Annual report [Section 13 and 15(d), not S-K Item 405]

Revenue Recognition - Schedule of Disaggregation of Revenue (Details)

v3.25.4
Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 03, 2026
Dec. 28, 2024
Dec. 30, 2023
Disaggregation of Revenue [Line Items]      
Total revenues $ 884.2 $ 963.8 $ 1,066.4
Product revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 686.9 779.4 909.8
Service revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 197.3 184.4 156.6
Operating Segments | Janus North America      
Disaggregation of Revenue [Line Items]      
Total revenues 783.6 892.6 985.7
Operating Segments | Janus North America | Product revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 633.6 738.6 865.1
Operating Segments | Janus North America | Service revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 150.0 154.0 120.6
Operating Segments | Janus North America | Self storage - new construction      
Disaggregation of Revenue [Line Items]      
Total revenues 271.4 354.0 321.7
Operating Segments | Janus North America | Self storage - R3      
Disaggregation of Revenue [Line Items]      
Total revenues 222.4 234.3 325.8
Operating Segments | Janus North America | Commercial and Others      
Disaggregation of Revenue [Line Items]      
Total revenues 289.8 304.3 338.2
Operating Segments | Janus International      
Disaggregation of Revenue [Line Items]      
Total revenues 103.9 73.6 82.3
Operating Segments | Janus International | Product revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 56.6 43.2 46.3
Operating Segments | Janus International | Service revenues      
Disaggregation of Revenue [Line Items]      
Total revenues 47.3 30.4 36.0
Operating Segments | Janus International | Self storage - new construction      
Disaggregation of Revenue [Line Items]      
Total revenues 92.6 62.2 73.2
Operating Segments | Janus International | Self storage - R3      
Disaggregation of Revenue [Line Items]      
Total revenues 11.3 11.4 9.1
Intersegment eliminations      
Disaggregation of Revenue [Line Items]      
Total revenues (3.3) (2.4) (1.6)
Intersegment eliminations | Product revenues      
Disaggregation of Revenue [Line Items]      
Total revenues $ (3.3) $ (2.4) $ (1.6)