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Indebtedness (Components of Indebtedness) (Details) € in Millions, $ in Millions	Jun. 30, 2024 USD ($)	Jun. 30, 2024 EUR (€)	Mar. 21, 2024	Jan. 25, 2024	Dec. 31, 2023 USD ($)	Sep. 29, 2023	Oct. 06, 2021	Jan. 25, 2019 EUR (€)
Debt Instrument [Line Items]
Debt issuance costs	$ (13.0)				$ (3.1)
Total long-term debt	3,863.7				1,379.5
Total long-term indebtedness	3,595.2				1,377.2
Senior Notes \| $5.450% Senior notes due 2027
Debt Instrument [Line Items]
Interest rate percentage			5.45%
Long-term debt, gross	400.0				0.0
Senior Notes \| $5.800% Senior notes due 2034
Debt Instrument [Line Items]
Interest rate percentage			5.80%
Long-term debt, gross	700.0				0.0
Senior Notes \| 0.800% Senior notes due 2028
Debt Instrument [Line Items]
Interest rate percentage							0.80%
Long-term debt, gross	642.0	€ 600.0			664.0
Senior Notes \| 1.002% EIB Senior term loan due 2025
Debt Instrument [Line Items]
Interest rate percentage								1.002%
Long-term debt, gross	267.5				276.7			€ 250.0
Less current portion of long-term debt	(267.5)				0.0
Senior Notes \| Senior term loans due between 2025 and 2028
Debt Instrument [Line Items]
Long-term debt, gross	156.8	€ 146.5			162.1
Other long term debt
Debt Instrument [Line Items]
Long-term debt, gross	1.0				3.1
Less current portion of long-term debt	(1.0)				(2.3)
Revolving Credit Facility \| Line of Credit \| Credit facility, expires 2027
Debt Instrument [Line Items]
Long-term debt, gross	760.0				0.0
Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	500.0				0.0
Multi-Currency Finance Contract \| EIB Senior term loan due 2029
Debt Instrument [Line Items]
Interest rate percentage						3.98%
Long-term debt, gross	267.5				276.7
Multi-Currency Finance Contract \| EIB Senior term loan due 2030
Debt Instrument [Line Items]
Interest rate percentage				3.416%
Long-term debt, gross	$ 181.9				$ 0.0