Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Remaining performance obligation	$ 2,390.0		$ 2,390.0
Threshold period past due	60 days		60 days
Allowance for credit losses	$ 2.2		$ 2.2		$ 1.2
Amortization of deferred contract costs	35.3	$ 27.5	99.8	$ 78.5
Service [Member]
Disaggregation of Revenue [Line Items]
Deferred revenue recognized in period	$ 263.1	$ 211.8	$ 921.7	$ 754.5