Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Income (Loss)	$ 412	$ 395	$ 1,239	$ 618
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(4)	17	(23)	42
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	0	(1)	(1)	(1)
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	7	6	22	18
Other Comprehensive Income (Loss), net of tax	3	22	(2)	59
COMPREHENSIVE INCOME	415	417	1,237	677
PSE And G [Member]
Net Income (Loss)	278	246	828	753
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(1)	0	(1)	(1)
COMPREHENSIVE INCOME	277	246	827	752
Power [Member]
Net Income (Loss)	125	136	400	(131)
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(4)	15	(19)	44
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	7	5	19	15
Other Comprehensive Income (Loss), net of tax	3	20	0	59
COMPREHENSIVE INCOME	$ 128	$ 156	$ 400	$ (72)