GENERAL INFORMATION AND OTHER FINANCIAL DATA - RECLASSIFICATION FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 403	$ 328	$ 1,195	$ 944
Equity earnings	(472)	(454)	(1,190)	(1,235)
Energy-related businesses	(528)	(512)	(1,408)	(1,360)
Other income, net	(49)	(65)	(199)	(194)
Income before income taxes and equity earnings	(160)	(200)	(1,109)	(1,213)
Income tax expense (benefit)	482	(105)	711	(63)
Net income	(150)	(759)	(1,588)	(2,511)
Net income, Non-controlling interest (after tax)	55	110	103	325
Total, net of income tax and after NCI	(95)	(649)	(1,485)	(2,186)
SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	93	82	272	237
Other income, net	3	(13)	(37)	(73)
Income before income taxes and equity earnings	49	66	(523)	(477)
Income tax expense (benefit)	(95)	(52)	(51)	1
Net income	(46)	14	(574)	(476)
Total, net of income tax and after NCI	(46)	14	(574)	(476)
SDG&E
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	141	131	415	390
Other income, net	(32)	(30)	(103)	(86)
Income before income taxes and equity earnings	(291)	(276)	(768)	(759)
Income tax expense (benefit)	(33)	15	(12)	89
Net income	(324)	(261)	(780)	(670)
Total, net of income tax and after NCI	(324)	(261)	(780)	(670)
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	10	(3)	17	(10)
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	6	0	11	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	(4)	(10)	(7)	(41)
Income tax expense (benefit)	1	3	2	9
Net income	(3)	(7)	(5)	(32)
Total, net of income tax and after NCI	(2)	(5)
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	(4)	(3)	(6)	(9)
Equity earnings	(6)	(5)	(10)	(20)
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	3	(1)	4	(5)
Energy-related businesses	2	0	3	(5)
Other income, net	1	(1)	2	(2)
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]
Net income, Non-controlling interest (after tax)	1	2	3	11
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	5	5
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	1	2
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
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	12	0	16	9
Reclassification out of Accumulated Other Comprehensive Income | Settlement charges | SoCalGas
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	6	0	10	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	14	3	22	16
Income tax expense (benefit)	(2)	(1)	(3)	(5)
Net income	12	2	19	11
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	6	0	12	1
Income tax expense (benefit)	(1)	0	(2)	0
Net income	5	0	10	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			(2)	(21)
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	$ 0	$ 1	$ 1