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Employee Benefit Obligations - Total (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Employee Benefit Obligations    
Underfunded defined benefit pension liabilities $ 496 $ 582
Less current portion (20) (21)
Long-term defined benefit pension liabilities 476 561
Long-term retiree medical liabilities 130 135
Deferred compensation plans 332 441
Other 35 68
Total non-current employee benefit obligations $ 973 $ 1,205