Income Taxes - Net Deferred Tax Position (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Deferred Tax Assets:
Credit loss reserves	$ 1,220		$ 1,678
Receivables held for sale	101		921
Federal and state unused tax benefit carryforwards	1,080		930
Market value adjustment related to derivatives and long-term debt carried at fair value	392		624
Interests in Real Estate Mortgage Investment Conduits	394	[1]	505	[1]
Accrued expenses not currently deductible	199		183
Other	271		280
Total deferred tax assets	3,657		5,121
Valuation allowance	(931)		(982)
Total deferred tax assets net of valuation allowance	2,726		4,139
Deferred Tax Liabilities:
Fee income	82		105
Other	64		145
Total deferred tax liabilities	146		250
Net deferred tax assets	$ 2,580		$ 3,889

[1] Real Estate Mortgage Investment Conduits ("REMIC") are investment vehicles that hold commercial and residential mortgages in trust and issue securities representing an undivided interest in these mortgages. We hold portfolios of noneconomic residual interests in a number of REMICs through one of our subsidiaries. This item represents the tax basis in such interests which has accumulated as a result of tax rules requiring the recognition of income related to such noneconomic residuals.