v3.2.0.727
Inventory (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials $ 1,130 $ 924
Work-in-process 279 422
Finished goods 1,152 1,201
Inventory at FIFO 2,561 2,547
Excess of FIFO over LIFO cost (122) (119)
Total inventory $ 2,439 $ 2,428