Debt - Components (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt
Unamortized debt issuance costs	$ (1.3)	$ (1.7)
Total notes and loans outstanding	1,260.6	1,205.1
Total debt	1,281.5	1,219.2
Current portion of long-term debt and finance lease obligations	(121.2)	(18.7)
Total long-term debt, less current portion	1,160.3	1,200.5
Euro Notes Under The 2021 Purchase Agreement Due 2031
Debt
Debt, before unamortized debt issuance costs	165.8	160.6
Switzerland Francs Notes Under The 2021 Notes Purchase Agreement Due 2031
Debt
Debt, before unamortized debt issuance costs	356.9	325.1
2019 Note Purchase Agreement Due 2029
Debt
Debt, before unamortized debt issuance costs	353.3	321.9
2019 Term Loan Agreement With Ballon Payment Due 2026
Debt
Debt, before unamortized debt issuance costs	278.3	293.3
2012 Note Purchase Agreement Due 2024
Debt
Debt, before unamortized debt issuance costs	100.0	100.0
Other Loan [Member]
Debt
Debt, before unamortized debt issuance costs	7.6	5.9
Capital lease obligations and other loans
Debt
Total debt	$ 20.9	$ 14.1