Property, Equipment and Technology, Net - Schedule of Property, Equipment and Technology, Net (Detail) - USD ($) $ in Millions |
Sep. 30, 2024 |
Sep. 30, 2023 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 9,297 | $ 8,780 |
| Accumulated depreciation and amortization | (5,473) | (5,355) |
| Property, equipment and technology, net | 3,824 | 3,425 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 72 | 71 |
| Buildings and building improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 1,042 | 1,022 |
| Furniture, equipment and leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 2,301 | 2,146 |
| Construction-in-progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 222 | 344 |
| Technology | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 5,660 | $ 5,197 |