SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - RECLASSIFICATION FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operation and maintenance	$ 5,459	$ 4,746	$ 4,341
Interest expense	(1,309)	(1,054)	(1,198)
Equity earnings	1,481	1,498	1,343
Energy-related businesses	2,891	1,788	1,866
Other income, net	(131)	(24)	(58)
Income before income taxes and equity earnings	2,627	1,343	219
Income tax benefit (expense)	(490)	(556)	(99)
Earnings attributable to noncontrolling interests	(543)	(146)	(145)
Total, net of income tax and after NCI	3,075	2,139	1,318
Net income (loss)	3,618	2,285	1,463
SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(497)	(449)	(412)
Other income, net	(97)	(92)	(64)
Income before income taxes and equity earnings	910	1,097	1,020
Income tax benefit (expense)	26	(182)	(201)
Total, net of income tax and after NCI	936	915	819
Net income (loss)	936	915	819
SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(285)	(198)	(157)
Other income, net	4	8	14
Income before income taxes and equity earnings	807	738	(736)
Income tax benefit (expense)	5	(138)	310
Total, net of income tax and after NCI	812	600	(426)
Net income (loss)	812	600	(426)
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	(16)	28	80
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	2	3	2
Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operation and maintenance	0	1	0
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	3	7	8
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	0	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	2	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	4	4
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	1	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	0	0	7
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	5	11	19
Income tax benefit (expense)	(1)	(3)	(5)
Income (loss) from continuing operations, net of tax	4	8	14
Reclassification out of Accumulated Other Comprehensive Income | Pension and other postretirement benefits | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax benefit (expense)	(1)	(1)	0
Income (loss) from continuing operations, net of tax	2	3	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]
Other income, net	(6)	(12)	6
Income before income taxes and equity earnings	(49)	16	92
Income tax benefit (expense)	6	(6)	(24)
Income (loss) from continuing operations, net of tax	(43)	10	68
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 (loss)	1	2	2
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	1	1	11
Equity earnings	(48)	29	73
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	0	0
Energy-related businesses	1	(1)	1
Other income, net	2	1	0
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	(1)	(2)	1
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	23	9	(2)
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	(20)	19	66
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	$ 0