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Major Group Investments Direct and Indirect - Summary of Share Held in Investments in Associates Joint Ventures other Equity Investments and Percentage of Beneficial Interest (Detail) - shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Rusoro Mining Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed associates, group beneficial interest 24.80% 25.70%  
Lunnon Metals Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed associates, group beneficial interest 33.96% 31.65%  
Far Southeast Gold Resources Incorporated ("FSE")      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Interest in joint venture 40.00% 40.00% 40.00%
Listed equity investments | Galiano Gold Inc. (formerly Asanko Gold Inc.)      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 21,971,657 21,971,657  
Listed equity investments, group beneficial interest 9.80% 9.80%  
Listed equity investments | Torq Resources Inc      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 15,000,000 0  
Listed equity investments, group beneficial interest 15.00% 0.00%  
Listed equity investments | Tesoro Gold Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 163,227,850 0  
Listed equity investments, group beneficial interest 14.90% 0.00%  
Listed equity investments | Hamelin Gold Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 11,000,000 11,000,000  
Listed equity investments, group beneficial interest 10.00% 10.00%  
Listed equity investments | RareX Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 710,592 710,592  
Listed equity investments, group beneficial interest 0.10% 0.20%  
Listed equity investments | Consolidated Woodjam Copper Corporation      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 0 16,115,740  
Listed equity investments, group beneficial interest 0.00% 13.30%  
Listed equity investments | Vizsla Copper Corporation      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 4,950,853 0  
Listed equity investments, group beneficial interest 7.30% 0.00%  
Listed equity investments | Lefroy Exploration Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 21,613,910 21,613,910  
Listed equity investments, group beneficial interest 13.60% 15.00%  
Listed equity investments | Magmatic Resources Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 19,200,000 19,200,000  
Listed equity investments, group beneficial interest 6.50% 7.50%  
Listed equity investments | Orsu Metals Corp      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 2,613,491 2,613,491  
Listed equity investments, group beneficial interest 6.00% 6.00%  
Listed equity investments | Chakana Copper Corp      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 30,411,700 22,270,791  
Listed equity investments, group beneficial interest 17.90% 19.90%  
Listed equity investments | Amarc Resources Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed equity investments, shares held 5,000,000 5,000,000  
Listed equity investments, group beneficial interest 2.70% 2.80%  
Listed associates | Rusoro Mining Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed associates, shares held 140,000,001 140,000,001  
Listed associates, group beneficial interest 24.80% 25.70%  
Listed associates | Lunnon Metals Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Listed associates, shares held 66,216,438 44,711,062  
Listed associates, group beneficial interest 34.00% 31.70%  
Joint ventures | Far Southeast Gold Resources Incorporated ("FSE")      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Joint ventures, shares held 1,737,699 1,737,699  
Interest in joint venture 40.00% 40.00%  
Joint ventures | Asanko Gold Ghana Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Joint ventures, shares held 450,000,000 450,000,000  
Interest in joint venture 45.00% 45.00%  
Joint ventures | Adansi Gold Company Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Joint ventures, shares held 100,000 100,000  
Interest in joint venture 50.00% 50.00%  
Joint ventures | Shika Group Finance Limited      
Disclosure of Investments in Associates Joint Venture and Other Equity Investments [line items]      
Joint ventures, shares held 10,000 10,000  
Interest in joint venture 50.00% 50.00%