CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - SCG - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred stock	Preferred stock 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	SoCalGas	SoCalGas Cumulative Effect, Period of Adoption, Adjustment	SoCalGas Cumulative Effect, Period of Adoption, Adjusted Balance	SoCalGas Preferred stock	SoCalGas Preferred stock Cumulative Effect, Period of Adoption, Adjusted Balance	SoCalGas Common stock	SoCalGas Common stock Cumulative Effect, Period of Adoption, Adjusted Balance	SoCalGas Retained earnings	SoCalGas Retained earnings Cumulative Effect, Period of Adoption, Adjustment	SoCalGas Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance	SoCalGas Accumulated other comprehensive income (loss)	SoCalGas Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment	SoCalGas Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning Balance at Dec. 31, 2018	$ 19,248		$ 19,263	$ 2,258	$ 2,258	$ 5,540	$ 5,540	$ 10,104		$ 10,161	$ (764)		$ (806)	$ 4,258		$ 4,256	$ 22	$ 22	$ 866	$ 866	$ 3,390		$ 3,392	$ (20)		$ (24)
Beginning Balance (Accounting Standards Update 2018-02) at Dec. 31, 2018		$ (2)							$ 40			$ (42)			$ (2)							$ 2			$ (4)
Net (loss) income	2,362							2,198						642							642
Other comprehensive income	(140)										(133)			1										1
Preferred stock dividends declared														(1)							(1)
Common stock dividends declared	(1,086)							(1,086)						(150)							(150)
Ending balance at Dec. 31, 2019	21,805		$ 21,796	2,258	$ 2,258	7,480	$ 7,480	11,130		$ 11,123	(939)		$ (939)	4,748			22		866		3,883			(23)
Net (loss) income	4,105							3,933						505							505
Other comprehensive income	422										446			(8)										(8)
Preferred stock dividends declared														(1)							(1)
Common stock dividends declared	(1,214)							(1,214)						(100)							(100)
Ending balance at Dec. 31, 2020	24,934			3,147		7,053		13,673			(500)			5,144			22		866		4,287			(31)
Net (loss) income	1,463							1,318						(426)							(426)
Other comprehensive income	171										160
Preferred stock dividends declared														(1)							(1)
Common stock dividends declared	(1,379)							(1,379)						(75)							(75)
Equity contribution from Sempra Energy														800					800
Ending balance at Dec. 31, 2021	$ 27,419			$ 889		$ 11,862		$ 13,548			$ (318)			$ 5,442			$ 22		$ 1,666		$ 3,785			$ (31)