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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | The following table summarizes total stock-based compensation expense (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2022 | 2023 |  | 2022 | 2023
Operations and support | $ | 18 |  | $ | 17 |  |  | $ | 47 |  | $ | 51 |
Product development | 135 |  | 175 |  |  | 398 |  | 515 |
Sales and marketing | 28 |  | 33 |  |  | 78 |  | 97 |
General and administrative | 53 |  | 61 |  |  | 153 |  | 167 |
Stock-based compensation expense | $ | 234 |  | $ | 286 |  |  | $ | 676 |  | $ | 830 |
Schedule of Stock Option Activity | A summary of stock option and restricted stock unit (“RSU”) activity under the Company’s equity incentive plans was as follows (in millions, except per share amounts):
|  |  | Outstanding Stock Options |  | Outstanding RSUs
| Shares Available for Grant |  | Number of Shares | Weighted- Average Exercise Price |  | Number of Shares | Weighted- Average Grant Date Fair Value
As of December 31, 2022 | 108 |  |  | 22 |  | $ | 23.41 |  |  | 34 |  | $ | 77.07 |
Granted | (11) |  |  | 1 |  | 122.41 |  |  | 10 |  | 121.42 |
Increase in shares available for grant | 32 |  |  | — |  | — |  |  | — |  | — |
Exercised/Vested | 3 |  |  | (16) |  | 4.93 |  |  | (9) |  | 98.85 |
Canceled | 2 |  |  | — |  | — |  |  | (2) |  | 119.46 |
As of September 30, 2023 | 134 |  |  | 7 |  | $ | 69.66 |  |  | 33 |  | $ | 83.06 |
| Number of Shares | Weighted- Average Exercise Price | Weighted- Average Remaining Contractual Life (years) | Aggregate Intrinsic Value
Options outstanding as of September 30, 2023 | 7 |  | $ | 69.66 |  | 5.83 | $ | 544 |
Options exercisable as of September 30, 2023 | 6 |  | $ | 57.21 |  | 5.06 | $ | 480 |
Schedule of Restricted Stock Unit Activity | A summary of stock option and restricted stock unit (“RSU”) activity under the Company’s equity incentive plans was as follows (in millions, except per share amounts):
|  |  | Outstanding Stock Options |  | Outstanding RSUs
| Shares Available for Grant |  | Number of Shares | Weighted- Average Exercise Price |  | Number of Shares | Weighted- Average Grant Date Fair Value
As of December 31, 2022 | 108 |  |  | 22 |  | $ | 23.41 |  |  | 34 |  | $ | 77.07 |
Granted | (11) |  |  | 1 |  | 122.41 |  |  | 10 |  | 121.42 |
Increase in shares available for grant | 32 |  |  | — |  | — |  |  | — |  | — |
Exercised/Vested | 3 |  |  | (16) |  | 4.93 |  |  | (9) |  | 98.85 |
Canceled | 2 |  |  | — |  | — |  |  | (2) |  | 119.46 |
As of September 30, 2023 | 134 |  |  | 7 |  | $ | 69.66 |  |  | 33 |  | $ | 83.06 |
| Number of Shares | Weighted- Average Exercise Price | Weighted- Average Remaining Contractual Life (years) | Aggregate Intrinsic Value
Options outstanding as of September 30, 2023 | 7 |  | $ | 69.66 |  | 5.83 | $ | 544 |
Options exercisable as of September 30, 2023 | 6 |  | $ | 57.21 |  | 5.06 | $ | 480 |

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