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Leases (Textual) (Details) - Southern California Edison
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Lessee, Lease, Description [Line Items]    
Lease income $ 5 $ 10
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
Offices leases | Minimum    
Lessee, Lease, Description [Line Items]    
Lease term 5 years 5 years
Offices 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