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v3.22.1

Mining interests (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Mining Interests |  |
Beginning balance | $ 1,828.3 |
Ending balance | 1,787.9 | $ 1,828.3
COST |  |
Mining Interests |  |
Beginning balance | 3,325.9 | 3,249.7
Additions | 319.3 | 299.9
Disposals | 7.9 | 9.1
Transfers | 0.0 | 0.0
Sale of Blackwater (Note 10) | 150.0 | 214.6
Ending balance | 3,487.3 | 3,325.9
ACCUMULATED DEPRECIATION |  |
Mining Interests |  |
Beginning balance | (1,497.6) | (1,321.7)
Disposals | (5.5) | (7.2)
Sale of Blackwater (Note 10) |  | (6.6)
Depreciation for the period | 207.3 | 189.7
Ending balance | (1,699.4) | (1,497.6)
Depletable |  |
Mining Interests |  |
Beginning balance | 660.3 |
Ending balance | 740.2 | 660.3
Depletable | COST |  |
Mining Interests |  |
Beginning balance | 1,569.4 | 1,451.1
Additions | 113.2 | 57.7
Disposals | 0.3 | 0.0
Transfers | 63.6 | 60.6
Sale of Blackwater (Note 10) | 0.0 | 0.0
Ending balance | 1,745.9 | 1,569.4
Depletable | ACCUMULATED DEPRECIATION |  |
Mining Interests |  |
Beginning balance | (909.1) | (831.4)
Disposals | (0.1) | 0.0
Sale of Blackwater (Note 10) |  | 0.0
Depreciation for the period | 96.7 | 77.7
Ending balance | (1,005.7) | (909.1)
Non- depletable |  |
Mining Interests |  |
Beginning balance | 300.4 |
Ending balance | 261.0 | 300.4
Non- depletable | COST |  |
Mining Interests |  |
Beginning balance | 300.4 | 409.0
Additions | 110.6 | 85.7
Disposals | 0.0 | 0.0
Transfers | 0.0 | 0.0
Sale of Blackwater (Note 10) | 150.0 | 194.3
Ending balance | 261.0 | 300.4
Non- depletable | ACCUMULATED DEPRECIATION |  |
Mining Interests |  |
Beginning balance | 0.0 | 0.0
Disposals | 0.0 | 0.0
Sale of Blackwater (Note 10) |  | 0.0
Depreciation for the period | 0.0 | 0.0
Ending balance | 0.0 | 0.0
Plant & equipment |  |
Mining Interests |  |
Beginning balance | 710.6 |
Ending balance | 668.6 | 710.6
Plant & equipment | COST |  |
Mining Interests |  |
Beginning balance | 1,299.1 | 1,260.2
Additions | 36.5 | 68.3
Disposals | 7.6 | 9.1
Transfers | 34.3 | 0.0
Sale of Blackwater (Note 10) | 0.0 | 20.3
Ending balance | 1,362.3 | 1,299.1
Plant & equipment | ACCUMULATED DEPRECIATION |  |
Mining Interests |  |
Beginning balance | (588.5) | (490.3)
Disposals | (5.4) | (7.2)
Sale of Blackwater (Note 10) |  | (6.6)
Depreciation for the period | 110.6 | 112.0
Ending balance | (693.7) | (588.5)
Construction in progress |  |
Mining Interests |  |
Beginning balance | 157.0 |
Ending balance | 118.1 | 157.0
Construction in progress | COST |  |
Mining Interests |  |
Beginning balance | 157.0 | 129.4
Additions | 59.0 | 88.2
Disposals | 0.0 | 0.0
Transfers | (97.9) | (60.6)
Sale of Blackwater (Note 10) | 0.0 | 0.0
Ending balance | 118.1 | 157.0
Construction in progress | ACCUMULATED DEPRECIATION |  |
Mining Interests |  |
Beginning balance | 0.0 | 0.0
Disposals | 0.0 | 0.0
Sale of Blackwater (Note 10) |  | 0.0
Depreciation for the period | 0.0 | 0.0
Ending balance | $ 0.0 | $ 0.0

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