Equity (Changes In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Balance at December 31, 2015			$ 16,576
Balance at December 31, 2015			16,828
Comprehensive Income Net Of Tax	$ 210	$ 406	320	$ 423
Common stock issued			299
Share-based compensation			35
Common stock dividends declared			(477)
Preferred stock dividend requirement of subsidiary	(4)	(4)	(7)	(7)
Balance at June 30, 2016	16,998		16,998
Balance at June 30, 2016	16,746		16,746
Pacific Gas And Electric Company [Member]
Balance at December 31, 2015			17,060
Comprehensive Income Net Of Tax	210	406	318	410
Common stock issued			0
Share-based compensation			0
Common stock dividends declared			(423)
Preferred stock dividend requirement	(4)	$ (4)	(7)	(7)
Equity contributions			280	$ 185
Balance at June 30, 2016	$ 17,228		$ 17,228