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Segment Information - Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Segment information    
Total assets $ 5,932 $ 5,728
North America    
Segment information    
Total assets 3,919 3,737
South America    
Segment information    
Total assets 711 711
Asia-Pacific    
Segment information    
Total assets 806 792
EMEA    
Segment information    
Total assets $ 496 $ 488