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Commitments and Contingencies – Hydroelectric (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Hydroelectric [Line Items]    
Operating Leases, Rent Expense   $ 156,000,000
PacifiCorp [Member]    
Hydroelectric [Line Items]    
Capital expenditures required by hydroelectric licenses $ 168,000,000  
PacifiCorp [Member] | Klamath Hydroelectric System [Member]    
Hydroelectric [Line Items]    
Dam removal cost limit 200,000,000  
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA    
Hydroelectric [Line Items]    
Dam removal cost limit 16,000,000  
Additional dam removal costs, California bond measure 250,000,000  
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | VARIOUS [Domain]    
Hydroelectric [Line Items]    
Klamath Relicensing and Settlement Costs 29,000,000  
PacifiCorp [Member]    
Hydroelectric [Line Items]    
Capital expenditures required by hydroelectric licenses 168,000,000  
PacifiCorp [Member] | Klamath Hydroelectric System [Member]    
Hydroelectric [Line Items]    
Public Utilities Property Plant & Equipment, Number of Generating Facilities 4  
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA    
Hydroelectric [Line Items]    
Dam removal cost limit $ 16,000,000