Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Income (Loss)	$ 114	$ 471
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	15	16
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	0	2
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	6	8
Other Comprehensive Income (Loss), net of tax	21	26
COMPREHENSIVE INCOME	135	497
PSE And G [Member]
Net Income (Loss)	299	262
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(1)	0
COMPREHENSIVE INCOME	298	262
Power [Member]
Net Income (Loss)	(170)	192
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	19	16
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	5	7
Other Comprehensive Income (Loss), net of tax	24	23
COMPREHENSIVE INCOME	$ (146)	$ 215