THEATRE PROPERTIES AND EQUIPMENT - Schedule Of Properties And Equipment (Detail) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total		$ 3,521.8	$ 3,491.0
Less: accumulated depreciation and amortization	[1]	(2,376.7)	(2,329.3)
Theatre properties and equipment, net		1,145.1	1,161.7
Land
Property, Plant and Equipment [Line Items]
Total		97.0	97.8
Building
Property, Plant and Equipment [Line Items]
Total		534.3	530.6
Property Under Finance Lease
Property, Plant and Equipment [Line Items]
Total		152.2	129.6
Theatre furniture and equipment
Property, Plant and Equipment [Line Items]
Total		1,514.5	1,432.8
Leasehold interests and improvements
Property, Plant and Equipment [Line Items]
Total		$ 1,223.8	$ 1,300.2

[1] Amortization of finance lease assets is included in depreciation and amortization expense on the consolidated statements of income (loss). Accumulated amortization of finance lease assets as of December 31, 2023 and 2024 was $73.9 and $58.4, respectively.