XML 66 R51.htm IDEA: XBRL DOCUMENT
v3.21.1

Regulatory Matters - COVID-19 Regulatory Matters (Details) - COVID-19 - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2021
Public Utilities, General Disclosures [Line Items] |  |  |  |
Deferred costs |  | $ 0.6 |  |
CECONY |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Estimated forgone revenues |  | 17.0 |  |
CECONY | Electric and Gas Transmission Projects |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Reserve adjustments |  | 106.0 |  |
Write off |  | 18.0 |  |
O&R |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Estimated forgone revenues |  | $ 1.0 |  |
Late payment charges and fees |  |  | $ 52.0 |
Late payment charges and fees, surcharge recovery period |  | 12 months |  |
O&R | Gas |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Reserve adjustments |  | $ 4.0 |  |
Write off |  | $ 2.0 |  |
Residential Customers | CECONY |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Deferred revenue |  |  | $ 54.9 |
Summer Cooling Credit Program | Residential Customers | CECONY |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Expected deferred revenue |  |  |  | $ 63.4
Cost of the program, recovery period | 5 years |  |  |

X
- Definition Contract With Customer, Cost Of Program, Recovery Period + References No definition available. + Details
Name: | ed_ContractWithCustomerCostOfProgramRecoveryPeriod
Namespace Prefix: | ed_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contract With Customer, Receivable, Expected Amount + References No definition available. + Details
Name: | ed_ContractWithCustomerReceivableExpectedAmount
Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Revenue From Contract With Customer, Estimated Forgone Revenues + References No definition available. + Details
Name: | ed_RevenueFromContractWithCustomerEstimatedForgoneRevenues
Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue From Contract With Customer, Late Payment Charges And Fees, Surcharge Recovery Period + References No definition available. + Details
Name: | ed_RevenueFromContractWithCustomerLatePaymentChargesAndFeesSurchargeRecoveryPeriod
Namespace Prefix: | ed_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue From Contracts With Customer, Late Payment Charges And Fees + References No definition available. + Details
Name: | ed_RevenueFromContractsWithCustomerLatePaymentChargesAndFees
Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer, when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
Name: | us-gaap_ContractWithCustomerAssetGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of deferred costs. + References No definition available. + Details
Name: | us-gaap_DeferredCostsCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=ed_COVID19Member
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=ed_ElectricAndGasTransmissionProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ed_OrangeAndRocklandUtilitiesIncMember
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: |

X
- Details
Name: | srt_MajorCustomersAxis=ed_ResidentialCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ed_ProgramAxis=ed_SummerCoolingCreditProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |