Investments in Affiliates - Summary of Transactions with Each of the Company's Other Investees (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
AC JV, LLC | Film rentals and advertising
Schedule Of Equity Method Investments [Line Items]
Event fees paid	[1]	$ 2.7	$ 7.1
Digital Cinema Distribution Coalition
Schedule Of Equity Method Investments [Line Items]
Content delivery fees paid	[1]	$ 0.1	$ 0.1

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