COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		0 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Jun. 30, 2014 Canadian Minerals Partnership	Jun. 30, 2014 Altius	Oct. 16, 2009 Voisey's Bay Holding Corporation	Jun. 30, 2014 Voisey's Bay Holding Corporation	Jun. 30, 2014 Phoenix	Sep. 30, 2013 Mt. Milligan	Jun. 30, 2014 Mt. Milligan	Jun. 30, 2014 Tulsequah
Commitments and Contingencies
Final commitment payment made						$ 12.9	$ 781.5
Remaining commitment amount					45.0		0	45.0
Percentage of ownership interest held in Labrador Nickel Royalty Limited Partnership ("LNRLP")	89.99%	10.00%		0.01%
Minimum damage amount claimed by Labrador Nickel Royalty Limited Partnership ("LNRLP")			$ 29