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Revenue Recognition - Deferred Revenue and Transaction Price Allocated to the Remaining Performance Obligations (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]        
Deferred revenue recognized $ 64.1 $ 51.6 $ 113.0 $ 88.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Revenue expected to be recognized 296.2   296.2  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Revenue expected to be recognized $ 194.8   $ 194.8  
Expected period of recognition 12 months   12 months