Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Allowance for doubtful accounts | $ 103 | $ 132 |
| Current portion of debt, fair value | $ 1,983 | $ 1,750 |
| Common Class A | ||
| Common stock, par or stated value per share | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 4,000,000,000 | 4,000,000,000 |
| Common stock, shares issued | 391,202,469 | 382,165,550 |
| Common stock, shares outstanding | 391,202,469 | 382,165,550 |
| Common Class B | ||
| Common stock, par or stated value per share | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 150,000,000 | 150,000,000 |
| Common stock, shares issued | 8,177,190 | 29,366,492 |
| Common stock, shares outstanding | 8,177,190 | 29,366,492 |
| Common Class C | ||
| Common stock, par or stated value per share | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 400,000,000 | 400,000,000 |
| Common stock, shares issued | 0 | 0 |