Investments in National CineMedia Inc. and Other Affiliates - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Schedule Of Equity Method Investments [Line Items]
Estimated fair value of additional common units received			$ 0.0	$ 0.5
NCM
Schedule Of Equity Method Investments [Line Items]
Amounts Recognized As Accounts Receivable			2.2		$ 2.1
Recognized incremental screen rental revenue and offsetting interest expense			10.7	11.1
Amortization of screen advertising advances			16.3	16.2
Company's beverage concessionaire advertising costs			4.2	3.7
Investment In NCM | NCM
Schedule Of Equity Method Investments [Line Items]
Amortization of screen advertising advances			10.5	10.4
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Unrealized gain (loss)	$ 4.3	$ (3.3)	(7.8)	$ 1.1
Amortization of screen advertising advances			$ 0.0