Equity Investments (Details) - USD ($) $ in Millions |
9 Months Ended | ||
|---|---|---|---|
Jul. 07, 2020 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Equity Investments Without Readily Determinable Fair Value [Roll Forward] | |||
| Balance as of December 31, 2019 | $ 86 | ||
| Jio | 6,302 | $ 61 | |
| Adjustments | (9) | ||
| Balance as of September 30, 2020 | 6,164 | ||
| Jio | |||
| Equity Investments Without Readily Determinable Fair Value [Roll Forward] | |||
| Jio | 5,824 | ||
| Other investments | $ 5,820 | ||
| Other investments | |||
| Equity Investments Without Readily Determinable Fair Value [Roll Forward] | |||
| Other investments | $ 263 | ||