Earnings Per Share (Reconciliation Of PG&E Corporation's Income Available For Common Shareholders And Weighted Average Shares Of Common Stock Outstanding For Calculating Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Income available for common shareholders	$ 874	$ 1,436	$ 814
Weighted average common shares outstanding, basic	484	468	444
Add Incremental Shares From Assumed conversions:
Employee share-based compensation	3	2	1
Weighted average common shares outstanding, diluted	487	470	445
Total earnings per common share, diluted	$ 1.79	$ 3.06	$ 1.83