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SEGMENTED INFORMATION (Details 2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue |  | $ 604.5 | $ 388.7 |
Non-current assets |  | 1,868.3 | 3,364.4 | [1]
Canada [Member] |  |  |  |
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue |  | 588.5 | 336.3 | [2]
Non-current assets |  | 1,868.3 | 2,971.0 | [1]
United States [Member] |  |  |  |
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue | [3] | 0.0 | 0.0 | [2]
Non-current assets | [3] | 0.0 | 302.4 | [1]
Australia [Member] |  |  |  |
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue | [3] | 0.0 | 0.0 | [2]
Non-current assets | [3] | 0.0 | 85.3 | [1]
Mexico [Member] |  |  |  |
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue |  | 16.0 | 52.4 | [2]
Non-current assets |  | 0.0 | 5.1 | [1]
Other [Member] |  |  |  |
REVENUE AND NON-CURRENT ASSETS BY LOCATION |  |  |  |
Revenue |  | 0.0 | 0.0 | [2]
Non-current assets |  | $ 0.0 | $ 0.6 | [1]
[1] | Non-current assets exclude financial instruments (investments, reclamation deposits and other) and deferred tax assets.
[2] | Presented based on the location in which the sale originated.
[3] | For the years ended December 31, 2018 and 2017, revenue from Peak Mines and Mesquite is included in earnings from discontinued operations.

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