Business Segments - Identifiable Assets (Details) - USD ($) $ in Millions	Apr. 02, 2023	Jan. 01, 2023
Segment Reporting Information [Line Items]
Identifiable assets	$ 14,429.3	$ 14,354.0
Operating segments | Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	11,406.6	11,432.3
Operating segments | Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,634.6	1,626.4
Operating segments | Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	554.5	540.1
Operating segments | Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	188.3	200.3
Corporate expense
Segment Reporting Information [Line Items]
Identifiable assets	$ 645.3	$ 554.9