XML 116 R76.htm IDEA: XBRL DOCUMENT v3.25.1
Decommissioning Liabilities (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Asset Retirement Obligation Disclosure [Line Items]    
Estimated reclamation discount rate 3.30% 3.00%
Closure cost obligations discount rate 8.60% 7.40%
Decommissioning liabilities $ 193.8 $ 165.2
Bottom of range    
Asset Retirement Obligation Disclosure [Line Items]    
Inflation rate 1.80% 1.70%
Top of range    
Asset Retirement Obligation Disclosure [Line Items]    
Inflation rate 3.70% 3.60%