XML 373 R115.htm IDEA: XBRL DOCUMENT v3.23.1
Royalties - Summary of Royalties (Detail)
 12 Months Ended
Dec. 31, 2022
USD ($)
Times
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Disclosure of information about royalty arrangements [line items]      
Total royalties $ (110,400,000) $ (112,400,000) $ (105,000,000.0)
Range 1 | Gold royalty      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 3.00%    
Range 2 | Gold royalty      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 3.50%    
Range 3 | Gold royalty      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 4.10%    
Range 4 | Gold royalty      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 5.00%    
Top of range | Range 1      
Disclosure of information about royalty arrangements [line items]      
Average gold price $ 1,299.99    
Top of range | Range 2      
Disclosure of information about royalty arrangements [line items]      
Average gold price 1,449.99    
Top of range | Range 3      
Disclosure of information about royalty arrangements [line items]      
Average gold price 2,299.99    
Bottom of range | Range 1      
Disclosure of information about royalty arrangements [line items]      
Average gold price 0    
Bottom of range | Range 2      
Disclosure of information about royalty arrangements [line items]      
Average gold price 1,300    
Bottom of range | Range 3      
Disclosure of information about royalty arrangements [line items]      
Average gold price 1,450    
Bottom of range | Range 4      
Disclosure of information about royalty arrangements [line items]      
Average gold price 2,300    
South Africa      
Disclosure of information about royalty arrangements [line items]      
Total royalties $ (2,900,000) $ (2,600,000) $ (2,000,000.0)
Royalty rates 0.50% 0.50% 0.50%
Gold refining percentage 99.50%    
Number of times gross revenue | Times 12.5    
Additional percentage 0.50%    
South Africa | Top of range      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 5.00%    
Peru      
Disclosure of information about royalty arrangements [line items]      
Total royalties $ (5,900,000) $ (8,000,000.0) $ (5,600,000)
Royalty rates 4.20% 4.40% 3.90%
Peru | Top of range      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 12.00%    
Peru | Bottom of range      
Disclosure of information about royalty arrangements [line items]      
Royalty rate 1.00%    
Ghana      
Disclosure of information about royalty arrangements [line items]      
Total royalties $ (54,800,000) $ (55,800,000) $ (53,200,000)
Royalty rates 4.10% 4.10% 4.10%
Australia      
Disclosure of information about royalty arrangements [line items]      
Total royalties $ (46,800,000) $ (46,000,000.0) $ (44,200,000)
Royalty rates 2.50% 2.50% 2.50%