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Restructuring and Divestiture Charges - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended
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Sep. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Dec. 28, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Sep. 29, 2012 | Sep. 29, 2012 Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Restructuring Charges [Member] | Mar. 24, 2012 Adiana Permanent Contraception System [Member] | Mar. 24, 2012 Adiana Permanent Contraception System [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Adiana Permanent Contraception System [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Adiana Permanent Contraception System [Member] Restructuring Charges [Member] | Mar. 30, 2013 Consolidation of Diagnostics Operations [Member] | Sep. 27, 2014 Consolidation of Diagnostics Operations [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 27, 2014 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 28, 2013 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 28, 2013 Consolidation of Diagnostics Operations [Member] Restructuring Charges [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Restructuring Charges [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Restructuring Charges [Member] | Sep. 27, 2014 Closure of Indianapolis Facility [Member] | Sep. 28, 2013 Closure of Indianapolis Facility [Member] Indiana [Member ] | Sep. 29, 2012 Closure of Indianapolis Facility [Member] Indiana [Member ] | Dec. 28, 2013 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] | Sep. 27, 2014 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] | Sep. 28, 2013 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] | Sep. 29, 2012 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] | Sep. 29, 2012 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Closure of Indianapolis Facility [Member] Restructuring Charges [Member] | Dec. 28, 2013 Fiscal 2014 Actions [Member] | Sep. 27, 2014 Fiscal 2014 Actions [Member] | Dec. 28, 2013 Fiscal 2014 Actions [Member] Jack Cumming [Member] | Sep. 29, 2012 Fiscal 2014 Actions [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Fiscal 2014 Actions [Member] Restructuring Charges [Member] | Sep. 28, 2013 Fiscal 2013 Actions [Member] | Jun. 29, 2013 Fiscal 2013 Actions [Member] | Sep. 27, 2014 Fiscal 2013 Actions [Member] | Sep. 29, 2012 Fiscal 2013 Actions [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Fiscal 2013 Actions [Member] Restructuring Charges [Member] | Dec. 28, 2013 Other Operating Cost Reductions [Member] employee | Sep. 27, 2014 Other Operating Cost Reductions [Member] | Sep. 29, 2012 Other Operating Cost Reductions [Member] Restructuring Charges [Member] Fiscal 2012 Charges [Member] | Sep. 29, 2012 Other Operating Cost Reductions [Member] Restructuring Charges [Member] | Sep. 28, 2013 One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and divestiture charges | $ 15,100,000 | $ 6,700,000 | $ 11,600,000 | $ 18,400,000 | $ 9,700,000 | $ 6,700,000 | $ 12,500,000 | $ 51,700,000 | $ 32,800,000 | $ 17,500,000 | $ 36,500,000 |  |  | $ 18,300,000 | $ 19,500,000 |  |  |  |  |  |  |  |  |  | $ 14,800,000 |  |  |  |  |  |  |  |  | $ 1,800,000 |  |  |  |  | $ 0 |  |  |  |  | $ 0 |  |  |  | $ 400,000 |  |
Severance charges |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  | 0 |  | 900,000 | 3,000,000 | 3,200,000 | 10,800,000 | 13,300,000 |  |  | 5,900,000 |  |  |  | 200,000 | 4,800,000 | 900,000 |  |  | 6,300,000 | 16,600,000 | 6,600,000 |  |  | 6,800,000 | 4,600,000 | 900,000 |  |  |  | 8,700,000 |  |  | 1,100,000
Compensation charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,500,000 |  |  |  | 6,300,000 |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 | 1,800,000 | 4,400,000 |  |  | 1,400,000 |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost Remaining |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Employee retention program, payments in cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated aggregate severance charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |  |  |  | 9,100,000 |  |  |
Exiting charges |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  | 800,000 | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of employees affected for severance benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95 |  |  |  |
Impairment charges of equipment fair value |  |  |  | 3,100,000 |  |  |  |  | 5,000,000 | 6,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,100,000 |  |  |  |
Impairment charge |  |  | 28,600,000 |  | 700,000 |  |  |  | 3,700,000 | 6,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, sales value |  |  |  | 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring charges |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, inventory and certain equipment |  |  |  |  | 2,400,000 |  |  |  | 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, goodwill |  |  |  |  | 600,000 |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on sale of business | 5,300,000 |  |  |  |  |  | 900,000 | (5,500,000) | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposition charge |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges Included In Cost Of Sales |  |  |  |  |  |  |  |  |  |  |  | 19,000,000 |  |  | 19,000,000 | 19,000,000 |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  | 0 |  |  |  |  | 0 |  |  |  | 0 |
Restructuring Charges And Associated Cost |  |  |  |  |  |  |  |  |  |  |  | 17,500,000 |  |  | 500,000 | 500,000 |  |  |  |  |  |  |  |  |  | 14,800,000 |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  |  | 0 |  |  |  |  | 0 |  |  |  | 400,000 |
Impairment Charges Related To Inventory |  |  |  |  |  |  |  |  |  | 9,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment Charges Related To Manufacturing Equipment |  |  |  |  |  |  |  |  |  | 6,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charges Related To Outstanding Contractual Obligations |  |  |  |  |  |  |  |  |  | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration