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Benefit Plans - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based payment expense | $ 45 | $ 45 |
Share-based payment expense | $ 45 | 45 |
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) | $ 1.54 |  |
Options exercised in period, intrinsic value | $ 1 | 1 |
Exercise of stock options and vesting of restricted stock units (in shares) | 1 |  |
Share-based payment expense | $ 8 | 8 |
Restricted Stock Units (RSUs) and Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based payment expense | 37 | 37 |
Restricted stock units vested, intrinsic value | $ 34 | $ 32 |
Granted (in shares) | 8 |  |
Restricted stock units granted (in shares) | 1 |  |
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) | 4 |  |
Performance-based Share Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 6 |  |
Restricted Stock Units Rsu And Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation costs | $ 425 |  | $ 423
Weighted-average service period (in years) | 2 years 6 months |  |

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