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REVENUE AND CONTRACT ACQUISITION COSTS - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]      
Timing of performance obligation Payments are generally due 30 days from date of invoice. 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.    
Price allocated to remaining performance obligations $ 1,444.0    
Revenue recognized 132.2 $ 115.8  
Costs capitalized as contract acquisition costs $ 37.1   $ 34.2