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v3.20.4

Mineral Property, Pland and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [abstract] |
Disclosure of detailed information about property, plant and equipment | Amortization rates applicable to each category of property, plant and equipment, with the exception of land, are as follows:
Asset | Useful life
Leasehold improvements | Lease term
Mobile equipment | 2-10 years
Other equipment | 2-20 years
Processing plant | Unit-of-production
Shaft, underground infrastructure and mineral properties | Unit-of-production
Vehicles | 3-7 years
Buildings | 7-20 years
Office equipment | 2-8 years
|  | Mineral property |  |
| Plant and equipment | Depletable | Non-depletable | Exploration and evaluation | Total
Cost |  |  |  |  |
At December 31, 2018 | $1,194.6 |  | $2,305.6 |  | $95.8 |  | $250.4 |  | $3,846.4 |
Additions | 125.2 |  | 131.9 |  | 9.1 |  | 11.6 |  | 277.8 |
Revisions to decommissioning liabilities | — |  | 13.3 |  | — |  | — |  | 13.3 |
Right-of-use assets | 2.4 |  | — |  | — |  | — |  | 2.4 |
Disposals | (1.9) |  | — |  | — |  | — |  | (1.9) |
At December 31, 2019 | $1,320.3 |  | $2,450.8 |  | $104.9 |  | $262.0 |  | $4,138.0 |
Additions | 94.1 |  | 101.5 |  | 33.2 |  | 14.2 |  | 243.0 |
Acquisition of Trillium Mining Corp. (i) | — |  | — |  | — |  | 19.3 |  | 19.3 |
Repurchase of Island Gold royalty (ii) | — |  | 54.8 |  | — |  | — |  | 54.8 |
Revisions to decommissioning liabilities | — |  | 17.1 |  | — |  | — |  | 17.1 |
Disposals | (5.6) |  | — |  | — |  | — |  | (5.6) |
Transfers | 121.2 |  | — |  | (121.2) |  | — |  | — |
At December 31, 2020 | $1,530.0 |  | $2,624.2 |  | $16.9 |  | $295.5 |  | $4,466.6 |
Accumulated amortization and impairment charges |  |  |
At December 31, 2018 | $502.9 |  | $521.4 |  | $— |  | $8.8 |  | $1,033.1 |
Amortization | 66.6 |  | 105.0 |  | — |  | — |  | 171.6 |
Amortization (right-of-use assets) | 1.1 |  | — |  | — |  | — |  | 1.1 |
Disposals | (1.2) |  | — |  | — |  | — |  | (1.2) |
At December 31, 2019 | $569.4 |  | $626.4 |  | $— |  | $8.8 |  | $1,204.6 |
Amortization | 75.5 |  | 88.8 |  | — |  | — |  | 164.3 |
Amortization (right-of-use assets) | 1.0 |  | — |  | — |  | — |  | 1.0 |
Disposals | (4.6) |  | — |  | — |  | — |  | (4.6) |
At December 31, 2020 | $641.3 |  | $715.2 |  | $— |  | $8.8 |  | $1,365.3 |
Net carrying value |  |  |  |  |
At December 31, 2019 | $750.9 |  | $1,824.4 |  | $104.9 |  | $253.2 |  | $2,933.4 |
At December 31, 2020 | $888.7 |  | $1,909.0 |  | $16.9 |  | $286.7 |  | $3,101.3 |
Note: Certain comparative balances have been restated to conform presentation adopted during the year. The net carrying values by segment (note 14) are as follows:
|  | Mineral property |  |
| Plant and equipment | Depletable | Non-depletable | Exploration and evaluation | Total
Young-Davidson | $684.7 |  | $822.8 |  | — |  | — |  | $1,507.5 |
Island Gold | 88.4 |  | 818.7 |  | 4.9 |  | — |  | 912.0 |
Mulatos | 107.8 |  | 126.7 |  | 12.0 |  | — |  | 246.5 |
Kirazlı | 0.3 |  | 140.8 |  | — |  | — |  | 141.1 |
Corporate and other | 7.5 |  | — |  | — |  | 286.7 |  | 294.2 |
At December 31, 2020 | $888.7 |  | $1,909.0 |  | $16.9 |  | $286.7 |  | $3,101.3 |
Young-Davidson | $555.3 |  | $807.0 |  | $104.9 |  | — |  | $1,467.2 |
Island Gold | 77.3 |  | 747.0 |  | — |  | — |  | 824.3 |
Mulatos | 109.7 |  | 136.1 |  | — |  | — |  | 245.8 |
Kirazlı | 0.3 |  | 134.3 |  | — |  | — |  | 134.6 |
Corporate and other | 8.3 |  | — |  | — |  | 253.2 |  | 261.5 |
At December 31, 2019 | $750.9 |  | $1,824.4 |  | $104.9 |  | $253.2 |  | $2,933.4 |

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