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Borrowings and Credit Arrangements - Company's Borrowings (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 29, 2014 | Sep. 28, 2013
--- | --- | ---
Debt Instrument [Line Items] |  |
Convertible Notes |  | $ 400,133
Current debt obligations, net of debt discount | 89,497 | 563,812
Convertible Notes | 1,210,595 | 1,187,992
Total long-term debt obligations | 4,183,958 | 4,242,098
Total debt obligations | 4,273,455 | 4,805,910
Term Loan A [Member] |  |
Debt Instrument [Line Items] |  |
Current debt obligations, net of debt discount | 74,628 | 49,713
Long-term debt obligations, net of debt discount | 845,782 | 894,834
Term Loan B [Member] |  |
Debt Instrument [Line Items] |  |
Current debt obligations, net of debt discount | 14,869 | 113,966
Long-term debt obligations, net of debt discount | 1,127,581 | 1,159,272
Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt obligations, net of debt discount | $ 1,000,000 | $ 1,000,000

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