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Material Accounting Policy Information (Tables)
 12 Months Ended
Dec. 31, 2023
Disclosure Of Material Accounting Policy Information [Abstract]  
Disclosure of subsidaries [Table Text Block]
Subsidiary  

Place of

incorporation

     Functional currency  
Eastmain Mines Inc. ("Eastmain Mines") (a)   Canada     CAD  
Eastmain Resources Inc. ("Eastmain")   ON, Canada     CAD  
Fury Gold USA Limited ("Fury Gold USA") (b)   Delaware, U.S.A.     USD  
North Country Gold Corp. ("North Country")   BC, Canada     CAD  
Disclosure of joint arrangements and investments in associates [Table Text Block]

Associates and joint

arrangement

     Ownership interest     Location    

Classification and

accounting method

  
Dolly Varden     22.030%     BC, Canada     Associate; equity method  
UMS     25.000%     BC, Canada     Associate; equity method  
ESJV     50.022%     Quebec, Canada     Joint operation  
Disclosure of estimated useful lives of property, plant and equipment [Table Text Block]
 

•   Computer equipment

 3 years
     
 

•   Machinery and equipment

 5-10 years
     
 

•   Right-of-use ("ROU") assets

 the lease term, unless the transfer of the asset ownership is reasonably certain at the end of the lease term, whereupon depreciation is over the useful life.