Prepaid Expenses and Other Assets - Additional Information (Detail) (Other Investments, Visa Vale issuer Companhia Brasileira de Solucoes e Servicos, USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
Jan. 24, 2011	Sep. 30, 2011
Other Investments \| Visa Vale issuer Companhia Brasileira de Solucoes e Servicos
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Percentage of investment ownership sold	10.00%
Gross proceeds received from the sale of the investment	$ 103
Book value of the investment sold	17
Pre-tax gain recognized from the sale of the investment, net of transaction costs	85	85
Gain recognized from the sale of the investment, net of tax	$ 44

This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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