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Fair Value Measurements - Schedule of Carrying Value of Our Long-Term Investments (Details) - Level 3 - USD ($) | 3 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Upward adjustments | $ 27,000,000 | $ 0
Downward adjustments, including impairments | 0 | (42,000,000)
Net adjustments | $ 27,000,000 | $ (42,000,000)

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