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Fair Value Measurements - Additional Information (Detail) - USD ($) | Mar. 26, 2022 | Sep. 25, 2021 | Sep. 26, 2020
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Fair Value, Recurring [Member] |  |  |
Fair Value Disclosures [Line Items] |  |  |
Liabilities at fair value | $ 0 | $ 0 | $ 0

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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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