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Related Party Transactions (Narrative) (Details)
card in Millions, $ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
card
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Banco Bradesco [Member]      
Related Party Transaction [Line Items]      
Ownership percentage in joint venture 51.00%    
Notes payout period 10 years    
Triggered payments $ 6 $ 5  
Noncontrolling interest value $ 99    
Number of cards processed | card 80    
Banco Bradesco [Member] | Contract-Based Intangible Assets [Member]      
Related Party Transaction [Line Items]      
Unamortized contract intangible asset $ 88    
One-time Dividend Payment [Member] | Banco Bradesco [Member]      
Related Party Transaction [Line Items]      
One time dividend payment 20 24  
Banco Bradesco [Member]      
Related Party Transaction [Line Items]      
Total related party revenues 272 237 $ 281
Banco Bradesco [Member] | Unfavorable Currency Impact [Member]      
Related Party Transaction [Line Items]      
Total related party revenues $ 12 $ 96