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Fair Value Measurements - Estimated Fair Values of Convertible Notes (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Sep. 28, 2013
Estimated Fair Value Of Financial Instruments [Line Items]
Estimated fair values of debt instruments	$ 1,401,500	$ 1,820,300
2007 Notes [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Estimated fair values of debt instruments		405,000
2010 Notes [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Estimated fair values of debt instruments	507,800	510,800
2012 Notes [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Estimated fair values of debt instruments	502,800	518,800
2013 Notes [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Estimated fair values of debt instruments	$ 390,900	$ 385,700

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- Definition

Longterm debt fair value disclosure.

+ References

No definition available.

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