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Inventories, net - Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 1,315 $ 1,175
Work in process 1,149 798
Finished goods and purchased products 3,000 3,630
Total $ 5,464 $ 5,603