Geographic Areas (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Net Sales, Operating Income and Property, Plant and Equipment - Net      
Net sales $ 7,578 $ 7,831  
Operating Income (Loss) 1,730 1,716  
Property, Plant and Equipment - net $ 8,286   $ 8,489