Income Taxes (Reconciliation From The Federal Statutory Income Tax Rate To The Effective Income Tax Rate) (Details)	12 Months Ended
Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Income Taxes [Abstract]
United States federal statutory income tax rate	35.00%	35.00%	35.00%
Impact from foreign operations	(1.00%)	(1.00%)	(2.00%)
State income taxes, net of federal benefit	1.00%	1.00%	1.00%
Research and development tax credits	(5.00%)	(5.00%)	(1.00%)
Domestic production activities deduction	(2.00%)	(2.00%)	(2.00%)
Foreign tax credits	(2.00%)
Change in valuation allowances			(1.00%)
Nondeductible expense to settle U.S. Government investigation			4.00%
Nondeductible stock option expense and other permanent items	2.00%	(1.00%)	1.00%
Effective income tax rate	28.00%	27.00%	35.00%

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 changes in the valuation allowance for deferred tax assets.

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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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