Income Taxes (Reconciliation Of Reported Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended										12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Net Income	$ (98)	[1]	$ 327	$ 187	$ 471	$ 309	[1]	$ 439	$ 345	$ 586
Net Income											$ 887	$ 1,679	$ 1,518
Federal											(74)	243	335
State											61	85	58
Total Current											(13)	328	393
Federal											311	540	262
State											28	104	260
Total Deferred											339	644	522
Investment tax credit											85	29	23
Total Income Tax											411	1,001	938
Pre-Tax Income											1,298	2,680	2,456
Tax Computed at Statutory Rate @ 35%											454	938	860
State Income Taxes (net of federal income tax)											56	129	145
Uncertain Tax Positions											(31)	7	(9)
Manufacturing Deduction											(17)	(10)	(16)
Nuclear Decommissioning Trust											3	7	14
Plant-Related Items											(20)	(20)	(13)
Tax Credits											(25)	(13)	(14)
Audit Settlement											0	0	(12)
Nuclear Decommissiong Tax Carryback											0	(33)	0
Other											(9)	(4)	(17)
Sub-Total											(43)	63	78
Income Tax Provision											$ 411	$ 1,001	$ 938
Effective income tax rate											31.70%	37.40%	38.20%
PSE&G [Member]
Income Taxes [Line Items]
Net Income	193		255	179	262	156		222	167	242
Net Income											$ 889	$ 787	$ 725
Federal											(153)	32	124
State											10	52	16
Total Current											(143)	84	140
Federal											551	325	214
State											102	52	84
Total Deferred											653	377	298
Investment tax credit											5	9	11
Total Income Tax											515	470	449
Pre-Tax Income											1,404	1,257	1,174
Tax Computed at Statutory Rate @ 35%											491	440	411
State Income Taxes (net of federal income tax)											72	67	65
Uncertain Tax Positions											(18)	(14)	0
Plant-Related Items											(20)	(20)	(13)
Tax Credits											(7)	(6)	(7)
Audit Settlement											0	0	1
Other											(3)	3	(8)
Sub-Total											24	30	38
Income Tax Provision											$ 515	$ 470	$ 449
Effective income tax rate											36.70%	37.40%	38.20%
Power [Member]
Income Taxes [Line Items]
Net Income	$ (302)	[1]	$ 139	$ (11)	$ 192	$ 149	[1]	$ 206	$ 166	$ 335
Net Income											$ 18	$ 856	$ 760
Federal											107	220	231
State											40	30	39
Total Current											147	250	270
Federal											(222)	189	163
State											(68)	52	48
Total Deferred											(290)	241	211
Investment tax credit											82	20	10
Total Income Tax											(61)	511	491
Pre-Tax Income											(43)	1,367	1,251
Tax Computed at Statutory Rate @ 35%											(15)	478	438
State Income Taxes (net of federal income tax)											(18)	59	58
Uncertain Tax Positions											9	22	(8)
Manufacturing Deduction											(17)	(10)	(16)
Nuclear Decommissioning Trust											3	7	15
Tax Credits											(18)	(7)	(6)
Audit Settlement											0	0	(4)
Nuclear Decommissiong Tax Carryback											0	(33)	0
Other											(5)	(5)	14
Sub-Total											(46)	33	53
Income Tax Provision											$ (61)	$ 511	$ 491
Effective income tax rate											141.90%	37.40%	39.20%

[1] The decreases in Operating Income at PSEG consolidated and Power in the fourth quarter 2016 as compared to the same quarter in 2015 were primarily due to costs related to closing the coal/gas Hudson and Mercer units and higher MTM losses in 2016.