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Note 5 - Inventories, Net of Inventory Reserves (Details) - Inventories, Net - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Inventories, Net [Abstract]    
Finished goods $ 633 $ 586
Work in process 264 255
Raw materials and accessories 200 202
Supplies and packing materials 288 279
Total inventories, net of inventory reserves $ 1,385 $ 1,322