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Derivative Financial Instruments - Outstanding Currency, Forward Exchange Contracts (Detail) - Foreign Currency Forward Contracts [Member] - USD ($) $ in Thousands | Jul. 31, 2020 | Jul. 31, 2019
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Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 205,754 | $ 278,813
Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 457,903 | 408,006
Euro [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 108,856 | 219,910
Euro [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 207,198 | 90,043
British Pound [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 18,861 | 20,542
British Pound [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 60,397 | 45,955
Japanese Yen [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 15,815 | 32,560
Japanese Yen [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 32,009 | 48,670
Australian Dollar [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 174 | 350
Australian Dollar [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 7,682 | 7,683
Hong Kong Dollar [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 56,279 | 1,209
Hong Kong Dollar [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 74,714 | 136,818
Singapore Dollar [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 1,357 | 782
Singapore Dollar [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 15,982 | 15,449
Others [Member] | Sell [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 4,412 | 3,460
Others [Member] | Buy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 59,921 | $ 63,388

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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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