Leases (Textual) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
SCE
Lessee, Lease, Description [Line Items]
Lease income	$ 17	$ 18
SCE | Maximum
Lessee, Lease, Description [Line Items]
Term of contract	65 years
SCE | PPA Operating Leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	3 years
SCE | PPA Operating Leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	20 years
SCE | Office Leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
SCE | Office Leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	72 years
SCE | Other Operating Leases | Minimum
Lessee, Lease, Description [Line Items]
Lease term	5 years
Term of contract	15 years
SCE | Other Operating Leases | Maximum
Lessee, Lease, Description [Line Items]
Lease term	13 years
EME | Affiliated Entity
Lessee, Lease, Description [Line Items]
Net proceeds	$ 132