Consolidated Statements Of Equity (USD $) In Millions, except Share data	Total USD ($)	Pacific Gas And Electric Company [Member] USD ($)	Common Stock Shares [Member]	Common Stock Shares [Member] Pacific Gas And Electric Company [Member] USD ($)	Preferred Stock [Member] Pacific Gas And Electric Company [Member] USD ($)	Common Stock Amount [Member] USD ($)	Additional Paid-In Capital [Member] Pacific Gas And Electric Company [Member] USD ($)	Reinvested Earnings [Member] USD ($)	Reinvested Earnings [Member] Pacific Gas And Electric Company [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] Pacific Gas And Electric Company [Member] USD ($)	Total Shareholders' Equity [Member] USD ($)	Total Shareholders' Equity [Member] Pacific Gas And Electric Company [Member] USD ($)	Noncontrolling Interest - Preferred Stock Of Subsidiary [Member] USD ($)
Balance at Dec. 31, 2011	$ 12,353			$ 1,322	$ 258	$ 7,602	$ 3,796	$ 4,712	$ 7,210	$ (213)	$ (202)	$ 12,101	$ 12,384	$ 252
Balance, in shares at Dec. 31, 2011			412,257,082
Net income	830	811						830	811			830	811
Other comprehensive income (loss)	112	109								112	109	112	109
Equity contribution		885					885						885
Common stock issued, net	773					773						773
Common stock issued, net, shares			18,461,211
Stock-based compensation amortization	52					52						52
Common stock dividends declared	(781)							(781)	(716)			(781)	(716)
Tax benefit (expense) from employee stock plans	1					1	1					1	1
Preferred stock dividend									(14)				(14)
Preferred stock dividend requirement of subsidiary	(14)							(14)				(14)
Balance at Dec. 31, 2012	13,326			1,322	258	8,428	4,682	4,747	7,291	(101)	(93)	13,074	13,460	252
Balance, in shares at Dec. 31, 2012			430,718,293
Net income	828	866						828	866			828	866
Other comprehensive income (loss)	151	106								151	106	151	106
Equity contribution		1,140					1,140						1,140
Common stock issued, net	1,067					1,067						1,067
Common stock issued, net, shares			25,952,131
Stock-based compensation amortization	56					56						56
Common stock dividends declared	(819)							(819)	(716)			(819)	(716)
Tax benefit (expense) from employee stock plans	(1)					(1)	(1)					(1)	(1)
Preferred stock dividend									(14)				(14)
Preferred stock dividend requirement of subsidiary	(14)							(14)				(14)
Balance at Dec. 31, 2013	14,594			1,322	258	9,550	5,821	4,742	7,427	50	13	14,342	14,841	252
Balance, in shares at Dec. 31, 2013	456,670,424	264,374,809	456,670,424
Net income	1,450	1,433						1,450	1,433			1,450	1,433
Other comprehensive income (loss)	(39)	(8)								(39)	(8)	(39)	(8)
Equity contribution		705					705						705
Common stock issued, net	823					823						823
Common stock issued, net, shares			19,242,980
Stock-based compensation amortization	65					65						65
Common stock dividends declared	(862)							(862)	(716)			(862)	(716)
Tax benefit (expense) from employee stock plans	(17)					(17)	(12)					(17)	(12)
Preferred stock dividend									(14)				(14)
Preferred stock dividend requirement of subsidiary	(14)							(14)				(14)
Balance at Dec. 31, 2014	$ 16,000			$ 1,322	$ 258	$ 10,421	$ 6,514	$ 5,316	$ 8,130	$ 11	$ 5	$ 15,748	$ 16,229	$ 252
Balance, in shares at Dec. 31, 2014	475,913,404	264,374,809	475,913,404