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Investments (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Investments |
|  | UNITED STATES DOLLAR |
|  | 2017 |  |  | 2016 |
Listed |  |  |  |  |  |  |  |
Cost |  |  | 143.0 |  |  |  | 62.9 |
Less: Accumulated impairments |  |  | (45.5 | ) |  |  | (45.0 | )
Net unrealised loss on revaluation |  |  | (8.1 | ) |  |  | (7.4 | )
Translation adjustment |  |  | 9.6 |  |  |  | — |
Carrying value |  |  | 99.0 |  |  |  | 10.5 |
Market value |  |  | 99.0 |  |  |  | 10.5 |
Unlisted |  |  |  |  |  |  |  |
Carrying value at cost |  |  | 0.1 |  |  |  | 3.3 |
Derivative instruments |  |  |  |  |  |  |  |
Warrants2 |  |  | 5.5 |  |  |  | 5.9 |
Total investments1 |  |  | 104.6 |  |  |  | 19.7 |
1 | All listed investments are classified as available for sale. Refer note 42 for details of major investments.
2 | Consists of 10.0 million common share purchase warrants of Maverix. Refer note 15.1 for further details.

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