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Material Contingencies (Tables)
6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Total Guarantees
A summary, by type and term, of Con Edison's total guarantees under these agreements at June 30, 2025 is as follows:
 
Guarantee Type0 – 3 yearsTotal
(Millions of Dollars)
Con Edison Transmission$21$21
Total$21$21