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Derivative financial instruments - Outstanding Currency, Forward Exchange Contracts (Detail) - USD ($) $ in Thousands | Jul. 31, 2023 | Jul. 31, 2022
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Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 385,000 |
Foreign Currency Forward Contracts | Notional Sell Amounts |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 146,717 | $ 168,410
Foreign Currency Forward Contracts | Notional Sell Amounts | Euro |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 95,064 | 88,275
Foreign Currency Forward Contracts | Notional Sell Amounts | British pound |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 20,489 | 36,779
Foreign Currency Forward Contracts | Notional Sell Amounts | Mexican Peso |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 3,227 |
Foreign Currency Forward Contracts | Notional Sell Amounts | Japanese yen |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 23,195 | 16,688
Foreign Currency Forward Contracts | Notional Sell Amounts | Hong Kong dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 2,080 | 0
Foreign Currency Forward Contracts | Notional Sell Amounts | Australian dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 0 | 278
Foreign Currency Forward Contracts | Notional Sell Amounts | Singapore dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 60 | 378
Foreign Currency Forward Contracts | Notional Sell Amounts | Taiwan Dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 0 |
Foreign Currency Forward Contracts | Notional Sell Amounts | Others |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 2,602 | 26,012
Foreign Currency Forward Contracts | Notional Sell Amounts |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 490,020 | 642,295
Foreign Currency Forward Contracts | Notional Sell Amounts | Euro |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 194,850 | 333,285
Foreign Currency Forward Contracts | Notional Sell Amounts | British pound |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 132,956 | 78,942
Foreign Currency Forward Contracts | Notional Sell Amounts | Mexican Peso |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 28,158 |
Foreign Currency Forward Contracts | Notional Sell Amounts | Japanese yen |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 17,908 | 37,163
Foreign Currency Forward Contracts | Notional Sell Amounts | Hong Kong dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 7,265 | 67,341
Foreign Currency Forward Contracts | Notional Sell Amounts | Australian dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 9,236 | 9,426
Foreign Currency Forward Contracts | Notional Sell Amounts | Singapore dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 19,817 | 18,025
Foreign Currency Forward Contracts | Notional Sell Amounts | Taiwan Dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 8,000 |
Foreign Currency Forward Contracts | Notional Sell Amounts | Others |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 71,830 | $ 98,113

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