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Supplemental Cash Flow Information (Other Non-cash Items) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Cash Flow Statement [Abstract] |  |
Unrealized gains on non-hedged derivatives | $ (0.4) | $ (0.7)
Reclamation activities | (1.2) | (3.5)
Adjustments for interest income | 1.3 | 1.5
Adjustments for increase (decrease) in insurance, reinsurance and investment contract liabilities | (2.0) | (1.7)
Distribution of Share Based Compensation | (5.7) | (3.5)
Reduction of Obligation to Renounce Flow Through Exploration Costs | 0.0 | (1.0)
Loss on disposal of assets | 1.5 | 1.0
Other | 3.4 | 2.8
Other adjustments for non-cash items | $ (3.1) | $ (5.1)

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