Stock-Based Compensation - Additional Information (Details) shares in Millions, $ in Millions |
3 Months Ended |
|---|---|
|
Mar. 31, 2020
USD ($)
shares
| |
| Stock-based compensation | |
| Total unrecognized compensation cost related to unvested Awards | $ | $ 47 |
| Weighted average period of recognition related to unvested equity awards (in years) | 2 years |
| Common Class A | |
| Stock-based compensation | |
| Shares reserved for future issuance upon exercise of stock options | 25.4 |
| Common Class B | |
| Stock-based compensation | |
| Shares reserved for future issuance upon exercise of stock options | 1.8 |