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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Total Amount of Unrecognized Tax Benefits at January | $ 130 | $ 192 | $ 147
Increases as a Result of Positions Taken in a Prior Period | 16 | 9 | 58
Decreases as a Result of Positions Taken in a Prior Period | (25) | (40) | (19)
Increases as a Result of Positions Taken during the Current Period | 0 | 1 | 6
Decreases as a Result of Positions Taken during the Current Period | 0 | 0 | 0
Decreases as a Result of Settlements with Taxing Authorities | (10) | (28) | 0
Decreases due to Lapses of Applicable Statute of Limitations | (1) | (4) | 0
Total Amount of Unrecognized Tax Benefits at December | 110 | 130 | 192
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits | (29) | (37) | (76)
Regulatory Asset-Unrecognized Tax Benefits | (2) | (8) | (7)
Amount of unrecognized tax benefits that would affect the effective tax rate | 79 | 85 | 109
Public Service Electric and Gas Company |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Total Amount of Unrecognized Tax Benefits at January | 29 | 27 | 30
Increases as a Result of Positions Taken in a Prior Period | 2 | 2 | 8
Decreases as a Result of Positions Taken in a Prior Period | (12) | (2) | (12)
Increases as a Result of Positions Taken during the Current Period | 0 | 1 | 1
Decreases as a Result of Positions Taken during the Current Period | 0 | 0 | 0
Decreases as a Result of Settlements with Taxing Authorities | (7) | 0 | 0
Unrecognized Tax Benefit, Increase Resulting from |  | 1 |
Decreases due to Lapses of Applicable Statute of Limitations |  |  | 0
Increases due to Lapses of Applicable Statute of Limitations | (1) |  |
Total Amount of Unrecognized Tax Benefits at December | 11 | 29 | 27
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits | (7) | (15) | (15)
Regulatory Asset-Unrecognized Tax Benefits | (2) | (8) | (7)
Amount of unrecognized tax benefits that would affect the effective tax rate | $ 2 | $ 6 | $ 5

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