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Debt - Additional Information (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Nov. 24, 2023
Dec. 31, 2022
May 31, 2022
Jun. 30, 2021
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2023
Mar. 30, 2023
Mar. 29, 2023
Dec. 31, 2021
Disclosure of detailed information about borrowings [line items]                    
Net repayments         $ 160.0 $ 0.0        
Interest expense         43.1 1.5        
Senior note maturing December 2027                    
Disclosure of detailed information about borrowings [line items]                    
Interest rate on borrowings             4.625%      
Borrowings outstanding   $ 0.0     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   0.0     $ 409.8 0.0        
SL-Credit Facility                    
Disclosure of detailed information about borrowings [line items]                    
Effective interest rate         5700.00%          
Notional amount $ 750.0       $ 750.0     $ 750.0 $ 500.0  
Accordion feature $ 250.0                  
Borrowings outstanding   160.0     0.0 160.0       $ 0.0
Standby charges on undrawn amounts         2.0 2.2        
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%                  
SL-Credit Facility, term loan                    
Disclosure of detailed information about borrowings [line items]                    
Notional amount               $ 500.0    
Construction Loans                    
Disclosure of detailed information about borrowings [line items]                    
Borrowings outstanding   $ 33.7     $ 20.1 $ 33.7        
Promissory notes                    
Disclosure of detailed information about borrowings [line items]                    
Interest rate on borrowings         5.60%          
Borrowings, term   30 days                
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 revolving credit facility                    
Disclosure of detailed information about borrowings [line items]                    
Net repayments         $ 205.0          
Yamana                    
Disclosure of detailed information about borrowings [line items]                    
Borrowings recognized as of acquisition date         $ 927.6   $ 943.1      
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%