COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		0 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
	Mar. 31, 2014 Canadian Minerals Partnership	Mar. 31, 2014 Altius	Oct. 16, 2009 Voisey's Bay Holding Corporation	Mar. 31, 2014 Voisey's Bay Holding Corporation	Mar. 31, 2014 Phoenix	Sep. 30, 2013 Mt. Milligan	Mar. 31, 2014 Mt. Milligan	Mar. 31, 2014 Tulsequah
Commitments and Contingencies
Final commitment payment made						$ 12.9
Remaining commitment amount					45.0		0	50.0
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