Income Taxes (Schedule Of Income Tax Provision) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current, Federal	$ (10)	$ (105)	$ (89)
Current, State	48	(70)	11
Deferred, Federal	481	218	131
Deferred, State	6	16	(76)
Tax credits	(14)	(4)	(4)
Income Tax Provision	511	55	(27)
Pacific Gas And Electric Company [Member]
Current, Federal	61	(105)	(88)
Current, State	50	(66)	6
Deferred, Federal	326	229	136
Deferred, State	4	16	(69)
Tax credits	(14)	(4)	(4)
Income Tax Provision	427	70	(19)
PG&E Corporation [Member]
Income Tax Provision	$ 73	$ (15)	$ (3)