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Goodwill and Other Intangibles (CenterPoint Energy and CERC) (Tables) | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | CenterPoint Energy’s goodwill by reportable segment is as follows:
|  | December 31, 2022 |  |  |  | Disposals |  | September 30, 2023
|  | (in millions)
Electric (1) |  | $ | 936 |  |  |  |  | $ | — |  |  | $ | 936 |
Natural Gas |  | 2,920 |  |  |  |  | — |  |  | 2,920 |
Corporate and Other |  | 438 |  |  |  |  | 134 |  | (2) |  | 304 |
Total |  | $ | 4,294 |  |  |  |  | $ | 134 |  |  | $ | 4,160 |
(1)Amount presented is net of the accumulated goodwill impairment charge of $185 million recorded in 2020. (2)Represents goodwill attributable to the sale of Energy Systems Group. For further information, see Note 3. CERC’s goodwill as of both September 30, 2023 and December 31, 2022 is as follows:
|  |  |  |  |  |  |  | (in millions)
Goodwill |  |  |  |  |  |  |  | $ | 1,583 |
Schedule of Finite-Lived Intangible Assets | The tables below present information on CenterPoint Energy’s intangible assets, excluding goodwill, recorded in Other non-current assets on CenterPoint Energy’s Condensed Consolidated Balance Sheets and the related amortization expense included in Depreciation and amortization on CenterPoint Energy’s Condensed Statements of Consolidated Income. The intangible assets and associated amortization expense are primarily related to Energy Systems Group prior to the completion of the sale in June 2023 as indicated below. See Note 3 for further information.
|  | September 30, 2023 |  | December 31, 2022
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Balance |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Balance
|  | (in millions)
Customer relationships (1) |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 33 |  |  | $ | (16) |  |  | $ | 17 |
Trade names (1) |  | — |  |  | — |  |  | — |  |  | 16 |  |  | (6) |  |  | 10 |
Operation and maintenance agreements (1) (2) |  | — |  |  | — |  |  | — |  |  | 12 |  |  | (2) |  |  | 10 |
Other |  | 2 |  |  | (1) |  |  | 1 |  |  | 2 |  |  | (1) |  |  | 1 |
Total |  | $ | 2 |  |  | $ | (1) |  |  | $ | 1 |  |  | $ | 63 |  |  | $ | (25) |  |  | $ | 38 |
(1)Related to Energy Systems Group prior to the completion of the sale in June 2023. Amortization ceased at June 30, 2023, the end of the quarter in which the held for sale criteria was met. See Note 3 for further information. (2)Amortization expense related to the operation and maintenance agreements is included in Non-utility cost of revenues, including natural gas on CenterPoint Energy’s Condensed Statements of Consolidated Income. Amortization ceased at June 30, 2023, the end of the quarter in which the held for sale criteria was met. See Note 3 for further information.
Schedule of Finite-lived Intangible Assets Amortization Expense |
| Three Months Ended September 30, |  | Nine Months Ended September 30, |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
| (in millions) |
Amortization expense of intangible assets recorded in Depreciation and amortization | $ | — |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 4 |  |

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