v3.25.2
Business Segments and Geographic Information - Segment Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 28, 2025
Jun. 29, 2024
Jun. 28, 2025
Jun. 29, 2024
Sep. 28, 2024
Segment Reporting Information [Line Items]          
Total revenues $ 1,023.8 $ 1,011.4 $ 3,050.9 $ 3,042.3  
Income (loss) from operations 254.6 244.0 477.4 652.6  
Depreciation and amortization 70.2 72.3 220.3 234.4  
Capital expenditures 34.9 33.9 106.6 99.9  
Identifiable assets 8,806.1   8,806.1   $ 9,156.0
Diagnostics          
Segment Reporting Information [Line Items]          
Total revenues 448.9 440.8 1,373.1 1,338.7  
Breast Health          
Segment Reporting Information [Line Items]          
Total revenues 365.2 385.0 1,090.4 1,147.3  
GYN Surgical          
Segment Reporting Information [Line Items]          
Total revenues 178.4 166.6 507.3 484.8  
Skeletal Health          
Segment Reporting Information [Line Items]          
Total revenues 31.3 19.0 80.1 71.5  
Operating Segments | Diagnostics          
Segment Reporting Information [Line Items]          
Total revenues 448.9 440.8 1,373.1 1,338.7  
Income (loss) from operations 111.1 89.7 249.5 210.1  
Depreciation and amortization 46.7 51.0 143.8 168.3  
Capital expenditures 22.6 17.7 67.1 61.7  
Identifiable assets 2,291.8   2,291.8   2,431.3
Operating Segments | Breast Health          
Segment Reporting Information [Line Items]          
Total revenues 365.2 385.0 1,090.4 1,147.3  
Income (loss) from operations 99.6 102.4 262.8 296.2  
Depreciation and amortization 13.0 9.3 38.2 29.6  
Capital expenditures 3.5 10.4 15.3 25.1  
Identifiable assets 1,572.8   1,572.8   1,588.9
Operating Segments | GYN Surgical          
Segment Reporting Information [Line Items]          
Total revenues 178.4 166.6 507.3 484.8  
Income (loss) from operations 48.8 56.7 (29.3) 144.3  
Depreciation and amortization 10.3 11.9 37.7 36.1  
Capital expenditures 7.5 4.8 20.3 11.5  
Identifiable assets 1,652.1   1,652.1   1,419.9
Operating Segments | Skeletal Health          
Segment Reporting Information [Line Items]          
Total revenues 31.3 19.0 80.1 71.5  
Income (loss) from operations (4.9) (4.8) (5.6) 2.0  
Depreciation and amortization 0.2 0.1 0.6 0.4  
Capital expenditures 0.0 0.7 0.0 1.1  
Identifiable assets 35.5   35.5   48.3
Corporate          
Segment Reporting Information [Line Items]          
Capital expenditures 1.3 $ 0.3 3.9 $ 0.5  
Identifiable assets $ 3,253.9   $ 3,253.9   $ 3,667.6