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Fair Value Measurements - Schedule of Carrying Value of Our Long-Term Investments (Details) - Level 3 - USD ($)
3 Months Ended 9 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Upward adjustments $ 0 $ 0 $ 8,000,000 $ 4,000,000
Downward adjustments, including impairments 0 0 (51,000,000) 0
Net adjustments $ 0 $ 0 $ (43,000,000) $ 4,000,000