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Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accrued Liabilities, Current [Abstract] |  |
Voluntary Separation Program | $ 85 | $ 92
Profitsharing and savings plans | 65 | 262
Vacation pay | 456 | 451
Health | 153 | 152
Workers compensation | 138 | 141
Property and income taxes | 61 | 65
Interest | 107 | 46
Deferred supplier payments | 0 | 80
Other | 295 | 335
Accrued liabilities | $ 1,360 | $ 1,624

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