Income Taxes (Reconciliation Of Reported Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended														6 Months Ended		12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017		Mar. 31, 2017		Jun. 30, 2018	[1]	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Net Income	$ 199	[1]	$ 412			$ 558	[1]	$ 956	[1]	$ 395	$ 109	[1]	$ 114	[1]	$ 269
Net Income																	$ 1,438	$ 1,574	$ 887
Federal																	(97)	86	(74)
State																	83	(31)	61
Total Current																	(14)	55	(13)
Federal																	373	(482)	311
State																	71	92	28
Total Deferred																	444	(390)	339
Investment tax credit																	(13)	29	85
Total Income Tax																	417	(306)	411
Pre-Tax Income																	1,855	1,268	1,298
Tax Computed at Statutory Rate																	390	444	454
State Income Taxes (net of federal income tax)																	123	36	56
Uncertain Tax Positions																	(24)	(3)	(31)
Manufacturing Deduction																	0	(13)	(17)
Nuclear Decommissioning Trust																	(13)	19	3
Plant-Related Items																	(10)	(23)	(20)
Tax Credits																	(16)	(22)	(25)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount																	0	6	0
Tax Adjustment Credit																	(30)	0	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount																	3	(755)	0
Other																	(6)	5	(9)
Sub-Total																	27	(750)	(43)
Income Tax Provision																	$ 417	$ (306)	$ 411
Effective income tax rate																	22.50%	(24.10%)	31.70%
PSE&G [Member]
Income Taxes [Line Items]
Net Income	239		278	$ 231		319		220		246	208		299
Net Income																	$ 1,067	$ 973	$ 889
Federal																	(62)	(52)	(153)
State																	1	(1)	10
Total Current																	(61)	(53)	(143)
Federal																	287	492	551
State																	122	129	102
Total Deferred																	409	621	653
Investment tax credit																	(4)	(5)	5
Total Income Tax																	344	563	515
Pre-Tax Income																	1,411	1,536	1,404
Tax Computed at Statutory Rate																	296	538	491
State Income Taxes (net of federal income tax)																	98	83	72
Uncertain Tax Positions																	(1)	(9)	(18)
Plant-Related Items																	(10)	(23)	(20)
Tax Credits																	(8)	(9)	(7)
Tax Adjustment Credit																	(30)	0	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount																	0	(10)	0
Other																	(1)	(7)	(3)
Sub-Total																	48	25	24
Income Tax Provision																	$ 344	$ 563	$ 515
Effective income tax rate																	24.40%	36.70%	36.70%
Power [Member]
Income Taxes [Line Items]
Net Income	$ (35)	[1]	$ 125	$ 41	[1]	$ 234	[1]	$ 610	[1]	$ 136	$ (97)	[1]	$ (170)	[1]
Net Income																	$ 365	$ 479	$ 18
Federal																	(164)	95	107
State																	24	(17)	40
Total Current																	(140)	78	147
Federal																	214	(804)	(222)
State																	1	(37)	(68)
Total Deferred																	215	(841)	(290)
Investment tax credit																	(9)	34	82
Total Income Tax																	66	(729)	(61)
Pre-Tax Income																	431	(250)	(43)
Tax Computed at Statutory Rate																	91	(88)	(15)
State Income Taxes (net of federal income tax)																	21	(36)	(18)
Uncertain Tax Positions																	(24)	7	9
Manufacturing Deduction																	0	(13)	(17)
Nuclear Decommissioning Trust																	(13)	19	3
Tax Credits																	(7)	(12)	(18)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount																	0	1	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount																	(1)	(610)	0
Other																	(1)	3	(5)
Sub-Total																	(25)	(641)	(46)
Income Tax Provision																	$ 66	$ (729)	$ (61)
Effective income tax rate																	15.30%	291.60%	141.90%

[1] The increases in Operating Income at PSEG consolidated and Power in the first and second quarters of 2018 as compared to the same quarters in 2017 were primarily due to higher costs in 2017 related to closing the coal/gas Hudson and Mercer units, which were fully depreciated as of June 1, 2017. The increases in Operating Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 were primarily due to lower MTM losses and a gain on the sale of the Hudson and Mercer units.The decreases in Net Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 also reflected the impact of the one-time benefit recorded in December 2017 as a result of the remeasurement of deferred tax balances and the inclusion in 2018 of net unrealized losses on equity investments in the NDT Fund in accordance with new accounting guidance.