Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
LIFO Method Related Items [Abstract]
Inventory, LIFO reserve	$ 6	$ 38
LIFO Inventory Amount	151	227
Disposal Group, Including Discontinued Operation, Inventory, Current	582
Inventory, Net [Abstract]
Finished products and parts	2,071	2,606
Raw materials and supplies	593	754
Work in process	167	211
Inventory, net	2,831	3,571
Obsolescence reserves	$ 201	$ 161