THEATRE PROPERTIES AND EQUIPMENT - Shedule Of Properties And Equipment (Detail) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total		$ 3,395.3	$ 3,368.8
Less: accumulated depreciation and amortization	[1]	2,163.2	1,985.9
Total		1,232.1	1,382.9
Land
Property, Plant and Equipment [Line Items]
Total		99.7	102.6
Building
Property, Plant and Equipment [Line Items]
Total		528.9	537.0
Property Under Finance Lease
Property, Plant and Equipment [Line Items]
Total		130.3	138.3
Theatre furniture and equipment
Property, Plant and Equipment [Line Items]
Total		1,429.5	1,402.7
Leasehold interests and improvements
Property, Plant and Equipment [Line Items]
Total		$ 1,206.9	$ 1,188.2

[1] Amortization of finance lease assets is included in depreciation and amortization expense on the consolidated statements of loss. Accumulated amortization of finance lease assets as of December 31, 2021 and 2022 was $57.8 and $62.5, respectively.