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Material Contingencies (Tables)
12 Months Ended
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Total Guarantees
A summary, by type and term, of Con Edison’s total guarantees under these other agreements at December 31, 2025 is as follows:
Guarantee Type0 – 3 years> 10 yearsTotal
 (Millions of Dollars)
Con Edison Transmission$60$—$60
Total$60$—$60