Quarterly report [Sections 13 or 15(d)]

Revenue Recognition - Schedule of Disaggregation of Revenue (Details)

v3.25.3
Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 27, 2025
Sep. 28, 2024
Disaggregation of Revenue [Line Items]        
Total revenue $ 219.3 $ 230.1 $ 657.9 $ 733.0
Product revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 174.2 175.9 518.6 596.8
Service revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 45.1 54.2 139.3 136.2
Operating Segments | Janus North America        
Disaggregation of Revenue [Line Items]        
Total revenue 191.8 209.1 582.8 680.3
Operating Segments | Janus North America | Product revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 159.5 164.5 478.7 566.7
Operating Segments | Janus North America | Service revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 32.3 44.6 104.1 113.6
Operating Segments | Janus North America | Self storage - new construction        
Disaggregation of Revenue [Line Items]        
Total revenue 72.3 74.0 204.9 273.7
Operating Segments | Janus North America | Self storage - R3        
Disaggregation of Revenue [Line Items]        
Total revenue 54.0 53.8 162.0 180.8
Operating Segments | Janus North America | Commercial and Others        
Disaggregation of Revenue [Line Items]        
Total revenue 65.5 81.3 215.9 225.8
Operating Segments | Janus North America | Product revenues transferred at a point in time | Product revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 143.6 141.9 436.8 484.8
Operating Segments | Janus North America | Service revenues transferred over time | Product revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 15.9 22.6 41.9 81.9
Operating Segments | Janus North America | Service revenues transferred over time | Service revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 32.3 44.6 104.1 113.6
Operating Segments | Janus International        
Disaggregation of Revenue [Line Items]        
Total revenue 28.3 21.3 77.9 54.1
Operating Segments | Janus International | Product revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 15.5 11.8 42.7 31.5
Operating Segments | Janus International | Service revenues        
Disaggregation of Revenue [Line Items]        
Total revenue 12.8 9.5 35.2 22.6
Operating Segments | Janus International | Self storage - new construction        
Disaggregation of Revenue [Line Items]        
Total revenue 25.0 18.2 70.0 45.8
Operating Segments | Janus International | Self storage - R3        
Disaggregation of Revenue [Line Items]        
Total revenue 3.3 3.1 7.9 8.3
Operating Segments | Janus International | Product revenues transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Total revenue 15.5 11.8 42.7 31.5
Operating Segments | Janus International | Service revenues transferred over time        
Disaggregation of Revenue [Line Items]        
Total revenue 12.8 9.5 35.2 22.6
Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenue $ (0.8) $ (0.3) $ (2.8) $ (1.4)