Investment in National CineMedia Inc. - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025		Mar. 31, 2024
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		$ 29.0
Screen rental revenue earned under ESA	[1]	0.0
Interest accrued related to significant financing component		0.0
Net gain (loss) on investment in NCMI		(3.5)	[2]	$ 4.4
Amortization of screen advertising advances		0.0
Ending Balance		25.5
N C M Screen Advertising Advances
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		(318.5)
Screen rental revenue earned under ESA	[1]	0.0
Interest accrued related to significant financing component		(5.4)
Net gain (loss) on investment in NCMI	[2]	0.0
Amortization of screen advertising advances		8.2
Ending Balance		(315.7)
Other Revenue
Schedule Of Equity Method Investments [Line Items]
Screen rental revenue earned under ESA	[1]	(4.8)
Interest accrued related to significant financing component		0.0
Net gain (loss) on investment in NCMI	[2]	0.0
Amortization of screen advertising advances		(8.2)
Ending Balance		(13.0)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Screen rental revenue earned under ESA	[1]	0.0
Interest accrued related to significant financing component		5.4
Net gain (loss) on investment in NCMI	[2]	0.0
Amortization of screen advertising advances		0.0
Ending Balance		5.4
Cash Received
Schedule Of Equity Method Investments [Line Items]
Screen rental revenue earned under ESA	[1],[3]	3.3
Interest accrued related to significant financing component	[3]	0.0
Net gain (loss) on investment in NCMI	[2],[3]	0.0
Amortization of screen advertising advances	[3]	0.0
Ending Balance	[3]	$ 3.3

[1] Amounts include the per patron and per digital screen theater access fees, net of amounts due to NCM for on-screen advertising time provided to the Company's beverage concessionaire of approximately $1.6.

[2] See Investment in National CineMedia below.

[3] The Company had a receivable from NCM of $1.5 as of March 31, 2025