Leases (Textual) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Operating leases expense		$ 57	$ 59
SCE
Lessee, Lease, Description [Line Items]
Lease income	$ 18
SCE | Minimum
Lessee, Lease, Description [Line Items]
Term of contract				15 years
SCE | Maximum
Lessee, Lease, Description [Line Items]
Term of contract	65 years
PPA Operating Leases
Lessee, Lease, Description [Line Items]
Net operating leases expense		2,300	2,300
Contingent operating lease expense		2,100	1,800
Contingent capital lease expense		$ 104	$ 99
PPA Operating Leases | SCE | Minimum
Lessee, Lease, Description [Line Items]
Lease term	10 years
PPA Operating Leases | SCE | Maximum
Lessee, Lease, Description [Line Items]
Lease term	20 years
Office Leases | SCE | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Office Leases | SCE | Maximum
Lessee, Lease, Description [Line Items]
Lease term	72 years
Other Operating Leases | SCE | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Other Operating Leases | SCE | Maximum
Lessee, Lease, Description [Line Items]
Lease term	12 years