VARIABLE INTEREST ENTITIES BORROWINGS (Securitization) (Details) (RSO [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015
RREF CDO 2006-1 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	$ 194.2
RREF CDO 2007-1 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	209.2
RCC CRE Notes 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	78.8
RCC CRE Notes 2014 [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	0
RCC CRE Notes 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	0
Apidos CDO III Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	195.5
Apidos Cinco CDO Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	92.3
Moselle CLO S.A. Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	167.2
Moselle CLO S.A. Securitized Borrowings [Member]
Debt Instrument [Line Items]
Debt Instrument, Cumulative Amount Repaid	$ 5.0