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Reportable Segments
 6 Months Ended
Jun. 30, 2021
Segment Reporting [Abstract]  
Reportable Segments Reportable Segments
The Registrants’ determination of reportable segments considers the strategic operating units under which its CODM manages sales, allocates resources and assesses performance of various products and services to wholesale or retail customers in differing regulatory environments. Each Registrant’s CODM views net income as the measure of profit or loss for the reportable segments. Certain prior year amounts have been reclassified to conform to the current year reportable segment presentation described in the Registrants’ combined 2020 Form 10-K.

As of June 30, 2021, reportable segments by Registrant were as follows:

CenterPoint Energy

•CenterPoint Energy’s Electric reportable segment consists of (i) electric transmission services to transmission service customers in the ERCOT region and distribution services to REPs serving the Texas Gulf Coast area and (ii) electric transmission and distribution services primarily to southwestern Indiana and includes power generation and wholesale power operations.

•CenterPoint Energy’s Natural Gas 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; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES.

•CenterPoint Energy’s Midstream Investments reportable segment consists of the equity investment in Enable (excluding the Enable Series A Preferred Units). See Note 9 regarding the Enable Merger.

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.

Houston Electric

•Houston Electric’s single reportable segment consists of electric transmission services to transmission service customers in the ERCOT region and distribution services to REPs serving the Texas Gulf Coast area.

CERC

•CERC’s single 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; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES.

On April 29, 2021, CenterPoint Energy, through its subsidiary CERC Corp., entered into an Asset Purchase Agreement to sell its Arkansas and Oklahoma Natural Gas businesses. The Arkansas and Oklahoma Natural Gas businesses are reflected in CenterPoint Energy’s Natural Gas reportable segment and CERC’s single reportable segment, as applicable, and are classified as held for sale as of June 30, 2021. See Note 3 for further details.
Financial data for reportable segments is as follows, including Corporate and Other, and Discontinued Operations for reconciliation purposes:

CenterPoint Energy
Three Months Ended June 30,
20212020
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)
Electric$937 (1)$— $125 $848 (1)$— $106 
Natural Gas 740 — 74 644 — 30 
Midstream Investments— 67 54 — 43 24 
Corporate and Other65 — (2)83 — (25)
Continuing Operations$1,742 $67 251 $1,575 $43 135 
Discontinued Operations, net— (30)
Consolidated$251 $105 
Six Months Ended June 30,
20212020
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)
Electric$1,767 (1)$— $200 $1,615 (1)$— $(28)
Natural Gas 2,403 — 303 1,965 — 231 
Midstream Investments (2)
— 175 125 — (1,432)(1,103)
Corporate and Other119 — (14)162 — (18)
Continuing Operations$4,289 $175 614 $3,742 $(1,432)(918)
Discontinued Operations, net— (176)
Consolidated$614 $(1,094)

(1)Houston Electric revenues from major external customers are as follows (CenterPoint Energy and Houston Electric):
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
(in millions)
Affiliates of NRG$192 $174 $387 $330 
Affiliates of Vistra Energy Corp.87 92 175 173 

(2)Includes the impairment of CenterPoint Energy’s equity method investment in Enable of $1,541 million recorded during the six months ended June 30, 2020.
Total Assets
June 30, 2021December 31, 2020
(in millions)
Electric$15,288 $14,493 
Natural Gas 15,064 14,976 
Midstream Investments1,051 913 
Corporate and Other, net of eliminations (1)
2,871 3,089 
Continuing Operations34,274 33,471 
Assets Held for Sale2,192 — 
Consolidated$36,466 $33,471 
(1)Total assets included pension and other postemployment-related regulatory assets of $525 million and $540 million as of June 30, 2021 and December 31, 2020, respectively.

Houston Electric

Houston Electric consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included.

CERC

CERC consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included.