Property, Plant and Equipment - Components of property, plant, and equipment, net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Land		$ 216.7	$ 202.4
Buildings		2,140.3	1,963.7
Leasehold improvements		143.5	137.8
Machinery and equipment		2,167.4	2,109.8
Computer software and hardware		1,093.5	1,070.5
Furniture and fixtures		62.1	59.5
Construction in progress		163.1	308.4
Total cost		5,986.6	5,852.1
Less: accumulated depreciation		(2,931.2)	(2,670.8)
Total property, plant and equipment, net		$ 3,055.4	$ 3,181.3
Solothurn, Switzerland
Property, Plant and Equipment [Line Items]
Property, plant and equipment, additions	$ 717.3