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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]  
Summary 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, 2023, 2022 and 2021 were as follows:
CECONY (a)
(Millions of Dollars)202320222021
Cost of services provided$146$135$137
Cost of services received827568
(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.