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Material Contingencies (Tables)
9 Months Ended
Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]  
Summary of Total Guarantees
A summary, by type and term, of Con Edison's total guarantees under these agreements at September 30, 2024 is as follows:
 
Guarantee Type0 – 3 years> 10 yearsTotal
(Millions of Dollars)
Con Edison Transmission$54$—$54
Broken Bow II99
Total$54$9$63