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Derivative Instruments and Hedging Activities - Hedged Volume of Derivative Transactions (Details) | Sep. 30, 2025 MWh MW gal MMBTU
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Electric Energy (MWh) |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 31,734,340
Capacity (MW) |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 25,200
Natural Gas (Dt) |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 340,270,000
Refined Fuels (gallons) |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 3,528,000
CECONY | Electric Energy (MWh) | Subsidiaries |
Derivatives, Fair Value [Line Items] |
Notional amount | MWh | 29,204,950
CECONY | Capacity (MW) | Subsidiaries |
Derivatives, Fair Value [Line Items] |
Notional amount | MW | 14,100
CECONY | Natural Gas (Dt) | Subsidiaries |
Derivatives, Fair Value [Line Items] |
Notional amount | MMBTU | 319,960,000
CECONY | Refined Fuels (gallons) | Subsidiaries |
Derivatives, Fair Value [Line Items] |
Notional amount | gal | 3,528,000

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