INVESTMENT IN NATIONAL CINEMEDIA, INC / NATIONAL CINEMEDIA LLC - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions				12 Months Ended
		Mar. 20, 2023	Feb. 17, 2023	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021	Aug. 03, 2023	Jan. 01, 2023	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Number of additional common units of NCM received under common unit adjustment agreement				4.8
Value of common units received from NCM				$ 0.0	[1]	$ 1.3		$ 10.2
Impairment of long-lived and other assets				(16.6)		(174.1)		(20.8)
Noncontrolling interests				9.0		9.3
Investment In Ncm [Member]
Schedule Of Equity Method Investments [Line Items]
Number of NCM to Redeem Shares			42.0
Common Share Units in Ncm in Exchange		1.7	43.7
Interest in common units of NCM acquired by Company										25.40%
Number of common units of NCM owned by Company										43.7
Carrying value						9.6		$ 135.4			$ 152.0
Impairment of long-lived and other assets				$ (0.7)		$ (113.2)	[2]
Deferred revenue or NCM screen advertising advances extended term				2041-02
Investment in NCMI [Member]
Schedule Of Equity Method Investments [Line Items]
Stock Issued During Period, Shares, New Issues		1.7	42.0
Unrealized Gain (Loss) on Investments	[2]			$ 12.4
Number of Common Shares Held in N C M I									4.4
Interest in common units of NCM acquired by Company				5.00%
Carrying value				$ 18.1
Impairment of long-lived and other assets	[3]			0.7
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] Additions to theatre properties and equipment included in accounts payable as of December 31, 2022 and 2023 were $12.0 and $6.6 respectively.

[2] See Investment in National CineMedia 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