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Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity Contract [Member] - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]        
Derivative, fair value, net $ (17) $ (63)    
Cash collateral receivable 24 47    
Derivative Assets (Liabilities), at Fair Value, Net 7 (16)    
Other Current Assets [Member]        
Derivatives, Fair Value [Line Items]        
Derivative, fair value, net 27 12    
Cash collateral receivable 0 0    
Derivative Assets (Liabilities), at Fair Value, Net 27 12    
Other Noncurrent Assets [Member]        
Derivatives, Fair Value [Line Items]        
Derivative, fair value, net 6 2    
Cash collateral receivable 0 0    
Derivative Assets (Liabilities), at Fair Value, Net 6 2    
Other Current Liabilities [Member]        
Derivatives, Fair Value [Line Items]        
Derivative, fair value, net (22) (27)    
Cash collateral receivable 15 20    
Derivative Assets (Liabilities), at Fair Value, Net (7) (7)    
Other Noncurrent Liabilities [Member]        
Derivatives, Fair Value [Line Items]        
Derivative, fair value, net (28) (50)    
Cash collateral receivable 9 27    
Derivative Assets (Liabilities), at Fair Value, Net (19) (23)    
Not Designated as Hedging Instrument [Member]        
Derivatives, Fair Value [Line Items]        
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 36 21    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement (53) (84)    
Derivative, fair value, net (17) (63)    
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts 17 62 $ 96 $ 101
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]        
Derivatives, Fair Value [Line Items]        
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 29 15    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement (2) (3)    
Derivative, fair value, net 27 12    
Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]        
Derivatives, Fair Value [Line Items]        
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 6 2    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 0 0    
Derivative, fair value, net 6 2    
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]        
Derivatives, Fair Value [Line Items]        
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 1 4    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement (23) (31)    
Derivative, fair value, net (22) (27)    
Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]        
Derivatives, Fair Value [Line Items]        
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 0 0    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement (28) (50)    
Derivative, fair value, net $ (28) $ (50)