Investments in Affiliates - Summary of Transactions with Each of the Company's Other Investees (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AC JV, LLC | Film rentals and advertising
Schedule Of Equity Method Investments [Line Items]
Event fees paid	[1]	$ 4.4	$ 2.7	$ 7.4	$ 4.5
Digital Cinema Distribution Coalition
Schedule Of Equity Method Investments [Line Items]
Content delivery fees paid	[1]	$ 0.2	$ 0.1	$ 0.3	$ 0.3

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