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Inventories, net (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw material and supplies $ 496 $ 485
Work in progress 116 114
Finished goods 213 199
FIFO inventories 825 798
LIFO reserve (18) (17)
Inventories, net $ 807 $ 781