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Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions | Apr. 30, 2020 | Apr. 29, 2020 | Jan. 31, 2020 | Oct. 31, 2019 | Oct. 18, 2019 | Mar. 29, 2019 | Jul. 18, 2018 | Apr. 25, 2017
--- | --- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt issuance costs |  | $ 0.2 | $ 0.4 |  | $ 0.2 |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt issuance costs | $ 2.3 |  |  | $ 2.2 |  | $ 0.8 | $ 0.6 | $ 2.0

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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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