SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - ASSET RETIREMENT OBLIGATIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 3,538	$ 3,289	$ 3,083
Accretion expense	141	133	127
Liabilities incurred and acquired	21	20	2
Payments	(57)	(63)	(63)
Revisions	69	159	140
Ending Balance	3,712	3,538	3,289
San Diego Gas and Electric Company
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	890	876	866
Accretion expense	37	38	39
Liabilities incurred and acquired	6	2	0
Payments	(54)	(60)	(60)
Revisions	8	34	31
Ending Balance	887	890	876
Revisions for early decommissioning of SONGS	1	22
SoCalGas
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	2,582	2,368	2,177
Accretion expense	101	92	86
Liabilities incurred and acquired	0	0	0
Payments	(3)	(3)	(2)
Revisions	63	125	107
Ending Balance	$ 2,743	$ 2,582	$ 2,368