Consolidated Balance Sheets (Parenthetical) - $ / shares |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Class A Non-voting Common Stock | ||
| Common stock par value | $ 0.00001 | $ 0.00001 |
| Common stock authorized | 3,000,000,000 | 3,000,000,000 |
| Common stock issued | 999,303,709 | 883,022,000 |
| Common stock outstanding | 999,303,709 | 883,022,000 |
| Class B Voting Common Stock | ||
| Common stock par value | $ 0.00001 | $ 0.00001 |
| Common stock authorized | 700,000,000 | 700,000,000 |
| Common stock issued | 93,845,000 | 122,564,000 |
| Common stock outstanding | 93,845,000 | 122,564,000 |
| Class C Voting Common Stock | ||
| Common stock par value | $ 0.00001 | $ 0.00001 |
| Common stock authorized | 260,888,000 | 260,888,000 |
| Common stock issued | 224,611,000 | 216,616,000 |
| Common stock outstanding | 224,611,000 | 216,616,000 |