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Variable Interest Entities and Noncontrolling Interests (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 01, 2020
Nov. 06, 2019
Nov. 30, 2020
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
BHE            
Schedule of Equity Method Investments [Line Items]            
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock         $ 58 $ 58
Northern Electric Plc            
Schedule of Equity Method Investments [Line Items]            
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock         56 $ 56
PAC            
Schedule of Equity Method Investments [Line Items]            
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock         $ 2  
Cove Point LNG, LP | Dominion Energy, Inc.            
Schedule of Equity Method Investments [Line Items]            
Ownership interest   25.00% 50.00%   50.00%  
Cove Point LNG, LP | Brookfield Super-Core Infrastructure Partners            
Schedule of Equity Method Investments [Line Items]            
Ownership interest       25.00% 25.00%  
Northern Electric Plc | Northern Electric Plc            
Schedule of Equity Method Investments [Line Items]            
Ownership interest         8.061% 8.061%
Primary Beneficiary | Cove Point LNG, LP | Natural Gas Transmission and Storage | Other Ownership Interest            
Schedule of Equity Method Investments [Line Items]            
Variable interest entity, ownership percentage 25.00%       25.00%  
Primary Beneficiary | Cove Point LNG, LP | Natural Gas Transmission and Storage | General Partner            
Schedule of Equity Method Investments [Line Items]            
Variable interest entity, ownership percentage 100.00%       100.00%  
Primary Beneficiary | Cove Point LNG, LP | Natural Gas Transmission and Storage | Limited Partner            
Schedule of Equity Method Investments [Line Items]            
Variable interest entity, ownership percentage 25.00%       25.00%