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Stock Incentive Plans - Narrative (Details) - USD ($) shares in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Compensation expense |  | $ 332 | $ 340 | $ 419
Unrecognized compensation expense |  | $ 273 |  |
Weighted-average period for total unrecognized compensation expense for nonvested equity awards |  | 1 year 7 months 6 days |  |
Fair value of stock incentive awards vested |  | $ 257 | $ 425 | $ 307
Performance Share Units (PSUs) |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Performance period |  | 3 years |  |
Stock options |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Expiration period |  | 10 years |  |
Dividend yield |  |  | 1.90% | 1.60%
Expected volatility rate |  |  | 34.00% | 41.00%
Risk-free interest rate |  |  | 3.70% | 1.88%
Expected option life |  | 6 years | 6 years | 6 years
Service-based Employee Stock Options | Maximum |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Service period |  | 3 years |  |
Restricted Stock Units (RSUs) |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Service period |  | 3 years |  |
Cruise Stock Incentive Awards |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Cash used to settle awards |  | $ 200 | $ 300 | $ 600
Cruise Stock Incentive Awards | Stock options and RSUs |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Compensation expense |  |  | $ 400 | $ 1,600
Cruise Stock Incentive Awards | Restricted Stock Units (RSUs) |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Numbers of awards that vested immediately (in shares) | 31 |  |  |
Cruise Stock Incentive Awards | Restricted Stock Units (RSUs) | Maximum |  |  |  |
Stock Incentive Plans Narratives [Abstract] |  |  |  |
Service period | 4 years |  |  |

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