XML 103 R86.htm IDEA: XBRL DOCUMENT v3.20.2
Derivatives and Hedge Accounting Activities (Selected Information Related to Gains (Losses) on Cash Flow Hedges Included in AOCI) (Detail)
$ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (644)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (57)
Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax (78)
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 (168)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (15)
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 18 months
Commodity | Natural Gas Liquids  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ 0
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 0
Maximum Term 6 months
Commodity | Electricity  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ 8
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 8
Maximum Term 6 months
Interest rate  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (640)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (59)
Maximum Term 378 months
Interest rate | Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (78)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (1)
Maximum Term 378 months
Interest rate | Dominion Energy Gas Holdings, LLC  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (158)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (11)
Maximum Term 294 months
Foreign currency  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (10)
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (4)
Maximum Term 72 months
Foreign currency | Dominion Energy Gas Holdings, LLC  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (10)
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (4)
Maximum Term 72 months