Commitments and Contingencies (Nuclear) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2021
Palo Verde (nuclear)
Commitments and Contingencies
Federal loss limit, bodily injury and property damage from nuclear incident	$ 13,700
San Onofre
Commitments and Contingencies
Federal loss limit, bodily injury and property damage from nuclear incident	560
SCE
Commitments and Contingencies
Limit on retroactive premium adjustments assessment, per year	30
SCE | Palo Verde (nuclear)
Commitments and Contingencies
Minimum federal requirement of nuclear property insurance	1,100
Maximum per incident	65
Maximum per incident annual	10
Maximum per incident, prior events	255
Maximum per incident, prior events, annually	38
SCE | San Onofre
Commitments and Contingencies
Minimum federal requirement of nuclear property insurance	$ 50
SCE and other owners of San Onofre and Palo Verde
Commitments and Contingencies
Maximum private primary insurance		$ 450