Receivables - Nonperforming Consumer Receivable Portfolio (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Financing Receivable, Impaired [Line Items]
Real estate secured	$ 32,939	[1],[2]	$ 42,713	[1],[2]
Receivables held for sale	6,203	[3]	0	[3]	4	[3]	3
Total	39,142	[4]	47,909
Personal non-credit card			5,196
Nonperforming Loans [Member]
Financing Receivable, Impaired [Line Items]
Real estate secured	3,032	[1],[2]	6,544	[1],[2]
Receivables held for sale	2,161
Total	5,193	[4]	6,874
Personal non-credit card			330
Performing Loans [Member]
Financing Receivable, Impaired [Line Items]
Real estate secured	29,907	[1],[2]	36,169	[1],[2]
Receivables held for sale	4,042
Total	33,949	[4]	41,035
Personal non-credit card			$ 4,866

[1] At December 31, 2012 and 2011, nonperforming real estate secured receivables held for investment include $1.7 billion and $4.7 billion, respectively, of receivables that are carried at the lower of amortized cost or fair value of the collateral less cost to sell.

[2] At December 31, 2012 and 2011, nonperforming real estate secured receivables held for investment include $2.1 billion and $3.0 billion, respectively, of TDR Loans, some of which may also be carried at fair value of the collateral less cost to sell.

[3] Net of a valuation allowance of $1.5 billion at December 31, 2012

[4] The decrease since December 31, 2011 reflects, in part, the transfer of our entire portfolio of personal non-credit card receivables and a portion of our real estate secured receivables held for sale as these receivables are now carried at the lower of amortized cost or fair value. See Note 7, "Receivables Held for Sale," for additional information.