Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Remaining performance obligation	$ 2,320.0		$ 2,320.0
Threshold period past due	60 days		60 days
Allowance for doubtful accounts	$ 2.2		$ 2.2		$ 1.2
Amortization of deferred contract costs	33.2	$ 25.9	64.5	$ 51.0
Service [Member]
Disaggregation of Revenue [Line Items]
Deferred revenue recognized in period	$ 307.9	$ 252.0	$ 656.8	$ 540.6