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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, tax $ (2) $ (77) $ (68) $ (86)
Derivative financial instruments:        
Gains (losses) deferred, tax 0 1 (1) 2
(Gains) losses reclassified to earnings, tax $ 0 $ (1) $ (1) $ (1)