Fair Value - Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	$ 8.0	$ 9.1
Fair Value, Recurring
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	8.0	9.1
Short-term investments	38.2	39.2
Interest rate swap contracts	1.0	3.1
Foreign currency forward contracts	1.7	4.5
Total assets	393.1	387.5
Foreign currency forward contracts	30.2	19.8
Total liabilities	30.2	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	304.2	292.1
Fair Value, Recurring | Level 1
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	304.2	289.3
Restricted cash	8.0	9.1
Short-term investments	0.0	0.0
Interest rate swap contracts	0.0	0.0
Foreign currency forward contracts	0.0	0.0
Total assets	312.2	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	0.0	2.8
Restricted cash	0.0	0.0
Short-term investments	38.2	39.2
Interest rate swap contracts	1.0	3.1
Foreign currency forward contracts	1.7	4.5
Total assets	40.9	49.6
Foreign currency forward contracts	30.2	19.8
Total liabilities	30.2	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 contracts	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	$ 40.0	$ 39.5