v2.4.0.8
Inventory (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 978 $ 919
Work-in-process 421 424
Finished goods 1,127 1,129
Inventory at FIFO 2,526 2,472
Excess of FIFO over LIFO cost (121) (133)
Total inventory $ 2,405 $ 2,339