result of alleged inaccurate natural gas price reporting to publications that report trade information. Allegations include price-fixing conspiracies, restraint of trade, and artificial inflation of natural gas retail prices in Kansas, Missouri, and Wisconsin. Plaintiffs are making claims for the following: treble damages, full consideration damages, exemplary damages, costs, interest, and/or attorneys’ fees.

After removal to federal court, all of the cases were transferred to a single federal district court pursuant to the multidistrict litigation process. In 2010 and 2011, all claims against CMS Energy defendants were dismissed by the district court based on FERC preemption. In 2013, the U.S. Court of Appeals for the Ninth Circuit reversed the district court decision. The appellate court found that FERC preemption does not apply under the facts of these cases. The appellate court affirmed the district court’s denial of leave to amend to add federal antitrust claims. The matter was appealed to the U.S. Supreme Court, which in 2015 upheld the Ninth Circuit’s decision. The cases were remanded back to the federal district court.

In May 2016, the federal district court granted the defendants’ motion for summary judgment in the individual lawsuit based on a release in a prior settlement involving similar allegations and reinstated CMS Energy as a defendant in one of the class action lawsuits. The order of summary judgment has been appealed.

In December 2016, CMS Energy entities reached a settlement with the plaintiffs in the three Kansas and Missouri cases for an amount that was not material to CMS Energy. In August 2017, the federal district court approved the settlement.

CMS Energy entities remain as defendants in the Wisconsin class action lawsuits. In March2017, the federal district court denied plaintiffs’ motion for class certification. The plaintiffs appealed that decision to the U.S. Court of Appeals for the Ninth Circuit, which has accepted the matter for hearing. In June 2017, an unaffiliated company that is also a defendant in these cases filed for bankruptcy, which could increase the risk of loss to CMS Energy.

These cases involve complex facts, a large number of similarly situated defendants with different factual positions, and multiple jurisdictions. Presently, any estimate of liability would be highly speculative; the amount of CMS Energy’s reasonably possible loss would be based on widely varying models previously untested in this context. If the outcome after appeals is unfavorable, these cases could negatively affect CMS Energy’s liquidity, financial condition, and results of operations.

Bay Harbor: CMS Land retained environmental remediation obligations for the collection and treatment of leachate, a liquid consisting of water and other substances, at Bay Harbor after selling its interests in the development in 2002. Leachate is produced when water enters into cement kiln dust piles left over from former cement plant operations at the site. In 2012, CMS Land and the MDEQ finalized an agreement that established the final remedies and the future water quality criteria at the site. CMS Land completed all construction necessary to implement the remedies required by the agreement and will continue to maintain and operate a system to discharge treated leachate into Little Traverse Bay under an NPDES permit issued in 2010 and renewed in October 2016. The renewed NPDES permit is valid through September 2020.

Various claims have been brought against CMS Land or its affiliates, including CMS Energy, alleging environmental damage to property, loss of property value, insufficient disclosure of environmental matters, breach of agreement relating to access, or other matters. CMS Land and other parties have received a demand for payment from the EPA in the amount of $8 million, plus interest. The EPA is seeking recovery under CERCLA of response costs allegedly incurred at Bay Harbor. These costs exceed what was agreed to in a 2005 order between CMS Land and the EPA, and CMS Land has communicated to the EPA that it does not believe that this is a valid claim. The EPA has filed a lawsuit to collect these costs.

At September 30, 2017, CMS Energy had a recorded liability of $49 million for its remaining obligations for environmental remediation. CMS Energy calculated this liability based on discounted projected costs, using a discount rate of 4.34 percent and an inflation rate of one percent on annual operating and maintenance costs. The undiscounted amount of the remaining obligation is $62 million. CMS Energy expects to pay the following amounts for long-term liquid disposal and operating and maintenance costs during the remainder of 2017 and in each of the next five years:

In Millions
	2017			2018			2019			2020			2021			2022
CMS Energy
Long-term liquid disposal and operating and maintenance costs		$	1		$	4		$	4		$	4		$	4		$	4

CMS Energy’s estimate of response activity costs and the timing of expenditures could change if there are changes in circumstances or assumptions used in calculating the liability. Although a liability for its present estimate of remaining response activity costs has been recorded, CMS Energy cannot predict the ultimate financial impact or outcome of this matter.

Equatorial Guinea Tax Claim: In 2002, CMS Energy sold its oil, gas, and methanol investments in Equatorial Guinea. The government of Equatorial Guinea claims that, in connection with the sale, CMS Energy owes $152 million in taxes, plus substantial penalties and interest that could be up to the amount of the taxes claimed. The matter is proceeding to formal arbitration. CMS Energy has concluded that the government’s tax claim is without merit and is contesting the claim, but cannot predict the financial impact or outcome of the matter. An unfavorable outcome could have a material adverse effect on CMS Energy’s liquidity, financial condition, and results of operations.

Consumers Electric Utility Contingencies

Electric Environmental Matters: Consumers’ operations are subject to environmental laws and regulations. Historically, Consumers has generally been able to recover, in customer rates, the costs to operate its facilities in compliance with these laws and regulations.

Cleanup and Solid Waste: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. Consumers believes that these costs should be recoverable in rates, but cannot guarantee that outcome. Consumers estimates that its liability for NREPA sites for which it can estimate a range of loss will be between $3 million and $4 million. At September 30, 2017, Consumers had a recorded liability of $3 million, the minimum amount in the range of its estimated probable NREPA liability, as no amount in the range was considered a better estimate than any other amount.

Consumers is a potentially responsible party at a number of contaminated sites administered under CERCLA. CERCLA liability is joint and several. In 2010, Consumers received official notification from the EPA that identified Consumers as a potentially responsible party for cleanup of PCBs at the Kalamazoo River CERCLA site. The notification claimed that the EPA has reason to believe that Consumers disposed of PCBs and arranged for the disposal and treatment of PCB-containing materials at portions of the site. In 2011, Consumers received a follow‑up letter from the EPA requesting that Consumers agree to participate in a removal action plan along with several other companies for an area of lower Portage Creek, which is connected to the Kalamazoo River. All parties, including Consumers, that were asked to participate in the removal action plan declined to accept liability. Until further information is received from the EPA, Consumers is unable to estimate a range of potential liability for cleanup of the river.

Based on its experience, Consumers estimates that its share of the total liability for known CERCLA sites will be between $3 million and $8 million. Various factors, including the number and creditworthiness of potentially responsible parties involved with each site, affect Consumers’ share of the total liability. At September 30, 2017, Consumers had a recorded liability of $3 million for its share of the total liability at these sites, the minimum amount in the range of its estimated probable CERCLA liability, as no amount in the range was considered a better estimate than any other amount.

The timing of payments related to Consumers’ remediation and other response activities at its CERCLA and NREPA sites is uncertain. Consumers periodically reviews these cost estimates. A change in the underlying assumptions, such as an increase in the number of sites, different remediation techniques, the nature and extent of contamination, and legal and regulatory requirements, could affect its estimates of NREPA and CERCLA liability.

Ludington PCB: In 1998, during routine maintenance activities, Consumers identified PCB as a component in certain paint, grout, and sealant materials at Ludington. Consumers removed part of the PCB material and replaced it with non‑PCB material. Consumers has had several communications with the EPA regarding this matter, but cannot predict the financial impact or outcome.

Consumers Gas Utility Contingencies

Gas Environmental Matters: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. These sites include 23 former MGP facilities. Consumers operated the facilities on these sites for some part of their operating lives. For some of these sites, Consumers has no present ownership interest or may own only a portion of the original site.

At September 30, 2017, Consumers had a recorded liability of $93 million for its remaining obligations for these sites. This amount represents the present value of long-term projected costs, using a discount rate of 2.57 percent and an inflation rate of 2.5 percent. The undiscounted amount of the remaining obligation is $104 million. Consumers expects to pay the following amounts for remediation and other response activity costs during the remainder of 2017 and in each of the next five years:

In Millions
	2017			2018			2019			2020			2021			2022
Consumers
Remediation and other response activity costs		$	8		$	16		$	18		$	10		$	18		$	7

Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, changes in remediation techniques, or legal and regulatory requirements, could affect Consumers’ estimates of annual response activity costs and the MGP liability.

Pursuant to orders issued by the MPSC, Consumers defers its MGP-related remediation costs and recovers them from its customers over a ten‑year period. At September 30, 2017, Consumers had a regulatory asset of $141 million related to the MGP sites.

Consumers estimates that its liability to perform remediation and other response activities at NREPA sites other than the MGP sites could reach $3 million. At September 30, 2017, Consumers had a recorded liability of less than $1 million, the minimum amount in the range of its estimated probable liability, as no amount in the range was considered a better estimate than any other amount.

Guarantees

Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2017:

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1	Various	Indefinite		$	153		$	7
Guarantees2	Various	Indefinite			45			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

2At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the U.S. Department of Energy and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee.

Additionally, in the normal course of business, CMS Energy, Consumers, and certain other subsidiaries of CMS Energy have entered into various agreements containing tax and other indemnity provisions for which they are unable to estimate the maximum potential obligation. The carrying value of these indemnity obligations is $1 million. CMS Energy and Consumers consider the likelihood that they would be required to perform or incur substantial losses related to these indemnities to be remote.

Other Contingencies

In addition to the matters disclosed in this Note and Note 2, Regulatory Matters, there are certain other lawsuits and administrative proceedings before various courts and governmental agencies arising in the ordinary course of business to which CMS Energy, Consumers, and certain other subsidiaries of CMS Energy are parties. These other lawsuits and proceedings may involve personal injury, property damage, contracts, environmental matters, federal and state taxes, rates, licensing, employment, and other matters. Further, CMS Energy and Consumers occasionally self-report certain regulatory non‑compliance matters that may or may not eventually result in administrative proceedings. CMS Energy and Consumers believe that the outcome of any one of these proceedings will not have a material negative effect on their consolidated results of operations, financial condition, or liquidity.

XML

Financings And Capitalization

9 Months Ended

Sep. 30, 2017

Financings And Capitalization

4:Financings and Capitalization

Financings: Presented in the following table is a summary of major long-term debt transactions during the nine months ended September 30, 2017.

	Principal  (In Millions)			Interest Rate		Issue/Retirement  Date	Maturity Date
Debt issuances
CMS Energy, parent only
Senior notes		$	350	3.450	%	February 2017	August 2027
Total CMS Energy, parent only		$	350
Consumers
First mortgage bonds		$	350	3.950	%	February 2017	July 2047
First mortgage bonds1			40	3.180		September 2017	September 2032
First mortgage bonds1			125	3.520		September 2017	September 2037
First mortgage bonds1			20	3.860		September 2017	September 2052
Total Consumers		$	535
Total CMS Energy		$	885
Debt retirements
Consumers
First mortgage bonds		$	250	5.150	%	February 2017	February 2017
Senior notes			180	6.875		September 2017	March 2018
Total Consumers		$	430
Total CMS Energy		$	430

1These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032,  $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

In October 2017, Consumers retired $100 million of 3.21‑percent first mortgage bonds at maturity.

Term Loan: In April 2017, CMS Energy reached an agreement to extend the maturity date of its $180 million term loan by one year, through April 2019.

Revolving Credit Facilities: The following secured revolving credit facilities with banks were available at September 30, 2017:

In Millions
Expiration Date	Amount of Facility			Amount Borrowed			Letters of Credit  Outstanding			Amount Available
CMS Energy, parent only
May 27, 20221,2		$	550		$	-		$	1		$	549
Consumers
May 27, 20222,3		$	650		$	-		$	7		$	643
November 23, 20183			250			-			-			250
September 9, 20193,4			30			-			30			-

1During the nine months ended September 30, 2017, CMS Energy’s average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

2In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

3Obligations under this facility are secured by first mortgage bonds of Consumers.

4In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, commercial paper notes with maturities of up to 365 days and that bear interest at fixed or floating rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity. At September 30, 2017, $230 million of commercial paper notes were outstanding under this program and recorded as current notes payable on the consolidated balance sheets of CMS Energy and Consumers.

Dividend Restrictions: At September 30, 2017, payment of dividends by CMS Energy on its common stock was limited to $4.5 billion under provisions of the Michigan Business Corporation Act of 1972.

Under the provisions of its articles of incorporation, at September 30, 2017, Consumers had $1.1 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process.

For the nine months ended September 30, 2017, Consumers paid $347 million in dividends on its common stock to CMS Energy.

Issuance of Common Stock: In March 2017, CMS Energy entered into an updated continuous equity offering program permitting it to sell, from time to time in “at the market” offerings, common stock having an aggregate sales price of up to $100 million. Presented in the following table are the transactions that CMS Energy entered into under the program:

	Number of  Shares Issued	Average  Price per Share			Net Proceeds  (In Millions)
June 2017	1,494,371		$	47.31		$	70

Consumers Energy Company [Member]

Financings And Capitalization

4:Financings and Capitalization

Financings: Presented in the following table is a summary of major long-term debt transactions during the nine months ended September 30, 2017.

	Principal  (In Millions)			Interest Rate		Issue/Retirement  Date	Maturity Date
Debt issuances
CMS Energy, parent only
Senior notes		$	350	3.450	%	February 2017	August 2027
Total CMS Energy, parent only		$	350
Consumers
First mortgage bonds		$	350	3.950	%	February 2017	July 2047
First mortgage bonds1			40	3.180		September 2017	September 2032
First mortgage bonds1			125	3.520		September 2017	September 2037
First mortgage bonds1			20	3.860		September 2017	September 2052
Total Consumers		$	535
Total CMS Energy		$	885
Debt retirements
Consumers
First mortgage bonds		$	250	5.150	%	February 2017	February 2017
Senior notes			180	6.875		September 2017	March 2018
Total Consumers		$	430
Total CMS Energy		$	430

1These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032,  $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

In October 2017, Consumers retired $100 million of 3.21‑percent first mortgage bonds at maturity.

Term Loan: In April 2017, CMS Energy reached an agreement to extend the maturity date of its $180 million term loan by one year, through April 2019.

Revolving Credit Facilities: The following secured revolving credit facilities with banks were available at September 30, 2017:

In Millions
Expiration Date	Amount of Facility			Amount Borrowed			Letters of Credit  Outstanding			Amount Available
CMS Energy, parent only
May 27, 20221,2		$	550		$	-		$	1		$	549
Consumers
May 27, 20222,3		$	650		$	-		$	7		$	643
November 23, 20183			250			-			-			250
September 9, 20193,4			30			-			30			-

1During the nine months ended September 30, 2017, CMS Energy’s average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

2In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

3Obligations under this facility are secured by first mortgage bonds of Consumers.

4In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, commercial paper notes with maturities of up to 365 days and that bear interest at fixed or floating rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity. At September 30, 2017, $230 million of commercial paper notes were outstanding under this program and recorded as current notes payable on the consolidated balance sheets of CMS Energy and Consumers.

Dividend Restrictions: At September 30, 2017, payment of dividends by CMS Energy on its common stock was limited to $4.5 billion under provisions of the Michigan Business Corporation Act of 1972.

Under the provisions of its articles of incorporation, at September 30, 2017, Consumers had $1.1 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process.

For the nine months ended September 30, 2017, Consumers paid $347 million in dividends on its common stock to CMS Energy.

Issuance of Common Stock: In March 2017, CMS Energy entered into an updated continuous equity offering program permitting it to sell, from time to time in “at the market” offerings, common stock having an aggregate sales price of up to $100 million. Presented in the following table are the transactions that CMS Energy entered into under the program:

	Number of  Shares Issued	Average  Price per Share			Net Proceeds  (In Millions)
June 2017	1,494,371		$	47.31		$	70

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Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Measurements

5:Fair Value Measurements

Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. When measuring fair value, CMS Energy and Consumers are required to incorporate all assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. A fair value hierarchy prioritizes inputs used to measure fair value according to their observability in the market. The three levels of the fair value hierarchy are as follows:

· Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

· Level 2 inputs are observable, market-based inputs, other than Level 1 prices. Level 2 inputs may include quoted prices for similar assets or liabilities in active markets, quoted prices in inactive markets, and inputs derived from or corroborated by observable market data.

· Level 3 inputs are unobservable inputs that reflect CMS Energy’s or Consumers’ own assumptions about how market participants would value their assets and liabilities.

CMS Energy and Consumers classify fair value measurements within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement in its entirety.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

1All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Cash Equivalents: Cash equivalents and restricted cash equivalents consist of money market funds with daily liquidity. Short-term debt instruments classified as cash equivalents on the consolidated balance sheets are not included since they are recorded at amortized cost.

Nonqualified Deferred Compensation Plan Assets and Liabilities: The nonqualified deferred compensation plan assets consist of mutual funds, which are valued using the daily quoted net asset values. CMS Energy and Consumers value their nonqualified deferred compensation plan liabilities based on the fair values of the plan assets, as they reflect what is owed to the plan participants in accordance with their investment elections. CMS Energy and Consumers report the assets in other non‑current assets and the liabilities in other non‑current liabilities on their consolidated balance sheets.

DB SERP Assets: The DB SERP cash equivalents consist of a money market fund with daily liquidity. The DB SERP invests in mutual funds that hold primarily fixed-income instruments of varying maturities. In order to meet their investment objectives, the funds hold investment-grade debt securities, and may invest a portion of their assets in high-yield securities, foreign debt, and derivative instruments. CMS Energy and Consumers value these funds using the daily quoted net asset values. CMS Energy and Consumers report their DB SERP assets in other non‑current assets on their consolidated balance sheets. For additional details about DB SERP securities, see Note 6, Financial Instruments.

Derivative Instruments: CMS Energy and Consumers value their derivative instruments using either a market approach that incorporates information from market transactions, or an income approach that discounts future expected cash flows to a present value amount. CMS Energy values its exchange-traded derivative contracts based on Level1 quoted prices. CMS Energy’s and Consumers’ remaining derivatives are classified as Level 3.

The majority of these derivatives are FTRs held by Consumers. Consumers uses FTRs to manage price risk related to electricity transmission congestion. An FTR is a financial instrument that entitles its holder to receive compensation or requires its holder to remit payment for congestion-related transmission charges. Under regulatory accounting, all changes in fair value associated with FTRs are deferred as regulatory assets and liabilities until the instruments are settled. Due to the lack of quoted pricing information, Consumers determines the fair value of its FTRs based on Consumers’ average historical settlements.

Consumers Energy Company [Member]

Fair Value Measurements

5:Fair Value Measurements

Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. When measuring fair value, CMS Energy and Consumers are required to incorporate all assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. A fair value hierarchy prioritizes inputs used to measure fair value according to their observability in the market. The three levels of the fair value hierarchy are as follows:

· Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

· Level 2 inputs are observable, market-based inputs, other than Level 1 prices. Level 2 inputs may include quoted prices for similar assets or liabilities in active markets, quoted prices in inactive markets, and inputs derived from or corroborated by observable market data.

· Level 3 inputs are unobservable inputs that reflect CMS Energy’s or Consumers’ own assumptions about how market participants would value their assets and liabilities.

CMS Energy and Consumers classify fair value measurements within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement in its entirety.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

1All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Cash Equivalents: Cash equivalents and restricted cash equivalents consist of money market funds with daily liquidity. Short-term debt instruments classified as cash equivalents on the consolidated balance sheets are not included since they are recorded at amortized cost.

Nonqualified Deferred Compensation Plan Assets and Liabilities: The nonqualified deferred compensation plan assets consist of mutual funds, which are valued using the daily quoted net asset values. CMS Energy and Consumers value their nonqualified deferred compensation plan liabilities based on the fair values of the plan assets, as they reflect what is owed to the plan participants in accordance with their investment elections. CMS Energy and Consumers report the assets in other non‑current assets and the liabilities in other non‑current liabilities on their consolidated balance sheets.

DB SERP Assets: The DB SERP cash equivalents consist of a money market fund with daily liquidity. The DB SERP invests in mutual funds that hold primarily fixed-income instruments of varying maturities. In order to meet their investment objectives, the funds hold investment-grade debt securities, and may invest a portion of their assets in high-yield securities, foreign debt, and derivative instruments. CMS Energy and Consumers value these funds using the daily quoted net asset values. CMS Energy and Consumers report their DB SERP assets in other non‑current assets on their consolidated balance sheets. For additional details about DB SERP securities, see Note 6, Financial Instruments.

Derivative Instruments: CMS Energy and Consumers value their derivative instruments using either a market approach that incorporates information from market transactions, or an income approach that discounts future expected cash flows to a present value amount. CMS Energy values its exchange-traded derivative contracts based on Level1 quoted prices. CMS Energy’s and Consumers’ remaining derivatives are classified as Level 3.

The majority of these derivatives are FTRs held by Consumers. Consumers uses FTRs to manage price risk related to electricity transmission congestion. An FTR is a financial instrument that entitles its holder to receive compensation or requires its holder to remit payment for congestion-related transmission charges. Under regulatory accounting, all changes in fair value associated with FTRs are deferred as regulatory assets and liabilities until the instruments are settled. Due to the lack of quoted pricing information, Consumers determines the fair value of its FTRs based on Consumers’ average historical settlements.

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Financial Instruments

9 Months Ended

Sep. 30, 2017

Financial Instruments

6:Financial Instruments

Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 5, Fair Value Measurements.

In Millions
	September 30, 2017															December 31, 2016
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,382			1,479			-			-			1,479			1,326			1,415			-			-			1,415
Securities held    to maturity			16			16			-			16			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,983			10,484			-			9,331			1,153			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			46			46			-			-			46			45			45			-			-			45
Liabilities
Long-term    debt6			5,718			6,032			-			4,879			1,153			5,628			5,903			-			4,940			963

1Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

2Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

3Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

4Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

5Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

6Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

At CMS Energy, notes receivable consist primarily of EnerBank’s fixed-rate installment loans. EnerBank estimates the fair value of these loans using a discounted cash flows technique that incorporates market interest rates as well as assumptions about the remaining life of the loans and credit risk.

CMS Energy and Consumers estimate the fair value of their long-term debt using quoted prices from market trades of the debt, if available. In the absence of quoted prices, CMS Energy and Consumers calculate market yields and prices for the debt using a matrix method that incorporates market data for similarly rated debt. Depending on the information available, other valuation techniques and models may be used that rely on assumptions that cannot be observed or confirmed through market transactions.

The effects of third-party credit enhancements are excluded from the fair value measurements of long-term debt. At September 30, 2017 and December 31, 2016, CMS Energy’s long-term debt included $103 million principal amount that was supported by third-party credit enhancements. This entire principal amount was at Consumers.

Presented in the following table are CMS Energy’s and Consumers’ investment securities classified as available for sale or held to maturity:

In Millions
	September 30, 2017												December 31, 2016
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	142		$	3		$	-		$	145		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			16			-			-			16			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	103		$	2		$	-		$	105		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			19			-			21			4			29			-			33

The mutual funds classified as available for sale hold primarily fixed-income instruments of varying maturities. Debt securities classified as held to maturity consist primarily of mortgage-backed securities and Utah Housing Corporation bonds held by EnerBank.

Consumers Energy Company [Member]

Financial Instruments

6:Financial Instruments

Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 5, Fair Value Measurements.

In Millions
	September 30, 2017															December 31, 2016
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,382			1,479			-			-			1,479			1,326			1,415			-			-			1,415
Securities held    to maturity			16			16			-			16			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,983			10,484			-			9,331			1,153			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			46			46			-			-			46			45			45			-			-			45
Liabilities
Long-term    debt6			5,718			6,032			-			4,879			1,153			5,628			5,903			-			4,940			963

1Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

2Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

3Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

4Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

5Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

6Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

At CMS Energy, notes receivable consist primarily of EnerBank’s fixed-rate installment loans. EnerBank estimates the fair value of these loans using a discounted cash flows technique that incorporates market interest rates as well as assumptions about the remaining life of the loans and credit risk.

CMS Energy and Consumers estimate the fair value of their long-term debt using quoted prices from market trades of the debt, if available. In the absence of quoted prices, CMS Energy and Consumers calculate market yields and prices for the debt using a matrix method that incorporates market data for similarly rated debt. Depending on the information available, other valuation techniques and models may be used that rely on assumptions that cannot be observed or confirmed through market transactions.

The effects of third-party credit enhancements are excluded from the fair value measurements of long-term debt. At September 30, 2017 and December 31, 2016, CMS Energy’s long-term debt included $103 million principal amount that was supported by third-party credit enhancements. This entire principal amount was at Consumers.

Presented in the following table are CMS Energy’s and Consumers’ investment securities classified as available for sale or held to maturity:

In Millions
	September 30, 2017												December 31, 2016
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	142		$	3		$	-		$	145		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			16			-			-			16			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	103		$	2		$	-		$	105		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			19			-			21			4			29			-			33

The mutual funds classified as available for sale hold primarily fixed-income instruments of varying maturities. Debt securities classified as held to maturity consist primarily of mortgage-backed securities and Utah Housing Corporation bonds held by EnerBank.

XML

Notes Receivable

9 Months Ended

Sep. 30, 2017

Notes Receivable

7:Notes Receivable

Presented in the following table are details of CMS Energy’s and Consumers’ current and non‑current notes receivable:

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Current
EnerBank notes receivable, net of allowance for loan losses		$	167		$	151
EnerBank notes receivable held for sale			31			39
Michigan tax settlement			30			29
Non-current
EnerBank notes receivable			1,134			1,088
Michigan tax settlement			20			19
Total notes receivable		$	1,382		$	1,326
Consumers
Current
Michigan tax settlement		$	30		$	29
Non-current
Michigan tax settlement			16			16
Total notes receivable		$	46		$	45

EnerBank notes receivable are unsecured consumer installment loans for financing home improvements. EnerBank records its notes receivable at cost, less an allowance for loan losses. In March 2017, EnerBank completed a sale of notes receivable, receiving proceeds of $19 million and recording an insignificant gain. At September 30, 2017, $31 million of notes receivable remained classified as held for sale; the fair value of notes receivable held for sale exceeded their carrying value. These notes are expected to be sold in 2017.

Authorized contractors pay fees to EnerBank to provide borrowers with same-as-cash, zero interest, or reduced interest loans. Unearned income associated with the loan fees, which is recorded as a reduction to notes receivable on CMS Energy’s consolidated balance sheets, was $83 million at September 30, 2017 and $84 million at December 31, 2016. Unearned income associated with the loan fees for notes receivable held for sale was $6 million at September 30, 2017 and $8 million at December 31, 2016.

The allowance for loan losses is a valuation allowance to reflect estimated credit losses. The allowance is increased by the provision for loan losses and decreased by loan charge-offs net of recoveries. Management estimates the allowance balance required by taking into consideration historical loan loss experience, the nature and volume of the portfolio, economic conditions, and other factors. Loan losses are charged against the allowance when the loss is confirmed, but no later than the point at which a loan becomes 120 days past due.

Loans that are 30 days or more past due are considered delinquent. The balance of EnerBank’s delinquent consumer loans was $12 million at September 30, 2017 and $11 million at December 31, 2016.

At September 30, 2017 and December 31, 2016, $1 million of EnerBank’s loans had been modified as troubled debt restructurings.

Consumers Energy Company [Member]

Notes Receivable

7:Notes Receivable

Presented in the following table are details of CMS Energy’s and Consumers’ current and non‑current notes receivable:

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Current
EnerBank notes receivable, net of allowance for loan losses		$	167		$	151
EnerBank notes receivable held for sale			31			39
Michigan tax settlement			30			29
Non-current
EnerBank notes receivable			1,134			1,088
Michigan tax settlement			20			19
Total notes receivable		$	1,382		$	1,326
Consumers
Current
Michigan tax settlement		$	30		$	29
Non-current
Michigan tax settlement			16			16
Total notes receivable		$	46		$	45

EnerBank notes receivable are unsecured consumer installment loans for financing home improvements. EnerBank records its notes receivable at cost, less an allowance for loan losses. In March 2017, EnerBank completed a sale of notes receivable, receiving proceeds of $19 million and recording an insignificant gain. At September 30, 2017, $31 million of notes receivable remained classified as held for sale; the fair value of notes receivable held for sale exceeded their carrying value. These notes are expected to be sold in 2017.

Authorized contractors pay fees to EnerBank to provide borrowers with same-as-cash, zero interest, or reduced interest loans. Unearned income associated with the loan fees, which is recorded as a reduction to notes receivable on CMS Energy’s consolidated balance sheets, was $83 million at September 30, 2017 and $84 million at December 31, 2016. Unearned income associated with the loan fees for notes receivable held for sale was $6 million at September 30, 2017 and $8 million at December 31, 2016.

The allowance for loan losses is a valuation allowance to reflect estimated credit losses. The allowance is increased by the provision for loan losses and decreased by loan charge-offs net of recoveries. Management estimates the allowance balance required by taking into consideration historical loan loss experience, the nature and volume of the portfolio, economic conditions, and other factors. Loan losses are charged against the allowance when the loss is confirmed, but no later than the point at which a loan becomes 120 days past due.

Loans that are 30 days or more past due are considered delinquent. The balance of EnerBank’s delinquent consumer loans was $12 million at September 30, 2017 and $11 million at December 31, 2016.

At September 30, 2017 and December 31, 2016, $1 million of EnerBank’s loans had been modified as troubled debt restructurings.

XML

Retirement Benefits

9 Months Ended

Sep. 30, 2017

Retirement Benefits

8:Retirement Benefits

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans.

CMS Energy and Consumers elected to adopt ASU2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, as of January1, 2017. For further details on the implementation of this standard, see Note1, New Accounting Standards.

Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

In Millions
	DB Pension Plan												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	10		$	34		$	31		$	5		$	5		$	15		$	14
Interest cost			23			21			67			64			13			12			39			35
Expected return on plan assets			(39)			(36)			(115)			(110)			(22)			(22)			(67)			(65)
Amortization of:
Net loss			20			17			60			52			7			5			23			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(26)			(31)
Net periodic cost (credit)		$	17		$	13		$	49		$	40		$	(5)		$	(10)		$	(16)		$	(31)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	33		$	31		$	5		$	4		$	14		$	13
Interest cost			22			20			65			62			12			12			38			34
Expected return on plan assets			(38)			(35)			(112)			(107)			(21)			(20)			(63)			(60)
Amortization of:
Net loss			19			16			58			50			8			5			24			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(25)			(30)
Net periodic cost (credit)		$	15		$	13		$	47		$	39		$	(4)		$	(9)		$	(12)		$	(27)

Consumers Energy Company [Member]

Retirement Benefits

8:Retirement Benefits

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans.

CMS Energy and Consumers elected to adopt ASU2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, as of January1, 2017. For further details on the implementation of this standard, see Note1, New Accounting Standards.

Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

In Millions
	DB Pension Plan												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	10		$	34		$	31		$	5		$	5		$	15		$	14
Interest cost			23			21			67			64			13			12			39			35
Expected return on plan assets			(39)			(36)			(115)			(110)			(22)			(22)			(67)			(65)
Amortization of:
Net loss			20			17			60			52			7			5			23			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(26)			(31)
Net periodic cost (credit)		$	17		$	13		$	49		$	40		$	(5)		$	(10)		$	(16)		$	(31)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	33		$	31		$	5		$	4		$	14		$	13
Interest cost			22			20			65			62			12			12			38			34
Expected return on plan assets			(38)			(35)			(112)			(107)			(21)			(20)			(63)			(60)
Amortization of:
Net loss			19			16			58			50			8			5			24			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(25)			(30)
Net periodic cost (credit)		$	15		$	13		$	47		$	39		$	(4)		$	(9)		$	(12)		$	(27)

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Income Taxes

9 Months Ended

Sep. 30, 2017

Income Taxes

9:Income Taxes

Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:

Nine Months Ended September 30	2017			2016
CMS Energy, including Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.2
Accelerated flow-through of regulatory tax benefits2		(4.3)			(4.7)
Employee share-based awards		(0.9)			(0.8)
Other, net		(2.0)			(1.4)
Effective tax rate		30.1	%		32.3	%
Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.6
Accelerated flow-through of regulatory tax benefits2		(3.9)			(4.0)
Employee share-based awards		(0.8)			(0.7)
Other, net		(2.3)			(1.2)
Effective tax rate		30.3	%		33.7	%

1In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers’ electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy’s effective tax rate and a 2.2 percentage point reduction to Consumers’ effective tax rate.

2Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers’ recognition of the income tax benefits, reduced Consumers’ income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

Consumers Energy Company [Member]

Income Taxes

9:Income Taxes

Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:

Nine Months Ended September 30	2017			2016
CMS Energy, including Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.2
Accelerated flow-through of regulatory tax benefits2		(4.3)			(4.7)
Employee share-based awards		(0.9)			(0.8)
Other, net		(2.0)			(1.4)
Effective tax rate		30.1	%		32.3	%
Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.6
Accelerated flow-through of regulatory tax benefits2		(3.9)			(4.0)
Employee share-based awards		(0.8)			(0.7)
Other, net		(2.3)			(1.2)
Effective tax rate		30.3	%		33.7	%

1In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers’ electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy’s effective tax rate and a 2.2 percentage point reduction to Consumers’ effective tax rate.

2Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers’ recognition of the income tax benefits, reduced Consumers’ income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

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Earnings Per Share - CMS Energy

9 Months Ended

Sep. 30, 2017

Earnings Per Share - CMS Energy [Abstract]

Earnings Per Share - CMS Energy

10:Earnings Per Share—CMS Energy

Presented in the following table are CMS Energy’s basic and diluted EPS computations based on net income:

In Millions, Except Per Share Amounts
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Income available to common stockholders
Net income		$	172		$	186		$	464		$	475
Less income attributable to noncontrolling interests			-			-			1			1
Net income available to common stockholders – basic and diluted		$	172		$	186		$	463		$	474
Average common shares outstanding
Weighted-average shares – basic			280.8			278.2			279.8			277.7
Add dilutive nonvested stock awards			0.8			1.0			0.8			1.1
Weighted-average shares – diluted			281.6			279.2			280.6			278.8
Net income per average common share available to common stockholders
Basic		$	0.61		$	0.67		$	1.65		$	1.71
Diluted			0.61			0.67			1.65			1.70

Nonvested Stock Awards

CMS Energy’s nonvested stock awards are composed of participating and non‑participating securities. The participating securities accrue cash dividends when common stockholders receive dividends. Since the recipient is not required to return the dividends to CMS Energy if the recipient forfeits the award, the nonvested stock awards are considered participating securities. As such, the participating nonvested stock awards were included in the computation of basic EPS. The non‑participating securities accrue stock dividends that vest concurrently with the stock award. If the recipient forfeits the award, the stock dividends accrued on the non‑participating securities are also forfeited. Accordingly, the non‑participating awards and stock dividends were included in the computation of diluted EPS, but not basic EPS.

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Cash And Cash Equivalents

9 Months Ended

Sep. 30, 2017

Cash And Cash Equivalents

11:Cash and Cash Equivalents

Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:

In Millions
	September 30			December 31
	2017			2016
CMS Energy, including Consumers
Cash and cash equivalents		$	142		$	235
Restricted cash and cash equivalents			27			19
Other non-current assets			4			3
Cash and cash equivalents, including restricted amounts		$	173		$	257
Consumers
Cash and cash equivalents		$	55		$	131
Restricted cash and cash equivalents			27			19
Other non-current assets			3			2
Cash and cash equivalents, including restricted amounts		$	85		$	152

Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less.

Restricted Cash and Cash Equivalents: Restricted cash and cash equivalents are held primarily for the repayment of securitization bonds. Cash and cash equivalents may also be restricted to pay other contractual obligations such as leasing of coal rail cars. These amounts are classified as current assets since they relate to payments that could or will occur within one year.

Other Non‑current Assets: The cash equivalents classified as other non‑current assets represent an investment in a money market fund held in the DBSERP rabbi trust. See Note 5, Fair Value Measurements for more information regarding the DB SERP.

Implementation of ASU2016‑18, Restricted Cash: CMS Energy and Consumers have early adopted the provisions of ASU2016‑18, Restricted Cash, which requires restricted cash and cash equivalents to be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period amounts shown on the statement of cash flows. In addition, the standard requires that entities apply the new guidance retrospectively to all prior periods presented. Accordingly, CMS Energy and Consumers made the following adjustments to prior-period amounts on their consolidated statements of cash flows:

In Millions
Nine Months Ended September 30	2016
CMS Energy, including Consumers
Change in:
Net cash used in investing activities		$	7
Cash and cash equivalents, including restricted amounts, end of period			29
Consumers
Change in:
Net cash used in investing activities		$	8
Cash and cash equivalents, including restricted amounts, end of period			29

Consumers Energy Company [Member]

Cash And Cash Equivalents

11:Cash and Cash Equivalents

Presented in the following table are the components of total cash and cash equivalents, including restricted amounts, and their location on CMS Energy’s and Consumers’ consolidated balance sheets:

In Millions
	September 30			December 31
	2017			2016
CMS Energy, including Consumers
Cash and cash equivalents		$	142		$	235
Restricted cash and cash equivalents			27			19
Other non-current assets			4			3
Cash and cash equivalents, including restricted amounts		$	173		$	257
Consumers
Cash and cash equivalents		$	55		$	131
Restricted cash and cash equivalents			27			19
Other non-current assets			3			2
Cash and cash equivalents, including restricted amounts		$	85		$	152

Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less.

Restricted Cash and Cash Equivalents: Restricted cash and cash equivalents are held primarily for the repayment of securitization bonds. Cash and cash equivalents may also be restricted to pay other contractual obligations such as leasing of coal rail cars. These amounts are classified as current assets since they relate to payments that could or will occur within one year.

Other Non‑current Assets: The cash equivalents classified as other non‑current assets represent an investment in a money market fund held in the DBSERP rabbi trust. See Note 5, Fair Value Measurements for more information regarding the DB SERP.

Implementation of ASU2016‑18, Restricted Cash: CMS Energy and Consumers have early adopted the provisions of ASU2016‑18, Restricted Cash, which requires restricted cash and cash equivalents to be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period amounts shown on the statement of cash flows. In addition, the standard requires that entities apply the new guidance retrospectively to all prior periods presented. Accordingly, CMS Energy and Consumers made the following adjustments to prior-period amounts on their consolidated statements of cash flows:

In Millions
Nine Months Ended September 30	2016
CMS Energy, including Consumers
Change in:
Net cash used in investing activities		$	7
Cash and cash equivalents, including restricted amounts, end of period			29
Consumers
Change in:
Net cash used in investing activities		$	8
Cash and cash equivalents, including restricted amounts, end of period			29

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Reportable Segments

9 Months Ended

Sep. 30, 2017

Reportable Segments

12:Reportable Segments

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy’s common stockholders.

CMS Energy

The reportable segments for CMS Energy are:

· electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

· gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

· enterprises, consisting of various subsidiaries engaging primarily in domestic independent power production

CMS Energy presents EnerBank and corporate interest and other expenses within other reconciling items.

Consumers

The reportable segments for Consumers are:

· electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

· gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

Consumers’ other consolidated entities are presented within other reconciling items.

Presented in the following tables is financial information by reportable segment:

In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Enterprises			58			59			172			156
Other reconciling items			32			30			97			89
Total operating revenue – CMS Energy		$	1,527		$	1,587		$	4,805		$	4,759
Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Total operating revenue – Consumers		$	1,437		$	1,498		$	4,536		$	4,514
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Enterprises			8			8			27			17
Other reconciling items			(17)			(16)			(59)			(40)
Total net income available to common stockholders – CMS Energy		$	172		$	186		$	463		$	474
Consumers
Net income available to common stockholder
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Other reconciling items			-			1			-			1
Total net income available to common stockholder – Consumers		$	181		$	195		$	495		$	498

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Enterprises			164			157
Other reconciling items			33			30
Total plant, property, and equipment, gross – CMS Energy		$	21,966		$	21,010
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Other reconciling items			15			15
Total plant, property, and equipment, gross – Consumers		$	21,784		$	20,838
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,639		$	13,429
Gas utility1			6,701			6,446
Enterprises			280			269
Other reconciling items			1,500			1,478
Total assets – CMS Energy		$	22,120		$	21,622
Consumers
Total assets
Electric utility1		$	13,640		$	13,430
Gas utility1			6,701			6,446
Other reconciling items			39			70
Total assets – Consumers		$	20,380		$	19,946

1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.

Consumers Energy Company [Member]

Reportable Segments

12:Reportable Segments

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy’s common stockholders.

CMS Energy

The reportable segments for CMS Energy are:

· electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

· gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

· enterprises, consisting of various subsidiaries engaging primarily in domestic independent power production

CMS Energy presents EnerBank and corporate interest and other expenses within other reconciling items.

Consumers

The reportable segments for Consumers are:

· electric utility, consisting of regulated activities associated with the generation, transmission, and distribution of electricity in Michigan

· gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan

Consumers’ other consolidated entities are presented within other reconciling items.

Presented in the following tables is financial information by reportable segment:

In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Enterprises			58			59			172			156
Other reconciling items			32			30			97			89
Total operating revenue – CMS Energy		$	1,527		$	1,587		$	4,805		$	4,759
Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Total operating revenue – Consumers		$	1,437		$	1,498		$	4,536		$	4,514
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Enterprises			8			8			27			17
Other reconciling items			(17)			(16)			(59)			(40)
Total net income available to common stockholders – CMS Energy		$	172		$	186		$	463		$	474
Consumers
Net income available to common stockholder
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Other reconciling items			-			1			-			1
Total net income available to common stockholder – Consumers		$	181		$	195		$	495		$	498

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Enterprises			164			157
Other reconciling items			33			30
Total plant, property, and equipment, gross – CMS Energy		$	21,966		$	21,010
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Other reconciling items			15			15
Total plant, property, and equipment, gross – Consumers		$	21,784		$	20,838
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,639		$	13,429
Gas utility1			6,701			6,446
Enterprises			280			269
Other reconciling items			1,500			1,478
Total assets – CMS Energy		$	22,120		$	21,622
Consumers
Total assets
Electric utility1		$	13,640		$	13,430
Gas utility1			6,701			6,446
Other reconciling items			39			70
Total assets – Consumers		$	20,380		$	19,946

1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.

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Notes Receivable (Policy)

9 Months Ended

Sep. 30, 2017

Notes Receivable [Abstract]

Allowance For Loan Losses Policy

The allowance for loan losses is a valuation allowance to reflect estimated credit losses. The allowance is increased by the provision for loan losses and decreased by loan charge-offs net of recoveries. Management estimates the allowance balance required by taking into consideration historical loan loss experience, the nature and volume of the portfolio, economic conditions, and other factors. Loan losses are charged against the allowance when the loss is confirmed, but no later than the point at which a loan becomes 120 days past due.

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Contingencies And Commitments (Tables)

9 Months Ended

Sep. 30, 2017

Site Contingency [Line Items]

Guarantees

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1	Various	Indefinite		$	153		$	7
Guarantees2	Various	Indefinite			45			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

2At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the U.S. Department of Energy and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee.

Consumers Energy Company [Member]

Site Contingency [Line Items]

Guarantees

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and asset sale agreements1	Various	Indefinite		$	153		$	7
Guarantees2	Various	Indefinite			45			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

1These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

2At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the U.S. Department of Energy and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee.

Bay Harbor [Member]

Site Contingency [Line Items]

Expected Remediation Cost By Year

In Millions
	2017			2018			2019			2020			2021			2022
CMS Energy
Long-term liquid disposal and operating and maintenance costs		$	1		$	4		$	4		$	4		$	4		$	4

Gas Utility [Member] | Manufactured Gas Plant [Member] | Consumers Energy Company [Member]

Site Contingency [Line Items]

Expected Remediation Cost By Year

In Millions
	2017			2018			2019			2020			2021			2022
Consumers
Remediation and other response activity costs		$	8		$	16		$	18		$	10		$	18		$	7

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Financings And Capitalization (Tables)

9 Months Ended

Sep. 30, 2017

Major Long-Term Debt Transactions

	Principal  (In Millions)			Interest Rate		Issue/Retirement  Date	Maturity Date
Debt issuances
CMS Energy, parent only
Senior notes		$	350	3.450	%	February 2017	August 2027
Total CMS Energy, parent only		$	350
Consumers
First mortgage bonds		$	350	3.950	%	February 2017	July 2047
First mortgage bonds1			40	3.180		September 2017	September 2032
First mortgage bonds1			125	3.520		September 2017	September 2037
First mortgage bonds1			20	3.860		September 2017	September 2052
Total Consumers		$	535
Total CMS Energy		$	885
Debt retirements
Consumers
First mortgage bonds		$	250	5.150	%	February 2017	February 2017
Senior notes			180	6.875		September 2017	March 2018
Total Consumers		$	430
Total CMS Energy		$	430

1These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032,  $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

Revolving Credit Facilities

In Millions
Expiration Date	Amount of Facility			Amount Borrowed			Letters of Credit  Outstanding			Amount Available
CMS Energy, parent only
May 27, 20221,2		$	550		$	-		$	1		$	549
Consumers
May 27, 20222,3		$	650		$	-		$	7		$	643
November 23, 20183			250			-			-			250
September 9, 20193,4			30			-			30			-

1During the nine months ended September 30, 2017, CMS Energy’s average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

2In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

3Obligations under this facility are secured by first mortgage bonds of Consumers.

4In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

Issuance Of Common Stock

	Number of  Shares Issued	Average  Price per Share			Net Proceeds  (In Millions)
June 2017	1,494,371		$	47.31		$	70

Consumers Energy Company [Member]

Major Long-Term Debt Transactions

	Principal  (In Millions)			Interest Rate		Issue/Retirement  Date	Maturity Date
Debt issuances
CMS Energy, parent only
Senior notes		$	350	3.450	%	February 2017	August 2027
Total CMS Energy, parent only		$	350
Consumers
First mortgage bonds		$	350	3.950	%	February 2017	July 2047
First mortgage bonds1			40	3.180		September 2017	September 2032
First mortgage bonds1			125	3.520		September 2017	September 2037
First mortgage bonds1			20	3.860		September 2017	September 2052
Total Consumers		$	535
Total CMS Energy		$	885
Debt retirements
Consumers
First mortgage bonds		$	250	5.150	%	February 2017	February 2017
Senior notes			180	6.875		September 2017	March 2018
Total Consumers		$	430
Total CMS Energy		$	430

1These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032,  $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

Revolving Credit Facilities

In Millions
Expiration Date	Amount of Facility			Amount Borrowed			Letters of Credit  Outstanding			Amount Available
CMS Energy, parent only
May 27, 20221,2		$	550		$	-		$	1		$	549
Consumers
May 27, 20222,3		$	650		$	-		$	7		$	643
November 23, 20183			250			-			-			250
September 9, 20193,4			30			-			30			-

1During the nine months ended September 30, 2017, CMS Energy’s average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

2In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

3Obligations under this facility are secured by first mortgage bonds of Consumers.

4In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

1All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Consumers Energy Company [Member]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

1All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

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Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	September 30, 2017															December 31, 2016
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,382			1,479			-			-			1,479			1,326			1,415			-			-			1,415
Securities held    to maturity			16			16			-			16			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,983			10,484			-			9,331			1,153			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			46			46			-			-			46			45			45			-			-			45
Liabilities
Long-term    debt6			5,718			6,032			-			4,879			1,153			5,628			5,903			-			4,940			963

1Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

2Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

3Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

4Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

5Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

6Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

Schedule Of Investment Securities

In Millions
	September 30, 2017												December 31, 2016
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	142		$	3		$	-		$	145		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			16			-			-			16			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	103		$	2		$	-		$	105		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			19			-			21			4			29			-			33

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	September 30, 2017															December 31, 2016
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,382			1,479			-			-			1,479			1,326			1,415			-			-			1,415
Securities held    to maturity			16			16			-			16			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,983			10,484			-			9,331			1,153			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			46			46			-			-			46			45			45			-			-			45
Liabilities
Long-term    debt6			5,718			6,032			-			4,879			1,153			5,628			5,903			-			4,940			963

1Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

2Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

3Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

4Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

5Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

6Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

Schedule Of Investment Securities

In Millions
	September 30, 2017												December 31, 2016
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	142		$	3		$	-		$	145		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			16			-			-			16			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	103		$	2		$	-		$	105		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			19			-			21			4			29			-			33

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Notes Receivable (Tables)

9 Months Ended

Sep. 30, 2017

Schedule Of Current And Non-Current Notes Receivable

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Current
EnerBank notes receivable, net of allowance for loan losses		$	167		$	151
EnerBank notes receivable held for sale			31			39
Michigan tax settlement			30			29
Non-current
EnerBank notes receivable			1,134			1,088
Michigan tax settlement			20			19
Total notes receivable		$	1,382		$	1,326
Consumers
Current
Michigan tax settlement		$	30		$	29
Non-current
Michigan tax settlement			16			16
Total notes receivable		$	46		$	45

Consumers Energy Company [Member]

Schedule Of Current And Non-Current Notes Receivable

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Current
EnerBank notes receivable, net of allowance for loan losses		$	167		$	151
EnerBank notes receivable held for sale			31			39
Michigan tax settlement			30			29
Non-current
EnerBank notes receivable			1,134			1,088
Michigan tax settlement			20			19
Total notes receivable		$	1,382		$	1,326
Consumers
Current
Michigan tax settlement		$	30		$	29
Non-current
Michigan tax settlement			16			16
Total notes receivable		$	46		$	45

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Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Net Benefit Costs

In Millions
	DB Pension Plan												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	10		$	34		$	31		$	5		$	5		$	15		$	14
Interest cost			23			21			67			64			13			12			39			35
Expected return on plan assets			(39)			(36)			(115)			(110)			(22)			(22)			(67)			(65)
Amortization of:
Net loss			20			17			60			52			7			5			23			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(26)			(31)
Net periodic cost (credit)		$	17		$	13		$	49		$	40		$	(5)		$	(10)		$	(16)		$	(31)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	33		$	31		$	5		$	4		$	14		$	13
Interest cost			22			20			65			62			12			12			38			34
Expected return on plan assets			(38)			(35)			(112)			(107)			(21)			(20)			(63)			(60)
Amortization of:
Net loss			19			16			58			50			8			5			24			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(25)			(30)
Net periodic cost (credit)		$	15		$	13		$	47		$	39		$	(4)		$	(9)		$	(12)		$	(27)

Consumers Energy Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Net Benefit Costs

In Millions
	DB Pension Plan												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	10		$	34		$	31		$	5		$	5		$	15		$	14
Interest cost			23			21			67			64			13			12			39			35
Expected return on plan assets			(39)			(36)			(115)			(110)			(22)			(22)			(67)			(65)
Amortization of:
Net loss			20			17			60			52			7			5			23			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(26)			(31)
Net periodic cost (credit)		$	17		$	13		$	49		$	40		$	(5)		$	(10)		$	(16)		$	(31)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	33		$	31		$	5		$	4		$	14		$	13
Interest cost			22			20			65			62			12			12			38			34
Expected return on plan assets			(38)			(35)			(112)			(107)			(21)			(20)			(63)			(60)
Amortization of:
Net loss			19			16			58			50			8			5			24			16
Prior service cost (credit)			1			1			3			3			(8)			(10)			(25)			(30)
Net periodic cost (credit)		$	15		$	13		$	47		$	39		$	(4)		$	(9)		$	(12)		$	(27)

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Schedule Of Effective Income Tax Rate Reconciliation

Nine Months Ended September 30	2017			2016
CMS Energy, including Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.2
Accelerated flow-through of regulatory tax benefits2		(4.3)			(4.7)
Employee share-based awards		(0.9)			(0.8)
Other, net		(2.0)			(1.4)
Effective tax rate		30.1	%		32.3	%
Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.6
Accelerated flow-through of regulatory tax benefits2		(3.9)			(4.0)
Employee share-based awards		(0.8)			(0.7)
Other, net		(2.3)			(1.2)
Effective tax rate		30.3	%		33.7	%

1In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers’ electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy’s effective tax rate and a 2.2 percentage point reduction to Consumers’ effective tax rate.

2Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers’ recognition of the income tax benefits, reduced Consumers’ income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

Consumers Energy Company [Member]

Schedule Of Effective Income Tax Rate Reconciliation

Nine Months Ended September 30	2017			2016
CMS Energy, including Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.2
Accelerated flow-through of regulatory tax benefits2		(4.3)			(4.7)
Employee share-based awards		(0.9)			(0.8)
Other, net		(2.0)			(1.4)
Effective tax rate		30.1	%		32.3	%
Consumers
U.S. federal income tax rate		35.0	%		35.0	%
Increase (decrease) in income taxes from:
State and local income taxes, net of federal effect1		2.3			4.6
Accelerated flow-through of regulatory tax benefits2		(3.9)			(4.0)
Employee share-based awards		(0.8)			(0.7)
Other, net		(2.3)			(1.2)
Effective tax rate		30.3	%		33.7	%

1In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers’ electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy’s effective tax rate and a 2.2 percentage point reduction to Consumers’ effective tax rate.

2Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers’ recognition of the income tax benefits, reduced Consumers’ income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

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Earnings Per Share - CMS Energy (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share - CMS Energy [Abstract]

Basic And Diluted EPS Computations

In Millions, Except Per Share Amounts
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
Income available to common stockholders
Net income		$	172		$	186		$	464		$	475
Less income attributable to noncontrolling interests			-			-			1			1
Net income available to common stockholders – basic and diluted		$	172		$	186		$	463		$	474
Average common shares outstanding
Weighted-average shares – basic			280.8			278.2			279.8			277.7
Add dilutive nonvested stock awards			0.8			1.0			0.8			1.1
Weighted-average shares – diluted			281.6			279.2			280.6			278.8
Net income per average common share available to common stockholders
Basic		$	0.61		$	0.67		$	1.65		$	1.71
Diluted			0.61			0.67			1.65			1.70

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Cash And Cash Equivalents (Tables)

9 Months Ended

Sep. 30, 2017

Schedule Of Cash And Cash Equivalents, Including Restricted Amounts

In Millions
	September 30			December 31
	2017			2016
CMS Energy, including Consumers
Cash and cash equivalents		$	142		$	235
Restricted cash and cash equivalents			27			19
Other non-current assets			4			3
Cash and cash equivalents, including restricted amounts		$	173		$	257
Consumers
Cash and cash equivalents		$	55		$	131
Restricted cash and cash equivalents			27			19
Other non-current assets			3			2
Cash and cash equivalents, including restricted amounts		$	85		$	152

Schedule Of Restricted Cash Balances

In Millions
Nine Months Ended September 30	2016
CMS Energy, including Consumers
Change in:
Net cash used in investing activities		$	7
Cash and cash equivalents, including restricted amounts, end of period			29
Consumers
Change in:
Net cash used in investing activities		$	8
Cash and cash equivalents, including restricted amounts, end of period			29

Consumers Energy Company [Member]

Schedule Of Cash And Cash Equivalents, Including Restricted Amounts

In Millions
	September 30			December 31
	2017			2016
CMS Energy, including Consumers
Cash and cash equivalents		$	142		$	235
Restricted cash and cash equivalents			27			19
Other non-current assets			4			3
Cash and cash equivalents, including restricted amounts		$	173		$	257
Consumers
Cash and cash equivalents		$	55		$	131
Restricted cash and cash equivalents			27			19
Other non-current assets			3			2
Cash and cash equivalents, including restricted amounts		$	85		$	152

Schedule Of Restricted Cash Balances

In Millions
Nine Months Ended September 30	2016
CMS Energy, including Consumers
Change in:
Net cash used in investing activities		$	7
Cash and cash equivalents, including restricted amounts, end of period			29
Consumers
Change in:
Net cash used in investing activities		$	8
Cash and cash equivalents, including restricted amounts, end of period			29

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Reportable Segments (Tables)

9 Months Ended

Sep. 30, 2017

Schedule Of Financial Information By Reportable Segments

In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Enterprises			58			59			172			156
Other reconciling items			32			30			97			89
Total operating revenue – CMS Energy		$	1,527		$	1,587		$	4,805		$	4,759
Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Total operating revenue – Consumers		$	1,437		$	1,498		$	4,536		$	4,514
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Enterprises			8			8			27			17
Other reconciling items			(17)			(16)			(59)			(40)
Total net income available to common stockholders – CMS Energy		$	172		$	186		$	463		$	474
Consumers
Net income available to common stockholder
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Other reconciling items			-			1			-			1
Total net income available to common stockholder – Consumers		$	181		$	195		$	495		$	498

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Enterprises			164			157
Other reconciling items			33			30
Total plant, property, and equipment, gross – CMS Energy		$	21,966		$	21,010
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Other reconciling items			15			15
Total plant, property, and equipment, gross – Consumers		$	21,784		$	20,838
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,639		$	13,429
Gas utility1			6,701			6,446
Enterprises			280			269
Other reconciling items			1,500			1,478
Total assets – CMS Energy		$	22,120		$	21,622
Consumers
Total assets
Electric utility1		$	13,640		$	13,430
Gas utility1			6,701			6,446
Other reconciling items			39			70
Total assets – Consumers		$	20,380		$	19,946

1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.

Consumers Energy Company [Member]

Schedule Of Financial Information By Reportable Segments

In Millions
	Three Months Ended						Nine Months Ended
September 30	2017			2016			2017			2016
CMS Energy, including Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Enterprises			58			59			172			156
Other reconciling items			32			30			97			89
Total operating revenue – CMS Energy		$	1,527		$	1,587		$	4,805		$	4,759
Consumers
Operating revenue
Electric utility		$	1,247		$	1,313		$	3,360		$	3,348
Gas utility			190			185			1,176			1,166
Total operating revenue – Consumers		$	1,437		$	1,498		$	4,536		$	4,514
CMS Energy, including Consumers
Net income (loss) available to common stockholders
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Enterprises			8			8			27			17
Other reconciling items			(17)			(16)			(59)			(40)
Total net income available to common stockholders – CMS Energy		$	172		$	186		$	463		$	474
Consumers
Net income available to common stockholder
Electric utility		$	176		$	191		$	394		$	395
Gas utility			5			3			101			102
Other reconciling items			-			1			-			1
Total net income available to common stockholder – Consumers		$	181		$	195		$	495		$	498

In Millions
	September 30, 2017			December 31, 2016
CMS Energy, including Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Enterprises			164			157
Other reconciling items			33			30
Total plant, property, and equipment, gross – CMS Energy		$	21,966		$	21,010
Consumers
Plant, property, and equipment, gross
Electric utility1		$	15,056		$	14,540
Gas utility1			6,713			6,283
Other reconciling items			15			15
Total plant, property, and equipment, gross – Consumers		$	21,784		$	20,838
CMS Energy, including Consumers
Total assets
Electric utility1		$	13,639		$	13,429
Gas utility1			6,701			6,446
Enterprises			280			269
Other reconciling items			1,500			1,478
Total assets – CMS Energy		$	22,120		$	21,622
Consumers
Total assets
Electric utility1		$	13,640		$	13,430
Gas utility1			6,701			6,446
Other reconciling items			39			70
Total assets – Consumers		$	20,380		$	19,946

1Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.

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Regulatory Matters (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended							3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2017	Mar. 31, 2017	Feb. 28, 2017	Jan. 31, 2017	Sep. 30, 2016	Aug. 31, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Oct. 31, 2017
Public Utilities, General Disclosures [Line Items]
Regulatory liability current								$ 85		$ 85		$ 95
Accrued rate refunds								35		35		21
Revenue								1,527	$ 1,587	4,805	$ 4,759
Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory liability current								85		85		95
Accrued rate refunds								35		35		21
Revenue								1,437	$ 1,498	4,536	$ 4,514
2016 Electric Rate Case [Member] | Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Annual rate increase requested							$ 225
Rate of return on equity requested							10.70%
Annual rate increase self-implemented					$ 170
Annual rate increase authorized			$ 113
Rate of return on equity authorized			10.10%
2016 Electric Rate Case [Member] | Revenue Subject To Refund [Member] | Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory liability current								17		17
2016 Electric Rate Case [Member] | Revenue Subject To Refund [Member] | Consumers Energy Company [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory liability current													$ 17
Gas Rate Case [Member] | Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Annual rate increase requested						$ 90
Amended Annual Rate Increase Request		$ 80
Rate of return on equity requested						10.60%
Investment recovery, 2018	$ 18
Investment recovery, 2019	18
Annual rate increase self-implemented				$ 20
Annual rate increase authorized	$ 29
Energy Optimization [Member] | Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Authorized recovery/collection								$ 18		$ 18
Revenue												$ 18
Depreciation Rate Case [Member] | Consumers Energy Company [Member]
Public Utilities, General Disclosures [Line Items]
Annual rate increase authorized		$ (3)
FERC Transmission Order [Member] | Consumers Energy Company [Member] | Electric Transmission [Member]
Public Utilities, General Disclosures [Line Items]
Rate of return on equity authorized					10.32%	12.38%
Power Supply Cost Recover (PSCR) [Member] | Consumers Energy Company [Member] | Electric Transmission [Member]
Public Utilities, General Disclosures [Line Items]
Accrued rate refunds			$ 28

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Contingencies And Commitments (Contingencies And Commitments) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) lawsuit item	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Number of lawsuits settled | lawsuit	3
Regulatory assets	$ 2,038	$ 2,091
Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Regulatory assets	2,038	$ 2,091
Bay Harbor [Member]
Loss Contingencies [Line Items]
Demand for payment by USEPA	8
Accrual for environmental loss contingencies	$ 49
Discounted projected costs rate	4.34%
Remaining undiscounted obligation amount	$ 62
Accrual for environmental loss contingencies, inflation rate	1.00%
Electric Utility [Member] | NREPA [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 3
Electric Utility [Member] | NREPA [Member] | Minimum [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Remediation and other response activity costs	3
Electric Utility [Member] | NREPA [Member] | Maximum [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Remediation and other response activity costs	4
Electric Utility [Member] | CERCLA Liability [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	3
Electric Utility [Member] | CERCLA Liability [Member] | Minimum [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Remediation and other response activity costs	3
Electric Utility [Member] | CERCLA Liability [Member] | Maximum [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Remediation and other response activity costs	8
Gas Utility [Member] | NREPA [Member] | Maximum [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	1
Remediation and other response activity costs	3
Gas Utility [Member] | Manufactured Gas Plant [Member] | Consumers Energy Company [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 93
Discounted projected costs rate	2.57%
Remaining undiscounted obligation amount	$ 104
Number of former MGPs | item	23
Regulatory assets	$ 141
Authorized recovery, collection period	10 years
Accrual for environmental loss contingencies, inflation rate	2.50%
Equatorial Guinea Tax Claim [Member]
Loss Contingencies [Line Items]
Foreign government tax claim on sale	$ 152
Class Action Lawsuits [Member]
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit	4
Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit	1

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Contingencies And Commitments (Expected Remediation Cost By Year) (Details) $ in Millions	Sep. 30, 2017 USD ($)
Bay Harbor [Member]
Site Contingency [Line Items]
Undiscounted amount due within one year	$ 1
Undiscounted amount due within two year	4
Undiscounted amount due within third year	4
Undiscounted amount due within fourth year	4
Undiscounted amount due within five year	4
Undiscounted amount due within six year	4
Gas Utility [Member] | Manufactured Gas Plant [Member] | Consumers Energy Company [Member]
Site Contingency [Line Items]
Undiscounted amount due within one year	8
Undiscounted amount due within two year	16
Undiscounted amount due within third year	18
Undiscounted amount due within fourth year	10
Undiscounted amount due within five year	18
Undiscounted amount due within six year	$ 7

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Contingencies And Commitments (Guarantees) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Guarantees [Member]
Guarantees And Other Contingencies [Line Items]
Guarantee Description	Guarantees	[1]
Expiration Date	Indefinite	[1]
Maximum obligation	$ 45	[1]
Guarantees [Member] | Consumers Energy Company [Member]
Guarantees And Other Contingencies [Line Items]
Guarantee Description	Guarantee	[1]
Expiration Date	Indefinite	[1]
Maximum obligation	$ 30	[1]
Indemnity Obligations From Stock And Asset Sales Agreements [Member]
Guarantees And Other Contingencies [Line Items]
Guarantee Description	Indemnity obligations from stock and asset sales agreements	[2]
Expiration Date	Indefinite	[2]
Maximum obligation	$ 153	[2]
Carrying Amount	7	[2]
Tax And Other Indemnity Obligations [Member] | Consumers Energy Company [Member]
Guarantees And Other Contingencies [Line Items]
Carrying Amount	$ 1

[1] At Consumers, this obligation comprises a guarantee provided to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department's failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers' guarantee to the U.S. Department of Energy and CMS Energy's 1994 guarantee of non-recourse revenue bonds issued by Genesee.

[2] These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

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Financings And Capitalization (Narrative) (Details) - USD ($)	1 Months Ended	9 Months Ended
	Oct. 25, 2017	Sep. 30, 2017
Financing And Capitalization [Line Items]
Debt issuance		$ 885,000,000
Debt retirement, principal		430,000,000
Unrestricted retained earnings		4,500,000,000
Common stock dividends from Consumers		347,000,000
Term Loan [Member]
Financing And Capitalization [Line Items]
Debt issuance		$ 180,000,000
Debt instrument, extension term		1 year
CMS Energy [Member]
Financing And Capitalization [Line Items]
Debt issuance		$ 350,000,000
Consumers Energy Company [Member]
Financing And Capitalization [Line Items]
Debt issuance		535,000,000
Debt retirement, principal		430,000,000
Unrestricted retained earnings		1,100,000,000
Consumers Energy Company [Member] | Commercial Paper [Member]
Financing And Capitalization [Line Items]
Short-term debt, authorized borrowings		500,000,000
Short-term borrowings outstanding		$ 230,000,000
Consumers Energy Company [Member] | FMB's 3.21% Due 2017 [Member] | Subsequent Event [Member]
Financing And Capitalization [Line Items]
Debt retirement, principal	$ 100,000,000
Interest rate	3.21%

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Financings And Capitalization (Major Long-Term Debt Transactions) (Details) - USD ($)		1 Months Ended	9 Months Ended
		Nov. 30, 2017	Sep. 30, 2017
Debt Instrument [Line Items]
Principal Balance			$ 885,000,000
Debt retirement, principal			430,000,000
CMS Energy [Member]
Debt Instrument [Line Items]
Principal Balance			350,000,000
Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance			535,000,000
Debt retirement, principal			430,000,000
Senior Notes 3.450% Due August 2027 [Member] | CMS Energy [Member]
Debt Instrument [Line Items]
Principal Balance			$ 350,000,000
Interest rate			3.45%
Debt issuance date			February 2017
Maturity date			August 2027
FMB's 3.950% Due July 2047 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance			$ 350,000,000
Interest rate			3.95%
Debt issuance date			February 2017
Maturity date			July 2047
FMB's 3.180% Due September 2032 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance	[1]		$ 40,000,000
Interest rate	[1]		3.18%
Debt issuance date	[1]		September 2017
Maturity date	[1]		September 2032
FMB's 3.520% Due September 2037 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance	[1]		$ 125,000,000
Interest rate	[1]		3.52%
Debt issuance date	[1]		September 2017
Maturity date	[1]		September 2037
FMB's 3.860% Due September 2052 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance	[1]		$ 20,000,000
Interest rate	[1]		3.86%
Debt issuance date	[1]		September 2017
Maturity date	[1]		September 2052
FMB's 5.150% Due February 2017 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Debt retirement, principal			$ 250,000,000
Interest rate			5.15%
Debt retirement date			February 2017
Maturity date			February 2017
Senior Notes 6.875% Due March 2018 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Debt retirement, principal			$ 180,000,000
Interest rate			6.875%
Debt issuance date			September 2017
Maturity date			March 2018
Scenario, Forecast [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance		$ 300,000,000
Scenario, Forecast [Member] | FMB's 3.180% Due September 2032 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance		$ 60,000,000
Interest rate		3.18%
Maturity date		2032
Scenario, Forecast [Member] | FMB's 3.520% Due September 2037 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance		$ 210,000,000
Interest rate		3.52%
Maturity date		2037
Scenario, Forecast [Member] | FMB's 3.860% Due September 2052 [Member] | Consumers Energy Company [Member]
Debt Instrument [Line Items]
Principal Balance		$ 30,000,000
Interest rate		3.86%
Maturity date		2052

[1] These first mortgage bonds were issued in a September private placement under a bond purchase agreement executed in August. Under the agreement, Consumers will issue an additional $300 million of first mortgage bonds in a second private placement in November, consisting of $60 million of 3.18-percent first mortgage bonds due 2032, $210 million of 3.52-percent first mortgage bonds due 2037, and $30 million of 3.86-percent first mortgage bonds due 2052.

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Financings And Capitalization (Revolving Credit Facilities) (Details)	9 Months Ended
	Sep. 30, 2017 USD ($)
Revolving Credit Facilities May 27, 2022 [Member] | CMS Energy [Member]
Line of Credit Facility [Line Items]
Expiration Date	May 27, 2022	[1],[2]
Amount of Facility	$ 550,000,000	[1],[2]
Letters of Credit Outstanding	1,000,000	[1],[2]
Amount Available	549,000,000	[1],[2]
Average borrowings	$ 28,000,000
Weighted average interest rate	2.02%
Revolving Credit Facilities May 27, 2022 [Member] | Consumers Energy Company [Member]
Line of Credit Facility [Line Items]
Expiration Date	May 27, 2022	[2],[3]
Amount of Facility	$ 650,000,000	[2],[3]
Letters of Credit Outstanding	7,000,000	[2],[3]
Amount Available	$ 643,000,000	[2],[3]
Revolving Credit Facilities November 23, 2018 [Member] | Consumers Energy Company [Member]
Line of Credit Facility [Line Items]
Expiration Date	Nov. 23, 2018	[3]
Amount of Facility	$ 250,000,000	[3]
Amount Available	$ 250,000,000	[3]
Revolving Credit Facilities September 9, 2019 [Member] | Consumers Energy Company [Member]
Line of Credit Facility [Line Items]
Expiration Date	Sep. 09, 2019	[3],[4]
Amount of Facility	$ 30,000,000	[3],[4]
Letters of Credit Outstanding	$ 30,000,000	[3],[4]

[1] During the nine months ended September 30, 2017, CMS Energy's average borrowings totaled $28 million with a weighted-average interest rate of 2.02 percent. Obligations under this facility are secured by Consumers common stock.

[2] In May 2017, the expiration date of this revolving credit agreement was extended from May 2021 to May 2022.

[3] Obligations under this facility are secured by first mortgage bonds of Consumers.

[4] In June 2017, the expiration date of this letter of credit reimbursement agreement was extended from May 2018 to September 2019.

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Financings And Capitalization (Issuance Of Common Stock) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Jun. 30, 2017	Mar. 31, 2017
Financings And Capitalization [Abstract]
Stock Offering Program Maximum Value		$ 100
Number of Shares Issued	1,494,371
Average Price Per Share	$ 47.31
Net Proceeds	$ 70

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Fair Value Measurements (Assets And Liabilties Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	$ 21	$ 44
Restricted cash equivalents	[1]	27	19
Nonqualified deferred compensation plan assets	[1]	13	12
Commodity contracts	[1]	2	1
Total	[1]	212	220
Nonqualified deferred compensation plan liabilities	[1]	13	12
Commodity contracts	[1]	1
Total	[1]	14	12
Consumers Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash equivalents	[1]	27	19
Nonqualified deferred compensation plan assets	[1]	9	8
Commodity contracts	[1]	2	1
Total	[1]	167	165
Nonqualified deferred compensation plan liabilities	[1]	9	8
Commodity contracts	[1]	1
Total	[1]	10	8
DB SERP [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	4	3
DB SERP [Member] | Consumers Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	3	2
DB SERP [Member] | Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale - Fair Value	[1]	145	141
DB SERP [Member] | Mutual Fund [Member] | Consumers Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale - Fair Value	[1]	105	102
CMS Energy Common Stock [Member] | Consumers Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale - Fair Value	[1]	$ 21	$ 33

[1] All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

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Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financial Instruments [Line Items]
Portion of long-term debt supported by third-party credit enhancements	$ 103	$ 103
Consumers Energy Company [Member]
Financial Instruments [Line Items]
Portion of long-term debt supported by third-party credit enhancements	$ 103	$ 103

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Financial Instruments (Schedule Of Carrying Amounts And Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and accrued interest receivable		$ 197	$ 180
Other liabilities current		130	199
Current portion of long-term debt		959	864
DIG Note Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities current		1	1
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[2]	1,382	1,326
Securities held to maturity - Fair Value		16	13
Long-term debt, Fair Value	[3]	9,983	9,504
Long-term payables, Fair Value	[4]	18	17
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[2]	1,479	1,415
Securities held to maturity - Fair Value		16	13
Long-term debt, Fair Value	[3]	10,484	9,953
Long-term payables, Fair Value	[4]	18	17
Consumers Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and accrued interest receivable		30	29
Other liabilities current		93	164
Current portion of long-term debt		443	375
Consumers Energy Company [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[5]	46	45
Long-term debt, Fair Value	[6]	5,718	5,628
Consumers Energy Company [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[5]	46	45
Long-term debt, Fair Value	[6]	6,032	5,903
EnerBank [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current notes receivable		228	219
Other Receivables [Member] | Consumers Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts receivable, current		14	12
Fair Value, Inputs, Level 1 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]
Notes receivable, Fair Value	[2]
Securities held to maturity - Fair Value
Long-term debt, Fair Value	[3]
Long-term payables, Fair Value	[4]
Fair Value, Inputs, Level 1 [Member] | Consumers Energy Company [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]
Notes receivable, Fair Value	[5]
Long-term debt, Fair Value	[6]
Fair Value, Inputs, Level 2 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity - Fair Value		16	13
Long-term debt, Fair Value	[3]	9,331	8,990
Fair Value, Inputs, Level 2 [Member] | Consumers Energy Company [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, Fair Value	[6]	4,879	4,940
Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[2]	1,479	1,415
Long-term debt, Fair Value	[3]	1,153	963
Long-term payables, Fair Value	[4]	18	17
Fair Value, Inputs, Level 3 [Member] | Consumers Energy Company [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivable, fair Value	[1]	22	22
Notes receivable, Fair Value	[5]	46	45
Long-term debt, Fair Value	[6]	$ 1,153	$ 963

[1] Includes current accounts receivable of $14 million at September 30, 2017 and $12 million at December 31, 2016.

[2] Includes current portion of notes receivable of $228 million at September 30, 2017 and $219 million at December 31, 2016.

[3] Includes current portion of long-term debt of $959 million at September 30, 2017 and $864 million at December 31, 2016.

[4] Includes current portion of long-term payables of $1 million at September 30, 2017 and December 31, 2016.

[5] Includes current portion of notes receivable of $30 million at September 30, 2017 and $29 million at December 31, 2016.

[6] Includes current portion of long-term debt of $443 million at September 30, 2017 and $375 million at December 31, 2016.

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Financial Instruments (Schedule Of Investment Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Debt Securities [Member]
Investment Securities [Line Items]
Held to maturity securities - Cost	$ 16	$ 13
Held to maturity securities - Unrealized Gains
Held to maturity securities - Unrealized Losses
Held to maturity securities - Fair Value	16	13
CMS Energy Common Stock [Member] | Consumers Energy Company [Member]
Investment Securities [Line Items]
Available for sale - Cost	2	4
Available for sale - Unrealized Gains	19	29
Available for sale - Unrealized Losses
Available for sale - Fair Value	21	33
DB SERP [Member] | Mutual Fund [Member]
Investment Securities [Line Items]
Available for sale - Cost	142	141
Available for sale - Unrealized Gains	3
Available for sale - Unrealized Losses
Available for sale - Fair Value	145	141
DB SERP [Member] | Mutual Fund [Member] | Consumers Energy Company [Member]
Investment Securities [Line Items]
Available for sale - Cost	103	102
Available for sale - Unrealized Gains	2
Available for sale - Unrealized Losses
Available for sale - Fair Value	$ 105	$ 102

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Notes Receivable (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of notes receivable		$ 19
EnerBank notes receivable held for sale		31	$ 39
EnerBank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of notes receivable	$ 19
Unearned income		83	84
Delinquent loans		12	11
Loans modified as troubled debt restructurings		1	1
Receivables Held For Sale [Member] | EnerBank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
EnerBank notes receivable held for sale		31	39
Unearned income		$ 6	$ 8

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Notes Receivable (Schedule Of Current And Non-Current Notes Receivable) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current notes receivable	$ 197	$ 180
EnerBank notes receivable held for sale	31	39
Total notes receivable	1,382	1,326
Consumers Energy Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current notes receivable	30	29
Total notes receivable	46	45
EnerBank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Noncurrent notes receivable	1,134	1,088
Receivables, Net Of Allowance For Loan Losses [Member] | EnerBank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current notes receivable	167	151
Receivables Held For Sale [Member] | EnerBank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
EnerBank notes receivable held for sale	31	39
Michigan Tax Settlement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current notes receivable	30	29
Noncurrent notes receivable	20	19
Michigan Tax Settlement [Member] | Consumers Energy Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current notes receivable	30	29
Noncurrent notes receivable	$ 16	$ 16

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Retirement Benefits (Schedule Of Net Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
DB Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12	$ 10	$ 34	$ 31
Interest cost	23	21	67	64
Expected return on plan assets	(39)	(36)	(115)	(110)
Amortization of Net loss	20	17	60	52
Amortization of Prior service cost (credit)	1	1	3	3
Net periodic cost (credit)	17	13	49	40
DB Pension Plan [Member] | Consumers Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	11	11	33	31
Interest cost	22	20	65	62
Expected return on plan assets	(38)	(35)	(112)	(107)
Amortization of Net loss	19	16	58	50
Amortization of Prior service cost (credit)	1	1	3	3
Net periodic cost (credit)	15	13	47	39
OPEB Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	5	15	14
Interest cost	13	12	39	35
Expected return on plan assets	(22)	(22)	(67)	(65)
Amortization of Net loss	7	5	23	16
Amortization of Prior service cost (credit)	(8)	(10)	(26)	(31)
Net periodic cost (credit)	(5)	(10)	(16)	(31)
OPEB Plan [Member] | Consumers Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	4	14	13
Interest cost	12	12	38	34
Expected return on plan assets	(21)	(20)	(63)	(60)
Amortization of Net loss	8	5	24	16
Amortization of Prior service cost (credit)	(8)	(10)	(25)	(30)
Net periodic cost (credit)	$ (4)	$ (9)	$ (12)	$ (27)

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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Line Items]
U.S. federal income tax rate		35.00%	35.00%
State and local income taxes, net of federal effect	[1]	2.30%	4.20%
Accelerated flow-through of regulatory tax benefits	[2]	(4.30%)	(4.70%)
Employee share-based awards		(0.90%)	(0.80%)
Other, net		(2.00%)	(1.40%)
Effective tax rate		30.10%	32.30%
Income tax benefit		$ 15
Income tax benefit, percent		(2.30%)
Consumers Energy Company [Member]
Income Taxes [Line Items]
U.S. federal income tax rate		35.00%	35.00%
State and local income taxes, net of federal effect	[1]	2.30%	4.60%
Accelerated flow-through of regulatory tax benefits	[2]	(3.90%)	(4.00%)
Employee share-based awards		(0.80%)	(0.70%)
Other, net		(2.30%)	(1.20%)
Effective tax rate		30.30%	33.70%
Income tax benefit		$ 16
Income tax benefit, percent		(2.20%)
Reduction of income tax expense		$ 28	$ 30

[1] In September 2017, CMS Energy completed the evaluation of its methodology for the state apportionment of Consumers' electricity sales to MISO, taking into account recent state tax law developments in the electric utility sector. As a result, CMS Energy intends to amend state income tax filings for 2013 through 2016 to seek a refund of taxes previously paid. To recognize the anticipated refund and the impact of the expected lower effective tax rate on their deferred state tax liabilities, CMS Energy recorded a $15 million income tax benefit and Consumers recorded a $16 million income tax benefit in September 2017. Both amounts are net of reserves for uncertain tax positions. For the nine months ended September 30, 2017, the impact of the benefit was a 2.3 percentage point reduction to CMS Energy's effective tax rate and a 2.2 percentage point reduction to Consumers' effective tax rate.

[2] Since 2014, Consumers has followed a regulatory treatment ordered by the MPSC that accelerates the return of certain income tax benefits to customers. This change, which also accelerates Consumers' recognition of the income tax benefits, reduced Consumers' income tax expense by $28 million for the nine months ended September 30, 2017 and by $30 million for the nine months ended September 30, 2016.

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Earnings Per Share - CMS Energy (Basic And Diluted EPS Computations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share - CMS Energy [Abstract]
Net Income	$ 172	$ 186	$ 464	$ 475
Less income attributable to noncontrolling interest			1	1
Net Income Available to Common Stockholders	$ 172	$ 186	$ 463	$ 474
Weighted average shares - basic	280.8	278.2	279.8	277.7
Add dilutive nonvested stock awards	0.8	1.0	0.8	1.1
Weighted average shares - diluted	281.6	279.2	280.6	278.8
Basic	$ 0.61	$ 0.67	$ 1.65	$ 1.71
Diluted	$ 0.61	$ 0.67	$ 1.65	$ 1.70

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Cash And Cash Equivalents (Schedule Of Cash And Cash Equivalents, Including Restricted Amounts) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 142	$ 235
Restricted cash and cash equivalents	27	19
Other non-current assets	4	3
Cash and cash equivalents, including restricted amounts	173	257	$ 368	$ 288
Consumers Energy Company [Member]
Cash and cash equivalents	55	131
Restricted cash and cash equivalents	27	19
Other non-current assets	3	2
Cash and cash equivalents, including restricted amounts	$ 85	$ 152	$ 50	$ 71

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Cash And Cash Equivalents (Schedule Of Restricted Cash Balances) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities	$ (1,354)	$ (1,398)
Cash and cash equivalents, including restricted amounts, end of period	173	368	$ 257	$ 288
Consumers Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities	(1,278)	(1,301)
Cash and cash equivalents, including restricted amounts, end of period	$ 85	50	$ 152	$ 71
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities		7
Cash and cash equivalents, including restricted amounts, end of period		29
New Accounting Pronouncement, Early Adoption, Effect [Member] | Consumers Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities		8
Cash and cash equivalents, including restricted amounts, end of period		$ 29

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Reportable Segments (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating Revenue		$ 1,527	$ 1,587	$ 4,805	$ 4,759
Net Income Attributable to CMS Energy		172	186	463	474
Plant, property, and equipment, gross		21,966		21,966		$ 21,010
Total Assets		22,120		22,120		21,622
Consumers Energy Company [Member]
Segment Reporting Information [Line Items]
Operating Revenue		1,437	1,498	4,536	4,514
Net income available to common stockholder		181	195	495	498
Plant, property, and equipment, gross		21,784		21,784		20,838
Total Assets		20,380		20,380		19,946
Electric Utility [Member]
Segment Reporting Information [Line Items]
Operating Revenue		1,247	1,313	3,360	3,348
Net Income Attributable to CMS Energy		176	191	394	395
Plant, property, and equipment, gross	[1]	15,056		15,056		14,540
Total Assets	[1]	13,639		13,639		13,429
Electric Utility [Member] | Consumers Energy Company [Member]
Segment Reporting Information [Line Items]
Operating Revenue		1,247	1,313	3,360	3,348
Net income available to common stockholder		176	191	394	395
Plant, property, and equipment, gross	[1]	15,056		15,056		14,540
Total Assets	[1]	13,640		13,640		13,430
Gas Utility [Member]
Segment Reporting Information [Line Items]
Operating Revenue		190	185	1,176	1,166
Net Income Attributable to CMS Energy		5	3	101	102
Plant, property, and equipment, gross	[1]	6,713		6,713		6,283
Total Assets	[1]	6,701		6,701		6,446
Gas Utility [Member] | Consumers Energy Company [Member]
Segment Reporting Information [Line Items]
Operating Revenue		190	185	1,176	1,166
Net income available to common stockholder		5	3	101	102
Plant, property, and equipment, gross	[1]	6,713		6,713		6,283
Total Assets	[1]	6,701		6,701		6,446
Enterprises [Member]
Segment Reporting Information [Line Items]
Operating Revenue		58	59	172	156
Net Income Attributable to CMS Energy		8	8	27	17
Plant, property, and equipment, gross		164		164		157
Total Assets		280		280		269
Other reconciling items [Member]
Segment Reporting Information [Line Items]
Operating Revenue		32	30	97	89
Net Income Attributable to CMS Energy		(17)	(16)	(59)	(40)
Plant, property, and equipment, gross		33		33		30
Total Assets		1,500		1,500		1,478
Other reconciling items [Member] | Consumers Energy Company [Member]
Segment Reporting Information [Line Items]
Net income available to common stockholder			$ 1		$ 1
Plant, property, and equipment, gross		15		15		15
Total Assets		$ 39		$ 39		$ 70

[1] Amounts include a portion of Consumers' other common assets attributable to both the electric and gas utility businesses.