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v3.21.2

Benefit Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based payment expense | $ 47 | $ 52 | $ 98 | $ 107 |
Share-based payment expense |  |  | $ 98 | 107 |
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) |  |  | $ 1.78 |  |
Options exercised in period, intrinsic value |  |  | $ 130 | 39 |
Exercise of stock options and vesting of restricted stock units (in shares) |  |  | 18,000,000 |  |
Share-based payment expense | 11 | 12 | $ 22 | 23 |
Restricted Stock Units (RSUs) and Performance Shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based payment expense | 36 | $ 40 | 76 | 84 |
Restricted stock units vested, intrinsic value |  |  | $ 54 | $ 77 |
Granted (in shares) |  |  | 13,000,000 |  |
Restricted Stock Units (RSUs) and Performance Shares | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted stock units granted (in shares) |  |  | 1,000,000 |  |
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) |  |  | 5,000,000 |  |
Performance-based Share Awards |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) |  |  | 7,000,000 |  |
Restricted Stock Units Rsu And Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation costs | $ 413 |  | $ 413 |  | $ 385
Weighted-average service period (in years) |  |  | 2 years 2 months 12 days |  |

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