v3.26.3
Business Segments - Schedule of Identifiable Assets (Details) - USD ($)
$ in Millions
Sep. 27, 2026
Dec. 28, 2025
Segment Reporting [Line Items]    
Total Teledyne identifiable assets $ 15,565.0 $ 15,285.3
Operating Segments    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 14,909.9 14,779.9
Operating Segments | Digital Imaging    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 11,286.8 11,303.3
Operating Segments | Instrumentation    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 1,884.5 1,794.3
Operating Segments | Aerospace and Defense Electronics    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 1,536.7 1,498.2
Operating Segments | Engineered Systems    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 201.9 184.1
Corporate    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets $ 655.1 $ 505.4