GENERAL INFORMATION AND OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		$ 38,296	$ 35,419	$ 37,788	[1]	$ 33,654
Total other comprehensive income		5	(240)	(51)		(48)
Ending balance		38,286	35,880	38,286		35,880
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]			31,222
Total other comprehensive income (loss), net of tax amount, attributable to parent		3	(64)	(46)		(35)
Ending balance		31,152		31,152
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(215)	(121)	(166)		(150)
OCI before reclassifications		(7)	(61)	(63)		(25)
Amounts reclassified from AOCI		10	(3)	17		(10)
Total other comprehensive income		3	(64)	(46)		(35)
Ending balance		(212)	(185)	(212)		(185)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(55)	(49)	(66)		(36)
OCI before reclassifications		5	(12)	16		(25)
Amounts reclassified from AOCI		0	0	0		0
Total other comprehensive income		5	(12)	16		(25)
Ending balance		(50)	(61)	(50)		(61)
Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(50)	35	15		3
OCI before reclassifications		(11)	(49)	(76)		(1)
Amounts reclassified from AOCI		(2)	(5)	(2)		(21)
Total other comprehensive income		(13)	(54)	(78)		(22)
Ending balance		(63)	(19)	(63)		(19)
Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(110)	(107)	(115)		(117)
OCI before reclassifications		(1)	0	(3)		1
Amounts reclassified from AOCI		12	2	19		11
Total other comprehensive income		11	2	16		12
Ending balance		(99)	(105)	(99)		(105)
SDG&E
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		11,020	10,311	10,564	[2]	9,902
Ending balance		11,344	10,347	11,344		10,347
SDG&E | Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(12)	(8)	(12)		(8)
Ending balance		(12)	(8)	(12)		(8)
SDG&E | Pension and PBOP
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(12)	(8)	(12)		(8)
Ending balance		(12)	(8)	(12)		(8)
SoCalGas
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive income		6		9		2
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		8,691	7,901	8,161	[3]	7,410
OCI before reclassifications				(2)
Amounts reclassified from AOCI		6		11		2
Total other comprehensive income (loss), net of tax amount, attributable to parent		6		9		2
Ending balance		8,743	7,887	8,743		7,887
SoCalGas | Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive income		6		9		2
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(24)	(21)	(27)		(23)
Ending balance		(18)	(21)	(18)		(21)
SoCalGas | Financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(10)	(10)	(10)		(11)
OCI before reclassifications				0
Amounts reclassified from AOCI		1		1		1
Total other comprehensive income (loss), net of tax amount, attributable to parent		1		1		1
Ending balance		(9)	(10)	(9)		(10)
SoCalGas | Pension and PBOP
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(14)	(11)	(17)		(12)
OCI before reclassifications				(2)
Amounts reclassified from AOCI		5		10		1
Total other comprehensive income (loss), net of tax amount, attributable to parent		5		8		1
Ending balance		$ (9)	$ (11)	$ (9)		$ (11)

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.

[3] Derived from audited financial statements.