Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	$ 1.1	$ 0.4
Fair Value, Recurring
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	1.1	0.4
Short-term investments	10.2	31.6
Foreign currency forward contracts	2.0	3.3
Total assets	483.2	454.2
Foreign currency forward contracts	7.5	11.4
Total liabilities	7.5	11.4
Fair Value, Recurring | Level 1, 2 and 3
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	437.6	384.4
Fair Value, Recurring | Level 1
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	434.7	381.0
Restricted cash	1.1	0.4
Short-term investments	0.0	0.0
Foreign currency forward contracts	0.0	0.0
Total assets	435.8	381.4
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	2.9	3.4
Restricted cash	0.0	0.0
Short-term investments	10.2	31.6
Foreign currency forward contracts	2.0	3.3
Total assets	15.1	38.3
Foreign currency forward contracts	7.5	11.4
Total liabilities	7.5	11.4
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
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	$ 32.3	$ 34.5