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CAPITAL AND FINANCIAL RISK MANAGEMENT - Currency risk management (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Currency risk |
Capital and financial risk management |
Percentage of strengthening in U.S. dollar | 10.00%
Percentage of weakening in U.S. dollar | 10.00%
Currency risk | Canadian dollars |
Capital and financial risk management |
Foreign currency net working capital | $ (13.9)
Currency risk | Brazilian reais |
Capital and financial risk management |
Foreign currency net working capital | (41.8)
Currency risk | Chilean pesos |
Capital and financial risk management |
Foreign currency net working capital | (32.1)
Currency risk | Russian roubles |
Capital and financial risk management |
Foreign currency net working capital | 22.2
Currency risk | Mauritanian ouguiya |
Capital and financial risk management |
Foreign currency net working capital | (27.6)
Currency risk | Other |
Capital and financial risk management |
Foreign currency net working capital | (2.0)
10% strengthening in U.S. dollar | Canadian dollars |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | 1.3
10% strengthening in U.S. dollar | Brazilian reais |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | 3.8
10% strengthening in U.S. dollar | Chilean pesos |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | 2.9
10% strengthening in U.S. dollar | Russian roubles |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | (2.0)
10% strengthening in U.S. dollar | Mauritanian ouguiya |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | 2.5
10% strengthening in U.S. dollar | Other |
Capital and financial risk management |
Strengthening in U.S dollar effect on earnings before taxes, gain (loss) | 0.2
10% weakening in U.S. dollar | Canadian dollars |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | (1.5)
10% weakening in U.S. dollar | Brazilian reais |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | (4.6)
10% weakening in U.S. dollar | Chilean pesos |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | (3.6)
10% weakening in U.S. dollar | Russian roubles |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | 2.5
10% weakening in U.S. dollar | Mauritanian ouguiya |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | (3.1)
10% weakening in U.S. dollar | Other |
Capital and financial risk management |
Weakening in U.S dollar effect on earnings before taxes, gain (loss) | $ (0.2)

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