Outstanding Balance of All Contractually Required Payments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable Recorded Investment 1 [Line Items]
Outstanding Balance	$ 37	$ 73
Carrying amount	11	24
Commercial
Financing Receivable Recorded Investment 1 [Line Items]
Outstanding Balance	9	15
Consumer
Financing Receivable Recorded Investment 1 [Line Items]
Outstanding Balance	$ 28	$ 58

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References+ Details

The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References+ Details