Geographical Information - Property and Equipment, Net (Details) - USD ($) $ in Millions |
Sep. 30, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Long-Lived Assets By Geographical Area | ||
| Total long-lived assets | $ 51,730 | $ 44,783 |
| United States | ||
| Long-Lived Assets By Geographical Area | ||
| Total long-lived assets | 40,970 | 35,858 |
| Rest of the world | ||
| Long-Lived Assets By Geographical Area | ||
| Total long-lived assets | $ 10,760 | $ 8,925 |