CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - SDG&E - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common stock	Common stock Cumulative Effect, Period of Adoption, Adjusted Balance	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Sempra Energy shareholders' equity	Sempra Energy shareholders' equity Cumulative Effect, Period of Adoption, Adjustment	Sempra Energy shareholders' equity Cumulative Effect, Period of Adoption, Adjusted Balance	Non- controlling interests	Non- controlling interests Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member]	San Diego Gas and Electric Company [Member] Cumulative Effect, Period of Adoption, Adjustment	San Diego Gas and Electric Company [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member] Common stock	San Diego Gas and Electric Company [Member] Common stock Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member] Retained earnings	San Diego Gas and Electric Company [Member] Retained earnings Cumulative Effect, Period of Adoption, Adjustment	San Diego Gas and Electric Company [Member] Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member] Accumulated other comprehensive income (loss)	San Diego Gas and Electric Company [Member] Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment	San Diego Gas and Electric Company [Member] Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member] Sempra Energy shareholders' equity	San Diego Gas and Electric Company [Member] Sempra Energy shareholders' equity Cumulative Effect, Period of Adoption, Adjusted Balance	San Diego Gas and Electric Company [Member] Non- controlling interests	San Diego Gas and Electric Company [Member] Non- controlling interests Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning Balance at Dec. 31, 2018	$ 19,248		$ 19,263	$ 5,540	$ 5,540	$ 10,104		$ 10,161	$ (764)		$ (806)	$ 17,138		$ 17,153	$ 2,110	$ 2,110	$ 6,115		$ 6,115	$ 1,338	$ 1,338	$ 4,687		$ 4,689	$ (10)		$ (12)	$ 6,015	$ 6,015	$ 100	$ 100
Beginning Balance (Accounting Standards Update 2018-02) at Dec. 31, 2018		$ (2)					$ 40			$ (42)			$ (2)					$ 0					$ 2			$ (2)
Net income	2,362					2,198						2,198			164		774					767						767		7
Other comprehensive income	(140)								(133)			(133)			(7)		(2)								(4)			(4)		2
Equity contribution from Sempra Energy																	322			322								322
Contributions	175														175		175													175
Distributions	(98)			5								5			(103)		(3)													(3)
Deconsolidations	(440)														(440)		(281)													(281)
Common stock dividends declared	(1,086)					(1,086)						(1,086)
Ending balance at Dec. 31, 2019	21,805		$ 21,796	7,480	$ 7,480	11,130		$ 11,123	(939)		$ (939)	19,929		$ 19,922	1,876	$ 1,874	7,100			1,660		5,456			(16)			7,100		0
Net income	4,105					3,933						3,933			172		824					824						824
Other comprehensive income	422								446			446			(24)		6								6			6
Contributions	1														1
Distributions	(1)														(1)
Deconsolidations	(236)														(236)
Common stock dividends declared	(1,214)					(1,214)						(1,214)					(200)					(200)						(200)
Ending balance at Dec. 31, 2020	24,934			7,053		13,673			(500)			23,373			1,561		7,730			1,660		6,080			(10)			7,730
Net income	1,463					1,318						1,318			145		819					819						819
Other comprehensive income	171								160			160			11
Contributions	4														4
Deconsolidations	1														1
Common stock dividends declared	(1,379)					(1,379)						(1,379)					(300)					(300)						(300)
Ending balance at Dec. 31, 2021	$ 27,419			$ 11,862		$ 13,548			$ (318)			$ 25,981			$ 1,438		$ 8,249			$ 1,660		$ 6,599			$ (10)			$ 8,249		$ 0