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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Inventories
(in millions)
September 30,
2015
 
December 31,
2014
Finished goods
$
212

 
$
194

Work in process
45

 
42

Raw materials
220

 
250

Total inventories
$
477

 
$
486