Quarterly report [Sections 13 or 15(d)]

Revenue Recognition - Schedule of Disaggregation of Revenue (Details)

v3.26.3
Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 03, 2026
Sep. 27, 2025
Oct. 03, 2026
Sep. 27, 2025
Disaggregation of Revenue [Line Items]        
Total revenues $ 213.1 $ 219.3 $ 669.3 $ 657.9
Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues 178.7 186.8 565.4 553.4
Janus International        
Disaggregation of Revenue [Line Items]        
Total revenues   28.3   77.9
Janus International | Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues   28.1   77.5
Operating Segments | Janus North America        
Disaggregation of Revenue [Line Items]        
Total revenues 183.4 191.8 582.2 582.8
Operating Segments | Janus North America | Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues 149.4 159.5 479.3 478.7
Operating Segments | Janus North America | Self storage - new construction        
Disaggregation of Revenue [Line Items]        
Total revenues 66.9 72.3 222.5 204.9
Operating Segments | Janus North America | Self storage - R3        
Disaggregation of Revenue [Line Items]        
Total revenues 50.0 54.0 161.9 162.0
Operating Segments | Janus North America | Commercial and other        
Disaggregation of Revenue [Line Items]        
Total revenues 66.5 65.5 197.8 215.9
Operating Segments | Janus International        
Disaggregation of Revenue [Line Items]        
Total revenues 30.0 28.3 88.4 77.9
Operating Segments | Janus International | Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues 29.6 28.1 87.4 77.5
Operating Segments | Janus International | Self storage - new construction        
Disaggregation of Revenue [Line Items]        
Total revenues 28.8 25.0 82.7 70.0
Operating Segments | Janus International | Self storage - R3        
Disaggregation of Revenue [Line Items]        
Total revenues 1.2 3.3 5.7 7.9
Intersegment eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues (0.3) (0.8) (1.3) (2.8)
Intersegment eliminations | Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues $ (0.3) $ (0.8) $ (1.3) $ (2.8)