Leases (Textual) (Details) - Southern California Edison $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease income	$ 5
Minimum
Lessee, Lease, Description [Line Items]
Term of contract	15 years
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	65 years
PPA leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
PPA leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	20 years
Offices leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Offices 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	12 years