v3.25.1
Business Segments and Geographic Information - Segment Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 29, 2025
Mar. 30, 2024
Mar. 29, 2025
Mar. 30, 2024
Sep. 28, 2024
Segment Reporting Information [Line Items]          
Total revenues $ 1,005.3 $ 1,017.8 $ 2,027.1 $ 2,030.9  
Income (loss) from operations (7.0) 210.4 222.8 408.6  
Depreciation and amortization 76.2 73.7 150.2 162.1  
Capital expenditures 40.3 28.0 71.8 66.0  
Identifiable assets 8,545.1   8,545.1   $ 9,156.0
Diagnostics          
Segment Reporting Information [Line Items]          
Total revenues 453.6 450.1 924.2 897.9  
Income (loss) from operations 19.5 71.1 138.4 120.5  
Depreciation and amortization 48.5 51.5 97.1 117.4  
Capital expenditures 26.7 19.8 44.5 44.0  
Identifiable assets 2,301.5   2,301.5   2,431.3
Breast Health          
Segment Reporting Information [Line Items]          
Total revenues 356.2 384.6 725.2 762.3  
Income (loss) from operations 95.7 91.7 163.2 193.8  
Depreciation and amortization 12.1 10.0 25.3 20.3  
Capital expenditures 3.0 5.4 11.8 14.7  
Identifiable assets 1,565.2   1,565.2   1,588.9
GYN Surgical          
Segment Reporting Information [Line Items]          
Total revenues 162.5 156.0 328.9 318.2  
Income (loss) from operations (124.7) 44.3 (78.1) 87.6  
Depreciation and amortization 15.4 12.1 27.4 24.1  
Capital expenditures 9.2 2.5 12.9 6.7  
Identifiable assets 1,649.3   1,649.3   1,419.9
Skeletal Health          
Segment Reporting Information [Line Items]          
Total revenues 33.0 27.1 48.8 52.5  
Income (loss) from operations 2.5 3.3 (0.7) 6.7  
Depreciation and amortization 0.2 0.1 0.4 0.3  
Capital expenditures 0.0 0.3 0.0 0.4  
Identifiable assets 36.6   36.6   48.3
Corporate          
Segment Reporting Information [Line Items]          
Capital expenditures 1.4 $ 0.0 2.6 $ 0.2  
Identifiable assets $ 2,992.5   $ 2,992.5   $ 3,667.6