Derivative Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Jun. 30, 2009
Derivative
Valuation adjustments related to the credit risk associated with counterparties of customer accomodation derivative contracts	$ 16	$ 18
Maximum length of time hedged in cash flow hedge	2 years 5 months
Percentage of Vantiv Holding, LLC sold to Advent for cash and warrants			51.00%
Interest Rate Contract
Derivative
Notional amount of the risk participation agreements	1,207	1,006
Credit Risk Derivatives Average Remaining Life	3 years 10 months 24 days
Fair value of risk participation agreements	3	2
Interest Rate Contract | Cash Flow Hedging
Derivative
Deferred gains, net of tax, on cash flow hedges were recorded in accumulated other comprehensive income	31	50
Net deferred gains, net of tax, recorded in accumulated other comprehensive income are expected to be reclassified into earnings during the next twelve months	18
Total collateral (up to and exceeding 100% of the net position)
Derivative
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	534	927
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 648	$ 785