Property, Plant and Equipment - Narrative (Details) - SCE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Capitalized software costs	$ 2,500	$ 2,100
Capitalized software, accumulated amortization	1,100	900
Capitalized software, amortization expense	416	$ 358	$ 344
Capitalized software, estimated amortization year 1	428
Capitalized software, estimated amortization year 2	371
Capitalized software, estimated amortization year 3	288
Capitalized software, estimated amortization year 4	186
Capitalized software, estimated amortization year 5	$ 72
Software and Software Development Costs | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Software and Software Development Costs | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years