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Reportable Segments
 9 Months Ended
Sep. 30, 2020
Segment Reporting [Abstract]  
Reportable Business Segments [Text Block] Reportable Segments
The Registrants’ determination of reportable segments considers the strategic operating units under which the Registrants’ CODM manages sales, allocates resources and assesses performance of various products and services to wholesale or retail customers in differing regulatory environments. As of January 1, 2020, each Registrant’s CODM views net income as the measure of profit or loss for the reportable segments rather than the previous measure of operating income. Certain prior year amounts have been reclassified to conform to the current year presentation.

As of September 30, 2020, reportable segments by Registrant were as follows:
RegistrantHouston Electric T&D Indiana Electric IntegratedNatural Gas Distribution Midstream Investments
CenterPoint EnergyXXXX
Houston ElectricX
CERCX

•CenterPoint Energy’s and Houston Electric’s Houston Electric T&D reportable segment consists of electric transmission and distribution services in the Texas Gulf Coast area.

•CenterPoint Energy’s Indiana Electric Integrated reportable segment consists of electric transmission and distribution services primarily to southwestern Indiana and includes power generation and wholesale power operations.

•CenterPoint Energy’s Natural Gas Distribution reportable segment consists of (i) intrastate natural gas sales to, and natural gas transportation and distribution for residential, commercial, industrial and institutional customers in Arkansas, Indiana, Louisiana, Minnesota, Mississippi, Ohio, Oklahoma and Texas; (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP, formerly included in the Energy Services reportable segment; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES, formerly included in the Energy Services reportable segment.

•CERC’s Natural Gas Distribution reportable segment consists of (i) intrastate natural gas sales to, and natural gas transportation and distribution for residential, commercial, industrial and institutional customers in Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma and Texas; (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP, formerly included in the Energy Services reportable segment; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES, formerly included in the Energy Services reportable segment.

•CenterPoint Energy’s Midstream Investments reportable segment consists of the equity investment in Enable (excluding the Enable Series A Preferred Units).

CenterPoint Energy’s Corporate and Other consists of energy performance contracting and sustainable infrastructure services through ESG and other corporate operations which support all of the business operations of CenterPoint Energy. CERC’s Corporate and Other consists primarily of corporate operations which support all of the business operations of CERC.

Discontinued Operations (CenterPoint Energy and CERC)

On February 3, 2020, CenterPoint Energy, through its subsidiary VUSI, entered into the Securities Purchase Agreement to sell the Infrastructure Services Disposal Group, which consists of underground pipeline construction and repair services. Accordingly, the previously reported Infrastructure Services reportable segment has been eliminated. The transaction closed on April 9, 2020. See Note 3 for further information.

Additionally, on February 24, 2020, CenterPoint Energy, through its subsidiary CERC Corp., entered into the Equity Purchase Agreement to sell the Energy Services Disposal Group, which consists of non-rate regulated natural gas sales and service operations. Accordingly, the previously reported Energy Services reportable segment has been eliminated. The transaction closed on June 1, 2020. See Note 3 for further information.
Financial data for reportable segments is as follows, including Corporate and Other, Eliminations and Discontinued Operations for reconciliation purposes:

CenterPoint Energy
Three Months Ended September 30,
20202019
Revenues from
External
Customers		Equity in Earnings of Unconsolidated AffiliatesNet Income (Loss)Revenues from
External
Customers		Equity in Earnings of Unconsolidated AffiliatesNet Income (Loss)
(in millions)
Houston Electric T&D$828 (1)$— $157 $859 (1)$— $185 
Indiana Electric Integrated157 — 31 165 — 34 
Natural Gas Distribution560 — 5 541 — 6 
Midstream Investments (2)
— (67)(62)— 77 50 
Corporate and Other77 — (4)93 — (24)
Continuing Operations$1,622 $(67)127 $1,658 $77 251 
Discontinued Operations, net(6)19 
Consolidated$121 $270 
Nine Months Ended September 30,
20202019
Revenues from
External
Customers		Equity in Earnings of Unconsolidated AffiliatesNet Income (Loss)Revenues from
External
Customers		Equity in Earnings of Unconsolidated AffiliatesNet Income (Loss)
(in millions)
Houston Electric T&D$2,186 (1)$— $281 $2,313 (1)$— $315 
Indiana Electric Integrated414 — (121)388 — 41 
Natural Gas Distribution2,519 — 242 2,629 — 149 
Midstream Investments (2)
— (1,499)(1,165)— 213 124 
Corporate and Other245 — (28)215 — (84)
Continuing Operations$5,364 $(1,499)(791)$5,545 $213 545 
Discontinued Operations, net(182)89 
Consolidated$(973)$634 
(1)Houston Electric T&D’s revenues from major external customers are as follows (CenterPoint Energy and Houston Electric):
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(in millions)
Affiliates of NRG$243 $231 $573 $547 
Affiliates of Vistra Energy Corp.128 83 301 196 

(2)Includes the impairment of CenterPoint Energy’s equity method investment in Enable of $1,541 million recorded during the nine months ended September 30, 2020 and CenterPoint Energy’s interest in Enable’s $225 million impairment on an equity method investment during the three and nine months ended September 30, 2020.
Houston Electric consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included herein.
CERC
Three Months Ended September 30,
20202019
Revenues from
External
Customers		Net Income (Loss)Revenues from
External
Customers		 Net Income (Loss)
(in millions)
Natural Gas Distribution$422 $1 $415 $5 
Corporate and Other4 (7)5 (15)
Continuing Operations$426 (6)$420 (10)
Discontinued Operations, net2 3 
Consolidated$(4)$(7)
Nine Months Ended September 30,
20202019
Revenues from
External
Customers		Net Income (Loss)Revenues from
External
Customers		 Net Income (Loss)
(in millions)
Natural Gas Distribution$1,910 $155 $2,152 $134 
Corporate and Other10 (13)6 (32)
Continuing Operations$1,920 142 $2,158 102 
Discontinued Operations, net(66)57 
Consolidated$76 $159 
CenterPoint Energy and CERC
Total Assets
September 30, 2020December 31, 2019
CenterPoint
Energy		CERCCenterPoint
Energy		CERC
(in millions)
Houston Electric T&D$11,296 $— $11,264 $— 
Indiana Electric Integrated 3,142 — 3,168 — 
Natural Gas Distribution 14,297 7,809 14,105 7,698 
Midstream Investments805 — 2,473 — 
Corporate and Other, net of eliminations3,165 (30)2,555 (90)
Continuing Operations32,705 7,779 33,565 7,608 
Assets Held for Sale— — 1,964 904 
Consolidated$32,705 $7,779 $35,529 $8,512