Income Taxes (Reconciliation From The Federal Statutory Income Tax Rate To The Effective Income Tax Rate) (Details)	12 Months Ended
Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Income Tax Disclosure [Abstract]
United States federal statutory income tax rate	35.00%	35.00%	35.00%
Impact from foreign operations	(5.00%)	(4.00%)	(1.00%)
State income taxes, net of federal benefit	0.00%	1.00%	1.00%
Research and development tax credits	(16.00%)	(8.00%)	(5.00%)
Domestic production activities deduction	(2.00%)	(2.00%)	(2.00%)
Foreign tax credits	(0.00%)	(0.00%)	(2.00%)
Nondeductible acquisition costs	5.00%	0.00%	0.00%
Nondeductible stock option expense and other permanent items	1.00%	1.00%	2.00%
Effective income tax rate	18.00%	23.00%	28.00%

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
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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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