Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions	Sep. 30, 2025 USD ($)
Investment Holdings [Line Items]
Energy supply and hedging activities credit exposure total	$ 33
Makeup of net credit exposure with investment-grade counterparties	10
Makeup of net credit exposure with commodity exchange brokers	21
Subsidiaries
Investment Holdings [Line Items]
Makeup of net credit exposure with investment-grade counterparties	2
CECONY \| Subsidiaries
Investment Holdings [Line Items]
Energy supply and hedging activities credit exposure total	28
Makeup of net credit exposure with investment-grade counterparties	7
Makeup of net credit exposure with commodity exchange brokers	$ 21

Maximum Potential Future Exposure On Credit Risk Derivatives With Commodity Exchange Brokers

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- Definition

Maximum Potential Future Exposure On Credit Risk Derivatives With Investment Grade Counterparties

+ References

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- Definition

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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-Topic 815
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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

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