Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Income (Loss)	$ 109	$ 187	$ 223	$ 658
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	10	10	25	26
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	0	(1)	0	1
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	6	8	12	16
Other Comprehensive Income (Loss), net of tax	16	17	37	43
COMPREHENSIVE INCOME	125	204	260	701
PSE And G [Member]
Net Income (Loss)	208	179	507	441
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	0	1	(1)	1
COMPREHENSIVE INCOME	208	180	506	442
Power [Member]
Net Income (Loss)	(97)	(11)	(267)	181
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	10	9	29	25
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	5	7	10	14
Other Comprehensive Income (Loss), net of tax	15	16	39	39
COMPREHENSIVE INCOME	$ (82)	$ 5	$ (228)	$ 220