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Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Accrued Liabilities, Current [Abstract] |  |
Voluntary Separation Program | $ 64 | $ 65
Profitsharing and savings plans | 41 | 141
Vacation pay | 541 | 516
Health | 174 | 163
Workers compensation | 137 | 133
Property and income taxes | 56 | 63
Interest | 73 | 34
Bonus and incentive pay | 736 | 2,022
Reinsurance payable | 300 | 190
Other | 278 | 279
Accrued liabilities | 2,400 | $ 3,606
Payment of bonus and incentive pay as a ratification of the labor contract agreement | $ 1,350 |

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