Acquisitions - Schedule of Components and Fair Value Allocation of the Consideration Transferred in Connection with Acquisitions (Details) SFr in Millions, $ in Millions							3 Months Ended
	Mar. 06, 2024 USD ($)	Mar. 06, 2024 CHF (SFr)	Feb. 01, 2024 USD ($)	Jan. 02, 2024 USD ($)	Jan. 03, 2023 USD ($)	Jan. 03, 2023 CHF (SFr)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)
Consideration Transferred:
Cash paid							$ 281.6
Cash acquired							(8.2)
Fair value of contingent consideration							13.4
Working capital adjustment							1.8
Total consideration transferred, net of cash acquired							41.9	$ 26.7
Allocation of Consideration Transferred:
Accounts receivable							9.0
Inventories							63.8
Other current assets							2.5
Property, plant and equipment							2.7
Other assets							27.1
Goodwill							751.9		$ 582.6	$ 751.9
Liabilities assumed							(143.5)
Total consideration allocated							288.6
Operating segments
Consideration Transferred:
Total consideration transferred, net of cash acquired							288.6
Allocation of Consideration Transferred:
Goodwill							183.1
Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets							63.3
Customer Relationships
Allocation of Consideration Transferred:
Intangible assets							60.2
Backlog
Allocation of Consideration Transferred:
Intangible assets							13.3
Trade Name
Allocation of Consideration Transferred:
Intangible assets							7.1
Chemspeed Technologies AG
Consideration Transferred:
Total consideration transferred, net of cash acquired	$ 175.4	SFr 154.7
Chemspeed Technologies AG | BSI BBIO
Consideration Transferred:
Cash paid							175.4
Cash acquired							(0.6)
Fair value of contingent consideration							0.0
Working capital adjustment							0.0
Total consideration transferred, net of cash acquired							174.8
Allocation of Consideration Transferred:
Accounts receivable							6.1
Inventories							34.4
Other current assets							1.4
Property, plant and equipment							1.8
Other assets							17.3
Goodwill							118.7
Liabilities assumed							(102.4)
Total consideration allocated							174.8
Chemspeed Technologies AG | BSI BBIO | Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets							29.7
Chemspeed Technologies AG | BSI BBIO | Customer Relationships
Allocation of Consideration Transferred:
Intangible assets							54.5
Chemspeed Technologies AG | BSI BBIO | Backlog
Allocation of Consideration Transferred:
Intangible assets							8.4
Chemspeed Technologies AG | BSI BBIO | Trade Name
Allocation of Consideration Transferred:
Intangible assets							4.9
Nanophoton Corporation
Consideration Transferred:
Total consideration transferred, net of cash acquired							13.3
Spectral Instruments Imaging, LLC
Consideration Transferred:
Total consideration transferred, net of cash acquired			$ 29.0
Spectral Instruments Imaging, LLC | BSI BBIO
Consideration Transferred:
Cash paid							29.0
Cash acquired							(1.5)
Fair value of contingent consideration							0.9
Working capital adjustment							0.9
Total consideration transferred, net of cash acquired							29.3
Allocation of Consideration Transferred:
Accounts receivable							1.5
Inventories							3.4
Other current assets							0.0
Property, plant and equipment							0.0
Other assets							0.9
Goodwill							14.1
Liabilities assumed							(2.4)
Total consideration allocated							29.3
Spectral Instruments Imaging, LLC | BSI BBIO | Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets							9.0
Spectral Instruments Imaging, LLC | BSI BBIO | Customer Relationships
Allocation of Consideration Transferred:
Intangible assets							2.5
Spectral Instruments Imaging, LLC | BSI BBIO | Backlog
Allocation of Consideration Transferred:
Intangible assets							0.0
Spectral Instruments Imaging, LLC | BSI BBIO | Trade Name
Allocation of Consideration Transferred:
Intangible assets							0.3
Nion LLC [Member]
Consideration Transferred:
Total consideration transferred, net of cash acquired				$ 37.4
Nion LLC [Member] | BSI NANO
Consideration Transferred:
Cash paid							37.4
Cash acquired							(5.0)
Fair value of contingent consideration							10.5
Working capital adjustment							(0.3)
Total consideration transferred, net of cash acquired							42.6
Allocation of Consideration Transferred:
Accounts receivable							0.3
Inventories							23.2
Other current assets							0.0
Property, plant and equipment							0.5
Other assets							2.2
Goodwill							27.1
Liabilities assumed							(28.5)
Total consideration allocated							42.6
Nion LLC [Member] | BSI NANO | Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets							9.2
Nion LLC [Member] | BSI NANO | Customer Relationships
Allocation of Consideration Transferred:
Intangible assets							2.6
Nion LLC [Member] | BSI NANO | Backlog
Allocation of Consideration Transferred:
Intangible assets							4.9
Nion LLC [Member] | BSI NANO | Trade Name
Allocation of Consideration Transferred:
Intangible assets							1.1
Other | Various
Consideration Transferred:
Cash paid							39.8
Cash acquired							(1.1)
Fair value of contingent consideration							2.0
Working capital adjustment							1.2
Total consideration transferred, net of cash acquired							41.9
Allocation of Consideration Transferred:
Accounts receivable							1.1
Inventories							2.8
Other current assets							1.1
Property, plant and equipment							0.4
Other assets							6.7
Goodwill							23.2
Liabilities assumed							(10.2)
Total consideration allocated							41.9
Other | Various | Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets							15.4
Other | Various | Customer Relationships
Allocation of Consideration Transferred:
Intangible assets							0.6
Other | Various | Backlog
Allocation of Consideration Transferred:
Intangible assets							0.0
Other | Various | Trade Name
Allocation of Consideration Transferred:
Intangible assets							0.8
Tornado Spectral Systems, Inc.
Consideration Transferred:
Total consideration transferred, net of cash acquired							$ 22.3
Biognosys, AG
Consideration Transferred:
Fair value of contingent consideration					$ 6.3	SFr 5.9
Total consideration transferred, net of cash acquired					$ 80.1	SFr 75.0
Biognosys, AG | Bruker CALID
Consideration Transferred:
Cash paid								73.6
Cash acquired								(9.5)
Holdback								0.2
Fair value of redeemable noncontrolling interest								2.5
Total consideration transferred, net of cash acquired								66.8
Allocation of Consideration Transferred:
Accounts receivable								3.6
Inventories								0.4
Other current assets								0.9
Property, plant and equipment								8.0
Other assets								4.3
Goodwill								47.5
Liabilities assumed								(25.4)
Total consideration allocated								66.8
Biognosys, AG | Bruker CALID | Existing Technology And Related Patents
Allocation of Consideration Transferred:
Intangible assets								10.2
Biognosys, AG | Bruker CALID | Customer Relationships
Allocation of Consideration Transferred:
Intangible assets								13.8
Biognosys, AG | Bruker CALID | Backlog
Allocation of Consideration Transferred:
Intangible assets								0.8
Biognosys, AG | Bruker CALID | Trade Name
Allocation of Consideration Transferred:
Intangible assets								$ 2.7