v3.26.3
Investments in Affiliates - Summary of Transactions with Each of the Company's Other Investees (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AC JV, LLC | Location, Statement of Income, Balance [Axis]: cnk:FilmRentalsAndAdvertising        
Schedule Of Equity Method Investments [Line Items]        
Event fees paid [1] $ 7.0 $ 3.1 $ 13.0 $ 14.8
Digital Cinema Distribution Coalition        
Schedule Of Equity Method Investments [Line Items]        
Content delivery fees paid [1] $ 0.1 $ 0.1 $ 0.4 $ 0.4
[1] Included in film rentals and advertising costs on the condensed consolidated statements of income.