XML 74 R59.htm IDEA: XBRL DOCUMENT
v3.24.3

Regulatory Matters - Rate Plans and Bill Relief Narrative (Details) - USD ($) $ in Millions | 1 Months Ended
--- | ---
May 31, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Jan. 31, 2024
O&R |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Bill relief program, amount received |  |  | $ 9.0 |
CECONY |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Bill relief program, amount received |  |  | $ 91.0 |
Electric | O&R |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount | $ (27.6) | $ 10.7 |  | $ 7.5
Return on common equity (as a percent) | 950.00% | 10.25% |  |
Common equity ratio (percent) | 4800.00% | 5000.00% |  |
Electric | O&R | Year 2 |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount |  | $ 34.8 |  |
Electric | O&R | Year 3 |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount |  | 55.0 |  |
Gas | O&R |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount | $ (2.9) | $ 17.5 |  | $ 3.1
Return on common equity (as a percent) | 950.00% | 10.25% |  |
Common equity ratio (percent) | 4800.00% | 5000.00% |  |
Gas | O&R | Year 2 |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount |  | $ 22.8 |  |
Gas | O&R | Year 3 |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested rate increase (decrease), amount |  | $ 19.2 |  |

X
- Definition Common Equity Ratio, Percentage + References No definition available. + Details
Name: | ed_CommonEquityRatioPercentage
Namespace Prefix: | ed_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of regulatory assistance received from a federal regulatory agency in conjunction with either an acquisition of a troubled financial institution, transfer of nonperforming assets to a newly-formed entity, or other reorganization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 11.N) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480035/942-10-S99-5 + Details
Name: | us-gaap_AmountOfRegulatoryAssistanceReceived1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=ed_OrangeAndRocklandUtilitiesIncMember
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_PublicUtilityAxis=us-gaap_ElectricTransmissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_RatePlanforYear2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_RatePlanforYear3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=us-gaap_GasTransmissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |