ADDITIONAL BALANCE SHEET INFORMATION (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Reclamation liability [Abstract]
Balance at beginning of period	$ 9.5	$ 9.3
Settlement of obligations	(2.3)	(3.1)
Liabilities incurred and accretion expense	1.8	3.8
Foreign currency	(0.6)	(0.1)
Balance at end of period	$ 8.4	$ 9.9