Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	$ 33	$ (16)	$ 21	$ (27)
Unrealized Gains (Losses) on Cash Flow Hedges, tax	(1)	1	(3)	4
Pension/OPEB adjustment, tax	(2)	(6)	(5)	(20)
Power [Member]
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	34	(18)	23	(29)
Unrealized Gains (Losses) on Cash Flow Hedges, tax	0	1	(2)	4
Pension/OPEB adjustment, tax	(1)	(6)	(4)	(17)
PSE And G [Member]
Unrealized Gains (Losses) on Available-for-Sale Securities, tax	$ 0	$ 0	$ 0	$ 1