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Income Taxes - PAC (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]    
Federal statutory income tax rate 21.00% 21.00%
State income tax, net of federal income tax benefit (21.00%) 0.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent 136.00% (46.00%)
Effects of ratemaking 10.00% (8.00%)
Other, net 1.00% (1.00%)
Effective income tax rate (217.00%) 36.00%
Production Tax Credit Carryforwards [Abstract]    
Years eligible for federal renewable energy production tax credit 10 years  
PacifiCorp [Member]    
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]    
Federal statutory income tax rate 21.00% 21.00%
State income tax, net of federal income tax benefit 3.00% 3.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent (20.00%) (11.00%)
Effects of ratemaking (13.00%) (22.00%)
Other, net 2.00% 0.00%
Effective income tax rate (7.00%) (9.00%)
Effective income tax reconciliation, Amortization of excess deferred income taxes, Dollar $ 3 $ 30
Production Tax Credit Carryforwards [Abstract]    
Years eligible for federal renewable energy production tax credit 10 years  
BHE [Member] | PacifiCorp [Member]    
Related Party Income Tax Receivable (Payable) [Abstract]    
Related party transaction, cash paid for income taxes, net $ 1 $ 26