v3.26.3
Segments - Holdings - Selected Financial Information by Geographic Area (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue $ 1,059.1 $ 857.5 $ 2,788.6 $ 2,338.7  
Reportable Geographical Components          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue 1,059.1 857.5 2,788.6 2,338.7  
Theater properties and equipment, net 1,181.7   1,181.7   $ 1,175.8
Reportable Geographical Components | U.S.          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue 821.9 687.0 2,203.3 1,869.2  
Theater properties and equipment, net 992.2   992.2   993.1
Reportable Geographical Components | Brazil          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue 90.2 55.6 219.5 164.5  
Theater properties and equipment, net 59.2   59.2   55.3
Reportable Geographical Components | Other international countries          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue 151.4 118.3 376.9 314.2  
Theater properties and equipment, net 130.3   130.3   $ 127.4
Reportable Geographical Components | Eliminations          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Elimination of intersegment revenue $ (4.4) $ (3.4) $ (11.1) $ (9.2)