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Debt - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 24, 2023
May 31, 2022
Jun. 30, 2021
Dec. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]              
Net repayments       $ 160.0    
Interest expense       $ 35.3 43.1    
Senior note maturing December 2027              
Disclosure of detailed information about borrowings [line items]              
Interest rate on borrowings       4.625%      
Borrowings outstanding       $ 275.9 273.8   $ 0.0
Senior note maturing August 2031              
Disclosure of detailed information about borrowings [line items]              
Interest rate on borrowings       2.63%      
Borrowings outstanding       $ 419.5 $ 409.8   0.0
SL-Credit Facility              
Disclosure of detailed information about borrowings [line items]              
Effective interest rate         5.70%    
Notional amount       750.0      
Accordion feature       250.0      
Borrowings outstanding       0.0 $ 0.0   $ 160.0
Standby charges on undrawn amounts       2.0 2.0    
SL-Credit Facility | Bottom of range              
Disclosure of detailed information about borrowings [line items]              
Stand-by fee percentage 0.23%            
SL-Credit Facility | Top of range              
Disclosure of detailed information about borrowings [line items]              
Stand-by fee percentage 0.46%            
Construction Loans              
Disclosure of detailed information about borrowings [line items]              
Borrowings outstanding       $ 13.4 $ 20.1    
June 2021 Loan              
Disclosure of detailed information about borrowings [line items]              
Interest rate on borrowings       3.60%      
Borrowings, term     5 years        
May 2022 Loan              
Disclosure of detailed information about borrowings [line items]              
Interest rate on borrowings       2.20%      
Borrowings, term   5 years          
Yamana              
Disclosure of detailed information about borrowings [line items]              
Borrowings recognized as of acquisition date           $ 927.6  
Yamana | Senior notes              
Disclosure of detailed information about borrowings [line items]              
Borrowings recognized as of acquisition date           $ 675.2  
Effective interest rate           5.52%  
Yamana | Senior note maturing December 2027              
Disclosure of detailed information about borrowings [line items]              
Borrowings recognized as of acquisition date           $ 283.0  
Interest rate on borrowings           4.625%  
Yamana | Senior note maturing August 2031              
Disclosure of detailed information about borrowings [line items]              
Borrowings recognized as of acquisition date           $ 500.0  
Interest rate on borrowings           2.63%  
SOFR | SL-Credit Facility | Bottom of range              
Disclosure of detailed information about borrowings [line items]              
Adjustment to base interest rate 1.25%            
SOFR | SL-Credit Facility | Top of range              
Disclosure of detailed information about borrowings [line items]              
Adjustment to base interest rate 2.40%            
Bank of Nova Scotia's Base Rate | SL-Credit Facility | Bottom of range              
Disclosure of detailed information about borrowings [line items]              
Adjustment to base interest rate 0.15%            
Bank of Nova Scotia's Base Rate | SL-Credit Facility | Top of range              
Disclosure of detailed information about borrowings [line items]              
Adjustment to base interest rate 1.30%