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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 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2011
atms
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 $ 18 $ 41    
Due from Related Parties $ 11     $ 9