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Borrowings and Credit Arrangements - Interest Expense under Convertible Notes (Parenthetical) (Detail) (Convertible Notes Payable [Member])
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 24, 2011
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Convertible Notes Payable [Member]
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| Debt Conversion [Line Items] | |||
| Percentage of accrued interest on Convertible Notes | 2.00% | 2.00% | 2.00% |