Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax (Changes in AOCI) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (95)	$ (388)
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	6
Other Comprehensive Income (Loss), Net of Tax	293	(51)	(181)
PSEG [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(95)	(388)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	299
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	6
Other Comprehensive Income (Loss), Net of Tax	293
Power [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(63)	(328)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	276
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	11
Other Comprehensive Income (Loss), Net of Tax	265	(52)	(181)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | PSEG [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2)	7
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2)	17
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	7	41
Other Comprehensive Income (Loss), Net of Tax	9
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Power [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1)	9
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2)
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	8
Other Comprehensive Income (Loss), Net of Tax	(10)
Accumulated Defined Benefit Plans Adjustment [Member] | PSEG [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(238)	(485)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	210
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	(37)
Other Comprehensive Income (Loss), Net of Tax	(247)
Accumulated Defined Benefit Plans Adjustment [Member] | Power [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(204)	(422)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	185
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	(33)
Other Comprehensive Income (Loss), Net of Tax	218
Accumulated Net Unrealized Investment Gain (Loss) [Member] | PSEG [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	145	90
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	91
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	36
Other Comprehensive Income (Loss), Net of Tax	(55)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Power [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	142	85
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	93
Amount Reclassified from Accumulated Other Comprehensive Income, After-Tax	36
Other Comprehensive Income (Loss), Net of Tax	$ 57