Description of Business and Significant Accounting Policies - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Cash	$ 121,320	$ 85,688
Money market demand accounts and other	264,487	138,073
Restricted cash	2,087	2,493
Total cash and cash equivalents and restricted cash	$ 387,894	$ 226,254	$ 297,686	$ 569,254

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Period Type:	instant