v3.19.3.a.u2
THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - Investments, Goodwill, Payables, Leases (Details)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Jun. 18, 2018
USD ($)
item
Dec. 18, 2017
USD ($)
item
Sep. 14, 2017
USD ($)
item
Dec. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 14, 2018
USD ($)
Dec. 26, 2013
Investments                      
Impairment of intangible assets           $ 0.0 $ 0.0 $ 0.0      
Number of theatres | item           4          
Number of Reporting Units | item           2 3        
Convertible Debt, Noncurrent                   $ 600.0  
Goodwill         $ 4,789.1 $ 4,789.1 $ 4,788.7 4,931.7      
Goodwill impairment $ 0.0           0.0        
Percentage of company's market enterprise value         80.00%            
Accounts payable related to checks issued but not yet presented to bank         $ 40.9 $ 40.9 42.6        
Optional renewal term, operating lease         20 years 20 years          
ROU Assets         $ 4,796.0 $ 4,796.0          
Total Lease Liabilities         5,499.6 5,499.6          
Reduction of rent             35.0        
Number of theatres sold | item   1 1 7              
Net proceeds   $ 50.1   $ 128.4              
Deferred gain on sale   $ 27.3   $ 78.2 102.4 102.4          
Closing costs     $ 7.8                
Recognized Gain loss     $ (0.5)                
U.S.                      
Investments                      
Goodwill         3,072.6 3,072.6 3,072.6 3,072.6      
Percentage the reporting unit's carrying value exceeds its fairvalue 9.90%                    
International markets                      
Investments                      
Goodwill         $ 1,716.5 $ 1,716.5 $ 1,716.1 $ 1,859.1      
Percentage the reporting unit's carrying value exceeds its fairvalue 11.80%                    
Nordic                      
Investments                      
Ownership percentage         50.00% 50.00%          
Number of theatres | item           55          
Minimum                      
Investments                      
Initial base terms of operating leases         12 years 12 years          
Operating lease, remaining lease term           1 year          
Maximum                      
Investments                      
Ownership percentage         50.00% 50.00%          
Initial base terms of operating leases         15 years 15 years          
Operating lease, remaining lease term           25 years          
NCM                      
Investments                      
Ownership percentage   4.50%                 4.00%
SV Holdco                      
Investments                      
Ownership percentage         18.20% 18.20%          
SV Holdco | Class C Units                      
Investments                      
Ownership percentage         18.20% 18.20%          
DCM                      
Investments                      
Ownership percentage         50.00% 50.00%          
AC JV, LLC                      
Investments                      
Ownership percentage         32.00% 32.00%          
DCIP                      
Investments                      
Ownership percentage         29.00% 29.00%          
DCDC                      
Investments                      
Ownership percentage         14.60% 14.60%          
SSC                      
Investments                      
Ownership percentage         10.00% 10.00%          
U.S. theatres and IMAX screen                      
Investments                      
Ownership percentage         50.00% 50.00%          
Number of theatres | item           4          
6.375% Senior Subordinated Notes due 2024                      
Investments                      
Convertible Debt, Noncurrent                 $ 600.0