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INVENTORIES : (Tables)
6 Months Ended
Jun. 30, 2015
INVENTORIES:  
Schedule of inventories

 

(in millions)

 

At June 30,
2015

 

At December 31,
2014

 

Inventory, current:

 

 

 

 

 

Metals at average cost:

 

 

 

 

 

Finished goods

 

$

101.7 

 

$

84.6 

 

Work-in-process

 

427.2 

 

450.5 

 

Supplies at average cost

 

297.6 

 

301.4 

 

 

 

 

 

 

 

Total current inventory

 

$

826.5 

 

$

836.5 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inventory, long-term

 

 

 

 

 

Leach stockpiles

 

$

630.7 

 

$

512.7