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Customer Funding Liabilities (Notes)	3 Months Ended
Customer Funding Liabilities (Notes)	Dec. 31, 2012
Customer Funding Liabilities Abstract
Customer Funding Liabilities	Customer Funding Liabilities We draw funds from and make payments on behalf of our customers for employee expense reimbursements and related corporate credit card payments. We hold these funds in cash and record our obligation to make these expense reimbursements and payments on behalf of our customers as customer funding liabilities.