Business Segments - Identifiable Assets (Details) - USD ($) $ in Millions	Jun. 29, 2025	Dec. 29, 2024
Segment Reporting Information [Line Items]
Identifiable assets	$ 15,135.2	$ 14,200.5
Operating Segments \| Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	11,095.1	10,942.4
Operating Segments \| Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,794.7	1,750.9
Operating Segments \| Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	1,525.0	576.2
Operating Segments \| Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	204.2	180.3
Corporate
Segment Reporting Information [Line Items]
Identifiable assets	$ 516.2	$ 750.7

Amount of asset recognized for present right to economic benefit.

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+ Details