Property, Equipment and Technology, Net - Summary of Property, Equipment and Technology, Net (Detail) - USD ($) $ in Millions |
Sep. 30, 2023 |
Sep. 30, 2022 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 8,780 | $ 8,881 |
| Accumulated depreciation and amortization | (5,355) | (5,658) |
| Property, equipment and technology, net | 3,425 | 3,223 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 71 | 72 |
| Buildings and building improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 1,022 | 1,003 |
| Furniture, equipment and leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 2,146 | 2,230 |
| Construction-in-progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 344 | 285 |
| Technology | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 5,197 | $ 5,291 |