Schedule I - Condensed Financial Information Of Parent (Schedule Of Condensed Income Statement) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating expenses	$ (14,179)	$ (15,489)	$ (15,325)
Interest income	31	23	9
Interest expense	(888)	(829)	(773)
Other income (expense)	72	91	117
Income Before Income Taxes	2,171	1,462	861
Income tax provision (benefit)	511	55	(27)
Income Available for Common Shareholders	1,646	1,393	874
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract]
Net change in investments (net of taxes $0, $0, and $12, at respective dates)	0	0	(17)
Total other comprehensive income (loss)	1	(2)	(18)
Comprehensive Income	$ 1,661	$ 1,405	$ 870
Weighted average common shares outstanding, basic	512	499	484
Weighted average common shares outstanding, diluted	513	501	487
Net earnings per common share, basic	$ 3.21	$ 2.79	$ 1.81
Net earnings per common share, diluted	$ 3.21	$ 2.78	$ 1.79
PG&E Corporation [Member]
Administrative service revenue	$ 63	$ 70	$ 51
Operating expenses	(5)	(73)	(53)
Interest income	1	1	1
Interest expense	(11)	(10)	(10)
Other income (expense)	4	2	30
Equity in earnings of subsidiaries	1,667	1,388	852
Income Before Income Taxes	1,719	1,378	871
Income tax provision (benefit)	73	(15)	(3)
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract]
Pension and other postretirement benefit plans (net of taxes of $0, $1, $0, at respective dates)	1	(2)	(1)
Net change in investments (net of taxes $0, $0, and $12, at respective dates)	0	0	(17)
Total other comprehensive income (loss)	1	(2)	(18)
Comprehensive Income	$ 1,647	$ 1,391	$ 856
Weighted average common shares outstanding, basic	512	499	484
Weighted average common shares outstanding, diluted	513	501	487
Net earnings per common share, basic	$ 3.21	$ 2.79	$ 1.81
Net earnings per common share, diluted	$ 3.21	$ 2.78	$ 1.79