Condensed Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Income	$ 333	$ 211	$ 653	$ 704
Other Comprehensive Income (Loss), net of tax
Available-for-Sale Securities, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	(16)	(15)	11	22
Change in Fair Value of Derivative Instruments, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	0	(5)	0	15
Reclassification Adjustments for Net Amounts included in Net Income, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	0	(5)	(4)	(25)
Pension/OPEB adjustment, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	9	8	19	15
Other Comprehensive Income (Loss), net of tax	(7)	(17)	26	27
COMPREHENSIVE INCOME	326	194	679	731
Power [Member]
Net Income	204	104	341	357
Other Comprehensive Income (Loss), net of tax
Available-for-Sale Securities, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	(14)	(15)	13	22
Change in Fair Value of Derivative Instruments, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	0	(5)	0	15
Reclassification Adjustments for Net Amounts included in Net Income, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	(1)	(5)	(5)	(25)
Pension/OPEB adjustment, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	8	7	17	14
Other Comprehensive Income (Loss), net of tax	(7)	(18)	25	26
COMPREHENSIVE INCOME	197	86	366	383
PSE And G [Member]
Net Income	121	101	300	298
Other Comprehensive Income (Loss), net of tax
Available-for-Sale Securities, net of tax (expense) benefit for the three and six months ended 2013 and 2012, respectively	(1)	0	(1)	(1)
COMPREHENSIVE INCOME	$ 120	$ 101	$ 299	$ 297