Business Segments - Identifiable Assets (Details) - USD ($) $ in Millions	Oct. 01, 2023	Jan. 01, 2023
Segment Reporting Information [Line Items]
Identifiable assets	$ 14,215.8	$ 14,354.0
Operating segments | Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	11,267.8	11,432.3
Operating segments | Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,643.1	1,626.4
Operating segments | Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	570.9	540.1
Operating segments | Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	210.7	200.3
Corporate expense
Segment Reporting Information [Line Items]
Identifiable assets	$ 523.3	$ 554.9