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Other Operating (Income) Expenses, Net (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2021
Jun. 30, 2020
Other Income and Expenses [Abstract]          
Special charges, net $ (6) $ 6   $ 249 $ 22
(Gain) loss on disposal of assets, net (3) (4)   44 (13)
Other operating expenses, net $ (9) $ 2   293 $ 9
Loss Contingency, Damages Awarded, Value     $ 151 $ 220