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FINANCIAL RISK MANAGEMENT (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of financial assets that are either past due or impaired [abstract] |
Disclosure of credit risk exposure [text block] | The Company’s maximum exposure to credit risk is as follows:
| Year ended December 31
(in millions of U.S. dollars) | 2017 | 2016
Credit risk exposure |  |
Cash and cash equivalents | 216.2 | 185.9
Trade receivables | 27.1 | 37.1
Gold price option contracts | - | 17.6
Copper forward contracts | - | 0.3
Total financial instrument exposure to credit risk | 243.3 | 240.9
Analysis of age of financial assets that are past due but not impaired [text block] | The aging of trade and other receivables is as follows:
| As at December 31
(in millions of U.S. dollars) | 0-30 days | 31-60 days | 61-90 days | 91-120 days | Over 120 days | 2017 Total | 2016 Total
Aging trade and other receivables |  |  |  |  |  |  |
Rainy River | 6.0 | 4.8 | 6.1 | - | 0.4 | 17.3 | 5.2
New Afton | (2.3) | 3.7 | - | - | - | 1.4 | 22.5
Mesquite | 0.2 | - | - | - | 0.5 | 0.7 | 0.2
Peak Mines(1) | - | - | - | - | - | - | 1.3
Cerro San Pedro | 4.3 | 0.5 | 0.5 | 0.5 | 0.5 | 6.3 | 5.5
Blackwater | 0.4 | - | - | - | - | 0.4 | 0.3
Corporate | 1.0 | - | - | - | - | 1.0 | 2.1
Total trade and other receivables | 9.6 | 9.0 | 6.6 | 0.5 | 1.4 | 27.1 | 37.1
| 1. | Trade and other receivables as at December 31, 2017 are presented excluding sales generated from Peak Mines, which has been classified as a discontinued operation for the year ended December 31, 2017.
Disclosure of detailed information about contractual maturities of debt commitments [text block] | The following table shows the contractual maturities of debt commitments. The amounts presented represent the future undiscounted principal and interest cash flows, and therefore, do not equate to the carrying amounts on the consolidated statements of financial position.
As at December 31
(in millions of U.S. dollars) | < 1 year | 1-3 years | 4-5 years | After 5 years | 2017 Total | 2016 Total
Debt commitments |  |  |  |  |  |
Trade and other payables | 153.7 | - | - | - | 153.7 | 169.2
Long-term debt | - | 230.0 | 500.0 | 300.0 | 1,030.0 | 900.0
Interest payable on long-term debt | 43.5 | 100.8 | 100.8 | 47.8 | 292.9 | 252.5
Gold stream obligation | 24.7 | 52.4 | 54.8 | 158.6 | 290.5 | 277.7
Total debt commitments | 221.9 | 383.2 | 655.6 | 506.4 | 1,767.1 | 1,599.5
Disclosure of detailed information about currencies of financial instruments and other foreign currency denominated liabilities [text block] | The currencies of the Company’s financial instruments and other foreign currency denominated liabilities, based on notional amounts, were as follows:
As at December 31, 2017
(in millions of U.S. dollars) | CAD | AUD | MXN
Exposure to currency risk |  |  |
Cash and cash equivalents | 16.6 | 5.9 | 1.5
Trade and other receivables | 19.5 | - | 6.2
Income tax receivable | 0.4 | - | 4.2
Deferred tax asset | 130.5 | - | -
Trade and other payables | (141.6) | - | (11.5)
Deferred tax liability | (183.9) | - | (0.1)
Reclamation and closure cost obligations | (84.6) | - | (11.7)
Performance share units and restricted share units | (2.6) | - | -
Total exposure to currency risk | (245.7) | 5.9 | (11.4)
As at December 31, 2016
(in millions of U.S. dollars) | CAD | AUD | MXN
Exposure to currency risk |  |  |
Cash and cash equivalents | 95.3 | 4.6 | 1.2
Trade and other receivables | 8.0 | 0.5 | 5.5
Income tax (payable) receivable | (1.1) | (4.5) | 3.1
Deferred tax asset | 173.3 | 14.0 | 0.9
Trade and other payables | (118.3) | (12.0) | (16.2)
Deferred tax liability | (321.1) | (26.1) | (0.5)
Reclamation and closure cost obligations | (36.5) | (13.6) | (12.2)
Warrants | (1.3) | - | -
Employee benefits | (1.1) | (7.9) | -
Restricted share units | (2.8) | - | -
Total exposure to currency risk | (205.6) | (45.0) | (18.2)
Disclosure of detailed information about changes in foreign exchange rates [text block] | A 10% strengthening (weakening) of the U.S. dollar against the following currencies would have decreased (increased) the Company’s net loss from the financial instruments presented by the amounts shown below.
| Year ended December 31
(in millions of U.S. dollars) | 2017 | 2016
Impact of 10% change in foreign exchange rates |  |
Canadian dollar | 24.6 | 20.5
Australian dollar | (0.6) | 4.6
Mexican peso | 1.1 | 1.8
Disclosure of detailed information about change in commodity prices [text block] | A 10% change in commodity prices would impact the Company’s net earnings before taxes and other comprehensive income before taxes as follows:
| Year ended December 31, 2017 | Year ended December 31, 2016
(in millions of U.S. dollars) | Net Earnings | Other Comprehensive Income | Net Earnings | Other Comprehensive Income
Impact of 10% change in commodity prices |  |  |  |
Gold price | 52.5 | - | 47.4 | -
Copper price | 9.0 | - | 22.1 | -
Silver price | 1.1 | - | 1.4 | -
Fuel price | 4.6 | 0.3 | 3.5 | 0.1

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