XML 184 R156.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Mar. 01, 2023
--- | --- | ---
Investment Holdings [Line Items] |  |
Energy supply and hedging activities credit exposure total | $ 29 |
Makeup of net credit exposure with investment-grade counterparties | 22 |
Makeup of net credit exposure with commodity exchange brokers | 7 |
CECONY |  |
Investment Holdings [Line Items] |  |
Energy supply and hedging activities credit exposure total | $ 21 |
Makeup of net credit exposure with investment-grade counterparties |  | $ 15
Makeup of net credit exposure with commodity exchange brokers |  | $ 6

X
- Definition Maximum Potential Future Exposure On Credit Risk Derivatives With Commodity Exchange Brokers + References No definition available. + Details
Name: | ed_MaximumPotentialFutureExposureOnCreditRiskDerivativesWithCommodityExchangeBrokers
Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum Potential Future Exposure On Credit Risk Derivatives With Investment Grade Counterparties + References No definition available. + Details
Name: | ed_MaximumPotentialFutureExposureOnCreditRiskDerivativesWithInvestmentGradeCounterparties
Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K + Details
Name: | us-gaap_CreditDerivativeMaximumExposureUndiscounted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_CreditDerivativesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=ed_ConsolidatedEdisonCompanyofNewYorkInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |