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INVENTORIES: (Tables)
 6 Months Ended
Jun. 30, 2017
INVENTORIES:  
Schedule of inventories

 

(in millions)

 

At June 30,
2017

 

At December 31,
2016

 

Inventory, current:

 

 

 

 

 

Metals at average cost:

 

 

 

 

 

Finished goods

 

$
149.7

 

$
130.5

 

Work-in-process

 
159.0

 
231.6

 

Ore stockpiles on leach pads

 
313.3

 
310.9

 

Supplies at average cost:

 
353.4

 
337.4

 

 

 

 

 

 

 

Total current inventory

 

$
975.4

 

$
1,010.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inventory, non-current:

 

 

 

 

 

Ore stockpiles on leach pads

 

$
890.3

 

$
806.9