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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Total Amount of Unrecognized Tax Benefits at January | $ 192 | $ 147 | $ 321
Increases as a Result of Positions Taken in a Prior Period | 9 | 58 | 33
Decreases as a Result of Positions Taken in a Prior Period | (40) | (19) | (91)
Increases as a Result of Positions Taken during the Current Period | 1 | 6 | 0
Decreases as a Result of Positions Taken during the Current Period | 0 | 0 | 0
Decreases as a Result of Settlements with Taxing Authorities | (28) | 0 | (116)
Decreases due to Lapses of Applicable Statute of Limitations | (4) | 0 | 0
Total Amount of Unrecognized Tax Benefits at December | 130 | 192 | 147
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits | (37) | (76) | (69)
Regulatory Asset-Unrecognized Tax Benefits | (8) | (7) | (15)
Amount of unrecognized tax benefits that would affect the effective tax rate | 85 | 109 | 63
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 | 27 | 30 | 124
Increases as a Result of Positions Taken in a Prior Period | 2 | 8 | 21
Decreases as a Result of Positions Taken in a Prior Period | (2) | (12) | (51)
Increases as a Result of Positions Taken during the Current Period | 1 | 1 | 0
Decreases as a Result of Positions Taken during the Current Period | 0 | 0 | 0
Decreases as a Result of Settlements with Taxing Authorities | 0 | 0 | (64)
Decreases due to Lapses of Applicable Statute of Limitations |  | 0 | 0
Increases due to Lapses of Applicable Statute of Limitations | 1 |  |
Total Amount of Unrecognized Tax Benefits at December | 29 | 27 | 30
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits | (15) | (15) | (12)
Regulatory Asset-Unrecognized Tax Benefits | (8) | (7) | (15)
Amount of unrecognized tax benefits that would affect the effective tax rate | $ 6 | $ 5 | $ 3

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