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Indebtedness (Components of Indebtedness) (Details) € in Millions, $ in Millions	Mar. 31, 2025 USD ($)	Mar. 31, 2025 EUR (€)	Mar. 21, 2025	Jan. 24, 2025	Dec. 31, 2024 USD ($)	Oct. 06, 2021	Jan. 25, 2019
Debt Instrument [Line Items]
Debt issuance costs	$ (11.4)				$ (12.0)
Total long-term debt	2,825.5				2,558.1
Total long-term indebtedness	2,757.5				2,233.3
Senior Notes \| 5.450% Senior notes due 2027
Debt Instrument [Line Items]
Interest rate percentage			5.45%
Long-term debt, gross	400.0				400.0
Senior Notes \| 5.800% Senior notes due 2034
Debt Instrument [Line Items]
Interest rate percentage			5.80%
Long-term debt, gross	700.0				700.0
Senior Notes \| 0.800% Senior notes due 2028
Debt Instrument [Line Items]
Interest rate percentage						0.80%
Long-term debt, gross	648.5	€ 600.0			622.7
Senior Notes \| 1.002% EIB Senior term loan due 2025
Debt Instrument [Line Items]
Interest rate percentage				1.002%			1.002%
Long-term debt, gross	0.0				259.5
Less current portion of long-term debt	0.0				(259.5)
Senior Notes \| Senior term loans due between 2025 and 2028
Debt Instrument [Line Items]
Long-term debt, gross	158.3				152.0
Less current portion of long-term debt	(68.0)				(65.3)
Other long term debt
Debt Instrument [Line Items]
Long-term debt, gross	0.0				0.0
Less current portion of long-term debt	0.0				0.0
Revolving Credit Facility \| Line of Credit \| Credit Facility, expires 2027
Debt Instrument [Line Items]
Long-term debt, gross	476.2				0.0
Multi-Currency Finance Contract \| EIB Senior term loan due 2029
Debt Instrument [Line Items]
Long-term debt, gross	270.2				259.5
Multi-Currency Finance Contract \| EIB Senior term loan due 2030
Debt Instrument [Line Items]
Long-term debt, gross	$ 183.7				$ 176.4