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Borrowings and Credit Arrangements - Additional Information (Detail) (USD $)
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3 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | ||||
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Dec. 29, 2012
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Dec. 24, 2011
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Sep. 29, 2012
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Dec. 29, 2012
Credit Agreement [Member]
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Dec. 29, 2012
Credit Agreement [Member]
Minimum [Member]
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Dec. 29, 2012
Credit Agreement [Member]
Maximum [Member]
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Aug. 01, 2012
Senior Notes [Member]
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Dec. 29, 2012
Senior Notes [Member]
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| Schedule Of Borrowings [Line Items] | ||||||||
| Carrying value of debt | $ 4,237,085,000 | $ 4,971,179,000 | ||||||
| Interest rates under Term Loans | 4.00% | 3.21% | 4.50% | |||||
| Interest expense | 30,000,000 | 16,000,000 | ||||||
| Non-cash interest expense amortization of debt discount and deferred financing costs | $ 20,679,000 | $ 19,960,000 | $ 3,700,000 | $ 400,000 | ||||
| Interest rate | 2.00% | 6.25% | ||||||
| Maturity period | 2020 | |||||||
| Debt instrument maturity date | Aug. 01, 2020 | |||||||