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Income Taxes (Reconciliation Of Reported Income Tax Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | $ 956 | [1] | $ 395 | $ 109 | $ 114 | $ (98) | [1] | $ 327 | $ 187 | $ 471 |  |  |
Net Income |  |  |  |  |  |  |  |  |  |  | $ 1,574 | $ 887 | $ 1,679
Federal |  |  |  |  |  |  |  |  |  |  | 86 | (74) | 243
State |  |  |  |  |  |  |  |  |  |  | (31) | 61 | 85
Total Current |  |  |  |  |  |  |  |  |  |  | 55 | (13) | 328
Federal |  |  |  |  |  |  |  |  |  |  | (482) | 311 | 540
State |  |  |  |  |  |  |  |  |  |  | 92 | 28 | 104
Total Deferred |  |  |  |  |  |  |  |  |  |  | (390) | 339 | 644
Investment tax credit |  |  |  |  |  |  |  |  |  |  | 29 | 85 | 29
Total Income Tax |  |  |  |  |  |  |  |  |  |  | (306) | 411 | 1,001
Pre-Tax Income |  |  |  |  |  |  |  |  |  |  | 1,268 | 1,298 | 2,680
Tax Computed at Statutory Rate @ 35% |  |  |  |  |  |  |  |  |  |  | 444 | 454 | 938
State Income Taxes (net of federal income tax) |  |  |  |  |  |  |  |  |  |  | 36 | 56 | 129
Uncertain Tax Positions |  |  |  |  |  |  |  |  |  |  | (3) | (31) | 7
Manufacturing Deduction |  |  |  |  |  |  |  |  |  |  | (13) | (17) | (10)
Nuclear Decommissioning Trust |  |  |  |  |  |  |  |  |  |  | 19 | 3 | 7
Plant-Related Items |  |  |  |  |  |  |  |  |  |  | (23) | (20) | (20)
Tax Credits |  |  |  |  |  |  |  |  |  |  | (22) | (25) | (13)
Audit Settlement |  |  |  |  |  |  |  |  |  |  | 6 | 0 | 0
Nuclear Decommissiong Tax Carryback |  |  |  |  |  |  |  |  |  |  | 0 | 0 | (33)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  |  |  |  |  |  |  |  |  |  | (755) | 0 | 0
Other |  |  |  |  |  |  |  |  |  |  | 5 | (9) | (4)
Sub-Total |  |  |  |  |  |  |  |  |  |  | (750) | (43) | 63
Income Tax Provision |  |  |  |  |  |  |  |  |  |  | $ (306) | $ 411 | $ 1,001
Effective income tax rate |  |  |  |  |  |  |  |  |  |  | (24.10%) | 31.70% | 37.40%
PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | 220 |  | 246 | 208 | 299 | 193 |  | 255 | 179 | 262 |  |  |
Net Income |  |  |  |  |  |  |  |  |  |  | $ 973 | $ 889 | $ 787
Federal |  |  |  |  |  |  |  |  |  |  | (52) | (153) | 32
State |  |  |  |  |  |  |  |  |  |  | (1) | 10 | 52
Total Current |  |  |  |  |  |  |  |  |  |  | (53) | (143) | 84
Federal |  |  |  |  |  |  |  |  |  |  | 492 | 551 | 325
State |  |  |  |  |  |  |  |  |  |  | 129 | 102 | 52
Total Deferred |  |  |  |  |  |  |  |  |  |  | 621 | 653 | 377
Investment tax credit |  |  |  |  |  |  |  |  |  |  | (5) | 5 | 9
Total Income Tax |  |  |  |  |  |  |  |  |  |  | 563 | 515 | 470
Pre-Tax Income |  |  |  |  |  |  |  |  |  |  | 1,536 | 1,404 | 1,257
Tax Computed at Statutory Rate @ 35% |  |  |  |  |  |  |  |  |  |  | 538 | 491 | 440
State Income Taxes (net of federal income tax) |  |  |  |  |  |  |  |  |  |  | 83 | 72 | 67
Uncertain Tax Positions |  |  |  |  |  |  |  |  |  |  | (9) | (18) | (14)
Plant-Related Items |  |  |  |  |  |  |  |  |  |  | (23) | (20) | (20)
Tax Credits |  |  |  |  |  |  |  |  |  |  | (9) | (7) | (6)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  |  |  |  |  |  |  |  |  |  | (10) | 0 | 0
Other |  |  |  |  |  |  |  |  |  |  | (7) | (3) | 3
Sub-Total |  |  |  |  |  |  |  |  |  |  | 25 | 24 | 30
Income Tax Provision |  |  |  |  |  |  |  |  |  |  | $ 563 | $ 515 | $ 470
Effective income tax rate |  |  |  |  |  |  |  |  |  |  | 36.70% | 36.70% | 37.40%
Power [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | $ 610 | [1] | $ 136 | $ (97) | $ (170) | $ (302) | [1] | $ 139 | $ (11) | $ 192 |  |  |
Net Income |  |  |  |  |  |  |  |  |  |  | $ 479 | $ 18 | $ 856
Federal |  |  |  |  |  |  |  |  |  |  | 95 | 107 | 220
State |  |  |  |  |  |  |  |  |  |  | (17) | 40 | 30
Total Current |  |  |  |  |  |  |  |  |  |  | 78 | 147 | 250
Federal |  |  |  |  |  |  |  |  |  |  | (804) | (222) | 189
State |  |  |  |  |  |  |  |  |  |  | (37) | (68) | 52
Total Deferred |  |  |  |  |  |  |  |  |  |  | (841) | (290) | 241
Investment tax credit |  |  |  |  |  |  |  |  |  |  | 34 | 82 | 20
Total Income Tax |  |  |  |  |  |  |  |  |  |  | (729) | (61) | 511
Pre-Tax Income |  |  |  |  |  |  |  |  |  |  | (250) | (43) | 1,367
Tax Computed at Statutory Rate @ 35% |  |  |  |  |  |  |  |  |  |  | (88) | (15) | 478
State Income Taxes (net of federal income tax) |  |  |  |  |  |  |  |  |  |  | (36) | (18) | 59
Uncertain Tax Positions |  |  |  |  |  |  |  |  |  |  | 7 | 9 | 22
Manufacturing Deduction |  |  |  |  |  |  |  |  |  |  | (13) | (17) | (10)
Nuclear Decommissioning Trust |  |  |  |  |  |  |  |  |  |  | 19 | 3 | 7
Tax Credits |  |  |  |  |  |  |  |  |  |  | (12) | (18) | (7)
Audit Settlement |  |  |  |  |  |  |  |  |  |  | 1 | 0 | 0
Nuclear Decommissiong Tax Carryback |  |  |  |  |  |  |  |  |  |  | 0 | 0 | (33)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  |  |  |  |  |  |  |  |  |  | (610) | 0 | 0
Other |  |  |  |  |  |  |  |  |  |  | 3 | (5) | (5)
Sub-Total |  |  |  |  |  |  |  |  |  |  | (641) | (46) | 33
Income Tax Provision |  |  |  |  |  |  |  |  |  |  | $ (729) | $ (61) | $ 511
Effective income tax rate |  |  |  |  |  |  |  |  |  |  | 291.60% | 141.90% | 37.40%
[1] | The increases in Operating Income at PSEG consolidated and Power in the fourth quarter 2017 as compared to the same quarter in 2016 were primarily due to higher costs in 2016 related to closing the coal/gas Hudson and Mercer units, which were fully depreciated as of June 1, 2017. The increases in Net Income at PSEG consolidated and Power in the fourth quarter 2017 as compared to the same quarter in 2016 also includes the impact of the remeasurement of deferred tax balances resulting from the enactment of new tax legislation in December 2017. See Note 20. Income Taxes for additional information.

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to domestic income tax settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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