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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
--- | --- | --- | ---
Nov. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Current: |  |  |  |  |
Federal |  |  | $ 7 | $ (162) | $ (314)
State |  |  | 46 | 45 | (81)
Total current expense (benefit) |  |  | 53 | (117) | (395)
Deferred: |  |  |  |  |
Taxes before operating loss carryforwards and investment tax credits |  |  | 62 | 151 | 12
Tax utilization expense of operating loss carryforwards |  |  | 36 | 43 | 44
Investment tax credits |  |  | (129) | 250 | 311
State |  |  | 32 | (19) | 72
Total deferred expense (benefit) |  |  | 1 | 425 | 439
Investment tax credit-gross deferral |  |  | 18 | 121 | 42
Investment tax credit-amortization |  |  | (4) | (4) | (3)
Total income tax expense | $ 336 | $ 173 | 68 | 425 | 83
Virginia Electric and Power Company |  |  |  |  |
Current: |  |  |  |  |
Federal |  |  | 17 | 67 | 364
State |  |  | (17) | (13) | 71
Total current expense (benefit) |  |  | 0 | 54 | 435
Deferred: |  |  |  |  |
Taxes before operating loss carryforwards and investment tax credits |  |  | 212 | 145 | (226)
Tax utilization expense of operating loss carryforwards |  |  | 0 | 0 | 0
Investment tax credits |  |  | (148) | (39) | (27)
State |  |  | 112 | 118 | 7
Total deferred expense (benefit) |  |  | 176 | 224 | (246)
Investment tax credit-gross deferral |  |  | 18 | 121 | 42
Investment tax credit-amortization |  |  | (3) | (2) | (2)
Total income tax expense |  |  | $ 191 | $ 397 | $ 229

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- Definition Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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