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Stockholder's Equity - Stock Repurchase (Details) - USD ($) $ in Thousands | 12 Months Ended | 142 Months Ended |
--- | --- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2023 | Sep. 22, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Payment, Tax Withholding, Share-based Payment Arrangement | $ 4,709 | $ 1,925 | $ 6,145 |  |
Settlement with Taxing Authority |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Payment, Tax Withholding, Share-based Payment Arrangement | $ 0 | $ 0 | $ 3,800 |  |
Stock Repurchase Program 2011 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Additional common stock authorized for repurchase (in shares) |  |  |  |  | 320,000,000
Common stock authorized for repurchase (in shares) |  |  |  |  | 784,000,000
Number of shares repurchased (in shares) |  |  |  | 458,196,792 |
Number of shares available for repurchase (in shares) | 325,803,208 |  |  | 325,803,208 |

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