v3.20.4
REVENUE RECOGNITION - Changes in liabilities (Details) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred revenues related to contracts with customers      
Beginning balance $ 447.1 $ 412.8  
Cash received in advance 110.8 457.1  
Customer loyalty awards accumulated, net of expirations (3.4) 62.3 $ 101.6
Foreign currency translation adjustment 3.6 (3.4)  
Ending balance 400.6 447.1 412.8
Exhibitor Services Agreement      
Deferred revenues related to contracts with customers      
Beginning balance $ 549.7 $ 564.0  
Common Unit Adjustment-additions of common units 4.8 1.4  
Reclassification revenue, as the result of performance obligations satisfied $ (16.9) $ (15.7)  
Ending balance $ 537.6 549.7 $ 564.0
Term of amortization of the exhibitor services agreement (ESA) with NCM 30 years    
Admissions      
Deferred revenues related to contracts with customers      
Customer loyalty awards accumulated, net of expirations $ 8.4 29.4  
Reclassification revenue, as the result of performance obligations satisfied (118.5) (307.8)  
Food and beverage      
Deferred revenues related to contracts with customers      
Customer loyalty awards accumulated, net of expirations 15.0 69.7  
Reclassification revenue, as the result of performance obligations satisfied (32.0) (116.7)  
Total other theatre      
Deferred revenues related to contracts with customers      
Customer loyalty awards accumulated, net of expirations   2.8  
Reclassification revenue, as the result of performance obligations satisfied $ (33.8) (95.6)  
Austria theatres      
Deferred revenues related to contracts with customers      
Disposition of Austria theatres   $ (1.2)