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Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accrued Liabilities, Current [Abstract] |  |
Extended Emergency Time Off | $ 3 | $ 393
Voluntary Separation Program | 92 | 143
Profitsharing and savings plans | 262 | 25
Vendor prepayment | 0 | 600
Vacation pay | 451 | 436
Health | 152 | 111
Workers compensation | 141 | 161
Property and income taxes | 65 | 84
Interest | 46 | 49
Deferred supplier payments | 80 | 0
Other | 332 | 257
Accrued liabilities | $ 1,624 | $ 2,259

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