Income Taxes (Withholding Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Document Period End Date	Sep. 28, 2018
Withholding taxes	$ 50,313	$ 48,012	$ 45,151

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

No definition available.

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Data Type:	xbrli:dateItemType
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Period Type:	duration