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Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions | Jun. 27, 2020 | Sep. 30, 2019
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Fair Value Disclosures [Abstract] |  |
Cost method investments | $ 9.4 | $ 9.4

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- Definition Cost of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 + Details
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