Other Income (Expense), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ (7,186)	$ 9,832	$ (4,515)
Foreign exchange gain (loss)
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	(11,286)	4,656	(6,310)
Gain on deferred compensation investments, net (Note 12)
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	4,835	4,955	1,738
Other
Component of Other Income (Expense), Nonoperating [Line Items]
Other income (expense)	$ (735)	$ 221	$ 57