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Benefit Plans - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based payment expense | $ 47 | $ 47 | $ 92 | $ 98 |
Share-based payment expense |  |  | $ 92 | 98 |
Employees and Non Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Grant date fair value of options ( in USD per share) |  |  | $ 1.50 |  |
Options exercised in period, intrinsic value |  |  | $ 24 | 130 |
Exercise of stock options and vesting of restricted stock units (in shares) |  |  | 2 |  |
Share-based payment expense | 9 | 11 | $ 18 | 22 |
Restricted Stock Units (RSUs) and Performance Shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based payment expense | 38 | $ 36 | 74 | 76 |
Restricted stock units vested, intrinsic value |  |  | $ 63 | $ 54 |
Granted (in shares) |  |  | 15 |  |
Restricted stock units granted (in shares) |  |  | 4 |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Exercise of stock options and vesting of restricted stock units (in shares) |  |  | 6 |  |
Performance-based Share Awards |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) |  |  | 5 |  |
Restricted Stock Units Rsu And Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation costs | $ 418 |  | $ 418 |  | $ 455
Weighted-average service period (in years) |  |  | 2 years 3 months 18 days |  |

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