Other Investments- Summary of Transactions with Each of the Company's Other Investees (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Total revenue		$ 610.7	$ 460.5
AC JV, LLC | Film rentals and advertising
Schedule Of Equity Method Investments [Line Items]
Event fees paid	[1]	3.0	1.8
Digital Cinema Distribution Coalition
Schedule Of Equity Method Investments [Line Items]
Content delivery fees paid	[1]	$ 0.1	$ 0.2

[1] Included in film rentals and advertising costs on the condensed consolidated statements of loss.