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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, tax $ 54 $ (20) $ 64 $ 17
Derivative financial instruments:        
Gains (losses) deferred, tax 8 3 14 3
(Gains) losses reclassified to earnings, tax (9) (3) (16) (3)
Available-for-sale securities        
Gains (losses) deferred, tax 0 0 0 0
(Gains) losses reclassified to earnings, tax $ 0 $ 0 $ 0 $ 0