INCOME TAXES - UNCERTAIN TAX POSITIONS (DETAILS) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Liability for unrecognized tax benefits, beginning balance	$ 1.5	$ 1.3	$ 23.7
Additions based on tax positions and settlements related to the prior year	0	0	0
Additions based on tax positions and settlements related to the current year	0.2	0.2	0.1
Reductions for tax positions of prior years	0	0	(22.5)
Lapse of statue of limitations	(1.1)	0	0
Liability for unrecognized tax benefits, ending balance	$ 0.6	$ 1.5	$ 1.3