Debt - Components (Parenthetical) (Details) € in Millions, SFr in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2025 USD ($)	Mar. 31, 2025 CHF (SFr)	Mar. 31, 2025 EUR (€)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 CHF (SFr)	Apr. 01, 2025 USD ($)	Apr. 01, 2025 CHF (SFr)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity | $		$ 1,073.4
Repayment of long-term debt | $		7.7			$ 107.2
Long-term fixed interest rate debt | $		1,288.4							$ 1,278.9
2024 Amended and Restated Credit Agreement | Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 110.5	SFr 90.0
Borrowings through swing line drawing | $							$ 10.0
2019 Term Loan Agreement With Quarterly Payment Due December 2026
Debt Instrument [Line Items]
Quarterly payments of loan | $		$ 3.8
Note Purchase Agreements Under 2024 Notes Due April 15, 2034
Debt Instrument [Line Items]
Note purchase agreements, amount | SFr	[1]		SFr 50.0
Debt Instrument, Interest Rate During Period	[1]	2.56%	2.56%	2.56%
Note Purchase Agreements Under 2024 Notes Due April 15, 2036
Debt Instrument [Line Items]
Note purchase agreements, amount | SFr	[1]		SFr 146.0			SFr 50.0
Debt Instrument, Interest Rate During Period	[1]	2.62%	2.62%	2.62%	2.60%	2.60%
Note Purchase Agreements Under 2024 Notes Due April 15, 2039
Debt Instrument [Line Items]
Note purchase agreements, amount | SFr	[1]		SFr 135.0			SFr 50.0
Debt Instrument, Interest Rate During Period	[1]	2.71%	2.71%	2.71%	2.62%	2.62%
Note Purchase Agreements Under 2021 Notes Due December 8, 2031
Debt Instrument [Line Items]
Note purchase agreements, amount | SFr	[1]		SFr 300.0
Debt Instrument, Interest Rate During Period	[1]	0.88%	0.88%	0.88%
Note Purchase Agreements Under 2019 Notes Due December 11, 2029
Debt Instrument [Line Items]
Note purchase agreements, amount | SFr	[1]		SFr 297.0
Debt Instrument, Interest Rate During Period	[1]	1.01%	1.01%	1.01%
Note Purchase Agreements Under 2021 Notes Due December 8, 2031
Debt Instrument [Line Items]
Note purchase agreements, amount | €	[1]			€ 150
Debt Instrument, Interest Rate During Period	[1]	1.03%	1.03%	1.03%

[1] The fair value of the Company's long-term fixed interest rate debt was $1,288.4 million and $1,278.9 million as of March 31, 2025, and December 31, 2024, respectively.