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Business Segments and Geographic Information - Segment Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 25, 2021 | Sep. 26, 2020 | Sep. 28, 2019
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 5,632.3 | $ 3,776.4 | $ 3,367.3
Operating income | 2,480.3 | 1,105.0 | (123.8)
Depreciation and amortization | 406.9 | 376.0 | 463.1
Capital expenditures | 156.2 | 156.4 | 109.1
Identifiable assets | 8,919.9 | 7,195.8 | 6,442.1
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1.0 | 3.8 | 7.7
Identifiable assets | 2,935.6 | 2,355.9 | 1,522.5
Diagnostics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 3,695.0 | 2,102.1 | 1,205.5
Operating income | 2,140.1 | 929.7 | 163.1
Depreciation and amortization | 260.4 | 237.3 | 246.6
Capital expenditures | 126.2 | 110.7 | 59.2
Identifiable assets | 3,348.8 | 2,161.4 | 2,276.6
Breast Health |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,352.3 | 1,151.9 | 1,314.2
Operating income | 284.2 | 192.8 | 399.3
Depreciation and amortization | 52.7 | 48.8 | 36.8
Capital expenditures | 14.2 | 22.4 | 18.3
Identifiable assets | 1,233.9 | 1,200.9 | 1,127.8
Gyn Surgical [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 488.1 | 376.1 | 437.2
Operating income | 58.9 | 42.0 | 99.2
Depreciation and amortization | 93.1 | 85.1 | 87.7
Capital expenditures | 14.5 | 17.9 | 15.7
Identifiable assets | 1,369.7 | 1,438.7 | 1,328.6
Skeletal Health |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 96.9 | 81.0 | 94.8
Operating income | (2.9) | (2.4) | (4.2)
Depreciation and amortization | 0.7 | 0.7 | 0.6
Capital expenditures | 0.3 | 0.2 | 1.2
Identifiable assets | 31.9 | 38.9 | 27.3
Medical Aesthetics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0.0 | 65.3 | 315.6
Operating income | 0.0 | (57.1) | (781.2)
Depreciation and amortization | 0.0 | 4.1 | 91.4
Capital expenditures | 0.0 | 1.4 | 7.0
Identifiable assets | $ 0.0 | $ 0.0 | $ 159.3

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