Commitments and Contingencies - Nuclear Insurance (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2023	Dec. 31, 2024
San Onofre
Commitments and Contingencies
Federal loss limit, bodily injury and property damage from nuclear incident		$ 560
Palo Verde (nuclear)
Commitments and Contingencies
Federal loss limit, bodily injury and property damage from nuclear incident		16,300
SCE and other owners of San Onofre and Palo Verde
Commitments and Contingencies
Maximum private primary insurance	$ 500
SCE
Commitments and Contingencies
Maximum per incident, prior events		255
Maximum per incident, prior events, annually		38
Limit on retroactive premium adjustments assessment, per year		17
SCE | San Onofre
Commitments and Contingencies
Minimum federal requirement of nuclear property insurance		50
SCE | Palo Verde (nuclear)
Commitments and Contingencies
Maximum per incident		79
Maximum per incident annual		12
Minimum federal requirement of nuclear property insurance		$ 1,100