GENERAL INFORMATION AND OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	[1]			$ 28,675
Total other comprehensive income (loss), net of tax amount, attributable to parent		$ (64)	$ 107	(35)		$ 121
Ending balance		29,703		29,703
AOCI associated with noncontrolling interests		(176)	202	(13)		212
Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(121)	(121)	(150)		(135)
OCI before reclassifications		(61)	111	(25)		132
Amounts reclassified from AOCI		(3)	(50)	(10)		(57)
Total other comprehensive income (loss), net of tax amount, attributable to parent		(64)	61	(35)		75
Ending balance		(185)	(60)	(185)		(60)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(49)	(38)	(36)		(59)
OCI before reclassifications		(12)	(5)	(25)		16
Amounts reclassified from AOCI		0	0	0		0
Total other comprehensive income (loss), net of tax amount, attributable to parent		(12)	(5)	(25)		16
Ending balance		(61)	(43)	(61)		(43)
Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		35	14	3		10
OCI before reclassifications		(49)	116	(1)		129
Amounts reclassified from AOCI		(5)	(51)	(21)		(60)
Total other comprehensive income (loss), net of tax amount, attributable to parent		(54)	65	(22)		69
Ending balance		(19)	79	(19)		79
AOCI associated with noncontrolling interests			(46)			(46)
Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(107)	(97)	(117)		(86)
OCI before reclassifications		0	0	1		(13)
Amounts reclassified from AOCI		2	1	11		3
Total other comprehensive income (loss), net of tax amount, attributable to parent		2	1	12		(10)
Ending balance		(105)	(96)	(105)		(96)
SDG&E
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		10,311	9,509	9,902	[1]	9,067
Ending balance		10,347	9,683	10,347		9,683
SDG&E | Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(8)	(7)	(8)		(7)
Ending balance		(8)	(7)	(8)		(7)
SDG&E | Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(8)	(7)	(8)		(7)
Ending balance		(8)	(7)	(8)		(7)
SoCalGas
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		7,901	7,215	7,410	[1]	6,698
Total other comprehensive income (loss), net of tax amount, attributable to parent			0	2		2
Ending balance		7,887	7,231	7,887		7,231
SoCalGas | Total accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(21)	(22)	(23)		(24)
Amounts reclassified from AOCI				2		2
Total other comprehensive income (loss), net of tax amount, attributable to parent				2		2
Ending balance		(21)	(22)	(21)		(22)
SoCalGas | Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(10)	(11)	(11)		(12)
Amounts reclassified from AOCI				1		1
Total other comprehensive income (loss), net of tax amount, attributable to parent				1		1
Ending balance		(10)	(11)	(10)		(11)
SoCalGas | Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(11)	(11)	(12)		(12)
Amounts reclassified from AOCI				1		1
Total other comprehensive income (loss), net of tax amount, attributable to parent				1		1
Ending balance		$ (11)	$ (11)	$ (11)		$ (11)

[1] Derived from audited financial statements.