XML 180 R130.htm IDEA: XBRL DOCUMENT v3.22.4
Business Acquisitions and Dispositions - EEGH (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jul. 31, 2021
Nov. 30, 2020
Jul. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]            
Distribution of net assets           $ 699
Contributions       $ 5 $ 9  
Noncontrolling Interest            
Business Acquisition [Line Items]            
Contributions       5 9  
EEGH            
Business Acquisition [Line Items]            
Contributions       $ 98 $ 419 $ 1,223
EEGH | Cove Point LNG, LP            
Business Acquisition [Line Items]            
Noncontrolling interest distributed     25.00%      
EEGH | GT&S Transaction | Disposed of by means other than sale | Cove Point LNG, LP            
Business Acquisition [Line Items]            
Noncontrolling interest distributed 50.00%          
EEGH | Dominion Energy Questar Pipeline | Disposed of by means other than sale            
Business Acquisition [Line Items]            
Distribution of net assets   $ 699        
Distribution of net assets of subsidiary to affiliate   41        
Contributions   1,300        
EEGH | Dominion Energy Questar Pipeline | Disposed of by means other than sale | Goodwill            
Business Acquisition [Line Items]            
Distribution of net assets   185        
EEGH | Dominion Energy Questar Pipeline | Disposed of by means other than sale | Pension plan asset            
Business Acquisition [Line Items]            
Distribution of net assets   895        
EEGH | Dominion Energy Questar Pipeline | Disposed of by means other than sale | Affiliated Balances            
Business Acquisition [Line Items]            
Distribution of net assets   107        
EEGH | Cove Point LNG, LP | Noncontrolling Interest            
Business Acquisition [Line Items]            
Increase in noncontrolling interest   $ 2,800        
EEGH | Cove Point LNG, LP | GT&S Transaction | Disposed of by means other than sale            
Business Acquisition [Line Items]            
Noncontrolling interest distributed 50.00%          
Dominion Energy, Inc. | Cove Point LNG, LP            
Business Acquisition [Line Items]            
Retained interest after disposal   50.00%