Fair Value - Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	$ 17.5
Restricted cash	0.7	$ 0.8
Fair Value, Recurring
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	407.0	257.1
Restricted cash	0.7	0.8
Short-term investments	57.8	56.9
Interest rate swap contract	2.6
Foreign currency forward contracts	6.6	5.6
Total assets	492.2	320.4
Foreign currency forward contracts	6.3	1.0
Total liabilities	6.3	1.0
Fair Value, Recurring | Level 1
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	404.4	244.8
Restricted cash	0.7	0.8
Short-term investments	0.0	0.0
Interest rate swap contract	0.0
Foreign currency forward contracts	0.0	0.0
Total assets	405.1	245.6
Foreign currency forward contracts	0.0	0.0
Total liabilities	0.0	0.0
Fair Value, Recurring | Level 2
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	2.6	12.3
Restricted cash	0.0	0.0
Short-term investments	57.8	56.9
Interest rate swap contract	2.6
Foreign currency forward contracts	6.6	5.6
Total assets	69.6	74.8
Foreign currency forward contracts	6.3	1.0
Total liabilities	6.3	1.0
Fair Value, Recurring | Level 3
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	0.0	0.0
Restricted cash	0.0	0.0
Short-term investments	0.0	0.0
Interest rate swap contract	0.0
Foreign currency forward contracts	0.0	0.0
Total assets	0.0	0.0
Foreign currency forward contracts	0.0	0.0
Total liabilities	$ 0.0	$ 0.0