SEGMENT INFORMATION (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Canada
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	28.00%	23.00%	27.00%	23.00%
Royalty and stream interests, net (as a percent)	52.00%		52.00%		52.00%
Chile
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	23.00%	30.00%	27.00%	28.00%
Royalty and stream interests, net (as a percent)	31.00%		31.00%		30.00%
Mexico
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	20.00%	18.00%	19.00%	20.00%
Royalty and stream interests, net (as a percent)	7.00%		7.00%		7.00%
United States
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	17.00%	19.00%	15.00%	18.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%		4.00%
Australia
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	4.00%	3.00%	4.00%	3.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%		3.00%
Africa
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	3.00%	3.00%	3.00%	3.00%
Royalty and stream interests, net (as a percent)	1.00%		1.00%		1.00%
Other
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	5.00%	4.00%	5.00%	5.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%		3.00%