Basis of Presentation and Summary of Significant Accounting Policies Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Jun. 30, 2013 Banco Bradesco SA [Member]	Jun. 30, 2012 Banco Bradesco SA [Member]	Jun. 30, 2013 Banco Bradesco SA [Member]	Jun. 30, 2012 Banco Bradesco SA [Member]	Dec. 31, 2012 Banco Bradesco SA [Member]	Dec. 31, 2011 Banco Bradesco SA [Member] atms
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
Related Party Transaction, Revenues from Transactions with Related Party		$ 36	$ 28	$ 77	$ 55
Due from Related Parties		$ 15		$ 15		$ 9