SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Details 2)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS
Cash payment for each ounce of gold (in dollars per ounce)	435
Canada
Geographic distribution of royalty revenue and long-lived assets (royalty and stream interests, net)
Revenue (as a percent)	34.00%	24.00%	24.00%
Royalty and stream interests, net (as a percent)	53.00%	52.00%	43.00%
Chile
Geographic distribution of royalty revenue and long-lived assets (royalty and stream interests, net)
Revenue (as a percent)	21.00%	29.00%	25.00%
Royalty and stream interests, net (as a percent)	31.00%	30.00%	35.00%
Mexico
Geographic distribution of royalty revenue and long-lived assets (royalty and stream interests, net)
Revenue (as a percent)	18.00%	19.00%	20.00%
Royalty and stream interests, net (as a percent)	7.00%	7.00%	9.00%
United States
Geographic distribution of royalty revenue and long-lived assets (royalty and stream interests, net)
Revenue (as a percent)	15.00%	17.00%	18.00%
Royalty and stream interests, net (as a percent)	3.00%	4.00%	5.00%
Australia
Geographic distribution of royalty revenue and long-lived assets (royalty and stream interests, net)
Revenue (as a percent)	4.00%	4.00%	5.00%
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 and stream interests, net)
Revenue (as a percent)	3.00%	3.00%	4.00%
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 and stream interests, net)
Revenue (as a percent)	5.00%	4.00%	4.00%
Royalty and stream interests, net (as a percent)	2.00%	3.00%	4.00%