THEATRE PROPERTIES AND EQUIPMENT - Summary of Carrying Value of Ecuador's Significant Assets and Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Theatre properties and equipment, net of accumulated depreciation		$ 1,161.7	$ 1,232.1
Operating lease right-of-use assets, net	[1]	986.4	1,102.7
Goodwill	[2]	1,251.0	1,250.9	$ 1,248.8
Theatre Assets Held for Sale [Member]
Property, Plant and Equipment [Line Items]
Theatre properties and equipment, net of accumulated depreciation		0.0	5.4
Operating lease right-of-use assets, net		0.0	2.9
Goodwill		0.0	4.2
Assets		0.0	15.3
Liabilities		$ 0.0	$ 8.5

[1] The operating lease right-of-use assets and liabilities recorded on the Company’s consolidated balance sheets generally do not include renewal options that have not yet been exercised.

[2] Balances are presented net of accumulated impairment losses of $214.0 for the U.S. operating segment and $43.8 for the international operating segment.