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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement of Comprehensive Income [Abstract]    
Foreign currency translation, tax $ 37 $ (100)
Derivative financial instruments:    
Gains (losses) deferred, tax 0 (1)
(Gains) losses reclassified to earnings, tax $ 0 $ 0