Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net fair value of the interest rate lock commitments	$ 11
Change in the fair value of the interest rate lock commitments, due to decrease in current interest rates of 25 bp	8
Change in the fair value of the interest rate lock commitments, due to decrease in current interest rates of 50 bp	15
Change in the fair value of the interest rate lock commitments, due to increase in current interest rates of 25 bp	9
Change in the fair value of the interest rate lock commitments, due to increase in current interest rates of 50 bp	18
Change in fair value of interest rate lock commitments, due to 10% adverse changes in the assumed loan closing rates	1
Change in fair value of interest rate lock commitments, due to 20% adverse changes in the assumed loan closing rates	2
Change in fair value of interest rate lock commitments, due to 10% favorable changes in the assumed loan closing rates	1
Change in fair value of interest rate lock commitments, due to 20% favorable changes in the assumed loan closing rates	2
Commercial loans transferred from the portfolio to loans held for sale	641	62	143
Existing loans held for sale, further adjusted	890	2,856
Fair value option changes in fair value gain (loss)	20	157
Fair Value Changes Included In Earnings For Instruments No Longer Held	431	849
Percentage of Vantiv Holding, LLC sold to Advent for cash and warrants				51.00%
Units of Vantiv Holding LLC Held				20,000,000
Residential Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
The fair value of loans	2	3
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial loans transferred from the portfolio to loans held for sale	5	16
Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net impact related to fair value adjustments	26	57
Nonrecurring Losses Included As Charge-Offs	19	17
Commercial Loans Held For Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net impact related to fair value adjustments	3	12
Commercial Loans HFS transferred from portfolio in the current quarter
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net impact related to fair value adjustments	$ 4	$ 1