Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income (Loss)	$ 558	$ 114
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(14)	15
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	8	6
Other Comprehensive Income (Loss), net of tax	(6)	21
COMPREHENSIVE INCOME	552	135
PSE And G [Member]
Net Income (Loss)	319	299
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(1)	(1)
COMPREHENSIVE INCOME	318	298
Power [Member]
Net Income (Loss)	234	(170)
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	(11)	19
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	6	5
Other Comprehensive Income (Loss), net of tax	(5)	24
COMPREHENSIVE INCOME	$ 229	$ (146)