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Derivative Financial Instruments - Additional Information (Details) - 6 months ended Jul. 31, 2021 | CNY (¥) | CHF (SFr) | USD ($) | EUR (€) | GBP (£)
--- | --- | --- | --- | --- | ---
Derivatives Fair Value [Line Items] |  |  |  |  |
Cash flow hedges |  |  | $ 0 |  |
Foreign Exchange Forward |  |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |  |
Net forward contracts hedging portfolio | ¥ 16,700,000 | SFr 16,000,000.0 | $ 18,000,000.0 | € 19,700,000 | £ 1,300,000
Maximum |  |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |  |
Expiry dates ranging | Jan. 20, 2022 |  |  |  |

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- Definition Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958 + Details
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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Details
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