Business Segments - Identifiable Assets (Details) - USD ($) $ in Millions	Jul. 02, 2023	Jan. 01, 2023
Segment Reporting Information [Line Items]
Identifiable assets	$ 14,156.3	$ 14,354.0
Operating segments | Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	11,341.3	11,432.3
Operating segments | Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,637.8	1,626.4
Operating segments | Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	568.6	540.1
Operating segments | Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	215.9	200.3
Corporate expense
Segment Reporting Information [Line Items]
Identifiable assets	$ 392.7	$ 554.9