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REVENUE (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]        
Amortization of Deferred Sales Commissions $ 5.5 $ 5.1 $ 10.8 $ 9.5
Capitalized Contract Cost, Amortization $ 2.3 $ 1.9 5.3 3.8
Increase Decrease in Operating Income Loss     23.3  
Contract with Customer, Performance Obligation Satisfied in Previous Period     13.7 48.4
Deferred Revenue, Revenue Recognized     $ 102.2 $ 161.6