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Goodwill and Other Intangibles (CenterPoint Energy and CERC) | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangibles (CenterPoint Energy and CERC) | Goodwill and Other Intangibles (CenterPoint Energy and CERC) Goodwill (CenterPoint Energy and CERC) 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 |
When a disposal group reflects a component of a reporting unit and meets the definition of a business, the goodwill within that reporting unit is allocated to the disposal group based on the relative fair value of the components representing a business that will be retained and disposed. As described further in Note 3, certain assets and liabilities of Energy Systems Group, including goodwill of $134 million at CenterPoint Energy, were disposed of upon consummation of the sale of Energy Systems Group in the second quarter of 2023. The disposal of goodwill attributable to Energy Systems Group was reflected in the loss on sale of $12 million during the nine months ended September 30, 2023. CenterPoint Energy and CERC perform goodwill impairment tests at least annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. The impairment evaluation for goodwill is performed by comparing the fair value of each reporting unit with the carrying amount of the reporting unit, including goodwill. The reporting units approximate the reportable segments. The estimated fair value of the reporting unit is primarily determined based on an income approach or a weighted combination of income and market approaches. If the carrying amount is in excess of the estimated fair value of the reporting unit, then the excess amount is recorded as an impairment charge, not to exceed the carrying amount of goodwill. CenterPoint Energy and CERC performed their annual goodwill impairment tests in the third quarter of 2023 and determined that no goodwill impairment charge was required for any reporting unit as a result of those tests. Other Intangibles (CenterPoint Energy) 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.
| 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 |  |
CenterPoint Energy estimates that amortization expense of intangible assets with finite lives for the next five years will not be significant

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