Leases (Textual) (Details) - Southern California Edison $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease income	$ 4	$ 14
Minimum
Lessee, Lease, Description [Line Items]
Term of contract	15 years	15 years
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	65 years	65 years
PPA leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	10 years	10 years
PPA leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	20 years	20 years
Office leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years	5 years
Office leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	72 years	72 years
Other operating leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years	5 years
Other operating leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	12 years	12 years