Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2026	Jul. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 6,162	$ 5,973
Long-term investments	176	94
Senior unsecured notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	5,000	5,000
Level 2 \| Senior unsecured notes \| Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior unsecured notes	4,800	$ 5,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cumulative upward adjustments to non-marketable equity securities	125
Cumulative downward adjustments, including impairments	$ 27

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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