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Fair Value Measurements - Schedule of Commodity Derivatives (Details) - Level 3 $ in Millions | Dec. 31, 2021 USD ($) $ / kW-month $ / MWh
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Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ (11)
CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | (7)
Electricity | Forward Energy Prices |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ (6)
Electricity | Forward Energy Prices | Minimum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | 18.75
Electricity | Forward Energy Prices | Maximum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | 82.40
Electricity | Forward Capacity Prices |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ (10)
Electricity | Forward Capacity Prices | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ (8)
Electricity | Forward Capacity Prices | Minimum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / kW-month | 0.31
Electricity | Forward Capacity Prices | Minimum | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / kW-month | 1.35
Electricity | Forward Capacity Prices | Maximum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / kW-month | 12.93
Electricity | Forward Capacity Prices | Maximum | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / kW-month | 12.93
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ 5
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Fair Value of commodity derivatives | $ 1
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves | Minimum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | (20.27)
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves | Minimum | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | 0.52
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves | Maximum |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | 83.04
Transmission Congestion Contracts | Inter-Zonal Forward Price Curves | Maximum | CECONY |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |
Unobservable Inputs Range (dollar per unit) | $ / MWh | 3.63

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