GENERAL INFORMATION AND OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	[1]			$ 27,115
OCI before reclassifications		$ 64	$ 39	21	$ 122
Amounts reclassified from AOCI		(3)	23	(7)	29
Net OCI		61	62	14	151
Ending balance		27,836		27,836
Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(182)	(229)	(135)	(318)
Ending balance		(121)	(167)	(121)	(167)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(49)	(76)	(59)	(79)
OCI before reclassifications		11	1	21	4
Amounts reclassified from AOCI		0	10	0	10
Net OCI		11	11	21	14
Ending balance		(38)	(65)	(38)	(65)
AOCI associated with noncontrolling interests			9	9
Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(35)	(78)	10	(156)
OCI before reclassifications		53	37	13	111
Amounts reclassified from AOCI		(4)	11	(9)	15
Net OCI		49	48	4	126
Ending balance		14	(30)	14	(30)
Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(98)	(75)	(86)	(83)
OCI before reclassifications		0	1	(13)	7
Amounts reclassified from AOCI		1	2	2	4
Net OCI		1	3	(11)	11
Ending balance		(97)	(72)	(97)	(72)
San Diego Gas and Electric Company
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	[1]			9,067
Ending balance		9,509		9,509
San Diego Gas and Electric Company | Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(7)	(10)	(7)	(10)
Ending balance		(7)	(10)	(7)	(10)
San Diego Gas and Electric Company | Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(7)	(10)	(7)	(10)
Ending balance		(7)	(10)	(7)	(10)
Southern California Gas Company
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	[1]			6,698
Amounts reclassified from AOCI		1	1	2	2
Net OCI		1	1	2	2
Ending balance		7,215		7,215
Southern California Gas Company | Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(23)	(30)	(24)	(31)
Ending balance		(22)	(29)	(22)	(29)
Southern California Gas Company | Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(12)	(13)	(12)	(13)
Amounts reclassified from AOCI		1	1	1	1
Net OCI		1	1	1	1
Ending balance		(11)	(12)	(11)	(12)
Southern California Gas Company | Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(11)	(17)	(12)	(18)
Amounts reclassified from AOCI		0	0	1	1
Net OCI		0	0	1	1
Ending balance		$ (11)	$ (17)	$ (11)	$ (17)

[1] Derived from audited financial statements.