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Commitments - Disclosure of detailed information about significant commitments for streams and offtakes (Details)
 12 Months Ended
Dec. 31, 2021
Amulsar stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement 40 years
Amulsar stream [Member] | Gold [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 4.22%
Per ounce/carat price 400
Amulsar stream [Member] | Silver [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 62.50%
Per ounce/carat price 4
Amulsar offtake [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement Until delivery of2,110,425 ounces Au
Amulsar offtake [Member] | Gold [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 81.91%
Per ounce/carat price Based onquotational period
Back Forty stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement Life of mine
Back Forty stream [Member] | Gold [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 18.50%
Per ounce/carat price 30% spot price(max $600)
Back Forty stream [Member] | Silver [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 85.00%
Per ounce/carat price 4
Mantos Blancos stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement Life of mine
Mantos Blancos stream [Member] | Silver [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 100.00%
Per ounce/carat price 8% spot
Renard stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement 40 years
Renard stream [Member] | Diamond [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 9.60%
Per ounce/carat price Lesser of40% of salesprice or $40
Sasa stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement 40 years
Sasa stream [Member] | Silver [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 100.00%
Per ounce/carat price 5
Gibraltar stream [Member]  
Disclosure Of Commitments [Line Items]  
Term of agreement Life of mine
Gibraltar stream [Member] | Silver [Member]  
Disclosure Of Commitments [Line Items]  
Attributable payable production to be purchased, percentage 75.00%
Per ounce/carat price nil