ACCRUED LIABILITIES (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities, Current [Abstract]
Accrued compensation and payroll taxes	$ 49.6	$ 42.7
Accrued employee benefits	28.3	43.7
Environmental (current portion only)	21.0	31.0
Legal and professional costs	21.8	24.4
Asset retirement obligation (current portion only)	21.3	12.0
Earn out	23.2	18.6
Other	63.3	64.8
Accrued liabilities	$ 228.5	$ 237.2