XML 111 R95.htm IDEA: XBRL DOCUMENT
v3.22.1

Investments (Selected Information Regarding Equity and Fixed Income Securities) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Schedule of Available-for-sale Securities [Line Items] |  |  |
Proceeds from sales |  | $ 814 | $ 1,765
Realized gains | [1] | 40 | 232
Realized losses | [1] | 54 | 59
Virginia Electric and Power Company |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Proceeds from sales |  | 392 | 789
Realized gains | [1] | 16 | 106
Realized losses | [1] | $ 19 | $ 23
[1] | Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

X
- Definition Debt and equity securities realized gains. + References No definition available. + Details
Name: | d_DebtAndEquitySecuritiesRealizedGains
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt and equity securities realized losses. + References No definition available. + Details
Name: | d_DebtAndEquitySecuritiesRealizedLosses
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |