Commitments and Contingencies - Recoveries (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended					13 Months Ended	75 Months Ended
	Feb. 28, 2025	Jul. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2025
Commitments and Contingencies
Increase in accrued estimated losses			$ 21.0
SCE
Commitments and Contingencies
Increase in accrued estimated losses			21.0	$ 670.0
Insurance and other third party recoveries			82.0	56.0
Total after-tax charge			(976.0)	417.0
Wildfire insurance expense	$ 50.0						$ 450.0
SCE | Wildfire Liability Insurance | Subsidiary of Common Parent
Commitments and Contingencies
Proceeds from self-insurance program			74.0		$ 300.0	$ 150.0
Proceeds from self-insurance program, additional amount authorized for collection			226.0
SCE | Commercial insurance carriers
Commitments and Contingencies
Wildfire insurance expense							357.0
2017/2018 Wildfire/Mudslide Events And The Other Wildfire Events | SCE
Commitments and Contingencies
Insurance and other third party recoveries											$ 2,800.0
Loss contingency, estimated recovery from electric rates											1,900.0
Other Wildfire Events Related Claims | SCE
Commitments and Contingencies
Increase in accrued estimated losses			21.0	180.0
Insurance and other third party recoveries			82.0	56.0
Total after-tax charge			(10.0)	84.0
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Increase in accrued estimated losses			0.0
2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Increase in accrued estimated losses			0.0	490.0
Insurance and other third party recoveries			0.0	0.0
Total after-tax charge			(966.0)	$ 333.0
Wildfire insurance coverage			1,000.0
Self insurance			10.0
November 2018-Woolsey | SCE
Commitments and Contingencies
Wildfire insurance coverage			1,000.0
Self insurance			10.0
Aggregate | 2017/2018 Wildfire/Mudslide Events And The Other Wildfire Events | SCE
Commitments and Contingencies
Increase in accrued estimated losses											11,000.0
Total after-tax charge											$ 4,600.0
Aggregate | 2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Insurance and other third party recoveries			2,000.0
Aggregate | 2017 Creek Fire | SCE
Commitments and Contingencies
Insurance and other third party recoveries			$ 18.0
Insurance Coverage Through June 2022 | SCE
Commitments and Contingencies
Wildfire insurance coverage							1,000.0	$ 1,000.0	$ 1,000.0	$ 1,200.0
Self insurance							63.0	163.0	130.0	165.0
Insurance coverage through June 2023 | SCE
Commitments and Contingencies
Coverage net							$ 937.0	$ 837.0	$ 870.0	$ 1,000.0
Customer-funded self-insurance | SCE
Commitments and Contingencies
Wildfire insurance coverage		$ 1,000.0
Rate funded wildfire self-insurance program future proceeds, assuming no claims		$ 300.0
Shareholder contribution on self insurance (as a percent)		2.50%
Threshold before shareholder contributions		$ 500.0
Maximum annual shareholder contribution		$ 12.5