Concentration Risk (Details) (USD $) In Billions, unless otherwise specified									12 Months Ended						12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 United States and United Kingdom [Member] ATM Purchase [Member] Supplier Concentration Risk [Member]	Dec. 31, 2010 United States and United Kingdom [Member] ATM Purchase [Member] Supplier Concentration Risk [Member]	Dec. 31, 2011 United States and United Kingdom [Member] Accounts Payable [Member] Supplier Concentration Risk [Member]	Dec. 31, 2010 United States and United Kingdom [Member] Accounts Payable [Member] Supplier Concentration Risk [Member]	Dec. 31, 2011 U.S. [Member]	Dec. 31, 2010 Mexico [Member] ATM Purchase [Member] Supplier Concentration Risk [Member]	Dec. 31, 2011 Minimum [Member] days	Dec. 31, 2011 Minimum [Member] Lender Concentration Risk [Member]	Dec. 31, 2011 Maximum [Member] days	Dec. 31, 2011 Maximum [Member] Lender Concentration Risk [Member]	Dec. 31, 2011 Bank Of America [Member]	Dec. 31, 2011 Bank Of America [Member] U.S. [Member] Vault Cash [Member] Lender Concentration Risk [Member]	Dec. 31, 2011 Wells Fargo [Member]	Dec. 31, 2011 Wells Fargo [Member] U.S. [Member] Vault Cash [Member] Lender Concentration Risk [Member]	Dec. 31, 2011 Top Five Merchants [Member] Total Revenues [Member] Customer Concentration Risk [Member]	Dec. 31, 2010 Top Five Merchants [Member] Total Revenues [Member] Customer Concentration Risk [Member]	Dec. 31, 2011 Seven Eleven [Member] Total Revenues [Member] Customer Concentration Risk [Member]	Dec. 31, 2010 Seven Eleven [Member] Total Revenues [Member] Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk percentage			73.90%	62.40%	30.40%	2.60%		7.90%						42.00%		40.40%	50.20%	53.80%	30.90%	34.00%
Amount of vault cash	$ 2.1	$ 1.4					$ 1.7
Typical contract termination notification period									180		360
Notice period to modify the pricing terms, days									90		180
Cash rental agreements expiration										March 2012		December 2016	October 2013		July 2013