Fair Value - Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	$ 8.6	$ 9.1
Fair Value, Recurring
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	8.6	9.1
Short-term investments	38.6	39.2
Interest rate swap contract	2.1	3.1
Foreign currency forward contracts	3.0	4.5
Total assets	382.8	387.5
Foreign currency forward contracts	23.1	19.8
Total liabilities	23.1	19.8
Fair Value, Recurring | Level 1, 2 and 3
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	295.3	292.1
Fair Value, Recurring | Level 1
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	294.5	289.3
Restricted cash	8.6	9.1
Short-term investments	0.0	0.0
Interest rate swap contract	0.0	0.0
Foreign currency forward contracts	0.0	0.0
Total assets	303.1	298.4
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	0.8	2.8
Restricted cash	0.0	0.0
Short-term investments	38.6	39.2
Interest rate swap contract	2.1	3.1
Foreign currency forward contracts	3.0	4.5
Total assets	44.5	49.6
Foreign currency forward contracts	23.1	19.8
Total liabilities	23.1	19.8
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	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
Fair Value, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	$ 35.2	$ 39.5