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Business Segments and Geographic Information - Segment Information (Detail) (USD $)
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3 Months Ended |
6 Months Ended |
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Mar. 28, 2015
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Mar. 29, 2014
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Mar. 28, 2015
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Mar. 29, 2014
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Sep. 27, 2014
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| Segment Reporting Information [Line Items] |
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| Total revenues |
$ 655,500,000 |
$ 625,000,000 |
$ 1,308,300,000 |
$ 1,237,400,000 |
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| Operating income (loss) |
109,800,000 |
50,200,000 |
213,300,000 |
111,500,000 |
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| Depreciation and amortization |
126,600,000 |
130,000,000 |
248,600,000 |
257,900,000 |
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| Capital expenditures |
18,700,000 |
21,300,000 |
39,700,000 |
37,800,000 |
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| Identifiable assets |
8,031,800,000 |
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8,031,800,000 |
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8,414,700,000 |
| Diagnostics |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
296,700,000 |
290,800,000 |
600,800,000 |
576,500,000 |
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| Operating income (loss) |
27,100,000 |
15,200,000 |
55,300,000 |
20,000,000 |
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| Depreciation and amortization |
91,900,000 |
94,600,000 |
180,500,000 |
186,800,000 |
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| Capital expenditures |
11,400,000 |
14,800,000 |
26,200,000 |
25,100,000 |
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| Identifiable assets |
4,208,200,000 |
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4,208,200,000 |
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4,383,500,000 |
| Breast Health |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
255,500,000 |
238,700,000 |
497,500,000 |
465,200,000 |
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| Operating income (loss) |
75,400,000 |
25,800,000 |
135,900,000 |
69,700,000 |
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| Depreciation and amortization |
8,300,000 |
9,200,000 |
15,900,000 |
18,500,000 |
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| Capital expenditures |
3,000,000 |
2,300,000 |
5,500,000 |
4,100,000 |
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| Identifiable assets |
838,000,000 |
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838,000,000 |
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859,800,000 |
| GYN Surgical |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
79,100,000 |
72,000,000 |
163,500,000 |
150,900,000 |
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| Operating income (loss) |
4,500,000 |
6,600,000 |
17,700,000 |
17,700,000 |
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| Depreciation and amortization |
26,000,000 |
26,000,000 |
51,500,000 |
52,100,000 |
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| Capital expenditures |
2,400,000 |
2,200,000 |
4,400,000 |
4,000,000 |
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| Identifiable assets |
1,698,200,000 |
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1,698,200,000 |
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1,748,200,000 |
| Skeletal Health |
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| Segment Reporting Information [Line Items] |
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| Total revenues |
24,200,000 |
23,500,000 |
46,500,000 |
44,800,000 |
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| Operating income (loss) |
2,800,000 |
2,600,000 |
4,400,000 |
4,100,000 |
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| Depreciation and amortization |
400,000 |
200,000 |
700,000 |
500,000 |
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| Capital expenditures |
100,000 |
0 |
200,000 |
200,000 |
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| Identifiable assets |
24,000,000 |
|
24,000,000 |
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26,100,000 |
| Corporate |
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| Segment Reporting Information [Line Items] |
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| Capital expenditures |
1,800,000 |
2,000,000 |
3,400,000 |
4,400,000 |
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| Identifiable assets |
$ 1,263,400,000 |
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$ 1,263,400,000 |
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$ 1,397,100,000 |