FAIR VALUE MEASUREMENTS - RECURRING FAIR VALUE MEASURES (Details) - Recurring - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	$ 883	$ 890
Short-term investments held in Rabbi Trust	46	64
Support Agreement, net of related guarantee fees	38	25
Netting adjustment	70	20
Total	1,309	1,347
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	(51)	(59)
Total	73	70
Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	18	10
Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	280	298
Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	585	582
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	61	67
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	288	287
Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	236	228
Interest rate instruments
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	0	0
Derivative assets, Total	220	293
Foreign exchange instruments
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	0	0
Derivative assets, Total	1	5
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	0
Derivative liabilities	1
Commodity contracts not subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	59	2
Derivative assets, Total	92	41
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	(28)	(38)
Derivative liabilities	37	26
Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	11	18
Derivative assets, Total	29	29
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	(23)	(21)
Derivative liabilities	35	44
Level 1
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	328	344
Short-term investments held in Rabbi Trust	46	64
Support Agreement, net of related guarantee fees	0	0
Total	383	414
Liabilities, Fair Value Disclosure [Abstract]
Total	18	21
Level 1 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	16	8
Level 1 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	277	295
Level 1 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	35	41
Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	35	41
Level 1 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 1 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 1 | Interest rate instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Level 1 | Foreign exchange instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0
Level 1 | Commodity contracts not subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0	1
Level 1 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	9	6
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	18	20
Level 2
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	555	546
Short-term investments held in Rabbi Trust	0	0
Support Agreement, net of related guarantee fees	0	0
Total	814	884
Liabilities, Fair Value Disclosure [Abstract]
Total	106	108
Level 2 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	2	2
Level 2 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	3	3
Level 2 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	550	541
Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	26	26
Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	288	287
Level 2 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	236	228
Level 2 | Interest rate instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	220	293
Level 2 | Foreign exchange instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	1	5
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	1
Level 2 | Commodity contracts not subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	33	39
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	65	63
Level 2 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	5	1
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	40	45
Level 3
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Short-term investments held in Rabbi Trust	0	0
Support Agreement, net of related guarantee fees	38	25
Total	42	29
Liabilities, Fair Value Disclosure [Abstract]
Total	0	0
Level 3 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Level 3 | Interest rate instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Level 3 | Foreign exchange instruments
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0
Level 3 | Commodity contracts not subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0	0
Level 3 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	4	4
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0	0
SDG&E
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	883	890
Netting adjustment	14	17
Total	910	915
SDG&E | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	18	10
SDG&E | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	280	298
SDG&E | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	585	582
SDG&E | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	61	67
SDG&E | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	288	287
SDG&E | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	236	228
SDG&E | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	14	17
Derivative assets, Total	27	25
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	(18)	(18)
Derivative liabilities	1	1
SDG&E | Level 1
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	328	344
Total	337	348
SDG&E | Level 1 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	16	8
SDG&E | Level 1 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	277	295
SDG&E | Level 1 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	35	41
SDG&E | Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	35	41
SDG&E | Level 1 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 1 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 1 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	9	4
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	18	18
SDG&E | Level 2
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	555	546
Total	555	546
SDG&E | Level 2 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	2	2
SDG&E | Level 2 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	3	3
SDG&E | Level 2 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	550	541
SDG&E | Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	26	26
SDG&E | Level 2 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	288	287
SDG&E | Level 2 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	236	228
SDG&E | Level 2 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	1	1
SDG&E | Level 3
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
Total	4	4
SDG&E | Level 3 | Short-term investments, primarily cash equivalents
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Total debt securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Other securities
Assets, Fair Value Disclosure [Abstract]
Total nuclear decommissioning trusts	0	0
SDG&E | Level 3 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	4	4
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0	0
SoCalGas | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Netting adjustment	(3)	1
Derivative assets, Total	2	4
Liabilities, Fair Value Disclosure [Abstract]
Netting adjustment	(5)	(3)
Derivative liabilities	34	43
SoCalGas | Level 1 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	2
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	0	2
SoCalGas | Level 2 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	5	1
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	39	44
SoCalGas | Level 3 | Commodity contracts subject to rate recovery
Assets, Fair Value Disclosure [Abstract]
Derivative asset, before netting	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liability, before netting	$ 0	$ 0