INVESTMENT IN NATIONAL CINEMEDIA, INC / NATIONAL CINEMEDIA LLC - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions					12 Months Ended
		Apr. 15, 2024	Apr. 01, 2024	Feb. 17, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 03, 2023	Jan. 01, 2023	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Number of additional common units of NCM received under common unit adjustment agreement			0.1
Value of common units received from NCM			$ 0.5		$ 0.5	$ 0.0	$ 1.3
Impairment of long-lived and other assets					(1.5)	(16.6)	(174.1)
Noncontrolling interests					9.0	9.0
Investment In Ncm [Member]
Schedule Of Equity Method Investments [Line Items]
Common Share Units in Ncm in Exchange				43.7
Common unit redemption		$ 4.95
Unrealized Gain (Loss) on Investments	[1]				10.9	12.4
Interest in common units of NCM acquired by Company									25.40%
Number of common units of NCM owned by Company									43.7
Carrying value					$ 29.0	18.1	9.6			$ 135.4
Impairment of long-lived and other assets	[1],[2]					(0.7)	$ (113.2)
Deferred revenue or NCM screen advertising advances extended term					2041-02
Investment in NCMI [Member]
Schedule Of Equity Method Investments [Line Items]
NCMI new share issued in exchange				43.7
Common Unit Redemption Price		$ 0.6
Reduction in investment in NCM					$ 0.5
Net gain on investment in NCMI					0.1
Unrealized Gain (Loss) on Investments					$ 10.9	$ 12.4
Number of Common Shares Held in N C M I								4.4
Interest in common units of NCM acquired by Company					4.50%
Ncm [Member]
Schedule Of Equity Method Investments [Line Items]
Remaining performance obligations					$ 174.0
Deferred revenue amortization year and month					2041-02
Ncm [Member] | Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage Of Incremental Borrowing Rates					4.40%
Ncm [Member] | Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage Of Incremental Borrowing Rates					8.30%

[1] See Investment in National CineMedia below.

[2] 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.