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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 9 Months Ended
Oct. 31, 2009
Mar. 31, 2013
Canadian Minerals Partnership
Mar. 31, 2013
Altius
Mar. 31, 2013
Voisey's Bay Holding Corporation
Mar. 31, 2013
Tulsequah
Percentage of ownership interest          
Remaining commitment amount         $ 50
Percentage of ownership interest held in Labrador Nickel Royalty Limited Partnership ("LNRLP")   89.99% 10.00% 0.01%  
Commitments and Contingencies          
Minimum damage amount claimed by Labrador Nickel Royalty Limited Partnership ("LNRLP") $ 29