XML 77 R62.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Regulatory Matters - Schedule of Regulatory Assets Not Earning a Return (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | $ 2,313 | $ 2,347
Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 2,164 | 2,209
Environmental remediation costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 1,100 | 1,105
Environmental remediation costs | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 1,017 | 1,022
Revenue taxes |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 514 | 490
Revenue taxes | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 493 | 470
COVID-19 deferral for uncollectible accounts receivable |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 365 | 291
COVID-19 deferral for uncollectible accounts receivable | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 354 | 288
Deferred derivative losses - short term |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 147 | 269
Deferred derivative losses - short term | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 136 | 253
Deferred derivative losses - long term |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 115 | 163
Deferred derivative losses - long term | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 104 | 148
Unrecognized pension and other postretirement costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 7 | 0
Unrecognized pension and other postretirement costs | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 7 | 0
Other |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | 65 | 29
Other | Subsidiaries | CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets not earning return | $ 53 | $ 28

X
- Definition Regulatory Assets Not Earning Return + References No definition available. + Details
Name: | ed_RegulatoryAssetsNotEarningReturn
Namespace Prefix: | ed_
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_RegulatoryAssetLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_EnvironmentalRestorationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_RevenueTaxesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_COVID19DeferralForUncollectibleAccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_DerivativeLossesCurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_DerivativeLossesLongTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_UnrecognizedPensionAndOtherPostretirementCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ed_OtherRegulatoryAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |