Selected Financial Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 610.7	$ 460.5
Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	610.7	460.5
Theatre properties and equipment, net	1,204.1		$ 1,232.1
Reportable Geographical Components | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	481.7	373.7
Theatre properties and equipment, net	1,047.7		1,075.3
Reportable Geographical Components | Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44.5	33.1
Theatre properties and equipment, net	50.6		49.5
Reportable Geographical Components | Other international countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	87.1	55.4
Theatre properties and equipment, net	105.8		$ 107.3
Reportable Geographical Components | Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ (2.6)	$ (1.7)