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Reportable Segments
 9 Months Ended
Sep. 30, 2023
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.

As of September 30, 2023, reportable segments by Registrant were as follows:

CenterPoint Energy

•CenterPoint Energy’s Electric reportable segment consisted of electric transmission and distribution services in the Texas gulf coast area in the ERCOT region and electric transmission and distribution services primarily to southwestern Indiana and includes power generation and wholesale power operations in the MISO region.

•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 Indiana, Louisiana, Minnesota, Mississippi, Ohio and Texas; and (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP.

•CenterPoint Energy’s Corporate and Other category consists of energy performance contracting and sustainable infrastructure services through Energy Systems Group through June 30, 2023, the date of the sale of Energy Systems Group, and corporate operations which support all of the business operations of CenterPoint Energy.
Houston Electric

•Houston Electric’s single reportable segment consisted 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 following the Restructuring consisted of (i) intrastate natural gas sales to, and natural gas transportation and distribution for, residential, commercial, industrial and institutional customers in Indiana, Louisiana, Minnesota, Mississippi, Ohio and Texas; and (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP.

Financial data for reportable segments is as follows:

CenterPoint Energy
Three Months Ended September 30,
20232022
Revenues from
External
Customers		Net Income (Loss)Revenues from
External
Customers		Net Income (Loss)
(in millions)
Electric$1,261 (1)$290 $1,146 (1)$234 
Natural Gas 597 27 692 (10)
Corporate and Other2 (35)65 (22)
Consolidated$1,860 $282 $1,903 $202 
Nine Months Ended September 30,
20232022
Revenues from
External
Customers		Net Income (Loss)Revenues from
External
Customers		Net Income
(in millions)
Electric$3,250 (1)$593 $3,092 (1)$489 
Natural Gas 3,136 296 3,334 416 
Corporate and Other128 (164)184 18 
Consolidated$6,514 $725 $6,610 $923 

(1)Houston Electric revenues from major external customers are as follows (CenterPoint Energy and Houston Electric):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
(in millions)
Affiliates of NRG$370 $327 $826 $797 
Affiliates of Vistra Energy Corp.177 153 403 372 

Total Assets
September 30, 2023December 31, 2022
(in millions)
Electric$21,130 $19,024 
Natural Gas 16,802 18,043 
Corporate and Other, net of eliminations (1)
1,069 1,479 
Consolidated$39,001 $38,546 

(1)Total assets included pension and other postemployment-related regulatory assets of $379 million and $405 million as of September 30, 2023 and December 31, 2022, 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.