Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Income (Loss)	$ 269	$ 109	$ 827	$ 223
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(5)	10	(19)	25
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	(1)	0	(1)	0
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	7	6	15	12
Other Comprehensive Income (Loss), net of tax	1	16	(5)	37
COMPREHENSIVE INCOME	270	125	822	260
PSE And G [Member]
Net Income (Loss)	231	208	550	507
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	1	0	0	(1)
COMPREHENSIVE INCOME	232	208	550	506
Power [Member]
Net Income (Loss)	41	(97)	275	(267)
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(4)	10	(15)	29
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	6	5	12	10
Other Comprehensive Income (Loss), net of tax	2	15	(3)	39
COMPREHENSIVE INCOME	$ 43	$ (82)	$ 272	$ (228)