SEGMENT INFORMATION (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2013
Canada
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	35.00%	26.00%	30.00%	24.00%
Royalty and stream interests, net (as a percent)	53.00%		53.00%		52.00%
Chile
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	19.00%	32.00%	24.00%	29.00%
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)	18.00%	17.00%	19.00%	19.00%
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)	16.00%	15.00%	15.00%	17.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%		4.00%
Africa
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	5.00%	3.00%	4.00%	3.00%
Royalty and stream interests, net (as a percent)	1.00%		1.00%		1.00%
Australia
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	3.00%	3.00%	4.00%	3.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%		3.00%
Other
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	4.00%	4.00%	4.00%	5.00%
Royalty and stream interests, net (as a percent)	2.00%		2.00%		3.00%