v3.25.2
Acquisitions and Other Transactions - Acquisitions of Royalty on Cote Gold Mine - Ontario, Canada (Details)
$ in Millions
Jun. 24, 2025
USD ($)
tranche
IAMGOLD Corporation | IAMGOLD | Ct Gold Mine  
Acquisitions  
Ownership interest 70.00%
IAMGOLD Corporation | Sumitomo | Ct Gold Mine  
Acquisitions  
Ownership interest 30.00%
Royalty on Ct Gold Mine - Ontario, Canada  
Acquisitions  
Cash transferred $ 1,050.0
Percentage of gross margin royalty acquired 7.50%
Maximum royalty percentage to be bought back 50.00%
Number of tranches for repurchase | tranche 2
Percentage of royalty to be bought back in each tranche 25.00%
Purchase price $ 262.5
Royalty on Ct Gold Mine - Ontario, Canada | Initial tranche  
Acquisitions  
Percentage of royalty to be bought back in each tranche 25.00%
Maximum exercisable term 2 years
Royalty on Ct Gold Mine - Ontario, Canada | Initial tranche | SOFR  
Acquisitions  
Adjustments to reference rate to determine repurchase cost 1.10%
Royalty on Ct Gold Mine - Ontario, Canada | Subsequent tranche  
Acquisitions  
Percentage of royalty to be bought back in each tranche 25.00%
Maximum exercisable term 3 years
Percentage of internal rate of returns cost to repurchase 10.00%
Royalty on Ct Gold Mine - Ontario, Canada | Bottom  
Acquisitions  
Percentage of exercise price of buy-back option calculated value 25.00%