Condensed Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income	$ 390	$ 347	$ 1,043	$ 1,051
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	16	(10)	27	12
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	(1)	(10)	(5)	(20)
Pension/OPEB adjustment, net of tax (expense) benefit	9	8	28	23
Other Comprehensive Income (Loss), net of tax	24	(12)	50	15
COMPREHENSIVE INCOME	414	335	1,093	1,066
Power [Member]
Net Income	221	181	562	538
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	17	(11)	30	11
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	(1)	(11)	(6)	(21)
Pension/OPEB adjustment, net of tax (expense) benefit	8	7	25	21
Other Comprehensive Income (Loss), net of tax	24	(15)	49	11
COMPREHENSIVE INCOME	245	166	611	549
PSE And G [Member]
Net Income	168	155	468	453
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	0	1	(1)	0
Other Comprehensive Income (Loss), net of tax				0
COMPREHENSIVE INCOME	$ 168	$ 156	$ 467	$ 453