Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	$ (13)	$ (3)
Unrealized Gains (Losses) on Cash Flow Hedges, tax	7	(2)
Pension/OPEB adjustment, tax	(6)	(2)
PSE And G [Member]
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	0	0
Power [Member]
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	(13)	(2)
Unrealized Gains (Losses) on Cash Flow Hedges, tax	7	(1)
Pension/OPEB adjustment, tax	$ (5)	$ (2)