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Accounting Policies Schedule of Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Mar. 31, 2014
Mar. 31, 2013
Sep. 30, 2014
Sep. 30, 2013
Feb. 13, 2013
Venezuela foreign currency devaluation   88.00%       32.00%
Exchange rate net charges, total   $ 42 $ 51      
Exchange rate net charges on other expense, net   54 34      
Exchange rate net charges on income taxes   (12) 17      
Charge for Venezuelan non-monetary assets to their net realizable value   115.7   (115.7) 0  
Out Of Period Adjustment (10)     (16)    
Out of Period Adjustment After Tax (7)     (7)    
Latin America [Member]
           
Out Of Period Adjustment $ (10)     $ (18)