Income Taxes (Schedule Of Change In Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pacific Gas And Electric Company [Member]
Balance at beginning of year	$ 462	$ 707	$ 660
Additions for tax position taken during a prior year	0	40	7
Reductions for tax position taken during a prior year	(77)	(349)	(9)
Additions for tax position taken during the current year	56	64	61
Settlements	(59)	0	(12)
Balance at end of year	382	462	707
PG&E Corporation [Member]
Balance at beginning of year	468	713	666
Additions for tax position taken during a prior year	0	40	7
Reductions for tax position taken during a prior year	(77)	(349)	(9)
Additions for tax position taken during the current year	56	64	61
Settlements	(59)	0	(12)
Balance at end of year	$ 388	$ 468	$ 713