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Acquisitions - Western Polymer (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 01, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Acquisitions        
Payment for acquisition, net of cash acquired   $ 208 $ 42  
Cash acquired from acquisition   14 4  
Goodwill   $ 841   $ 801
Western Polymer        
Acquisitions        
Payment for acquisition, net of cash acquired $ 42      
Cash acquired from acquisition 4      
Goodwill 13      
Tangible assets, net $ 29      
Pre-tax acquisition and integration costs     $ 2