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Income Taxes (Income Tax Expense for Continuing Operations Including Noncontrolling Interests) (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Current: |  |  |  |
Federal |  | $ (385) | $ (76) | $ (301)
State |  | (99) | 27 | 13
Total current expense (benefit) |  | (484) | (49) | (288)
Deferred: |  |  |  |
Taxes before operating loss carryforwards and investment tax credits |  | 760 | 95 | 558
Tax utilization expense of operating loss carryforwards |  | 45 | 35 | 42
State |  | 282 | 73 | (49)
Total deferred expense |  | 1,087 | 203 | 551
Investment tax credits |  | (28) | (41) | (444)
Income tax expense (benefit) | $ 173 | 575 | 113 | (181)
Virginia Electric and Power Company |  |  |  |
Current: |  |  |  |
Federal |  | (116) | 17 | 67
State |  | 6 | (17) | (13)
Total current expense (benefit) |  | (110) | 0 | 54
Deferred: |  |  |  |
Taxes before operating loss carryforwards and investment tax credits |  | 406 | 215 | 294
Tax utilization expense of operating loss carryforwards |  | 0 | 0 | 0
State |  | 107 | 108 | 116
Total deferred expense |  | 513 | 323 | 410
Investment tax credits |  | (14) | (29) | (17)
Income tax expense (benefit) |  | $ 389 | $ 294 | $ 447

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