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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2025
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | The Registrants reported the following effective tax rates:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
CenterPoint Energy (1) | (2) | % |  | 21 | % |  | 14 | % |  | 18 | %
Houston Electric (2) | 18 | % |  | 19 | % |  | 19 | % |  | 19 | %
CERC (3) | (222) | % |  | 21 | % |  | 11 | % |  | 20 | %
(1)CenterPoint Energy’s lower effective tax rate for the three months ended September 30, 2025 compared to the three months ended September 30, 2024 was primarily driven by a $74 million net benefit from state apportionment changes, resulting in a remeasurement of state deferred taxes. This benefit is partially offset by the impact of non-deductible goodwill associated with the sale of the Louisiana and Mississippi natural gas LDC businesses. CenterPoint Energy’s lower effective tax rate for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024 was primarily driven by a $74 million net benefit from state apportionment changes, resulting in a remeasurement of state deferred taxes. This benefit is partially offset by the impact of non-deductible goodwill associated with the sale of the Louisiana and Mississippi natural gas LDC businesses and the absence of impacts associated with the state deferred tax remeasurement and valuation allowance related to the Louisiana and Mississippi natural gas LDC businesses recorded in 2024 upon classification as held for sale. For additional detail, see Note 3. (2)Houston Electric’s lower effective tax rate for the three months ended September 30, 2025 compared to the three months ended September 30, 2024 was primarily driven by a decrease in state income taxes. (3)CERC’s lower effective tax rate for the three months ended September 30, 2025 compared to the three months ended September 30, 2024 was primarily driven by a $73 million net benefit from state apportionment changes, resulting in a remeasurement of state deferred taxes. This benefit is partially offset by the impact of non-deductible goodwill associated with the sale of the Louisiana and Mississippi natural gas LDC businesses. CERC’s lower effective tax rate for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024 was primarily driven by a $73 million net benefit from state apportionment changes, resulting in a remeasurement of state deferred taxes. This benefit is partially offset by the impact of non-deductible goodwill associated with the sale of the Louisiana and Mississippi natural gas LDC businesses and the absence of impacts associated with the state deferred tax remeasurement and valuation allowance related to the Louisiana and Mississippi natural gas LDC businesses recorded in 2024 upon classification as held for sale. For additional detail, see Note 3.

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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