Property, Equipment and Technology, Net (Detail) - USD ($) $ in Millions |
Sep. 30, 2015 |
Sep. 30, 2014 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 4,283 | $ 3,915 |
| Accumulated depreciation and amortization | (2,395) | (2,023) |
| Property, equipment and technology, net | 1,888 | 1,892 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 71 | 71 |
| Buildings and building improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 803 | 787 |
| Furniture, equipment and leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 1,267 | 1,197 |
| Construction-in-progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | 120 | 76 |
| Technology | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property, equipment and technology | $ 2,022 | $ 1,784 |