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REVENUE AND CONTRACT ACQUISITION COSTS - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]          
Price allocated to remaining performance obligations $ 1,419.4   $ 1,419.4    
Remaining performance obligations 5 years   5 years    
Revenue recognized $ 57.7 $ 47.0 $ 281.4 $ 244.8  
Timing of performance obligation     Sales-type leases have terms that generally range from 24 to 84 months and are usually collateralized by a security interest in the underlying assets.    
Costs capitalized as contract acquisition costs $ 43.4   $ 43.4   $ 34.2