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INCOME TAXES (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Minimum threshold percentage required to recognize income tax benefit (in hundredths) 50.00%  
Gross unrecognized income tax benefits $ 38.1 $ 36.4
Unrecognized income tax benefits that would impact effective tax rate 37.6 37.1
Accrued interest and penalties related to unrecognized income tax benefits 10.5 9.8
Valuation allowance provided for deferred tax assets $ 18.4 $ 18.4