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Inventory (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of inventories [Abstract]  
Schedule of Inventory

December 31, 2018
December 31, 2017
In-process precious metals
$53.6

$131.6

Ore in stockpiles
35.4

44.1

Parts and supplies
45.7

41.5

Dore, refined precious metals and gold in concentrate
5.5

12.7

 
140.2

229.9

Less: Long-term inventory
(30.0
)
(68.7
)
 
$110.2

$161.2