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Derivative Instruments and Hedging Activities - Hedged Volume of Derivative Transactions (Details) | Sep. 30, 2020 MWh MMBTU MW gal
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Electric Energy |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 30,693,295
Capacity |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 41,993
Natural Gas |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 304,371,409
Refined Fuels |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 8,736,000
CECONY | Electric Energy |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 28,628,075
CECONY | Capacity |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 32,400
CECONY | Natural Gas |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 288,330,000
CECONY | Refined Fuels |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 8,736,000

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- Definition Nominal number of units used to calculate payment on derivative. + References Reference 1: 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=109980867&loc=SL5580258-113959 Reference 2: 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=109980867&loc=SL5579245-113959 + Details
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