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Business Segments and Geographic Information - Segment Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Sep. 24, 2016 | Jun. 25, 2016 | Mar. 26, 2016 | Dec. 26, 2015 | Sep. 30, 2017 | Sep. 24, 2016 | Sep. 26, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 802.9 | $ 806.1 | $ 715.4 | $ 734.4 | $ 726.8 | $ 717.4 | $ 693.3 | $ 695.2 | $ 3,058.8 | $ 2,832.7 | $ 2,705.0
Operating income |  |  |  |  |  |  |  |  | 1,370.2 | 548.6 | 455.1
Depreciation and amortization |  |  |  |  |  |  |  |  | 449.2 | 465.4 | 491.4
Capital expenditures |  |  |  |  |  |  |  |  | 107.6 | 94.5 | 89.4
Identifiable assets | 7,979.6 |  |  |  | 7,317.0 |  |  |  | 7,979.6 | 7,317.0 | 7,642.5
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 21.0 | 12.3 | 11.1
Identifiable assets | 1,262.7 |  |  |  | 1,134.4 |  |  |  | 1,262.7 | 1,134.4 | 1,087.9
Diagnostics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 1,197.1 | 1,236.9 | 1,211.8
Operating income |  |  |  |  |  |  |  |  | 1,054.2 | 126.0 | 109.5
Depreciation and amortization |  |  |  |  |  |  |  |  | 278.9 | 341.8 | 358.7
Capital expenditures |  |  |  |  |  |  |  |  | 50.9 | 53.5 | 55.6
Identifiable assets | 2,621.6 |  |  |  | 3,771.9 |  |  |  | 2,621.6 | 3,771.9 | 4,055.8
Breast Health |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 1,138.3 | 1,112.8 | 1,063.4
Operating income |  |  |  |  |  |  |  |  | 373.4 | 350.5 | 296.3
Depreciation and amortization |  |  |  |  |  |  |  |  | 19.7 | 22.6 | 28.6
Capital expenditures |  |  |  |  |  |  |  |  | 12.0 | 10.6 | 12.8
Identifiable assets | 824.0 |  |  |  | 809.1 |  |  |  | 824.0 | 809.1 | 815.4
Medical Aesthetics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 207.5 | 0.0 | 0.0
Operating income |  |  |  |  |  |  |  |  | (115.9) | 0.0 | 0.0
Depreciation and amortization |  |  |  |  |  |  |  |  | 54.2 | 0.0 | 0.0
Capital expenditures |  |  |  |  |  |  |  |  | 7.3 | 0.0 | 0.0
Identifiable assets | 1,751.2 |  |  |  | 0.0 |  |  |  | 1,751.2 | 0.0 | 0.0
GYN Surgical |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 427.1 | 393.1 | 335.8
Operating income |  |  |  |  |  |  |  |  | 65.0 | 69.1 | 38.6
Depreciation and amortization |  |  |  |  |  |  |  |  | 95.7 | 99.9 | 102.7
Capital expenditures |  |  |  |  |  |  |  |  | 15.2 | 17.7 | 9.5
Identifiable assets | 1,494.6 |  |  |  | 1,570.7 |  |  |  | 1,494.6 | 1,570.7 | 1,658.1
Skeletal Health |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 88.8 | 89.9 | 94.0
Operating income |  |  |  |  |  |  |  |  | (6.5) | 3.0 | 10.7
Depreciation and amortization |  |  |  |  |  |  |  |  | 0.7 | 1.1 | 1.4
Capital expenditures |  |  |  |  |  |  |  |  | 1.2 | 0.4 | 0.4
Identifiable assets | $ 25.5 |  |  |  | $ 30.9 |  |  |  | $ 25.5 | $ 30.9 | $ 25.3

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