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Restructuring and Other - Charges/ (Benefits) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Restructuring and Related Activities [Abstract]        
Asset impairments and sales $ 3 $ (3) $ 4 $ (8)
Restructuring 7 3 13 17
Other Restructuring Costs 0 0 3 (50)
Restructuring and other $ 10 $ 0 $ 20 $ (41)