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Inventories Schedule of Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Sep. 30, 2015
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 1,365 $ 1,084
Work-in-process 538 369
Finished goods 1,657 924
Inventories $ 3,560 $ 2,377