XML 168 R139.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Derivative Instruments and Hedging Activities - Hedged Volume of Derivative Transactions (Details) | Dec. 31, 2021 MWh MW MMBTU gal
--- | ---
Electric Energy |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 26,982,370
Capacity |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 42,333
Natural Gas |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 253,195,063
Refined Fuels |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 3,696,000
CECONY | Electric Energy |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 24,646,000
CECONY | Capacity |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 28,800
CECONY | Natural Gas |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 235,570,000
CECONY | Refined Fuels |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 3,696,000

X
- Definition Nominal number of units used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123477628&loc=d3e90205-114008 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ed_RefinedFuelsMember
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: |