Equity (Changes In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Balance at December 31, 2015			$ 16,576
Balance at December 31, 2015			16,828
Comprehensive Income Net Of Tax	$ 391	$ 310	711	$ 733
Common stock issued			742
Share-based compensation			59
Common stock dividends declared			(724)
Preferred stock dividend requirement of subsidiary	(3)	(3)	(10)	(10)
Balance at September 30, 2016	17,606		17,606
Balance at September 30, 2016	17,354		17,354
Pacific Gas And Electric Company [Member]
Balance at December 31, 2015			17,060
Comprehensive Income Net Of Tax	389	305	707	715
Common stock issued			0
Share-based compensation			0
Common stock dividends declared			(667)
Preferred stock dividend requirement	(3)	$ (3)	(10)	(10)
Equity contributions			740	$ 605
Balance at September 30, 2016	$ 17,830		$ 17,830