Financial Instruments and Risk Management (Derivative Instrument Not Designated as Cash Flow Hedged Narrative) (Details) $ in Millions |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2024
USD ($)
$ / oz
|
Dec. 31, 2023
USD ($)
|
|
| Disclosure of detailed information about hedged items [line items] | ||
| Average realized price per ounce | $ / oz | 1,950 | |
| Unrealized loss on commodity derivatives | $ 24.2 | $ 0.9 |
| Expense relating to variable lease payments not included in measurement of lease liabilities | 131.9 | 104.2 |
| Derivatives | Gold Options | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Financial assets, at fair value | (0.8) | |
| Gold Options | Derivatives | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Financial liabilities, at fair value | 0.0 | |
| Gold Options | Commodity price risk | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Unrealized loss on commodity derivatives | (9.3) | (0.1) |
| Fair value adjustment on contingent consideration | $ 24.2 | $ 0.9 |