Stock-Based Compensation - Additional Information (Details) shares in Millions, $ in Millions |
9 Months Ended |
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Sep. 30, 2020
USD ($)
shares
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| Stock-based compensation | Ìý |
| Total unrecognized compensation cost related to unvested Awards | $ | $ 45 |
| Weighted average period of recognition related to unvested equity awards (in years) | 2 years 4 months 24 days |
| Common Class A | Ìý |
| Stock-based compensation | Ìý |
| Shares reserved for future issuance upon exercise of stock options | 38.6 |
| Common Class B | Ìý |
| Stock-based compensation | Ìý |
| Shares reserved for future issuance upon exercise of stock options | 3.0 |
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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