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Income Taxes - BHE (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 01, 2023
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
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%) (13.00%) (28.00%) (27.00%)
State income tax, net of federal income tax impacts   (1.00%) 4.00% 0.00% 2.00%
Income tax effect of foreign income   0.00% 3.00% (1.00%) 3.00%
Effects of ratemaking   (1.00%) (2.00%) (2.00%) (4.00%)
Equity income   (1.00%) 0.00% (1.00%) (2.00%)
Noncontrolling interest   (1.00%) (1.00%) (2.00%) (2.00%)
Other   1.00% 0.00% 0.00% 1.00%
Effective income tax rate   5.00% 12.00% (13.00%) (8.00%)
Years eligible for federal renewable energy production tax credit       10 years  
Production tax credits       $ 734 $ 678
United Kingdom          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Income tax effect, change in enacted tax rate         $ 109
Income tax effect, change in enacted tax rate, percentage         19.00%
United Kingdom | Subsequent Event          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Income tax effect, change in enacted tax rate, percentage 25.00%        
Parent Company          
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Related party transaction, cash received (paid) for income taxes       $ 1,249 $ 943