Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income	$ 700	$ 558
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	21	(14)
Unrealized Gains (Losses) on Cash Flow Hedges, net of tax (expense) benefit	(4)	0
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	0	8
Other Comprehensive Income (Loss), net of tax	17	(6)
COMPREHENSIVE INCOME	717	552
PSE And G [Member]
Net Income	403	319
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	1	(1)
Other Comprehensive Income (Loss), net of tax	1	(1)
COMPREHENSIVE INCOME	404	318
Power [Member]
Net Income	296	234
Other Comprehensive Income (Loss), net of tax
Unrealized Gains (Losses) on Available-for-Sale Securities, net of tax (expense) benefit	16	(11)
Pension/Other Postretirement Benefit (OPEB) adjustment, net of tax (expense) benefit	0	6
Other Comprehensive Income (Loss), net of tax	16	(5)
COMPREHENSIVE INCOME	$ 312	$ 229