Condensed Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income	$ 444	$ 390	$ 1,042	$ 1,043
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(30)	16	(17)	27
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	1	(1)	4	(5)
Pension/OPEB adjustment, net of tax (expense) benefit	3	9	9	28
Other Comprehensive Income (Loss), net of tax	(26)	24	(4)	50
COMPREHENSIVE INCOME	418	414	1,038	1,093
Power [Member]
Net Income	222	226	440	577
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(30)	17	(19)	30
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	1	(1)	4	(6)
Pension/OPEB adjustment, net of tax (expense) benefit	2	8	7	25
Other Comprehensive Income (Loss), net of tax	(27)	24	(8)	49
COMPREHENSIVE INCOME	195	250	432	626
PSE And G [Member]
Net Income	200	168	565	468
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	1	0	1	(1)
COMPREHENSIVE INCOME	$ 201	$ 168	$ 566	$ 467