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Income Taxes - BHE (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 01, 2023
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Federal statutory income tax rate   21.00% 21.00% 21.00% 21.00%
Income tax credits   (13.00%) (20.00%) (27.00%) (28.00%)
State income tax, net of federal income tax impacts   4.00% 2.00% 2.00% 1.00%
Income tax effect of foreign income   3.00% (2.00%) 3.00% (2.00%)
Effects of ratemaking   (2.00%) (1.00%) (4.00%) (3.00%)
Equity income   0.00% (1.00%) (2.00%) (1.00%)
Noncontrolling interest   (1.00%) 0.00% (2.00%) 0.00%
Other   0.00% 0.00% 1.00% 0.00%
Effective income tax rate   12.00% (1.00%) (8.00%) (12.00%)
Years eligible for federal renewable energy production tax credit       10 years  
Production tax credits       $ 678 $ 454
United Kingdom          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Income tax effect, change in enacted tax rate       $ 109  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent       19.00%  
United Kingdom | Subsequent Event | Forecast          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 25.00%        
Parent Company          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Related party transaction, cash paid for (received) income taxes       $ (943) $ (100)