Fair Value - Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	$ 22.0
Restricted cash	0.7	$ 0.8
Fair Value, Recurring
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	283.3	257.1
Restricted cash	0.7	0.8
Short-term investments	30.6	56.9
Interest rate swap contract	3.3
Foreign currency forward contracts	3.4	5.6
Total assets	343.3	320.4
Foreign currency forward contracts	2.5	1.0
Total liabilities	2.5	1.0
Fair Value, Recurring | Level 1
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	281.5	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	282.2	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	1.8	12.3
Restricted cash	0.0	0.0
Short-term investments	30.6	56.9
Interest rate swap contract	3.3
Foreign currency forward contracts	3.4	5.6
Total assets	39.1	74.8
Foreign currency forward contracts	2.5	1.0
Total liabilities	2.5	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