Consolidated Securitization Vehicles (Details 2) (Securitization Vehicles, HeldToMaturity, USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012 Securities Issues		Dec. 31, 2011 Issues Securities
Securitization Vehicles | HeldToMaturity
Number of securities	34		52
Number of issues	24		36
Rating	B+	[1],[2]	BB+	[1],[2]
Fixed	$ 166	[3]	$ 358	[2]
Floating	$ 1	[3]	$ 1	[3]
Coupon	6.10%	[1],[4]	6.49%	[1],[4]
Yield	6.61%	[1],[4]	7.41%	[1],[4]
Life (years)	3 years 1 month	[1],[5]	2 years 5 months	[1],[5]

[1] Represents a weighted average as of June 30, 2012 and December 31, 2011, respectively.

[2] Weighted average ratings are based on the lowest rating published by Fitch Ratings, Standard & Poor's or Moody's Investors Service for each security.

[3] Represents the aggregate net book value of the portfolio allocated between fixed rate and floating rate securities.

[4] Coupon is based on the securities' contractual interest rates, while yield is based on expected cash flows for each security, and considers discounts/premiums and asset non-performance. Calculations for floating rate securities are based on LIBOR of 0.25% and 0.30% as of June 30, 2012 and December 31, 2011, respectively.

[5] Weighted average life is based on the timing and amount of future expected principal payments through the expected repayment date of each respective investment.