Fair Value Measurements (Reconciliation of Our Contingent Consideration Liability) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
Jan. 31, 2026 |
Jul. 31, 2025 |
Jan. 31, 2025 |
Jul. 31, 2024 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||||||||
| Contingent consideration liability at the end of the period | $ 240 | $ 669 | $ 240 | $ 669 | $ 369 | $ 514 | $ 665 | $ 0 |
| Initial valuation on the acquisition date | 0 | 0 | 0 | 649 | ||||
| Change in fair value | (110) | 4 | (120) | 20 | ||||
| Payments | $ (19) | $ 0 | $ (154) | $ 0 | ||||