v3.21.2
INVESTMENTS (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
item
Jun. 30, 2020
USD ($)
Investments        
Recorded equity in loss $ (2.7) $ (12.4) $ (5.5) $ (15.3)
Equity Method Investments Ownership Transactions [Abstract]        
Recorded equity in loss (2.7) (12.4) (5.5) (15.3)
Equity Method Investment, Nonconsolidated Investee(s)        
Investments        
Recorded equity in loss 2.7 12.4 5.5 15.3
Equity Method Investments Ownership Transactions [Abstract]        
Recorded equity in loss $ 2.7 $ 12.4 $ 5.5 $ 15.3
U.S.        
Investments        
Number of theatres with partnership interests | item     3  
Europe        
Investments        
Ownership percentage 50.00%   50.00%  
Number of theatres with partnership interests | item     54  
DCM        
Investments        
Ownership percentage 50.00%   50.00%  
SV Holdco        
Investments        
Ownership percentage 18.40%   18.40%  
AC JV, LLC        
Investments        
Ownership percentage 32.00%   32.00%  
DCIP        
Investments        
Ownership percentage 29.00%   29.00%  
SCC        
Investments        
Ownership percentage 10.00%   10.00%  
DCDC        
Investments        
Ownership percentage 14.60%   14.60%  
Maximum        
Investments        
Ownership percentage 50.00%   50.00%