Consolidated Securitization Vehicles (Details 7) (Securitization Vehicles, USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2011		Dec. 31, 2011		Jun. 30, 2012
Number of investments			52		34
Loans Receivable
Number of investments			71		18
Fixed / (in millions)			$ 280	[1]	$ 44	[1]
Floating			$ 333	[1]	$ 198	[1]
Coupon			5.11%	[2],[3]	4.40%	[2],[3]
Yield			5.72%	[2],[3]	4.80%	[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 June 30, 2012 and December 31, 2011, respectively.

[3] Calculations for floating rate loans are based on LIBOR of 0.25% and 0.30% as of June 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.