SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - RECLASSIFICATION FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 1,532	$ 1,049	$ 1,309
Equity earnings	(1,604)	(1,609)	(1,481)
Energy-related businesses	(1,831)	(1,748)	(2,891)
Other income, net	(169)	(136)	(131)
Income before income taxes and equity earnings	(1,169)	(2,110)	(2,627)
Income tax (benefit) expense	701	219	490
Net income	(2,072)	(3,500)	(3,618)
Total, net of income tax and after NCI	(1,837)	(2,862)	(3,075)
SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	559	525	497
Other income, net	(106)	(90)	(97)
Income before income taxes and equity earnings	(435)	(1,044)	(910)
Income tax (benefit) expense	(128)	153	(26)
Net income	(563)	(891)	(936)
Total, net of income tax and after NCI	(563)	(891)	(936)
SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	367	323	285
Other income, net	6	(25)	4
Income before income taxes and equity earnings	(828)	(987)	(807)
Income tax (benefit) expense	(38)	31	(5)
Net income	(866)	(956)	(812)
Total, net of income tax and after NCI	(866)	(956)	(812)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, net of income tax and after NCI	20	(19)	(16)
Reclassification out of Accumulated Other Comprehensive Income | SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, net of income tax and after NCI	1	(1)	1
Reclassification out of Accumulated Other Comprehensive Income | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, net of income tax and after NCI	12	1	2
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	(7)	(47)	(49)
Income tax (benefit) expense	3	11	6
Net income	(4)	(36)	(43)
Total, net of income tax and after NCI	(1)	(22)	(20)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	11	0	1
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Interest rate instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(7)	(11)	1
Equity earnings	(10)	(23)	(48)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Foreign exchange instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Equity earnings	5	(6)	2
Energy-related businesses	3	(5)	1
Other income, net	2	(2)	2
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Interest rate and foreign exchange instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	0	0	(1)
Other income, net	0	0	(6)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings attributable to noncontrolling interests	3	14	23
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	24	18	5
Income tax (benefit) expense	(3)	(15)	(1)
Net income	21	3	4
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits | SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	1	1	1
Income tax (benefit) expense	0	(2)	0
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	12	2	2
Income tax (benefit) expense	(1)	(2)	(1)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	6	6	3
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss | SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	1	1	0
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	1	1	1
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	2	3	2
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service cost | SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	0	0	1
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service cost | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	1	1	1
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	16	9	0
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	10	0	0
Reclassification out of Accumulated Other Comprehensive Income | Financial instruments | Interest rate instruments | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 1	$ 1	$ 1