Commitments and Contingencies - Expense Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies
Charge for wildfire-related claims	$ 743
Expected insurance recoveries	(3,335)
Subsidiary of Common Parent
Commitments and Contingencies
Charge for wildfire-related claims	4	$ 3	$ 9
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Charge for wildfire-related claims	490
Expected insurance recoveries	(2,440)
SCE
Commitments and Contingencies
Charge for wildfire-related claims	743	814	1,868
Expected insurance recoveries	(96)	(149)	(399)
Expected recoveries through electric rates	(36)	(39)	(238)
Total pre-tax charge	611	626	1,231
Income tax benefit	(172)	(174)	(344)
Total after-tax charge	439	452	887
SCE | 2017/2018 Wildfire/Mudslide Events And The Other Wildfire Events
Commitments and Contingencies
Expected insurance recoveries	(2,700)
Expected recoveries through electric rates	(617)
SCE | 2017/2018 Wildfire/Mudslide Events And The Other Wildfire Events | Aggregate
Commitments and Contingencies
Charge for wildfire-related claims	11,000
Total after-tax charge	5,600
SCE | Other Wildfire Events
Commitments and Contingencies
Charge for wildfire-related claims	253	184	572
Expected insurance recoveries	(96)	(149)	(399)
Expected recoveries through electric rates	(9)	(2)	(162)
Total pre-tax charge	148	33	11
Income tax benefit	(42)	(9)	(3)
Total after-tax charge	106	24	8
SCE | 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Charge for wildfire-related claims	490	630	1,296
Expected insurance recoveries	0	0	0
Expected recoveries through electric rates	(27)	(37)	(76)
Total pre-tax charge	463	593	1,220
Income tax benefit	(130)	(165)	(341)
Total after-tax charge	333	$ 428	$ 879
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate
Commitments and Contingencies
Expected insurance recoveries	$ (2,000)