Previously Consolidated Variable Interest Entities (Details 4) (Previously Consolidated Variable Interest Entities, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Number of investments	57
Loans Receivable
Number of investments	76
Fixed / (in millions)	$ 336	[1]
Floating	$ 338	[1]
Coupon	5.06%	[2],[3]
Yield	5.99%	[2],[3]
Maturity (years)	3 years 6 months	[3],[4]

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

[2] Calculations for floating rate loans are based on LIBOR of 0.30% as of December 31, 2011.

[3] Represents a weighted average as of December 31, 2011.

[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.