v3.22.1
INVESTMENTS (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Mar. 14, 2022
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2022
USD ($)
item
Mar. 31, 2021
USD ($)
Mar. 30, 2022
$ / shares
Dec. 31, 2021
USD ($)
Investments            
Recorded equity in (earnings) loss     $ (5.1) $ (2.8)    
Investments in equity method investees   $ 79.1 79.1     $ 85.6
Cash distributions from non-consolidated entities     0.7 0.3    
Exhibitor Services Agreement            
Investments            
Value of common units returned under Unit Adjustment agreement     (15.0)      
Equity Method Investment, Nonconsolidated Investee(s)            
Investments            
Recorded equity in (earnings) loss     $ 5.1 $ 2.8    
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     57      
NCM            
Investments            
Common units returned under Common Unit Adjustment Agreement | shares   5,954,646        
Price per share (in dollars per share) | $ / shares         $ 2.52  
NCM | Exhibitor Services Agreement            
Investments            
Value of common units returned under Unit Adjustment agreement   $ 15.0        
Hycroft            
Equity Method Investments Ownership Transactions [Abstract]            
Cost of investment $ 27.9          
Number of shares purchased | shares 23,400,000          
Stock split conversion ratio 1          
Price per unit in equity method investment | $ / shares $ 1.193          
Number of shares to be received for each unit | shares 1          
Unrealized gain on investments in Hycroft     $ (63.9)      
Hycroft | Investment Income            
Equity Method Investments Ownership Transactions [Abstract]            
Unrealized gain on investments in Hycroft     $ 63.9      
Investment in Hycroft Mining Holding Corporation Warrants            
Investments            
Price per share (in dollars per share) | $ / shares $ 1.068          
Equity Method Investments Ownership Transactions [Abstract]            
Number of shares to be received for each unit | shares 1          
Term 5 years          
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%      
Minimum | NCM            
Investments            
Percentage change in the total annual attendance of all the founding members required to cause an earlier common unit adjustment   2.00% 2.00%      
Maximum            
Investments            
Ownership percentage   50.00% 50.00%