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Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Inventories [Line Items]    
Finished goods $ 2,663 $ 2,529
Work-in-process 3,456 3,794
Raw materials and supplies 916 740
Total inventories 7,035 7,063
Noncurrent portion not included above $ 734 [1] $ 761 [1]
[1] Included in Taxes and other noncurrent assets. There are no recoverability issues associated with these amounts.