GENERAL INFORMATION AND OTHER FINANCIAL DATA - RECLASSIFICATION FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (433)	$ (305)
Energy-related businesses	(381)	(475)
Other income, net	(91)	(99)
Income before income taxes and equity earnings	(651)	(705)
Income tax (expense) benefit	(57)	(172)
Earnings attributable to noncontrolling interests	(2)	(69)
Total, net of income tax and after NCI	(917)	(812)
Net income	(919)	(881)
SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(90)	(77)
Other income, net	(42)	(47)
Income before income taxes and equity earnings	(481)	(402)
Income tax (expense) benefit	(38)	(43)
Total, net of income tax and after NCI	(443)	(359)
Net income	(443)	(359)
SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(135)	(128)
Other income, net	(40)	(33)
Income before income taxes and equity earnings	(295)	(263)
Income tax (expense) benefit	(14)	(40)
Total, net of income tax and after NCI	(281)	(223)
Net income	(281)	(223)
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	4	(4)
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	4	1
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	(3)	(13)
Income tax (expense) benefit	1	3
Net income	(2)	(10)
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	(2)	(3)
Equity earnings	(5)	(5)
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	2	(2)
Energy-related businesses	2	(3)
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	1	4
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	2	2
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	0
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	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	0	1
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	4	0
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	4	0
Reclassification out of Accumulated Other Comprehensive Income | Pension and PBOP
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	6	3
Income tax (expense) benefit	(1)	(1)
Net income	5	2
Reclassification out of Accumulated Other Comprehensive Income | Pension and PBOP | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity earnings	5	1
Income tax (expense) benefit	(1)	0
Net income	4	1
Reclassification out of Accumulated Other Comprehensive Income | Financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, net of income tax and after NCI	$ (1)	$ (6)