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Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions | Jun. 30, 2023 USD ($)
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Investment Holdings [Line Items] |
Energy supply and hedging activities credit exposure total | $ 94
Makeup of net credit exposure with investment-grade counterparties | 43
Makeup of net credit exposure with commodity exchange brokers | 25
Makeup of net credit exposure with non-investment grade/non-rated counterparties | 26
CECONY | Subsidiaries |
Investment Holdings [Line Items] |
Energy supply and hedging activities credit exposure total | 86
Makeup of net credit exposure with investment-grade counterparties | 36
Makeup of net credit exposure with commodity exchange brokers | 24
Makeup of net credit exposure with non-investment grade/non-rated counterparties | $ 26

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