v3.26.1
Business Segments - Schedule of Identifiable Assets (Details) - USD ($)
$ in Millions
Jun. 28, 2026
Dec. 28, 2025
Segment Reporting [Line Items]    
Total Teledyne identifiable assets $ 15,280.4 $ 15,285.3
Operating Segments    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 14,859.5 14,779.9
Operating Segments | Digital Imaging    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 11,282.4 11,303.3
Operating Segments | Instrumentation    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 1,859.1 1,794.3
Operating Segments | Aerospace and Defense Electronics    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 1,512.8 1,498.2
Operating Segments | Engineered Systems    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets 205.2 184.1
Corporate    
Segment Reporting [Line Items]    
Total Teledyne identifiable assets $ 420.9 $ 505.4