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Fair Value Measurements - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Oct. 31, 2023 | Oct. 31, 2022 | Jul. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term investments | $ 107,000,000 |  | $ 105,000,000
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Upward adjustments to non-marketable equity securities | 0 | $ 0 |
Cumulative upward adjustments to non-marketable equity securities | $ 71,000,000 |  |

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