Debt - Components (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt
Unamortized debt issuance costs	$ (3.4)	$ (1.3)
Total notes and loans outstanding	2,140.0	1,260.6
Total debt	2,158.4	1,281.5
Current portion of long-term debt and finance lease obligations	(26.4)	(121.2)
Total long-term debt, less current portion	2,132.0	1,160.3
Switzerland Francs Notes Under The 2024 Term Loan Agreement Due 2027
Debt
Debt, before unamortized debt issuance costs	83.5
Switzerland Francs notes under the 2024 term loan agreement due 2029
Debt
Debt, before unamortized debt issuance costs	83.5
Switzerland Francs notes under the 2024 term loan agreement due 2031
Debt
Debt, before unamortized debt issuance costs	167.0
Switzerland Francs notes under the 2024 notes purchase agreement due 2034
Debt
Debt, before unamortized debt issuance costs	55.7
Switzerland Francs Notes under the 2024 Note Purchase Agreement Due 2036
Debt
Debt, before unamortized debt issuance costs	218.2
Switzerland Francs Notes under the 2024 Note Purchase Agreement Due 2039
Debt
Debt, before unamortized debt issuance costs	205.9
Euro Notes Under The 2021 Purchase Agreement Due 2031
Debt
Debt, before unamortized debt issuance costs	160.7	165.8
2019 Note Purchase Agreement Due 2029
Debt
Debt, before unamortized debt issuance costs	330.6	353.3
Switzerland Francs Notes Under The 2021 Notes Purchase Agreement Due 2031
Debt
Debt, before unamortized debt issuance costs	333.9	356.9
2024 Revolving Credit Agreement
Debt
Debt, before unamortized debt issuance costs	222.6
2019 Term Loan Agreement With Balloon Payment Due 2026
Debt
Debt, before unamortized debt issuance costs	270.8	278.3
2012 Note Purchase Agreement Due 2024
Debt
Debt, before unamortized debt issuance costs		100.0
Other loan
Debt
Debt, before unamortized debt issuance costs	11.0	7.6
Capital lease obligations and other loans
Debt
Total debt	$ 18.4	$ 20.9

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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