XML 132 R111.htm IDEA: XBRL DOCUMENT v3.25.0.1
Derivatives and Hedge Accounting Activities (Selected Information Related to Gains (Losses) on Cash Flow Hedges Included in AOCI) (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ (171)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (29)
Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax 28
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax 1
Interest Rate Contract  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax (171)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (29)
Maximum Term 384 months
Interest Rate Contract | Virginia Electric and Power Company  
Derivative Instruments Gain Loss [Line Items]  
AOCI After-Tax $ 28
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 1
Maximum Term 384 months