Commitments and Contingencies (Nuclear) (Details) - SCE $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Commitments and Contingencies
Limit on retroactive premium adjustments assessment, per year	$ 17
Maximum per incident, prior events	255
Maximum per incident, prior events, annually	38
Palo Verde (nuclear)
Commitments and Contingencies
Minimum federal requirement of nuclear property insurance	1,100
Federal loss limit, bodily injury and property damage from nuclear incident	16,300
Maximum per incident	79
Maximum per incident annual	12
San Onofre
Commitments and Contingencies
Minimum federal requirement of nuclear property insurance	50
Federal loss limit, bodily injury and property damage from nuclear incident	$ 560