Segment Information - Schedule of Long-Lived Net Property, Equipment and Technology Assets by Major Geographic Area (Details) - USD ($) $ in Millions |
Sep. 30, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Segment Reporting Information [Line Items] | ||
| Total | $ 2,424 | $ 2,329 |
| U.S. | ||
| Segment Reporting Information [Line Items] | ||
| Total | 1,826 | 1,738 |
| International | ||
| Segment Reporting Information [Line Items] | ||
| Total | $ 598 | $ 591 |