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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, tax $ 30 $ 4 $ 94 $ 21
Derivative financial instruments:        
Gains (losses) deferred, tax 8 5 22 8
(Gains) losses reclassified to earnings, tax (7) (3) (23) (6)
Available-for-sale securities:        
Gains (losses) deferred, tax 0 (1) 0 (1)
(Gains) losses reclassified to earnings, tax $ 0 $ 0 $ 0 $ 0