XML 86 R73.htm IDEA: XBRL DOCUMENT
v3.23.1

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Liabilities) (Detail) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | $ 889 | $ 1,404
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 353 | 435
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 116 | 396
Net Amounts |  | 420 | 573
Virginia Electric and Power Company |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 268 | 430
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 81 | 45
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 18 | 247
Net Amounts |  | 169 | 138
Commodity Contract | Over-the-counter |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 219 | 443
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 100 | 34
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 0 | 71
Net Amounts |  | 119 | 338
Commodity Contract | Over-the-counter | Virginia Electric and Power Company |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 82 | 146
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 66 | 13
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 0 | 71
Net Amounts |  | 16 | 62
Commodity Contract | Exchange |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 174 | 483
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 59 | 159
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 115 | 324
Net Amounts |  | 0 | 0
Commodity Contract | Exchange | Virginia Electric and Power Company |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 31 | 176
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 13 | 0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 18 | 176
Net Amounts |  | 0 | 0
Interest Rate Contract | Over-the-counter |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 403 | 377
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 193 | 210
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 1 | 1
Net Amounts |  | 209 | 166
Interest Rate Contract | Over-the-counter | Virginia Electric and Power Company |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 62 | 7
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 1 | 0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 0 | 0
Net Amounts |  | 61 | 7
Foreign currency exchange rate | Over-the-counter |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 93 | 101
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 1 | 32
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 0 | 0
Net Amounts |  | 92 | 69
Foreign currency exchange rate | Over-the-counter | Virginia Electric and Power Company |  |  |
Offsetting Liabilities [Line Items] |  |  |
Gross Liabilities Presented in the Consolidated Balance Sheet | [1] | 93 | 101
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments |  | 1 | 32
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral |  | 0 | 0
Net Amounts |  | $ 92 | $ 69
[1] | Excludes derivative liabilities of $68 million and $26 million at Virginia Power at March 31, 2023 and December 31, 2022, respectively, which are not subject to master netting or similar arrangements. Dominion Energy did not have any derivative liabilities at March 31, 2023 and December 31, 2022 which were not subject to master netting or similar arrangements.

X
- Definition Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226038-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeCollateralRightToReclaimCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value, after effects of master netting arrangements, deduction of liabilities not subject to a master netting arrangement and elected not to be offset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, offset against the right to receive collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 + Details
Name: | us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset, subject to master netting arrangement or similar agreement and not elected or qualified to offset, deducted from derivative liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(1)(i) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(1)(ii) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 + Details
Name: | us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_OffsettingLiabilitiesLineItems
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: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TransactionTypeAxis=us-gaap_OverTheCounterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TransactionTypeAxis=us-gaap_ExchangeTradedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |