Receivables - TDR Loans (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Unpaid principal balance subject to reduction	$ 484		$ 92
TDR Loans held for investment, recorded at the lower of amortized cost or FV less cost to sell	509		604
Real Estate Secured [Member] | Receivables Held For Sale [Member]
Financing Receivable, Modifications [Line Items]
TDR Loans	1,285	[1],[2],[3]	1,392	[1],[2],[3]
Receivables Held For Sale [Member] | Real Estate Secured [Member]
Financing Receivable, Modifications [Line Items]
Unpaid balance of TDR loans	1,952		2,587
Real estate secured [Member]
Financing Receivable, Modifications [Line Items]
TDR Loans	12,040	[1],[2]	13,072	[1],[2]
Credit loss reserves for TDR loans	2,161	[3],[4]	2,654	[3],[4]
Unpaid balance of TDR loans	13,153		14,758
First Lien [Member]
Financing Receivable, Modifications [Line Items]
TDR Loans	9,816	[1],[2],[5]	10,633	[1],[2],[5]
Credit loss reserves for TDR loans	1,891	[4]	2,294	[4]
Unpaid balance of TDR loans	10,124		10,983
Second Lien [Member]
Financing Receivable, Modifications [Line Items]
TDR Loans	939	[1],[2],[5]	1,047	[1],[2],[5]
Credit loss reserves for TDR loans	270	[4]	360	[4]
Unpaid balance of TDR loans	$ 1,077		$ 1,188

[1] TDR Loans are considered to be impaired loans regardless of accrual status.

[2] The TDR Loan balances included in the table above reflect the current carrying amount of TDR Loans and includes all basis adjustments on the loan, such as unearned income, unamortized deferred fees and costs on originated loans and premiums or discounts on purchased loans as well as any charge-off recorded in accordance with our existing charge-off policies. Additionally, the carrying amount of TDR Loans classified as held for sale has been reduced by both the lower of amortized cost or fair value adjustment as well as the credit loss reserves associated with these receivables prior to the transfer. The following table reflects the unpaid principal balance of TDR Loans. Real Estate Secured: First lien $10,124 and $10,983 at September 30, 2014 and December 31, 2013, respectively; Second lien $1,077 and $1,188 at September 30, 2014 and December 31, 2013, respectively; Real estate secured receivables held for sale $1,952 and $2,587 at September 30, 2014 and December 31, 2013, respectively; Total real estate secured $13,153 and $14,758 at September 30, 2014 and December 31, 2013, respectively. At September 30, 2014 and December 31, 2013, the unpaid principal balances reflected above include $484 million and $92 million, respectively, which has received a reduction in the unpaid principal balance as part of an account management action.

[3] There are no credit loss reserves associated with receivables classified as held for sale as they are carried at the lower of amortized cost or fair value.

[4] Included in credit loss reserves.

[5] At September 30, 2014 and December 31, 2013, TDR Loans held for investment totaling $509 million and $604 million, respectively, are recorded at the lower of amortized cost or fair value of the collateral less cost to sell.