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Leases (Tables)
 3 Months Ended
Mar. 31, 2026
Leases [Abstract]  
Schedule of Lease Costs, Cash Flows and Other Related Information
Operating lease cost and cash paid for amounts included in the measurement of lease liabilities for the three months ended March 31, 2026 and 2025 were as follows:
For the Three Months Ended March 31,
Con Edison (a)CECONY
(Millions of Dollars)2026202520262025
Operating lease cost$18$17$18$17
Operating lease cash flows$5$4$5$4