v3.26.3
Business Segments (Revenue and Operating Profit by Segment) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2026
USD ($)
Sep. 27, 2025
USD ($)
Oct. 03, 2026
USD ($)
Reportable_segment
Sep. 27, 2025
USD ($)
Jan. 03, 2026
USD ($)
Dec. 28, 2024
USD ($)
Segment Reporting [Line Items]            
Revenue $ 505.4 $ 470.3 $ 1,469.4 $ 1,356.8    
Cost of goods sold 229.3 247.1 740.2 713.5    
Operating Expenses 186.4 183.6 558.3 542.0    
Operating profit (loss) 89.7 39.6 170.9 101.3    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 84.7 33.1 153.1 81.2    
Depreciation and amortization     15.8 20.3    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     7.7 13.9    
Total assets 1,677.3 1,706.6 1,677.3 1,706.6 $ 1,709.3  
Goodwill 429.0 430.7 $ 429.0 430.7 431.3 $ 424.6
Number of Reportable Segments | Reportable_segment     2      
Active Group            
Segment Reporting [Line Items]            
Revenue 387.8 352.8 $ 1,147.8 1,035.0    
Cost of goods sold 193.3 180.1 590.1 527.1    
Operating Expenses 114.8 107.3 340.4 319.7    
Operating profit (loss) 79.7 65.4 217.3 188.2    
Depreciation and amortization     4.5 4.8    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     5.0 2.1    
Total assets 1,046.6 1,075.8 1,046.6 1,075.8 979.6  
Goodwill 319.2 320.7 319.2 320.7 321.3  
Work Group            
Segment Reporting [Line Items]            
Revenue 106.9 105.9 288.5 288.2    
Cost of goods sold 66.0 64.3 181.5 179.3    
Operating Expenses 21.3 21.8 64.1 61.7    
Operating profit (loss) 19.6 19.8 42.9 47.2    
Depreciation and amortization     0.1 0.3    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     0.0 0.0    
Total assets 240.7 248.5 240.7 248.5 245.4  
Goodwill 60.8 60.9 60.8 60.9 61.1  
Other [Member]            
Segment Reporting [Line Items]            
Revenue 10.7 11.6 33.1 33.6    
Cost of goods sold 1.4 1.5 4.4 4.0    
Operating Expenses 2.1 2.4 6.0 6.3    
Operating profit (loss) 7.2 7.7 22.7 23.3    
Depreciation and amortization     0.8 1.0    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     0.0 0.2    
Total assets 88.9 87.0 88.9 87.0 87.7  
Goodwill 49.0 49.1 49.0 49.1 48.9  
Corporate [Member]            
Segment Reporting [Line Items]            
Revenue 0.0 0.0 0.0 0.0    
Cost of goods sold (31.4) 1.2 (35.8) 3.1    
Operating Expenses 48.2 52.1 147.8 154.3    
Operating profit (loss) (16.8) (53.3) (112.0) (157.4)    
Depreciation and amortization     10.4 14.2    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     2.7 11.6    
Total assets $ 301.1 $ 295.3 $ 301.1 $ 295.3 $ 396.6