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Other Income (Expense), Net - Components of Other Income (Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other Income And Expenses [Abstract]      
Leasing, contract services and miscellaneous income $ 20 $ 51 $ 79
Royalty income 18 16 10
Gain on sales of assets and businesses 8 10 45
Exchange (losses) gains, net (26) (2) 1
Non-operating pension and other post-retirement employee benefit income (cost) 1 (368) 27
Total other income (expense), net $ 21 $ (293) $ 162