Receivables Held for Sale - Summary of Receivables Held for Sale (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Total receivables held-for-sale	$ 2,047	[1]	$ 6,203	[1]	$ 0
First Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total receivables held-for-sale	2,047		3,022
Personal non-credit card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total receivables held-for-sale	$ 0	[1]	$ 3,181	[1]	$ 0

[1] Net of a valuation allowance of $329 million and $1,452 million at December 31, 2013 and December 31, 2012, respectively. The following table provides a rollforward of our valuation allowance for 2013 and 2012: