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Business Segments - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 29, 2024 USD ($) product_line segment	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Restructuring charges	$ 15.6	$ 12.0
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense
Restructuring benefit			$ 0.5
Remains to be paid	$ 2.4
Costs related to headcount or facility consolidation			3.5
Income related to favorable resolution of facility consolidation			$ 4.0
Instrumentation
Segment Reporting Information [Line Items]
Number of product lines | product_line	3
Digital Imaging
Segment Reporting Information [Line Items]
Number of product lines | product_line	1
Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Number of product lines | product_line	1
Engineered Systems
Segment Reporting Information [Line Items]
Number of product lines | product_line	1

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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