v3.10.0.1
INVESTMENTS (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 02, 2018
USD ($)
Jun. 18, 2018
USD ($)
agreement
$ / shares
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
shares
Sep. 30, 2018
USD ($)
shares
Mar. 31, 2018
USD ($)
$ / shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2018
USD ($)
item
shares
Sep. 30, 2017
USD ($)
Mar. 15, 2018
$ / shares
Dec. 31, 2017
USD ($)
Jun. 30, 2017
$ / shares
Mar. 16, 2017
$ / shares
Equity Method Investments Ownership Transactions [Abstract]                          
Gain (loss) on sale                 $ 22,600,000        
Price per share (in dollars per share) | $ / shares     $ 5.19     $ 5.19              
Recorded equity in earnings         $ 70,000,000   $ (1,800,000) $ 74,000,000 (199,100,000)        
Loss NCM charged to merger, acquisition and transaction costs                 22,600,000        
U.S. theatres and IMAX screen                          
Investments                          
Number of theatres | item               4          
Amounts due to affiliate         700,000     $ 700,000     $ 2,800,000    
NCM                          
Investments                          
Ownership percentage   4.50%                      
Common units returned under Common Unit Adjustment Agreement | shares     915,150                    
Equity Method Investments Ownership Transactions [Abstract]                          
Gain on divestment of equity method investment     $ (1,100,000)   $ 28,900,000     30,000,000 (22,200,000)        
Number of shares sold | shares         21,477,480                
Value of stock sold         $ 156,800,000                
Gain (loss) on sale         (28,900,000) $ (1,100,000) (21,000,000)            
Impairment of investment               16,000,000 204,500,000        
Price per share (in dollars per share) | $ / shares   $ 7.30 $ 5.19     $ 5.19       $ 5.64   $ 7.42  
Number of unit purchase agreements | agreement   2                      
Number of investment units sold | shares   10,738,740                      
Aggregate consideration   $ 156,800,000                      
Ownership percentage   4.50%                      
Recorded equity in earnings         28,900,000   (11,100,000) 17,300,000 (216,800,000)        
Loss NCM charged to merger, acquisition and transaction costs         $ (28,900,000) $ (1,100,000) (21,000,000)            
NCM | Investment Income (Expense) [Member]                          
Equity Method Investments Ownership Transactions [Abstract]                          
Receipt under tax receivable agreement               $ 5,400,000 5,500,000        
NCM, Inc.                          
Equity Method Investments Ownership Transactions [Abstract]                          
Number of units sold | shares               1,000,000          
DCM                          
Investments                          
Ownership percentage         50.00%     50.00%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         50.00%     50.00%          
SV Holdco                          
Investments                          
Ownership percentage         21.20%     21.20%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         21.20%     21.20%          
AC JV, LLC                          
Investments                          
Ownership percentage         32.00%     32.00%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         32.00%     32.00%          
DCIP                          
Investments                          
Ownership percentage         29.00%     29.00%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         29.00%     29.00%          
Recorded equity in earnings         $ 7,400,000   6,000,000 $ 20,900,000 21,200,000        
Other                          
Equity Method Investments Ownership Transactions [Abstract]                          
Recorded equity in earnings         $ 3,600,000   2,300,000 5,300,000 (4,300,000)        
Dreamscape                          
Equity Method Investments Ownership Transactions [Abstract]                          
Purchase of preferred shares               5,000,000          
Central Services Studios                          
Equity Method Investments Ownership Transactions [Abstract]                          
Purchase of preferred shares               $ 5,000,000          
U.S. theatres and IMAX screen                          
Investments                          
Number of screens | item               1          
U.S. theatres and IMAX screen | Europe                          
Investments                          
Ownership percentage         50.00%     50.00%          
Number of theatres | item               57          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         50.00%     50.00%          
DCDC                          
Investments                          
Ownership percentage         14.60%     14.60%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         14.60%     14.60%          
Unit Purchase Agreements                          
Equity Method Investments Ownership Transactions [Abstract]                          
Number of unit purchase agreements | agreement   2                      
Number of investment units sold | shares   10,738,740                      
Sale price of common units | $ / shares   $ 7.30                      
Aggregate consideration   $ 156,800,000                      
Threshold percentage of ownership Interest   4.50%                      
Screenvision                          
Investments                          
Ownership percentage         21.20%     21.20%          
Equity Method Investments Ownership Transactions [Abstract]                          
Gain (loss) on sale         $ 30,100,000                
Distribution and merger consideration received $ 45,900,000                        
Ownership percentage         21.20%     21.20%          
Carrying value of screenvision investment         $ 0     $ 0          
Recorded equity in earnings         30,100,000   $ 1,000,000 30,500,000 $ 800,000        
Loss NCM charged to merger, acquisition and transaction costs         $ 30,100,000                
Theatres Divested as Required by US DOJ | NCM                          
Investments                          
Total common units received | shares       361,892                  
Common units returned under Common Unit Adjustment Agreement | shares       2,850,453                  
Common units returned under waiver of exclusivity agreement | shares       1,807,220                  
Value of common units returned under waiver of exclusivity agreement       $ 22,600,000                  
Net common units received | shares       14,129,642                  
Value of net common units received               $ 176,900,000          
Equity Method Investments Ownership Transactions [Abstract]                          
Gain on divestment of equity method investment       $ (1,200,000)                  
Number of shares sold | shares             14,800,000 21,477,480          
Price per share (in dollars per share) | $ / shares                         $ 12.52
Maximum                          
Investments                          
Ownership percentage         50.00%     50.00%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         50.00%     50.00%          
Maximum | December 20, 2017                          
Investments                          
Ownership percentage         15.00%     15.00%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         15.00%     15.00%          
Maximum | December 20, 2018                          
Investments                          
Ownership percentage         7.50%     7.50%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         7.50%     7.50%          
Maximum | June 20, 2019                          
Investments                          
Ownership percentage         4.99%     4.99%          
Equity Method Investments Ownership Transactions [Abstract]                          
Ownership percentage         4.99%     4.99%          
Maximum | Theatres Divested as Required by US DOJ | NCM                          
Investments                          
Expenses       $ 1,000,000