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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 03, 2015	Mar. 28, 2014	Apr. 03, 2015	Mar. 28, 2014
Income Tax Disclosure [Abstract]
Effective tax rate	24.50%	25.00%	22.70%	21.60%
Federal statutory income tax rate		35.00%	35.00%	35.00%
Research and development tax credit	$ 7.0swks_ResearchandDevelopmentTaxCredit		$ 7.0swks_ResearchandDevelopmentTaxCredit
Deferred foreign income tax expense (benefit)				$ (4.5)

- Definition

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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