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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Income taxes paid (received) $ 26 $ 34  
Interest paid in cash 70 69  
Amount of receivables sold 303 216 $ 600
U.S.      
Income taxes paid (received) (7) 3  
Non-U.S.      
Income taxes paid (received) $ 33 $ 31