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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, tax $ 34 $ (9) $ (66) $ (9)
Derivative financial instruments:        
Gains (losses) deferred, tax 0 1 (1) 1
(Gains) losses reclassified to earnings, tax $ (1) $ 0 $ (1) $ 0