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ACCRUED LIABILITIES (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Accrued Liabilities, Current [Abstract]    
Accrued compensation and payroll taxes $ 51.1 $ 49.6
Accrued employee benefits 35.3 28.3
Environmental (current portion only) 18.0 21.0
Legal and professional costs 23.4 21.8
Asset retirement obligation (current portion only) 13.5 21.3
Earn out 26.7 23.2
Other 76.5 63.3
Accrued liabilities $ 244.5 $ 228.5