Business Segment Information - Information by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business segment information
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]		srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description		The chief operating decision maker uses segment operating income (loss) to assess the performance for each segment by comparing the results of each segment with one another, comparing actual results to budget and prior year, as well as to allocate resources.
Total segment revenue		$ 3,366.4	$ 2,964.5	$ 2,530.7
Operating expenses:
Selling, general and administrative		893.8	729.4	607.4
Research and development		376.5	294.8	235.9
Other charges, net		126.1	52.2	29.7
Operating Income		253.1	436.9	432.7
Interest and other income (expense), net		(46.2)	107.3	(18.8)
Income before income taxes, equity in income (losses) of unconsolidated investees, net of tax, and noncontrolling interests in consolidated subsidiaries		206.9	544.2	413.9
Assets		5,806.7	4,249.9
Capital Expenditures		115.3	106.9	129.2
Depreciation and Amortization		183.8	114.9	88.8
Operating segments
Business segment information
Total segment revenue		3,380.5	2,981.5	2,543.0
Operating expenses:
Cost of revenue		1,644.5	1,432.1	1,210.8
Selling, general and administrative		741.4	620.7	524.2
Research and development		372.8	294.5	235.4
Operating Income		621.8	634.2	572.6
Intersegment revenue
Business segment information
Total segment revenue		14.1	17.0	12.3
Corporate, eliminations and other
Operating expenses:
Operating Income	[1]	103.8	87.9	67.0
Assets	[2]	(41.5)	(46.7)
BSI BioSpin
Business segment information
Total segment revenue		905.7	798.5	696.7
Operating expenses:
Capital Expenditures		22.8	23.9	14.5
Depreciation and Amortization		41.0	25.7	22.6
BSI BioSpin | Operating segments
Business segment information
Total segment revenue		905.7	798.5	696.7
Operating expenses:
Cost of revenue		437.7	374.8	320.6
Selling, general and administrative		158.9	134.7	121.0
Research and development		92.5	77.8	67.4
Operating Income		216.6	211.2	187.7
BSI BioSpin | Intersegment revenue
Business segment information
Total segment revenue		0.0	0.0	0.0
BSI CALID
Business segment information
Total segment revenue		1,093.5	960.4	822.2
Operating expenses:
Capital Expenditures		34.1	31.4	33.9
Depreciation and Amortization		67.0	29.3	20.7
BSI CALID | Operating segments
Business segment information
Total segment revenue		1,093.5	960.4	822.2
Operating expenses:
Cost of revenue		465.4	393.2	330.8
Selling, general and administrative		270.2	238.7	200.0
Research and development		111.7	96.4	75.0
Operating Income		246.2	232.1	216.4
BSI CALID | Intersegment revenue
Business segment information
Total segment revenue		0.0	0.0	0.0
BSI Nano
Business segment information
Total segment revenue		1,098.3	941.9	787.0
Operating expenses:
Capital Expenditures		19.3	13.9	20.2
Depreciation and Amortization		61.7	48.0	35.6
BSI Nano | Operating segments
Business segment information
Total segment revenue		1,098.3	941.9	787.0
Operating expenses:
Cost of revenue		518.9	438.2	373.2
Selling, general and administrative		290.8	228.0	185.2
Research and development		164.7	117.3	90.5
Operating Income		123.9	158.4	138.1
BSI Nano | Intersegment revenue
Business segment information
Total segment revenue		0.0	0.0	0.0
BSI BioSpin, BSI CALID, BSI NANO & Corporate | Operating segments
Operating expenses:
Assets		5,648.4	4,110.6
BEST
Business segment information
Total segment revenue		268.9	263.7	224.8
Operating expenses:
Capital Expenditures		24.3	27.5	51.5
Depreciation and Amortization		8.4	7.2	6.0
BEST | Operating segments
Business segment information
Total segment revenue		283.0	280.7	237.1
Operating expenses:
Cost of revenue		222.5	225.9	186.2
Selling, general and administrative		21.5	19.3	18.0
Research and development		3.9	3.0	2.5
Operating Income		35.1	32.5	30.4
Assets		199.8	186.0
BEST | Intersegment revenue
Business segment information
Total segment revenue		14.1	17.0	12.3
Corporate
Operating expenses:
Capital Expenditures		14.8	10.2	9.1
Depreciation and Amortization		5.7	4.7	3.9
Unallocated Expenses
Operating expenses:
Operating Income	[3]	$ 264.9	$ 109.4	$ 72.9

[1] Represents corporate costs and intersegment eliminations not allocated to the reportable segments. Unallocated costs include general and administrative expenses not directly incurred by the segments such as professional fees incurred for the quarterly reviews and annual audit of the consolidated financial statements, personnel costs of corporate accounting, finance, legal and IT resources, and other expense items.

[2] Assets not allocated to the reportable segments and eliminations of intercompany transactions.

[3] Unallocated expenses consist of costs related to restructuring actions, acquisition and related integration expenses, amortization of acquired intangible assets, costs associated with our global information technology transition initiatives, and other costs