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Reportable Segments (Tables) | 9 Months Ended
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Sep. 30, 2023
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment | Financial data for reportable segments is as follows: CenterPoint Energy
| Three Months Ended September 30, |  |  |  |  |  |  |
| 2023 |  | 2022 |  |  |  |  |  |  |
| 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 Other | 2 |  |  |  |  | (35) |  |  | 65 |  |  |  |  | (22) |  |  |  |  |  |  |  |
Consolidated | $ | 1,860 |  |  |  |  | $ | 282 |  |  | $ | 1,903 |  |  |  |  | $ | 202 |  |  |  |  |  |  |  |
| Nine Months Ended September 30, |  |  |  |  |  |  |
| 2023 |  | 2022 |  |  |  |  |  |  |
| 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 Other | 128 |  |  |  |  | (164) |  |  | 184 |  |  |  |  | 18 |  |  |  |  |  |  |  |
Consolidated | $ | 6,514 |  |  |  |  | $ | 725 |  |  | $ | 6,610 |  |  |  |  | $ | 923 |  |  |  |  |  |  |  |
| Total Assets
| September 30, 2023 |  | December 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.
Schedule of Revenue by Major Customers by Reporting Segments | 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,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
|  | (in millions)
Affiliates of NRG |  | $ | 370 |  |  | $ | 327 |  |  | $ | 826 |  |  | $ | 797 |
Affiliates of Vistra Energy Corp. |  | 177 |  |  | 153 |  |  | 403 |  |  | 372 |

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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