XML 85 R83.htm IDEA: XBRL DOCUMENT v3.20.1
Derivatives and Hedge Accounting Activities (Selected Information Related to Gains (Losses) on Cash Flow Hedges Included in AOCI) (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (651)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (38)
Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax (79)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (1)
Dominion Energy Gas Holdings, LLC  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax (166)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (12)
Commodity | Natural Gas  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax (2)
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (2)
Maximum Term 21 months
Commodity | Natural Gas Liquids  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ 1
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 1
Maximum Term 9 months
Commodity | Electricity  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ 14
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 14
Maximum Term 9 months
Interest rate  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (655)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (50)
Maximum Term 381 months
Interest rate | Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (79)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (1)
Maximum Term 381 months
Interest rate | Dominion Energy Gas Holdings, LLC  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (157)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (11)
Maximum Term 297 months
Foreign currency  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (9)
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (1)
Maximum Term 75 months
Foreign currency | Dominion Energy Gas Holdings, LLC  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (9)
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (1)
Maximum Term 75 months