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Other (Charges) Gains, Net (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other (Charges) Gains, Net [Line Items]      
Commercial disputes $ (4) $ 0 $ 0
Restructuring 23 4 3
Asset impairments 83 0 $ 0
Other Activities [Member]      
Other (Charges) Gains, Net [Line Items]      
Commercial disputes 19    
Engineered Materials [Member]      
Other (Charges) Gains, Net [Line Items]      
Commercial disputes 15    
Ocotlán, Mexico [Member]      
Other (Charges) Gains, Net [Line Items]      
Restructuring [1] 4 2  
Asset impairments [1] $ 83 $ 0  
[1]
Included in Other (charges) gains, net in the consolidated statements of operations (Note 18).