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Summary of Significant Accounting Policies Inventories, Net (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventories, Net [Abstract]    
Raw materials $ 499 $ 495
Work in process 252 248
Finished goods 1,151 1,212
Inventories, net $ 1,902 $ 1,955