v3.19.3.a.u2
LEASES - Stockholders' equity (Details) - USD ($)
$ in Millions
Jan. 01, 2019
Dec. 31, 2018
Jan. 01, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at the beginning of the period $ 1,397.6    
Cumulative effect of change made to accumulated deficit   $ (31.8) $ 52.9
Accounting Standards Update 2016-02 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at the beginning of the period (550.9)    
Derecognition of existing assets for certain sale leaseback transactions previously recorded in property, net (405.9)    
Derecognition of existing liabilities for certain sale leaseback transactions previously recorded in current maturities of corporate borrowings and capital and financing lease obligations 427.5    
Derecognition of deferred gains from the sale leaseback transactions previously recorded in other long-term liabilities 102.4    
Difference in fair value compared to the basis of the right-of-use assets for theatres impaired under the new standard (49.0)    
Deferred taxes 1.2    
Cumulative effect of change made to accumulated deficit 76.2    
Balance at the end of the period $ (474.7)