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, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Income available for common shareholders	$ 1,393	$ 874	$ 1,436
Weighted average common shares outstanding, basic	499	484	468
Add Incremental Shares From Assumed conversions:
Employee share-based compensation	2	3	2
Weighted average common shares outstanding, diluted	501	487	470
Total earnings per common share, diluted	$ 2.78	$ 1.79	$ 3.06