CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Current assets: | ||
| Accounts receivable, allowances for doubtful accounts | $ (206) | $ (229) |
| Stockholders' equity: | ||
| Common stock, par value (in dollars per share) | $ 0.000006 | $ 0.000006 |
| Class A | ||
| Stockholders' equity: | ||
| Common stock, par value (in dollars per share) | $ 0.000006 | |
| Common stock, shares authorized (in shares) | 5,000,000,000 | 5,000,000,000 |
| Common stock, shares, issued (in shares) | 2,407,000,000 | 2,385,000,000 |
| Common stock, shares, outstanding (in shares) | 2,407,000,000 | 2,385,000,000 |
| Class B Common Stock | ||
| Stockholders' equity: | ||
| Common stock, par value (in dollars per share) | $ 0.000006 | |
| Common stock, shares authorized (in shares) | 4,141,000,000 | 4,141,000,000 |
| Common stock, shares, issued (in shares) | 445,000,000 | 469,000,000 |
| Common stock, shares, outstanding (in shares) | 445,000,000 | 469,000,000 |