Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
Dec. 29, 2012	Dec. 24, 2011	Mar. 24, 2011	Sep. 29, 2012
Income Taxes [Line Items]
Company's effective tax rate	142.40%	47.80%
Valuation allowance	$ 19,400,000	$ 2,800,000
Gain recorded on Makena sale	53,884,000		84,500,000
Net deferred tax liabilities	1,690,000,000			1,760,000,000
Gross unrecognized tax benefits, including interest	56,700,000
Accrued interest, net of tax benefit	$ 1,900,000

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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- Definition

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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