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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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