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MINING INTERESTS (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [abstract] |
Disclosure of detailed information about property, plant and equipment [text block] |
Mining Properties
| Depletable | Non- depletable | Plant & equipment | Construction in progress | Exploration & evaluation | Total
(in millions of U.S. dollars) |  |  |  |  |  |
COST |  |  |  |  |  |
As at December 31, 2016 | 1,540.2 | 1,117.1 | 959.1 | 741.4 | 1.1 | 4,358.9
Additions | 88.8 | 65.8 | 44.5 | 529.7 | - | 728.8
Disposal of El Morro stream | - | (32.0) | - | - | - | (32.0)
Disposals | - | - | (17.0) | - | - | (17.0)
Impairment loss on assets held for sale (1) | (48.6) | - | - | - | - | (48.6)
Assets reclassified as held for sale (1) | (178.5) | (9.8) | (161.4) | (0.3) | - | (350.0)
Transfers ( 2) | 1,219.5 | (580.2) | 554.1 | (1,213.8) | - | (20.4)
Asset impairment | (268.4) | - | - | - | - | (268.4)
As at December 31, 2017 | 2,353.0 | 560.9 | 1,379.3 | 57.0 | 1.1 | 4,351.3
Additions | 70.8 | 23.8 | 48.3 | 72.0 | - | 214.9
Disposals | (0.4) | - | (4.8) | - | - | (5.2)
Sale of Mesquite (1) | (323.5) | - | (232.0) | (1.8) | - | (557.3)
Transfers | (0.6) | - | 0.6 | - | - | -
Asset Impairment (3) | (836.6) | (218.2) | - | - | - | (1,054.8)
As at December 31, 2018 | 1,262.7 | 366.5 | 1,191.4 | 127.2 | 1.1 | 2,948.9
ACCUMULATED DEPRECIATION |  |  |  |  |  |
As at December 31, 2016 | 734.9 | - | 432.7 | - | - | 1,167.6
Depreciation for the year | 161.7 | - | 102.5 | - | - | 264.2
Disposals | - | - | (16.2) | - | - | (16.2)
Reclassified as held for sale (1) | (159.3) | - | (105.4) | - | - | (264.7)
As at December 31, 2017 | 737.3 | - | 413.6 | - | - | 1,150.9
Depreciation for the period | 169.1 | - | 130.7 | - | - | 299.8
Disposals | (0.1) | - | (3.6) | - | - | (3.7)
Sale of Mesquite (1) | (189.3) | - | (162.2) | - | - | (351.5)
As at December 31, 2018 | 717.0 | - | 378.5 | - | - | 1,095.5
CARRYING AMOUNT |  |  |  |  |  |
As at December 31, 2017 | 1,615.7 | 560.9 | 965.7 | 57.0 | 1.1 | 3,200.4
As at December 31, 2018 | 545.7 | 366.5 | 812.9 | 127.2 | 1.1 | 1,853.4
| 1. | Refer to Note 15 for further information on discontinued operations. Mesquite was classified as an asset held-for-sale in the third quarter of 2018 and was sold in October 2018. Peak Mines was classified as an asset held-for-sale in 2017 and was sold in April 2018.
| 2. | Effective November 1, 2017, Rainy River achieved commercial production. As a result, the Company transferred amounts capitalized to construction in progress to depletable mining properties and plant & equipment and assets capitalized as non-depletable mining properties were transferred to depletable mining properties. Additionally, on November 1, 2017, the Company transferred $20.4 million related to inventories from construction in progress to current assets.
| 3. | Refer to note 10 for further information on impairment.
Disclosure of detailed information about segmented assets and liabilities [text block] | Carrying amount by property as at December 31, 2018:
| As at December 31, 2018
(in millions of U.S. dollars) | Depletable | Non- depletable | Plant & equipment | Construction in progress | Total
MINING INTEREST BY SITE |  |  |  |  |
New Afton | 421.9 | 26.1 | 191.6 | 16.4 | 656.0
Cerro San Pedro (2) | - | - | - | - | -
Rainy River | 123.8 | 14.3 | 605.0 | 110.8 | 853.9
Blackwater | - | 326.1 | 14.2 | - | 340.3
Other (1) | - | 1.1 | 2.1 | - | 3.2
Carrying amount as at December 31, 2018 | 545.7 | 367.6 | 812.9 | 127.2 | 1,853.4
| 1. | Other includes corporate balances and exploration properties.
| 2. | Cerro San Pedro transitioned to the reclamation phase of its mine life cycle on December 31, 2018. As a result, Cerro San Pedro’s mining interests are fully amortized as at December 31, 2018.
Carrying amount by property as at December 31, 2017:
| As at December 31, 2017
(in millions of U.S. dollars) | Depletable | Non- depletable | Plant & equipment | Construction in progress | Total
MINING INTEREST BY SITE |  |  |  |  |
New Afton | 521.8 | 22.9 | 225.7 | 15.1 | 785.5
Mesquite | 150.0 | - | 83.5 | 2.7 | 236.2
Cerro San Pedro | 0.6 | - | - | - | 0.6
Rainy River | 948.1 | 0.5 | 633.6 | 39.2 | 1,621.4
Blackwater | - | 537.5 | 14.6 | - | 552.1
Other (1) | - | 1.1 | 3.5 | - | 4.6
Carrying amount as at December 31, 2017 | 1,620.5 | 562.0 | 960.9 | 57.0 | 3,200.4
| 1. | Other includes corporate balances and exploration properties.

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