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Supplemental Disclosure of Cash Flow and Balance Sheet Information - Schedule of Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest, net of capitalized interest | $ 805 | $ 664 | $ 480
Income tax payments (refunds), net | (9) | 215 | 421
Accounts payable related to capital expenditures | 467 | 246 | 335
ROU assets obtained in exchange for lease liabilities | 18 | 3 | 7
Recovery of Extraordinary Gas Costs |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Income taxes paid |  | 215 |
Houston Electric |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest, net of capitalized interest | 321 | 287 | 223
Income tax payments (refunds), net | 26 | 12 | 142
Accounts payable related to capital expenditures | 381 | 166 | 168
ROU assets obtained in exchange for lease liabilities | 0 | 1 | 6
CERC |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest, net of capitalized interest | 190 | 175 | 104
Income tax payments (refunds), net | 3 | 115 | 37
Accounts payable related to capital expenditures | 103 | 74 | 139
ROU assets obtained in exchange for lease liabilities | $ 13 | $ 0 | $ 0

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