v3.26.1
Business Segments (Revenue and Operating Profit by Segment) (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 04, 2026
USD ($)
Jun. 28, 2025
USD ($)
Jul. 04, 2026
USD ($)
Reportable_segment
Jun. 28, 2025
USD ($)
Jan. 03, 2026
USD ($)
Dec. 28, 2024
USD ($)
Segment Reporting Information [Line Items]            
Revenue $ 506.4 $ 474.2 $ 964.0 $ 886.5    
Cost of goods sold 271.1 250.2 510.9 466.4    
Operating Expenses 188.0 183.3 371.9 358.4    
Operating profit (loss) 47.3 40.7 81.2 61.7    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 40.8 33.6 68.4 48.1    
Depreciation and amortization     10.5 12.5    
Segment, Expenditure, Addition to Long-Lived Assets     4.1 11.0    
Total assets 1,706.7 1,815.1 1,706.7 1,815.1 $ 1,709.3  
Goodwill 429.9 432.6 $ 429.9 432.6 431.3 $ 424.6
Number of Reportable Segments | Reportable_segment     2      
Active Group            
Segment Reporting Information [Line Items]            
Revenue 388.4 355.5 $ 760.0 682.2    
Cost of goods sold 204.6 180.5 396.8 347.0    
Operating Expenses 112.6 110.3 225.6 212.4    
Operating profit (loss) 71.2 64.7 137.6 122.8    
Depreciation and amortization     3.0 3.1    
Segment, Expenditure, Addition to Long-Lived Assets     2.7 1.9    
Total assets 1,066.0 1,111.6 1,066.0 1,111.6 979.6  
Goodwill 320.0 322.2 320.0 322.2 321.3  
Work Group            
Segment Reporting Information [Line Items]            
Revenue 105.8 107.5 181.6 182.3    
Cost of goods sold 68.5 67.3 115.5 115.0    
Operating Expenses 20.6 19.9 42.8 39.9    
Operating profit (loss) 16.7 20.3 23.3 27.4    
Depreciation and amortization     0.1 0.2    
Segment, Expenditure, Addition to Long-Lived Assets     0.0 0.0    
Total assets 234.7 275.1 234.7 275.1 245.4  
Goodwill 60.9 61.4 60.9 61.4 61.1  
Other [Member]            
Segment Reporting Information [Line Items]            
Revenue 12.2 11.2 22.4 22.0    
Cost of goods sold 1.7 1.2 3.0 2.5    
Operating Expenses 2.0 1.9 3.9 3.9    
Operating profit (loss) 8.5 8.1 15.5 15.6    
Depreciation and amortization     0.6 0.6    
Segment, Expenditure, Addition to Long-Lived Assets     0.0 0.5    
Total assets 88.7 91.0 88.7 91.0 87.7  
Goodwill 49.0 49.0 49.0 49.0 48.9  
Corporate [Member]            
Segment Reporting Information [Line Items]            
Revenue 0.0 0.0 0.0 0.0    
Cost of goods sold (3.7) 1.2 (4.4) 1.9    
Operating Expenses 52.8 51.2 99.6 102.2    
Operating profit (loss) (49.1) (52.4) (95.2) (104.1)    
Depreciation and amortization     6.8 8.6    
Segment, Expenditure, Addition to Long-Lived Assets     1.4 8.6    
Total assets $ 317.3 $ 337.4 $ 317.3 $ 337.4 $ 396.6