Consolidated Securitization Vehicles (Details 7) (Securitization Vehicles, USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2011		Dec. 31, 2011		Sep. 30, 2012
Number of investments			52		33
Loans Receivable
Number of investments			71		14
Fixed / (in millions)			$ 280	[1]	$ 44	[1]
Floating			$ 333	[1]	$ 170	[1]
Coupon			5.11%	[2],[3]	4.34%	[2],[3]
Yield			5.72%	[2],[3]	4.63%	[2],[3]
Maturity (years)	3 years	[2],[4]	3 years 6 months	[2],[4]

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

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

[3] Calculations for floating rate loans are based on LIBOR of 0.21% and 0.30% as of September 30, 2012 and December 31, 2011, respectively.

[4] For loans in CT CDOs, assumes all extension options are executed. For loans in other consolidated securitization vehicles, maturity is based on information provided by the trustees of each respective entity.