Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income (Loss)	$ 395	$ 327	$ 618	$ 985
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	17	24	42	50
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	(1)	1	(1)	2
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	6	9	18	25
Other Comprehensive Income (Loss), net of tax	22	34	59	77
COMPREHENSIVE INCOME	417	361	677	1,062
PSE And G [Member]
Net Income (Loss)	246	255	753	696
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	0	0	(1)	1
COMPREHENSIVE INCOME	246	255	752	697
Power [Member]
Net Income (Loss)	136	139	(131)	320
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	15	22	44	47
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	5	7	15	21
Other Comprehensive Income (Loss), net of tax	20	29	59	68
COMPREHENSIVE INCOME	$ 156	$ 168	$ (72)	$ 388