INVESTMENTS IN JOINT VENTURES (Equity in Joint Venture income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Equity Method Investments and Joint Ventures [Abstract]
Net income allocation	$ 8.8	$ 9.4	$ 11.9	$ (0.3)	$ 9.1	$ 1.8	$ 5.1	$ 5.5	$ 28.8		$ 13.7		$ 9.1
Unrealized gain on fair value option									1.0		7.8		3.4
Total equity in joint venture income									29.8		21.5		12.5
Participation income allocation									$ 8.7	[1]	$ 7.9	[1]	$ 1.4	[1]

[1] See discussion above.