Investment in National CineMedia Inc. - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024		Jun. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Impairment of long-lived and other assets		$ 0.0	$ 9.4		$ 0.0		$ 10.1
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Beginning Balance					18.1
Screen rental revenue earned under ESA	[1]				0.0
Interest accrued related to significant financing component					0.0
Receipt of common units due to annual common unit adjustment	[2]				0.0
Net (loss) gain on investment in NCMI		3.3	$ 9.2	$ 0.0	1.1	[3]	$ 9.2
Amortization of screen advertising advances					0.0
Ending Balance		19.2			19.2
N C M Screen Advertising Advances
Schedule Of Equity Method Investments [Line Items]
Beginning Balance					(328.4)
Screen rental revenue earned under ESA	[1]				0.0
Interest accrued related to significant financing component					(11.1)
Receipt of common units due to annual common unit adjustment	[2]				(0.5)
Net (loss) gain on investment in NCMI	[3]				0.0
Amortization of screen advertising advances					16.2
Ending Balance		(323.8)			(323.8)
Other Revenue
Schedule Of Equity Method Investments [Line Items]
Beginning Balance					0.0
Screen rental revenue earned under ESA	[1]				(10.4)
Interest accrued related to significant financing component					0.0
Receipt of common units due to annual common unit adjustment	[2]				0.0
Net (loss) gain on investment in NCMI	[3]				0.0
Amortization of screen advertising advances					(16.2)
Ending Balance		(26.6)			(26.6)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance					0.0
Screen rental revenue earned under ESA	[1]				0.0
Interest accrued related to significant financing component					11.1
Receipt of common units due to annual common unit adjustment	[2]				0.0
Net (loss) gain on investment in NCMI	[3]				0.0
Amortization of screen advertising advances					0.0
Ending Balance		11.1			11.1
Cash Received
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[4]				0.0
Screen rental revenue earned under ESA	[1],[4]				8.2
Interest accrued related to significant financing component	[4]				0.0
Receipt of common units due to annual common unit adjustment	[2],[4]				0.0
Net (loss) gain on investment in NCMI	[3],[4]				0.0
Amortization of screen advertising advances	[4]				0.0
Ending Balance	[4]	$ 8.2			$ 8.2

[1] Amounts include the per patron and per digital screen theatre access fees, net of amounts due to NCM for on-screen advertising time provided to the Company's beverage concessionaire of approximately $3.7.

[2] See Common Unit Adjustments below.

[3] See Investment in National CineMedia below.

[4] The Company had a receivable from NCM of $2.2 as of June 30, 2024