Leases (Life) (Details) - SCE	Sep. 30, 2021
Power Purchase Agreements | Minimum
Lessee, Lease, Description [Line Items]
Lease term	3 years
Power Purchase Agreements | Maximum
Lessee, Lease, Description [Line Items]
Lease term	20 years
Office Leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Office Leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	72 years
Other Operating Leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Other Operating Leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	13 years