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Financial risk management - Liquidity risk (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
DEBT COMMITMENTS |  |
Trade and other payables | $ 172.9 | $ 158.0
Long-term debt | 491.0 | 489.2
Interest payable on long-term debt | 202.4 | 238.8
Total debt commitments | 1,658.8 | 1,608.8
New Afton |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 625.3 | 541.8
Gold stream obligation |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 203.4 | 219.0
Accounts Payable excluding current portion of Gold Stream Obligation |  |
DEBT COMMITMENTS |  |
Trade and other payables | 127.7 | 109.2
Principle of Long Term Debt |  |
DEBT COMMITMENTS |  |
Long-term debt | 500.0 | $ 500.0
Less than 1 year |  |
DEBT COMMITMENTS |  |
Trade and other payables | 127.7 |
Long-term debt | 0.0 |
Interest payable on long-term debt | 36.4 |
Total debt commitments | 207.6 |
Less than 1 year | New Afton |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 12.9 |
Less than 1 year | Gold stream obligation |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 30.6 |
Between 1 and 3 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 100.0 |
Interest payable on long-term debt | 72.8 |
Total debt commitments | 281.2 |
Between 1 and 3 years | New Afton |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 40.7 |
Between 1 and 3 years | Gold stream obligation |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 67.7 |
4-5 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 400.0 |
Interest payable on long-term debt | 63.2 |
Total debt commitments | 698.8 |
4-5 years | New Afton |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 175.1 |
4-5 years | Gold stream obligation |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 60.5 |
After 5 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 0.0 |
Interest payable on long-term debt | 30.0 |
Total debt commitments | 471.2 |
After 5 years | New Afton |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | 396.6 |
After 5 years | Gold stream obligation |  |
DEBT COMMITMENTS |  |
Non-current financial liabilities | $ 44.6 |

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