Business Segments - Identifiable Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Identifiable assets	$ 14,221.1	$ 14,527.9
Operating segments | Digital Imaging
Segment Reporting Information [Line Items]
Identifiable assets	11,236.1	11,382.2
Operating segments | Instrumentation
Segment Reporting Information [Line Items]
Identifiable assets	1,734.6	1,692.3
Operating segments | Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Identifiable assets	560.4	569.1
Operating segments | Engineered Systems
Segment Reporting Information [Line Items]
Identifiable assets	208.3	184.8
Corporate expense
Segment Reporting Information [Line Items]
Identifiable assets	$ 481.7	$ 699.5