Income Taxes - Reconciliation of Effective Income Tax Rate to Federal Rate (Detail)	12 Months Ended
Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Income Tax Disclosure [Abstract]
Federal income tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	2.00%	1.80%	2.00%
Domestic production activity deduction	(2.10%)	(2.50%)	(2.50%)
Earnings in jurisdictions taxed at rates different from the statutory U.S. federal rate	(0.70%)	(1.90%)	(0.50%)
Other, including tax reserves and related interest	0.40%	(1.40%)	(0.70%)
Effective Income Tax Rate, Continuing Operations, Total	34.60%	31.00%	33.30%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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