PROVISION FOR INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Tax Examination [Line Items]
Reversal of related unrecognized tax benefits			$ 26.9
Net One Time Charge for Settlement with the Tax Authorities			15.7
Effective income tax rate	174.70%	22.30%	98.50%	20.60%
Federal statutory tax rate			35.00%
Unrecognized tax benefits that if recognized would affect income-tax rate	10.1		10.1		34.9
Realization of unrecognized tax benefits			26.8
Unrecognized tax benefits, including interest and penalties	0.5		0.5		4.4
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
One time charge from income tax exmination			44.8
Federal [Member]
Income Tax Examination [Line Items]
Income tax provision from tax examination, net of interest			35.0
Federal income taxes, interest			5.7
State [Member]
Income Tax Examination [Line Items]
One time charge from income tax exmination			4.1
Reduction of valuation allowance on deferred tax assets			2.2
IRS Tax Examination Settlement [Member]
Income Tax Examination [Line Items]
Federal income taxes, interest			8.7
IRS Tax Examination Settlement [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income tax examination, years under examination			2003 through 2006
One-time payment of taxes and interest from income tax examination	42.6		42.6
IRS Tax Examination Settlement [Member] | State [Member]
Income Tax Examination [Line Items]
One-time payment of taxes and interest from income tax examination	$ 0.3		$ 0.3