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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2024
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | The Registrants reported the following effective tax rates:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
CenterPoint Energy (1) | 13 | % |  | 46 | % |  | 16 | % |  | 29 | %
Houston Electric (2) | 20 | % |  | 21 | % |  | 20 | % |  | 22 | %
CERC (3) | 24 | % |  | 20 | % |  | 19 | % |  | 22 | %
(1)CenterPoint Energy’s lower effective tax rate for the three months ended June 30, 2024 compared to the three months ended June 30, 2023 was primarily due to the absence of impacts associated with the sale of Energy Systems Group recorded in 2023 and a decrease in state income taxes. CenterPoint Energy’s lower effective tax rate for the six months ended June 30, 2024 compared to the six months ended June 30, 2023 was primarily due to the absence of impacts associated with the sale of Energy Systems Group recorded in 2023, a decrease in state income taxes, and the tax impacts of the state deferred remeasurement benefit of $25 million related to the Louisiana and Mississippi natural gas LDC businesses sale, which met the held for sale criteria in the first quarter of 2024 and is described further below, partially offset by the tax impacts of the valuation allowance of $21 million established against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale. See Note 3 for further details. (2)Houston Electric’s lower effective tax rate for the three and six months ended June 30, 2024 compared to the same period ended June 30, 2023 was primarily driven by a decrease in state income taxes. (3)CERC’s higher effective tax rate for the three months ended June 30, 2024 compared to the three months ended June 30, 2023 was primarily driven by an increase in state income taxes. CERC’s lower effective tax rate for the six months ended June 30, 2024 compared to the six months ended June 30, 2023 was primarily driven by the tax impacts of the state deferred remeasurement benefit of $24 million associated with the Louisiana and Mississippi natural gas LDC businesses sale meeting the held for sale criteria in the first quarter of 2024. For tax purposes, when the held for sale criteria is met, the CERC and unitary state apportionment rates must be updated to account for the sale and applied to the estimated post-sale net deferred tax liability. This impact was partially offset by the tax impacts of a valuation allowance of $21 million against Louisiana and Mississippi NOLs, since those NOLs will not be utilized due to the Louisiana and Mississippi natural gas LDC businesses sale.

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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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