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DISTRIBUTION AGREEMENTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
DISTRIBUTION AGREEMENTS      
Termination costs $ 35.4 $ 79.8 $ 224.0
Distribution agreement (in years) 20 years    
Revenue recognized $ 22.3 26.1 50.5
Amortization of deferred revenue. $ 0.6 $ 5.7 $ 39.8