CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common Stock	Reinvested Earnings	Accumulated Other Comprehensive Income (Loss)	Total Shareholders’ Equity	Non- controlling Interest - Preferred Stock of Subsidiary	Pacific Gas & Electric Co (Utility)	Pacific Gas & Electric Co (Utility) Preferred Stock	Pacific Gas & Electric Co (Utility) Common Stock	Pacific Gas & Electric Co (Utility) Additional Paid-in Capital	Pacific Gas & Electric Co (Utility) Reinvested Earnings	Pacific Gas & Electric Co (Utility) Accumulated Other Comprehensive Income (Loss)	Pacific Gas & Electric Co (Utility) Total Shareholders’ Equity
Beginning balance (in shares) at Dec. 31, 2019		529,236,741
Beginning balance at Dec. 31, 2019	$ 5,388	$ 13,038	$ (7,892)	$ (10)	$ 5,136	$ 252		$ 258	$ 1,322	$ 8,550	$ (4,796)	$ 1	$ 5,335
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	374		374		374						451		451
Other comprehensive income (loss)	0			0	0
Common stock issued, net (in shares)		549,155
Stock-based compensation amortization	(3)	$ (3)			(3)
Ending balance (in shares) at Mar. 31, 2020		529,785,896
Ending balance at Mar. 31, 2020	5,759	$ 13,035	(7,518)	(10)	5,507	252		258	1,322	8,550	(4,345)	1	5,786
Beginning balance (in shares) at Dec. 31, 2019		529,236,741
Beginning balance at Dec. 31, 2019	5,388	$ 13,038	(7,892)	(10)	5,136	252		258	1,322	8,550	(4,796)	1	5,335
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(1,594)						$ (22)
Ending balance (in shares) at Jun. 30, 2020		529,793,355
Ending balance at Jun. 30, 2020	3,801	$ 13,045	(9,486)	(10)	3,549	252		258	1,322	8,550	(4,818)	1	5,313
Beginning balance (in shares) at Mar. 31, 2020		529,785,896
Beginning balance at Mar. 31, 2020	5,759	$ 13,035	(7,518)	(10)	5,507	252		258	1,322	8,550	(4,345)	1	5,786
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(1,968)		(1,968)		(1,968)		$ (473)				(473)		(473)
Other comprehensive income (loss)	0			0	0
Common stock issued, net (in shares)		7,459
Stock-based compensation amortization	10	$ 10			10
Ending balance (in shares) at Jun. 30, 2020		529,793,355
Ending balance at Jun. 30, 2020	$ 3,801	$ 13,045	(9,486)	(10)	3,549	252		258	1,322	8,550	(4,818)	1	5,313
Beginning balance (in shares) at Dec. 31, 2020	1,984,678,673	1,984,678,673					264,374,809
Beginning balance at Dec. 31, 2020	$ 21,253	$ 30,224	(9,196)	(27)	21,001	252		258	1,322	28,286	(4,385)	(5)	25,476
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	123		123		123						177		177
Other comprehensive income (loss)	1			1	1
Common stock issued, net (in shares)		427,030
Stock-based compensation amortization	2	$ 2			2
Ending balance (in shares) at Mar. 31, 2021		1,985,105,703
Ending balance at Mar. 31, 2021	$ 21,379	$ 30,226	(9,073)	(26)	21,127	252		258	1,322	28,286	(4,208)	(5)	25,653
Beginning balance (in shares) at Dec. 31, 2020	1,984,678,673	1,984,678,673					264,374,809
Beginning balance at Dec. 31, 2020	$ 21,253	$ 30,224	(9,196)	(27)	21,001	252		258	1,322	28,286	(4,385)	(5)	25,476
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	$ 524						$ 617
Ending balance (in shares) at Jun. 30, 2021	1,985,273,048	1,985,273,048					264,374,809
Ending balance at Jun. 30, 2021	$ 21,799	$ 30,245	(8,672)	(26)	21,547	252		258	1,322	28,286	(3,768)	(5)	26,093
Beginning balance (in shares) at Mar. 31, 2021		1,985,105,703
Beginning balance at Mar. 31, 2021	21,379	$ 30,226	(9,073)	(26)	21,127	252		258	1,322	28,286	(4,208)	(5)	25,653
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	401		401		401		$ 440				440		440
Other comprehensive income (loss)	0			0	0
Common stock issued, net (in shares)		167,345
Stock-based compensation amortization	$ 19	$ 19			19
Ending balance (in shares) at Jun. 30, 2021	1,985,273,048	1,985,273,048					264,374,809
Ending balance at Jun. 30, 2021	$ 21,799	$ 30,245	$ (8,672)	$ (26)	$ 21,547	$ 252		$ 258	$ 1,322	$ 28,286	$ (3,768)	$ (5)	$ 26,093