INVESTMENT IN NATIONAL CINEMEDIA, INC / NATIONAL CINEMEDIA LLC - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Impairment of long-lived and other assets		$ (1.5)		$ (16.6)		$ (174.1)
Investment In NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		18.1		9.6		135.4
Receipt of common units due to annual common unit adjustment		0.0	[1]			(1.3)
Equity in (loss) income of subsidiaries, net of taxes				(3.2)	[2]	(13.9)
Impairment of long-lived and other assets	[3],[4]			(0.7)		(113.2)
Unrealized Gain (Loss) on Investments	[4]	10.9		12.4
Ending Balance		29.0		18.1		9.6
Investment in NCMI [Member]
Schedule Of Equity Method Investments [Line Items]
Unrealized Gain (Loss) on Investments		10.9		12.4
NCM Screen Advertising Advances
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		(328.4)		(338.2)		(346.0)
Receipt of common units due to annual common unit adjustment		(0.5)	[1]			1.3
Interest accrued on NCM screen advertising advances		(22.0)		(22.6)		(23.2)
Amortization of screen advertising advances		32.4		32.4		32.3
Ending Balance		(318.5)		(328.4)		(338.2)
Equity in Loss
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[2]	3.2		13.9
Equity in (loss) income of subsidiaries, net of taxes	[2]			3.2		13.9
Ending Balance	[2]			3.2		13.9
Other Revenue
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		(53.3)		(52.2)
Screen rental revenues earned under ESA	[5]	(21.9)		(20.9)		(19.9)
Amortization of screen advertising advances		(32.4)		(32.4)		(32.3)
Ending Balance		(54.3)		(53.3)		(52.2)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		22.6		23.2
Interest accrued on NCM screen advertising advances		22.0		22.6		23.2
Ending Balance		22.0		22.6		23.2
Cash Received
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[5]	20.9		19.9
Screen rental revenues earned under ESA	[5]	21.9		20.9		19.9
Unrealized Gain (Loss) on Investments	[4],[5]	0.0
Ending Balance		$ 21.9		$ 20.9	[5]	$ 19.9	[5]

[1] See Common Unit Adjustments below

[2] Equity in loss was recorded through April 11, 2023, the date NCM filed its bankruptcy petition, after which the Company applied the fair value accounting method as discussed below

[3] Reflected in impairment of long-lived and other assets on the consolidated income statement for the year indicated. See further discussion at Investment in National CineMedia below.

[4] See Investment in National CineMedia below.

[5] 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. The amounts due to NCM for on-screen advertising time provided to the Company’s beverage concessionaire were approximately $7.5, $8.9 and $8.6 for the years ended December 31, 2022, 2023 and 2024, respectively. The portion of these amounts that were unpaid and reflected in accounts receivable as of December 31, 2023 and 2024 were $4.9 and $2.1, respectively