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Royalty, stream and working interests - Impairments (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2013 | Mar. 31, 2020 | Dec. 31, 2019
Royalty, stream and working interests |  |  |  |  |  |  |
Carrying value |  |  | $ 5,149.3 | $ 4,632.1 |  |  | $ 4,797.8
Impairment reversal amount |  |  | 75.5 |  |  |  |
Recoverable amount |  |  | 218.0 |  |  | $ 476.7 |
Sudbury (McCreedy West) |  |  |  |  |  |  |
Royalty, stream and working interests |  |  |  |  |  |  |
Impairments |  |  |  |  | $ 107.9 |  |
Impairment reversal amount |  | $ 0.0 |  |  |  |  |
Recoverable amount |  | 32.7 |  |  |  |  |
Impairment loss |  | $ 0.0 |  |  |  |  |
Agi Dagi |  |  |  |  |  |  |
Royalty, stream and working interests |  |  |  |  |  |  |
Impairment reversal amount | $ 7.5 |  |  |  |  |  |
Streams |  |  |  |  |  |  |
Royalty, stream and working interests |  |  |  |  |  |  |
Carrying value |  |  | $ 2,623.0 | 2,653.6 |  |  | $ 2,804.0
Streams | Mine Waste Solutions |  |  |  |  |  |  |
Royalty, stream and working interests |  |  |  |  |  |  |
Reversal of impairment loss recognized |  |  |  | 9.6 |  |  |
Carrying value |  |  |  | 77.2 |  |  |
Recoverable amount |  |  |  | $ 114.8 |  |  |

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