Debt - Components (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Debt
Unamortized debt issuance costs		$ (3.1)	$ (1.3)
Total notes and loans outstanding	[1]	2,076.8	1,260.6
Total debt		2,094.3	1,281.5
Current portion of long-term debt and finance lease obligations		(32.5)	(121.2)
Total long-term debt, less current portion		2,061.8	1,160.3
2019 Term Loan Agreement With Ballon Payment Due December 2026
Debt
Debt, before unamortized debt issuance costs		263.3	278.3
Note Purchase Agreements Under 2021 Notes Due December 8, 2031
Debt
Debt, before unamortized debt issuance costs	[2]	330.5	356.9
Note Purchase Agreements Under 2019 Notes Due December 11, 2029
Debt
Debt, before unamortized debt issuance costs	[2]	327.2	353.3
Note Purchase Agreements Under 2021 Notes Due December 8, 2031
Debt
Debt, before unamortized debt issuance costs	[2]	155.3	165.8
Note Purchase Agreements Under 2012 Notes Due January 18, 2024
Debt
Debt, before unamortized debt issuance costs	[2]	0.0	100.0
Note Purchase Agreements Under 2024 Notes Due April 15, 2034
Debt
Debt, before unamortized debt issuance costs	[2]	55.1	0.0
Note Purchase Agreements Under 2024 Notes Due April 15, 2036
Debt
Debt, before unamortized debt issuance costs	[2]	215.9	0.0
Note Purchase Agreements Under 2024 Notes Due April 15, 2039
Debt
Debt, before unamortized debt issuance costs	[2]	203.8	0.0
CHF loan due 2027
Debt
Debt, before unamortized debt issuance costs		162.1	0.0
CHF loan due 2029
Debt
Debt, before unamortized debt issuance costs		162.1	0.0
CHF Loan due 2031
Debt
Debt, before unamortized debt issuance costs	[2]	165.2	0.0
2024 Revolving Credit Agreement
Debt
Debt, before unamortized debt issuance costs	[3]	27.5	0.0
Other Loans
Debt
Debt, before unamortized debt issuance costs		11.9	7.6
Finance Lease Obligations
Debt
Total debt		$ 17.5	$ 20.9

[1] As of December 31, 2024 the annual maturities of notes and loans outstanding excluding the impact of unamortized debt issuance costs, are as follows (in millions): 2025: $29.2; 2026: $266.3; 2027: $163.5; 2028: $17.8; 2029: $498.5; and thereafter: $1,104.6.

[2] As of December 31, 2024 and 2023, the fair value of the Company's long-term fixed interest rate debt was $1,278.9 million and $883.3 million as of December 31, 2024, and December 31, 2023, respectively.

[3] Subsequent to December 31, 2024 and up until the date of filing this Annual Report on Form 10K, the Company borrowed CHF 100 million (approximately $109.9 million) and repaid CHF 125 million (approximately $137.9 million) of debt outstanding under the 2024 Amended and Restated Revolving Credit Agreement.