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FINANCIAL RISK MANAGEMENT (Details 2) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
DEBT COMMITMENTS |  |
Trade and other payables | $ 130.9 | $ 178.2
Long-term debt | 780.5 | 1,007.7
Interest payable on long-term debt | 242.9 | 292.9
Gold stream obligation | 267.5 | 290.5
Total debt commitments | 1,423.0 | 1,767.1
Payable Excluding Current Portion Of Gold Stream Obligation [Member] |  |
DEBT COMMITMENTS |  |
Trade and other payables | 112.6 | 153.7
Principle of Long Term Debt [Member] |  |
DEBT COMMITMENTS |  |
Long-term debt | 800.0 | $ 1,030.0
Less than 1 year |  |
DEBT COMMITMENTS |  |
Trade and other payables | 112.6 |
Long-term debt | 0.0 |
Interest payable on long-term debt | 50.3 |
Gold stream obligation | 19.2 |
Total debt commitments | 182.1 |
1-3 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 0.0 |
Interest payable on long-term debt | 100.8 |
Gold stream obligation | 43.5 |
Total debt commitments | 144.3 |
4-5 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 500.0 |
Interest payable on long-term debt | 65.5 |
Gold stream obligation | 55.2 |
Total debt commitments | 620.7 |
More than 5 years |  |
DEBT COMMITMENTS |  |
Trade and other payables | 0.0 |
Long-term debt | 300.0 |
Interest payable on long-term debt | 26.3 |
Gold stream obligation | 149.6 |
Total debt commitments | $ 475.9 |

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