SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 28,675
Total other comprehensive income, net of tax amount, attributable to parent	(16)	$ 31	$ 174
Ending balance	31,222	28,675
AOCI associated with noncontrolling interests	11	(28)	54
SDG&E
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	9,902
Total other comprehensive income, net of tax amount, attributable to parent	(4)	(1)	3
Ending balance	10,564	9,902
SoCalGas
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	7,410	6,698	5,442
Total other comprehensive income, net of tax amount, attributable to parent	(4)	1	7
Ending balance	8,161	7,410	6,698
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(150)	(135)	(318)
OCI before reclassifications	3	47	146
Amounts reclassified from AOCI	(19)	(62)	37
Total other comprehensive income, net of tax amount, attributable to parent	(16)	(15)	183
Ending balance	(166)	(150)	(135)
Accumulated other comprehensive income (loss) | SDG&E
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8)	(7)	(10)
OCI before reclassifications	(3)	(2)	2
Amounts reclassified from AOCI	(1)	1	1
Total other comprehensive income, net of tax amount, attributable to parent	(4)	(1)	3
Ending balance	(12)	(8)	(7)
Accumulated other comprehensive income (loss) | SoCalGas
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(23)	(24)	(31)
OCI before reclassifications	(5)	(1)	4
Amounts reclassified from AOCI	1	2	3
Total other comprehensive income, net of tax amount, attributable to parent	(4)	1	7
Ending balance	(27)	(23)	(24)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(36)	(59)	(79)
OCI before reclassifications	(30)	23	10
Amounts reclassified from AOCI	0	0	10
Total other comprehensive income, net of tax amount, attributable to parent	(30)	23	20
Ending balance	(66)	(36)	(59)
AOCI associated with noncontrolling interests			9
Financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	3	10	(156)
OCI before reclassifications	34	59	147
Amounts reclassified from AOCI	(22)	(66)	19
Total other comprehensive income, net of tax amount, attributable to parent	12	(7)	166
Ending balance	15	3	10
AOCI associated with noncontrolling interests		(46)
Financial instruments | SoCalGas
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(11)	(12)	(13)
OCI before reclassifications	0	0	0
Amounts reclassified from AOCI	1	1	1
Total other comprehensive income, net of tax amount, attributable to parent	1	1	1
Ending balance	(10)	(11)	(12)
Pension and PBOP
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(117)	(86)	(83)
OCI before reclassifications	(1)	(35)	(11)
Amounts reclassified from AOCI	3	4	8
Total other comprehensive income, net of tax amount, attributable to parent	2	(31)	(3)
Ending balance	(115)	(117)	(86)
Pension and PBOP | SDG&E
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8)	(7)	(10)
OCI before reclassifications	(3)	(2)	2
Amounts reclassified from AOCI	(1)	1	1
Total other comprehensive income, net of tax amount, attributable to parent	(4)	(1)	3
Ending balance	(12)	(8)	(7)
Pension and PBOP | SoCalGas
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(12)	(12)	(18)
OCI before reclassifications	(5)	(1)	4
Amounts reclassified from AOCI	0	1	2
Total other comprehensive income, net of tax amount, attributable to parent	(5)	0	6
Ending balance	$ (17)	$ (12)	$ (12)