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Income Taxes - BHE (Details) - USD ($)
1 Months Ended 3 Months Ended
Mar. 31, 2023
Jul. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Schedule of Effective Income Tax Rate Reconciliation [Line Items]        
Effective income tax rate     (17.00%) 108.00%
Income tax expense (benefit)     $ 162,000,000 $ 507,000,000
Pre-tax loss     (979,000,000) 470,000,000
Pre-tax unrealized loss on investment     $ (529,000,000) 1,257,000,000
Federal statutory income tax rate, benefit       $ 99,000,000
Federal statutory income tax rate     21.00% 21.00%
Income tax credit benefit       $ 339,000,000
Income tax credits     (35.00%) 72.00%
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Federal statutory income tax rate     21.00% 21.00%
Income tax credits     (35.00%) 72.00%
State income tax, net of federal income tax impacts     (4.00%) (3.00%)
Income tax effect of foreign income     7.00% 3.00%
Effects of ratemaking     (3.00%) 8.00%
Equity income     (1.00%) 3.00%
Noncontrolling interest     (2.00%) 5.00%
Other     0.00% (1.00%)
Effective income tax rate     (17.00%) 108.00%
Years eligible for federal renewable energy production tax credit     10 years  
Production tax credits     $ 343,000,000 $ 338,000,000
Related party transaction, cash received (paid) for income taxes     $ 0 0
Long-term Income Tax Receivable        
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Long-term income tax receivable adjustments   $ (744,000,000)    
Retained Earnings        
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Long-term income tax receivable adjustments   $ 744,000,000    
BYD Company Limited common stock        
Schedule of Effective Income Tax Rate Reconciliation [Line Items]        
Pre-tax unrealized loss on investment       $ 1,247,000,000
United Kingdom        
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
Income tax effect, change in enacted tax rate, Energy Profit Levy $ 82,000,000