XML 25 R27.htm IDEA: XBRL DOCUMENT v3.19.3
INVENTORIES: (Tables)
9 Months Ended
Sep. 30, 2019
INVENTORIES:  
Schedule of inventories

At September 30, 

At December 31, 

(in millions)

    

2019

    

2018

Inventory, current:

Metals at average cost:

Finished goods

$

60.0

$

69.6

Work-in-process

 

276.4

 

256.8

Ore stockpiles on leach pads  

356.5

328.0

Supplies at average cost

 

369.3

 

378.3

Total current inventory

$

1,062.2

$

1,032.7

Inventory, long-term:

Ore stockpiles on leach pads

$

1,224.9

$

1,177.4