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Basis of Presentation and Summary of Significant Accounting Policies Related Party Transactions (Details) (Banco Bradesco SA [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2011
atm
Dec. 31, 2013
Banco Bradesco SA [Member]
           
Related Party Transaction [Line Items]            
Target Number of ATMs to be Purchased under Master Purchase Agreement         30,000  
Number of Years for ATM Master Purchase Agreement         5 years  
Revenue from Related Parties $ 22 $ 24 $ 54 $ 101    
Due from Related Parties $ 15   $ 15     $ 9