ACQUISITIONS (Details) $ / shares in Units, shares in Millions											1 Months Ended	12 Months Ended
	Jul. 01, 2016 USD ($) payment	Dec. 30, 2015 USD ($)	Sep. 29, 2015 USD ($) oz	Jul. 28, 2015 USD ($) oz $ / shares shares	Jul. 20, 2015 USD ($) oz	Jul. 09, 2015 USD ($) km oz	Jan. 08, 2015 USD ($)	Oct. 20, 2014 USD ($) item oz	Sep. 30, 2014 USD ($)	Jan. 12, 2010 oz	Nov. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Acquisition of Royalty Interest in Mineral Properties
Carrying value												$ 3,551,575,000	$ 2,647,976,000
Stream and royalty interests, net												2,848,087,000	2,083,608,000
Chile
Acquisition of Royalty Interest in Mineral Properties
Stream and royalty interests, net												823,525,000	$ 653,019,000
Peak Gold | Royal Alaska
Acquisition of Royalty Interest in Mineral Properties
Fair value of non-controlling interest												45,700,000
Carmen de Andacollo | RG Chile
Acquisition of Royalty Interest in Mineral Properties
Stream and royalty interests, net						$ 207,500,000
Carmen de Andacollo | Stream and royalty interests, net | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Carrying value						$ 388,200,000
Ilovica | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount								$ 175,000,000
Number of installments | item								2
Feasibility costs								$ 15,000,000
Construction costs								$ 160,000,000
Ilovica | RGLD Gold | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired								25.00%
Gold delivered (in ounces) | oz								525,000
Ilovica | RGLD Gold | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired								12.50%
Purchase price per ounce of gold as percentage of spot price at the time of delivery								25.00%
Ilovica | RGLD Gold | First Condition
Acquisition of Royalty Interest in Mineral Properties
Feasibility costs								$ 7,500,000
Ilovica | RGLD Gold | Second Condition
Acquisition of Royalty Interest in Mineral Properties
Feasibility costs								$ 7,500,000
Payment of aggregate pre-production commitment											$ 3,750,000
Remaining consideration payable												3,750,000
Ilovica | Stream and royalty interests, net | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Cash paid for acquisition of royalty interests												11,250,000
Tetlin
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount									$ 6,000,000
Tetlin | NSR Royalty Option 1
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired									2.00%
Tetlin | NSR Royalty Option 2
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired									3.00%
Tetlin | Royal Alaska
Acquisition of Royalty Interest in Mineral Properties
Payments to acquire interest in joint venture												$ 5,700,000
Tetlin | Peak Gold
Acquisition of Royalty Interest in Mineral Properties
Membership interest controlled												11.00%
Tetlin | Peak Gold | Royal Alaska
Acquisition of Royalty Interest in Mineral Properties
Payments to acquire interest in joint venture							$ 5,000,000
Minimum percentage of membership interest required to be manager												40.00%
Tetlin | Peak Gold | Royal Alaska | Maximum
Acquisition of Royalty Interest in Mineral Properties
Percentage of membership interest that can be obtained							40.00%
Amount that can be contributed to purchase membership interest							$ 30,000,000
Tetlin | Peak Gold | Contango
Acquisition of Royalty Interest in Mineral Properties
Membership interest controlled							100.00%
BGC | Pueblo Viejo | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Ownership interest (as a percent)			60.00%
Total purchase amount			$ 610,000,000
Purchase price per ounce of gold as percentage of spot price at the time of delivery			60.00%
Purchase price per ounce of silver as percentage of spot price at the time of delivery			60.00%
BGC | Pueblo Viejo | RGLD Gold | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired			7.50%
Gold delivered (in ounces) | oz			990,000
Percentage of silver royalty interests acquired			75.00%
Percentage of minimum silver recovery			70.00%
Maximum quantity of silver with specified purchase price (in ounces) | oz			50,000,000
BGC | Pueblo Viejo | RGLD Gold | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired			3.75%
Percentage of silver royalty interests acquired			37.50%
BGC | Pueblo Viejo | RGLD Gold | First Condition
Acquisition of Royalty Interest in Mineral Properties
Gold delivered (in ounces) | oz			550,000
Purchase price per ounce of gold as percentage of spot price at the time of delivery			30.00%
Maximum quantity of silver with specified purchase price (in ounces) | oz			23,100,000
Purchase price per ounce of silver as percentage of spot price at the time of delivery			30.00%
BGC | Pueblo Viejo | Stream and royalty interests, net | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount												$ 610,000,000
Golden Star
Acquisition of Royalty Interest in Mineral Properties
Gross loans				$ 20,000,000
Term of loan				4 years
Number of shares of common stock that can be purchased by the warrants | shares				5
Grant date fair value on exercise of warrants				$ 800,000
Quarterly interest rate based on average gold rate divided by 10,000				62.50%
Denominator used in calculation of quarterly interest rate				$ 10,000
Term of warrants				4 years
Exercise price of warrants | $ / shares				$ 0.27
Golden Star | Maximum
Acquisition of Royalty Interest in Mineral Properties
Interest rate (as a percent)				11.50%
Golden Star | Wassa and Prestea | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount		$ 145,000,000		$ 130,000,000
Additional investment		$ 15,000,000
Gross loans				$ 20,000,000
Term of loan				4 years
Cash paid for acquisition of royalty interests	$ 20,000,000
Number of installments | payment	2
First Installment Scheduled Payment	$ 20,000,000
Second Installment Scheduled Payment	$ 10,000,000
Golden Star | Wassa and Prestea | RGLD Gold | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired				9.25%
Gold delivered (in ounces) | oz				240,000
Golden Star | Wassa and Prestea | RGLD Gold | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired				10.50%
Golden Star | Wassa and Prestea | RGLD Gold | First Condition
Acquisition of Royalty Interest in Mineral Properties
Purchase price per ounce of gold as percentage of spot price at the time of delivery				20.00%
Golden Star | Wassa and Prestea | RGLD Gold | Subsequent Two Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired				5.50%
Golden Star | Wassa and Prestea | RGLD Gold | Second Condition
Acquisition of Royalty Interest in Mineral Properties
Purchase price per ounce of gold as percentage of spot price at the time of delivery				30.00%
Golden Star | Wassa and Prestea | Stream and royalty interests, net | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount												95,000,000
Cash paid for acquisition of royalty interests												95,000,000
New Gold Inc | Rainy River | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount					$ 175,000,000
Cash paid for acquisition of royalty interests					100,000,000
Installment payable upon meeting capital spending requirement					$ 75,000,000
Capital spending requirement (as a percent)					60.00%
New Gold Inc | Rainy River | RGLD Gold | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired					6.50%
Gold delivered (in ounces) | oz					230,000
Percentage of silver royalty interests acquired					60.00%
Maximum quantity of silver with specified purchase price (in ounces) | oz					3,100,000
New Gold Inc | Rainy River | RGLD Gold | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired					3.25%
Purchase price per ounce of gold as percentage of spot price at the time of delivery					25.00%
Percentage of silver royalty interests acquired					30.00%
Purchase price per ounce of silver as percentage of spot price at the time of delivery					25.00%
New Gold Inc | Rainy River | Stream and royalty interests, net | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount												$ 100,000,000
CMCA | Teck
Acquisition of Royalty Interest in Mineral Properties
Ownership interest (as a percent)						90.00%
CMCA | Carmen de Andacollo | RGLD Gold
Acquisition of Royalty Interest in Mineral Properties
Cash paid for acquisition of royalty interests						$ 525,000,000
Percentage of produced payable gold to be purchased have been delivered						100.00%
Percentage of produced payable gold to be purchased after 135,000 ounces have been delivered						50.00%
Fixed percentage of produced gold payable (as a percent)						89.00%
Purchase price per ounce as a percentage of monthly average gold price for the month preceding the delivery date						15.00%
CMCA | Carmen de Andacollo | RGLD Gold | Chile
Acquisition of Royalty Interest in Mineral Properties
Maximum quantity of gold with specified purchase price (in ounces) | oz						900,000
CMCA | Carmen de Andacollo | RGLD Gold | Maximum
Acquisition of Royalty Interest in Mineral Properties
Area of mining to be eligible for concessions | km						1.5
CMCA | Carmen de Andacollo | RG Chile
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount						$ 345,000,000
CMCA | Carmen de Andacollo | RG Chile | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired										75.00%
Gold delivered (in ounces) | oz										910,000
CMCA | Carmen de Andacollo | RG Chile | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired										50.00%