Significant Accounting Policies - Fiscal Year, Basis of Presentation, Cash Equivalents and Concentration of Credit Risk (Details) $ in Millions	12 Months Ended
Oct. 03, 2020 USD ($) months	Sep. 28, 2019
Product Information [Line Items]
Cash and cash equivalents held outside of U.S.	$ 349.7
Cash and cash equivalents, foreign operations in foreign currency	$ 334.3
Accounts receivable \| Customer one
Product Information [Line Items]
Concentration risk, percentage	23.90%	28.60%
Maximum
Product Information [Line Items]
Highly liquid investments maturities (in months) \| months	3

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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