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Inventories
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories

Inventories as of June 30, 2017 and December 31, 2016 were as follows:
In millions 
June 30, 2017
 
December 31, 2016
Raw material
$
452

 
$
407

Work-in-process
139

 
126

Finished goods
692

 
629

LIFO reserve
(84
)
 
(86
)
Total inventories
$
1,199

 
$
1,076