CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME (UNADITED) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUES
Molybdenum sales	$ 112.7	$ 109.6	$ 217.4	$ 219.2
Tolling, calcining and other	5.1	3.9	9.1	7.9
Total revenues	117.8	113.5	226.5	227.1
Cost of sales
Operating expenses	73.8	110.6	142.4	210.2
Depreciation, depletion and amortization	17.5	11.5	30.3	31.1
Total cost of sales	91.3	122.1	172.7	241.3
Selling and marketing	2.7	2.2	5.0	4.1
Accretion expense	0.6	0.6	1.4	1.1
General and administrative	5.5	6.4	12.6	14.1
Exploration	0.5	0.6	0.6	1.4
Total costs and expenses	100.6	131.9	192.3	262.0
OPERATING INCOME (LOSS)	17.2	(18.4)	34.2	(34.9)
OTHER (INCOME) AND EXPENSE
Change in fair value of common stock purchase warrants	0	(1.9)	0	(1.8)
Loss on foreign exchange	34.8	7.9	54.2	1.3
Interest and finance fees	0.1	1.5	0.2	3.0
Interest income	0.3	0.2	0.5	0.4
Other	0.2	0.1	0.2	0.4
Total other expense and (income)	34.4	7.2	53.7	1.7
(Loss) income before income and mining taxes	(17.2)	(25.6)	(19.5)	(36.6)
Income and mining tax expense (benefit)	2.0	(10.8)	(1.2)	(22.9)
NET LOSS	(19.2)	(14.8)	(18.3)	(13.7)
COMPREHENSIVE LOSS
Foreign currency translation	(47.8)	(35.0)	(73.9)	(7.6)
Total other comprehensive loss	(47.8)	(35.0)	(73.9)	(7.6)
Total comprehensive (loss) income	$ (67.0)	$ (49.8)	$ (92.2)	$ (21.3)
NET (LOSS) INCOME PER SHARE
Basic (in dollars per share)	$ (0.11)	$ (0.09)	$ (0.11)	$ (0.08)
Diluted (in dollars per share)	$ (0.11)	$ (0.09)	$ (0.11)	$ (0.08)
Weighted-average number of common shares
Basic (in shares)	171.1	168.2	170.4	168.1
Diluted (in shares)	171.1	168.2	170.4	168.1