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Income Taxes (Reconciliation Of Reported Income Tax Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |  |  |
Net Income | $ 1,905 | [1] | $ 1,693 | [1] | $ 1,438
Federal | 385 |  | 84 |  | (97)
State | 48 |  | 18 |  | 83
Total Current | 433 |  | 102 |  | (14)
Federal | (164) |  | 3 |  | 373
State | 141 |  | 132 |  | 71
Total Deferred | (23) |  | 135 |  | 444
Investment tax credit | (14) |  | 20 |  | (13)
Total Income Tax | 396 |  | 257 |  | 417
Pre-Tax Income | 2,301 |  | 1,950 |  | 1,855
Tax Computed at Statutory Rate | 483 |  | 410 |  | 390
State Income Taxes (net of federal income tax) | 147 |  | 117 |  | 123
Uncertain Tax Positions | 3 |  | 0 |  | (24)
Nuclear Decommissioning Trust | 32 |  | 34 |  | (13)
Plant-Related Items | (9) |  | (2) |  | (10)
Tax Credits | (18) |  | (18) |  | (16)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount | (27) |  | 0 |  | 0
Effective Income Tax Rate Reconciliation, Leasing Activities, Amount | (35) |  | 0 |  | 0
Tax Adjustment Credit | (205) |  | (272) |  | (30)
Effective Income Tax Rate Reconciliation, Bad Debt Flow Through, Amount | 28 |  | 0 |  | 0
Other | (3) |  | (12) |  | (6)
Sub-Total | (87) |  | (153) |  | 27
Income Tax Provision | $ 396 |  | $ 257 |  | $ 417
Effective income tax rate | 17.20% |  | 13.20% |  | 22.50%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 0 |  | $ 0 |  | $ 3
Public Service Electric and Gas Company |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net Income | 1,327 |  | 1,250 |  | 1,067
Federal | 179 |  | 121 |  | (62)
State | 8 |  | 0 |  | 1
Total Current | 187 |  | 121 |  | (61)
Federal | (71) |  | (156) |  | 287
State | 128 |  | 117 |  | 122
Total Deferred | 57 |  | (39) |  | 409
Investment tax credit | (4) |  | 11 |  | (4)
Total Income Tax | 240 |  | 93 |  | 344
Pre-Tax Income | 1,567 |  | 1,343 |  | 1,411
Tax Computed at Statutory Rate | 329 |  | 282 |  | 296
State Income Taxes (net of federal income tax) | 106 |  | 92 |  | 98
Uncertain Tax Positions | 4 |  | 1 |  | (1)
Plant-Related Items | (9) |  | (2) |  | (10)
Tax Credits | (9) |  | (8) |  | (8)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount | (2) |  | 0 |  | 0
Tax Adjustment Credit | (205) |  | (272) |  | (30)
Effective Income Tax Rate Reconciliation, Bad Debt Flow Through, Amount | 28 |  | 0 |  | 0
Other | (2) |  | 0 |  | (1)
Sub-Total | (89) |  | (189) |  | 48
Income Tax Provision | $ 240 |  | $ 93 |  | $ 344
Effective income tax rate | 15.30% |  | 6.90% |  | 24.40%
PSEG Power LLC |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net Income | $ 594 |  | $ 468 |  | $ 365
Federal | 135 |  | (48) |  | (164)
State | (7) |  | 3 |  | 24
Total Current | 128 |  | (45) |  | (140)
Federal | 39 |  | 208 |  | 214
State | 31 |  | 31 |  | 1
Total Deferred | 70 |  | 239 |  | 215
Investment tax credit | (10) |  | 9 |  | (9)
Total Income Tax | 188 |  | 203 |  | 66
Pre-Tax Income | 782 |  | 671 |  | 431
Tax Computed at Statutory Rate | 164 |  | 141 |  | 91
State Income Taxes (net of federal income tax) | 18 |  | 25 |  | 21
Uncertain Tax Positions | 5 |  | 11 |  | (24)
Nuclear Decommissioning Trust | 32 |  | 34 |  | (13)
Tax Credits | (9) |  | (10) |  | (7)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount | (21) |  | 0 |  | 0
Other | (1) |  | 2 |  | (1)
Sub-Total | 24 |  | 62 |  | (25)
Income Tax Provision | $ 188 |  | $ 203 |  | $ 66
Effective income tax rate | 24.00% |  | 30.30% |  | 15.30%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 0 |  | $ 0 |  | $ (1)
[1] | Includes an after-tax gain of $86 million in the year ended December 31, 2020 related to the sale of PSEG Power’s interest in the Yards Creek generation facility and an after-tax loss of $286 million in the year ended December 31, 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants. See Note 4. Early Plant Retirements/Asset Dispositions for additional information.

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