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Related Party Transactions - MEC (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]      
Related party, cash received (paid) for income taxes $ 1,961 $ 1,441 $ 1,504
MEC | Affiliated entity      
Related Party Transaction [Line Items]      
Expense reimbursement 78 66 47
Receivables from affiliates 9 10  
Accounts payable to affiliates 22 17  
Affiliated notes receivable 79 124  
Due to affiliate, noncurrent 40 63  
MEC | BHE      
Related Party Transaction [Line Items]      
Related party expense 79 72 15
Income tax receivable (payable), related parties current 42 79  
Related party, cash received (paid) for income taxes 840 746 709
MEC | Northern Natural Gas and BNSF Railway Company      
Related Party Transaction [Line Items]      
Purchases from related party 141 $ 132 $ 129
MEC | BHE Renewables      
Related Party Transaction [Line Items]      
Purchases from related party $ 7