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Derivatives and Hedging - Fair Value and Associated Notional Amounts (Details) - Cash Flow Hedging - USD ($) | Oct. 31, 2019 | Jul. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Notional | $ 849,999,000 | $ 849,550,000
Fair Value in Other Current Liabilities | 17,370,000 | 12,463,000
Foreign currency forward contracts |  |
Derivative [Line Items] |  |
Notional | 51,799,000 | 0
Fair Value in Other Current Liabilities | 729,000 | 0
Interest rate swap agreements |  |
Derivative [Line Items] |  |
Notional | 798,200,000 | 849,550,000
Fair Value in Other Current Liabilities | $ 16,641,000 | $ 12,463,000

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