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Restructuring and Divestiture Charges - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended
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Mar. 29, 2014 | Dec. 28, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Mar. 29, 2014 | Sep. 28, 2013 | Sep. 28, 2013 Indiana [Member ] | Sep. 29, 2012 Indiana [Member ] | Mar. 30, 2013 Consolidation of Diagnostics Operations [Member] | Mar. 29, 2014 Consolidation of Diagnostics Operations [Member] | Mar. 30, 2013 Consolidation of Diagnostics Operations [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] | Mar. 29, 2014 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Mar. 30, 2013 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Mar. 29, 2014 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Mar. 30, 2013 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 28, 2013 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Molecular Diagnostics Operations [Member] | Sep. 28, 2013 Consolidation of Diagnostics Operations [Member] Restructuring [Member] | Mar. 24, 2012 One-time Termination Benefits [Member] | Sep. 28, 2013 One-time Termination Benefits [Member] | Dec. 28, 2013 Closure of Indianapolis Facility [Member] | Mar. 30, 2013 Closure of Indianapolis Facility [Member] | Mar. 29, 2014 Closure of Indianapolis Facility [Member] | Mar. 30, 2013 Closure of Indianapolis Facility [Member] | Sep. 29, 2012 Closure of Indianapolis Facility [Member] | Dec. 28, 2013 Closure of Indianapolis Facility [Member] Restructuring [Member] | Sep. 28, 2013 Closure of Indianapolis Facility [Member] Restructuring [Member] | Dec. 28, 2013 Fiscal 2014 Actions [Member] | Mar. 29, 2014 Fiscal 2014 Actions [Member] | Dec. 28, 2013 Fiscal 2014 Actions [Member] Jack Cumming [Member] | Mar. 29, 2014 Fiscal 2014 Actions [Member] Jack Cumming [Member] | Sep. 28, 2013 Employee Severance [Member] | Mar. 29, 2014 Other Operating Cost Reductions [Member] | Dec. 28, 2013 Other Operating Cost Reductions [Member] Employees
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges | $ 200,000 |  |  |  | $ 4,600,000 | $ 900,000 |  |  |  | $ 9,700,000 |  | $ 10,500,000 | $ 13,300,000 | $ 900,000 | $ 1,000,000 | $ 1,700,000 | $ 2,000,000 | $ 3,200,000 | $ 900,000 | $ 10,800,000 | $ 600,000 | $ 1,100,000 | $ 200,000 | $ 1,500,000 |  | $ 3,000,000 | $ 900,000 | $ 400,000 | $ 4,800,000 |  | $ 3,000,000 | $ 6,600,000 |  | $ 6,800,000 |  |
Compensation charges |  |  |  |  |  |  |  |  |  |  |  |  | 3,500,000 |  |  |  |  |  |  | 6,300,000 |  |  |  |  |  |  |  |  |  |  |  | 4,400,000 |  | 1,400,000 |  |
Employee retention program, payments in cash |  |  |  |  | 9,700,000 |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated aggregate severance charges |  |  |  | 5,400,000 |  |  |  |  |  |  |  |  |  |  |  | 7,300,000 |  |  |  |  |  |  |  |  | 5,900,000 |  |  |  |  | 6,300,000 |  |  |  |  |  | 9,100,000
Exiting charges |  |  |  |  |  |  |  | 800,000 | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation related acceleration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |
Additional severance charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |
Number of employees affected for severance benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95
Impairment charges of equipment fair value |  | 3,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,300,000 | 3,100,000
Impairment charges for assets held-for-sale |  |  | 700,000 |  |  | 28,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, sales value |  | 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, inventory and certain equipment |  |  | 2,400,000 |  |  |  | 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held-for-sale, goodwill |  |  | 600,000 |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring charges |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on the sale of lifecodes business |  |  |  |  | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposition charge |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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