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Inventories, net
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories, net
Inventories, net

Certain U.S. inventories are measured by the last-in, first-out (“LIFO”) method at the lower of cost or market, while other U.S. and foreign operations use the first-in, first-out (“FIFO”) or average-cost methods at the lower of cost and net realizable value. Inventories consisted of the following:
 
March 31,
 
December 31,
(in millions)
2019
 
2018
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