Income Taxes - Summary of Domestic and Foreign Income (Loss) from Continuing Operations Before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Income Tax Disclosure [Abstract]
United States	$ (65,915)	$ (458,617)	$ (145,851)
Foreign	24,353	35,464	(9,384)
(Loss) income from operations before income taxes	$ (41,562)	$ (423,153)	$ (155,235)

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration