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Segments and Geographic Information - Additional Information (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) segment | Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments | segment |  |  | 2 |
Revenue | $ 2,198 | $ 2,025 | $ 6,415 | $ 5,851
Share-based payment expense | 51 | 58 | 149 | 165
Cost of Sales |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Share-based payment expense | 11 | 11 | 33 | 32
Sales and Marketing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Share-based payment expense | 15 | 17 | 43 | 50
Research and Development Expense |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Share-based payment expense | 9 | 11 | 26 | 31
General and Administrative Expense |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Share-based payment expense | 16 | 19 | 47 | 52
Advertising revenue |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 451 | 345 | 1,235 | 866
Advertising revenue | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1 | $ 1 | $ 1 | $ 1

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