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Capitalization (Tables) | 9 Months Ended
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Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Carrying Amounts and Fair Values of Long-Term Debt | The carrying amounts and fair values of long-term debt at September 30, 2025 and December 31, 2024 were:
(Millions of Dollars) | 2025 |  | 2024 |
Long-Term Debt (including current portion) (a) | Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value |
Con Edison (b) | $24,909 |  | $22,995 |  | $24,651 |  | $21,997 |
CECONY | $23,418 |  | $21,640 |  | $23,409 |  | $20,915 |
(a)Amounts shown are net of unamortized debt expense and unamortized debt discount of $241 million and $232 million for Con Edison and CECONY, respectively, as of September 30, 2025 and $249 million and $241 million for Con Edison and CECONY, respectively, as of December 31, 2024. (b)Amounts shown exclude $59 million of debt for Broken Bow II, a deferred project that was classified as held for sale as of December 31, 2024 and was sold and transferred in January 2025. The sale and transfer of Broken Bow II, including the related debt, was completed in January 2025. See Note Q.

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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