XML 94 R75.htm IDEA: XBRL DOCUMENT v3.22.0.1
Acquisitions and Dispositions (Acquisition of SCANA) (Narrative) (Detail) - USD ($)
shares in Millions, $ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2019
Oct. 31, 2017
Mar. 31, 2019
Dec. 31, 2021
Dec. 31, 2019
Dec. 31, 2020
Business Acquisition And Dispositions [Line Items]            
Stock issued during period for acquisition, value         $ 6,818  
Regulatory Liabilities       $ 11,699   $ 10,996
Regulatory liabilities-current       986   $ 809
SCANA            
Business Acquisition And Dispositions [Line Items]            
Stock issued during period for acquisition, shares 95.6       95.6  
Stock issued during period for acquisition, value $ 6,800       $ 6,800  
Common stock agreed to be issued, percentage 0.669%          
Total outstanding debt $ 6,900       6,707  
Business combination, refund to customers $ 2,000          
Period to provide refund to customer 20 years 20 years        
Regulatory Liabilities   $ 1,100        
Regulatory liabilities-current   67        
Refund Liability to electric service customers   1,000        
Remaining regulatory asset [1]         3,940  
Other Commitment, Fiscal Year Maturity [Abstract]            
Charitable contributions, annual committed increase for next five years       $ 1    
SCANA | Minimum            
Other Commitment, Fiscal Year Maturity [Abstract]            
Charitable contributions, period committed for annual increase 5 years          
SCANA | NND Project            
Business Acquisition And Dispositions [Line Items]            
Period to provide refund to customer 20 years          
Business combination cost related to exclusion from rate recovery $ 2,400          
Remaining regulatory asset 2,800          
Remaining regulatory asset current 138          
SCANA | Dominion Energy South Carolina Inc            
Business Acquisition And Dispositions [Line Items]            
Period to provide refund to customer     11 years      
Charge for refund of amounts from customers     $ 1,000      
Charge for refund of amounts from customers, current     $ 137      
After tax charge in statements of income         $ 756  
SCANA | Toshiba Corporation            
Business Acquisition And Dispositions [Line Items]            
Cash proceeds received   $ 1,100        
SCANA | Columbia Energy            
Business Acquisition And Dispositions [Line Items]            
Business combination cost related to exclusion from rate recovery $ 180          
[1] Includes $258 million of certain income tax-related regulatory assets associated with the NND Project for which Dominion Energy committed to forgo recovery in accordance with the SCANA Merger Approval Order. See Note 5 for additional information.