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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2025
Related Party Transactions [Abstract]  
Schedule of Costs of Administrative and Other Services Provided and Received
The costs of administrative and other services provided by CECONY to, and received by it from, Con Edison and its other subsidiaries for the years ended December 31, 2025, 2024 and 2023 were as follows:
CECONY (a)
(Millions of Dollars)202520242023
Cost of services provided$163$147$146
Cost of services received858282
(a) On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note W and Note X.