SEGMENTS - HOLDINGS - Selected Financial Information by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 3,049.5	$ 3,066.7	$ 2,454.7
Theatre properties and equipment, net of accumulated depreciation	1,145.1	1,161.7
Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	3,049.5	3,066.7	2,454.7
Theatre properties and equipment, net of accumulated depreciation	1,145.1	1,161.7
Reportable Geographical Components | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,448.1	2,428.1	1,977.9
Theatre properties and equipment, net of accumulated depreciation	996.1	1,002.1
Reportable Geographical Components | Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	243.8	233.4	179.0
Theatre properties and equipment, net of accumulated depreciation	47.2	54.7
Reportable Geographical Components | Other international countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	368.9	418.0	305.5
Theatre properties and equipment, net of accumulated depreciation	101.8	104.9
Reportable Geographical Components | Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ (11.3)	$ (12.8)	$ (7.7)