Property, Plant and Equipment - Schedule of Utility Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ (14,207)	$ (12,910)
Total utility property, plant and equipment	59,047	55,877
SCE
Property, Plant and Equipment [Line Items]
Distribution	37,093	34,573
Transmission	19,189	18,526
Generation	4,217	3,593
General plant and other	7,046	6,383
Accumulated depreciation	(14,207)	(12,910)
Total utility property, plant and equipment, Gross	53,338	50,165
Construction work in progress	5,585	5,590
Nuclear fuel, at amortized cost	124	122
Total utility property, plant and equipment	$ 59,047	$ 55,877