GENERAL INFORMATION AND OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026		Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		$ 38,793	[1]	$ 37,788
Total other comprehensive [income (loss)]		7		(34)
Ending balance		39,474		38,202
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]	31,594
Total other comprehensive income (loss), net of tax amount, attributable to parent		6		(29)
Ending balance		32,239
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(197)		(166)
OCI before reclassifications		8		(33)
Amounts reclassified from AOCI		(2)		4
Total other comprehensive [income (loss)]		6		(29)
Ending balance		(191)		(195)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(45)		(66)
OCI before reclassifications		(2)		0
Amounts reclassified from AOCI		0		0
Total other comprehensive [income (loss)]		(2)		0
Ending balance		(47)		(66)
Financial instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(54)		15
OCI before reclassifications		5		(31)
Amounts reclassified from AOCI		(3)		(1)
Total other comprehensive [income (loss)]		2		(32)
Ending balance		(52)		(17)
Pension and PBOP
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(98)		(115)
OCI before reclassifications		5		(2)
Amounts reclassified from AOCI		1		5
Total other comprehensive [income (loss)]		6		3
Ending balance		(92)		(112)
SDG&E
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		10,933	[2]	10,564
Ending balance		11,229		10,845
SDG&E | Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(6)		(12)
Ending balance		(6)		(12)
SDG&E | Pension and PBOP
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(6)		(12)
Ending balance		(6)		(12)
SoCalGas
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive [income (loss)]				2
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		8,836	[3]	8,161
OCI before reclassifications				(2)
Amounts reclassified from AOCI				4
Total other comprehensive income (loss), net of tax amount, attributable to parent				2
Ending balance		9,260		8,606
SoCalGas | Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive [income (loss)]				2
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(17)		(27)
Total other comprehensive income (loss), net of tax amount, attributable to parent				2
Ending balance		(17)		(25)
SoCalGas | Financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(9)		(10)
OCI before reclassifications				0
Amounts reclassified from AOCI				0
Total other comprehensive income (loss), net of tax amount, attributable to parent				0
Ending balance		(9)		(10)
SoCalGas | Pension and PBOP
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(8)		(17)
OCI before reclassifications				(2)
Amounts reclassified from AOCI				4
Total other comprehensive income (loss), net of tax amount, attributable to parent				2
Ending balance		$ (8)		$ (15)

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.

[3] Derived from audited financial statements.