SEGMENTS - HOLDINGS - Selected Financial Information by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 3,066.7	$ 2,454.7	$ 1,510.5
Theatre properties and equipment, net of accumulated depreciation	1,161.7	1,232.1
Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	3,066.7	2,454.7	1,510.5
Theatre properties and equipment, net of accumulated depreciation	1,161.7	1,232.1
Reportable Geographical Components | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,428.1	1,977.9	1,296.3
Theatre properties and equipment, net of accumulated depreciation	1,002.1	1,075.3
Reportable Geographical Components | Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	233.4	179.0	73.5
Theatre properties and equipment, net of accumulated depreciation	54.7	49.5
Reportable Geographical Components | Other international countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	418.0	305.5	143.4
Theatre properties and equipment, net of accumulated depreciation	104.9	107.3
Reportable Geographical Components | Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ (12.8)	$ (7.7)	$ (2.7)