v3.22.4
INVESTMENTS (Details)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Mar. 14, 2023
Mar. 14, 2022
USD ($)
$ / shares
shares
Mar. 12, 2020
USD ($)
$ / shares
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2021
USD ($)
shares
Mar. 31, 2020
shares
Dec. 31, 2022
USD ($)
item
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
Mar. 30, 2022
$ / shares
Dec. 26, 2013
Investments                      
Number of Theatres | item             3        
Recorded equity in (earnings) loss             $ (1.6) $ 11.0 $ (30.9)    
Fair value, reduction in investment                 8.6    
Amortizable intangible asset             26.5 27.6      
Surrender of common units for transferred theatres         $ 9.2            
Equity Method Investments Ownership Transactions [Abstract]                      
Unrealized loss (gain) on investments             (6.3)        
Exhibitor Services Agreement                      
Investments                      
Value of common units returned under Unit Adjustment agreement             $ (15.0)        
Subsequent Events                      
Equity Method Investments Ownership Transactions [Abstract]                      
Stock split conversion ratio 0.1                    
Europe                      
Investments                      
Number of Theatres | item             57        
NCM                      
Investments                      
Ownership percentage                     4.00%
Common units returned under Common Unit Adjustment Agreement | shares       5,954,646   1,390,566          
Value of common units returned under Unit Adjustment agreement       $ 15.0              
Price per share (in dollars per share) | $ / shares     $ 3.46             $ 2.52  
Equity Method Investments Membership Units Surrendered for Divestiture | shares         3,012,738            
Realized loss on investment             $ 13.5        
Cash distribution received               $ 5.7      
Equity Method Investments Ownership Transactions [Abstract]                      
Number of shares sold | shares               1,400,000      
Value of stock sold             1.5        
NCM | Exhibitor Services Agreement                      
Investments                      
Value of common units returned under Unit Adjustment agreement     $ 4.8                
Surrender of common units for transferred theatres         $ 9.2            
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                  
Hycroft | Investment Income                      
Equity Method Investments Ownership Transactions [Abstract]                      
Unrealized loss (gain) on investments             $ 6.3        
57 Theatres | Europe                      
Investments                      
Ownership percentage             50.00%        
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%        
SV Holdco                      
Investments                      
Ownership percentage             18.30%        
SV Holdco | Class C Units                      
Investments                      
Ownership percentage             18.30%        
AC JV, LLC                      
Investments                      
Ownership percentage             32.00%        
AC JV, LLC | Founding Members                      
Investments                      
Ownership percentage                     32.00%
DCIP                      
Investments                      
Recorded equity in (earnings) loss             $ 3.4 $ (12.2) 14.5    
Recorded investment reduction               $ 0.0      
Fair value of distribution                 $ 125.2    
Equity recorded in net earnings             $ 4.0        
SCC                      
Investments                      
Ownership percentage             10.00%        
Recorded equity in (earnings) loss             $ (7.6)        
U.S. theatres and IMAX screen                      
Investments                      
Ownership percentage             50.00%        
Number of Theatres | item             3        
DCDC                      
Investments                      
Ownership percentage             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%        
Maximum | Non consolidated investee                      
Investments                      
Ownership percentage             50.00%