Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
PSEG [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	$ 402	$ 825	$ 756
Increases as a Result of Positions Taken in a Prior Period	83	92	58
Decreases as a Result of Positions Taken in a Prior Period	(30)	(173)	(22)
Increases as a Result of Positions Taken during the Current Period	23	47	37
Decreases as a Result of Positions Taken during the Current Period	0	0	(4)
Decreases as a Result of Settlements with Taxing Authorities	0	(389)	0
Decreases due to Lapses of Applicable Statute of Limitations	0	0	0
Total Amount of Unrecognized Tax Benefits at December	478	402	825
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(320)	(264)	(379)
Regulatory Asset-Unrecognized Tax Benefits	(30)	(30)	(20)
Amount of unrecognized tax benefits that would affect the effective tax rate	128	108	426
Power [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	134	121	101
Increases as a Result of Positions Taken in a Prior Period	33	27	24
Decreases as a Result of Positions Taken in a Prior Period	(19)	(7)	(9)
Increases as a Result of Positions Taken during the Current Period	8	3	8
Decreases as a Result of Positions Taken during the Current Period	0	0	(3)
Decreases as a Result of Settlements with Taxing Authorities	0	(10)	0
Decreases due to Lapses of Applicable Statute of Limitations	0	0	0
Total Amount of Unrecognized Tax Benefits at December	156	134	121
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(105)	(93)	(77)
Regulatory Asset-Unrecognized Tax Benefits	0	0	0
Amount of unrecognized tax benefits that would affect the effective tax rate	51	41	44
PSE&G [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	163	113	82
Increases as a Result of Positions Taken in a Prior Period	39	55	14
Decreases as a Result of Positions Taken in a Prior Period	(9)	(47)	0
Increases as a Result of Positions Taken during the Current Period	15	42	18
Decreases as a Result of Positions Taken during the Current Period	0	0	(1)
Decreases as a Result of Settlements with Taxing Authorities	0	0	0
Decreases due to Lapses of Applicable Statute of Limitations	0	0	0
Total Amount of Unrecognized Tax Benefits at December	208	163	113
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(177)	(133)	(65)
Regulatory Asset-Unrecognized Tax Benefits	(30)	(30)	(20)
Amount of unrecognized tax benefits that would affect the effective tax rate	1	0	28
Energy Holdings [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	101	555	539
Increases as a Result of Positions Taken in a Prior Period	11	9	17
Decreases as a Result of Positions Taken in a Prior Period	(2)	(119)	(12)
Increases as a Result of Positions Taken during the Current Period	0	0	11
Decreases as a Result of Positions Taken during the Current Period	0	0	0
Decreases as a Result of Settlements with Taxing Authorities	0	(344)	0
Decreases due to Lapses of Applicable Statute of Limitations	0	0	0
Total Amount of Unrecognized Tax Benefits at December	110	101	555
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(37)	(35)	(213)
Regulatory Asset-Unrecognized Tax Benefits	0	0	0
Amount of unrecognized tax benefits that would affect the effective tax rate	$ 73	$ 66	$ 342