INCOME TAXES - COMPONENTS OF INCOME TAX EXPENSE (BENEFIT) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S.	$ 346	$ 1,461	$ 1,191
Non-U.S.	487	322	573
Pretax income	833	1,783	1,764
Current:
U.S. state	(6)	(22)	(14)
Non-U.S.	183	112	140
Total	177	90	126
Deferred:
U.S. federal	(9)	157	87
U.S. state	(37)	36	21
Non-U.S.	(31)	(34)	84
Total	(77)	159	192
Deferred investment tax credits	(1)	0	(3)
Total income tax expense	99	249	315
San Diego Gas and Electric Company [Member]
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Pretax income	1,020	1,014	945
Current:
U.S. federal	35	121	35
U.S. state	13	34	31
Total	48	155	66
Deferred:
U.S. federal	99	11	75
U.S. state	54	25	32
Total	153	36	107
Deferred investment tax credits	0	(1)	(2)
Total income tax expense	201	190	171
SoCalGas
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Pretax income	(736)	601	762
Current:
U.S. federal	134	163	8
U.S. state	50	45	24
Total	184	208	32
Deferred:
U.S. federal	(334)	(85)	79
U.S. state	(159)	(28)	10
Total	(493)	(113)	89
Deferred investment tax credits	(1)	1	(1)
Total income tax expense	$ (310)	$ 96	$ 120