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Investments (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) item
Investments |  |
Equity Investments | $ 172.2 | $ 118.4
Warrants | 0.8 | 0.9
Loan Receivable | 30.1 | 28.1
Total Investments | $ 203.1 | $ 147.4
Number of equity investments accounted for at cost | item | 1 | 1
Carrying value | $ 4.1 | $ 3.8
Unrealized gains losses on available-for-sale investments |  |
Mark-to-market gain on equity investments | 44.5 | 58.2
Deferred tax (expense) recovery in other comprehensive income | (6.1) | (5.3)
Unrealized gain on available-for-sale securities, net of tax | 38.4 | 52.9
Reclassification for realized change in market value recognized in net income, net of tax | 2.4 | (10.6)
Change in market value of available-for-sale investments | $ 40.8 | $ 42.3

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