Enterprise-wide Disclosures and Concentration of Business - Long-Lived Net Property, Equipment and Technology Assets Classified by Major Geographic Area (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Sep. 30, 2020 |
|---|---|---|
| Segment Reporting Information [Line Items] | ||
| Total | $ 1,882 | $ 1,908 |
| U.S. | ||
| Segment Reporting Information [Line Items] | ||
| Total | 1,286 | 1,350 |
| International | ||
| Segment Reporting Information [Line Items] | ||
| Total | $ 596 | $ 558 |