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Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Feb. 28, 2018
Restructuring Cost and Reserve [Line Items]        
Restructuring $ (23) $ (4) $ (3)  
Impairment of equity method investment 0 0 (4)  
Asset impairments (83) 0 0  
Plant/office closures (4) 13 (52)  
European Commission investigation (89) 0 0  
Commercial disputes (4) 0 0  
Other (charges) gains, net (203) $ 9 (59)  
Engineered Materials [Member]        
Restructuring Cost and Reserve [Line Items]        
Commercial disputes 15      
Other Activities [Member]        
Restructuring Cost and Reserve [Line Items]        
Commercial disputes $ 19      
Acetyl Intermediates [Member]        
Restructuring Cost and Reserve [Line Items]        
Plant/office closures     (52)  
Acetyl Intermediates [Member] | Contract Termination [Member]        
Restructuring Cost and Reserve [Line Items]        
Plant/office closures     (22)  
Acetyl Intermediates [Member] | Non-income tax receivable adjustment [Member]        
Restructuring Cost and Reserve [Line Items]        
Plant/office closures     (21)  
InfraServ GmbH & Co. Gendorf KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage 30.00%      
InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage [1],[2] 30.00% 30.00%    
YNCORIS GmbH & Co. KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage [3] 22.00%      
YNCORIS GmbH & Co. KG [Member] | Other Activities [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage [1],[2],[4] 22.00% 22.00%    
InfraServ GmbH & Co. Knapsack KG and InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairment of equity method investment     $ (4)  
Maximum [Member] | InfraServ GmbH & Co. Gendorf KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage       39.00%
Maximum [Member] | YNCORIS GmbH & Co. KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage       27.00%
Minimum [Member] | InfraServ GmbH & Co. Gendorf KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage       30.00%
Minimum [Member] | YNCORIS GmbH & Co. KG [Member]        
Restructuring Cost and Reserve [Line Items]        
Ownership percentage       22.00%
[1]
InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.
[2]
See Note 18 for further information.
[3]
Formerly known as InfraServ GmbH & Co. Knapsack KG.
[4]
Formerly known as InfraServ GmbH & Co. Knapsack KG.