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INVENTORIES: (Tables)

9 Months Ended

Sep. 30, 2018

INVENTORIES:

Schedule of inventories

(in millions)		At September 30, 2018			At December 31, 2017
Inventory, current:
Metals at average cost:
Finished goods		$	50.7		$	48.8
Work-in-process		269.8			308.0
Ore stockpiles on leach pads		308.9			320.9
Supplies at average cost:		378.2			364.2
Total current inventory		$	1,007.6		$	1,041.9
Inventory, non-current:
Ore stockpiles on leach pads		$	1,143.0		$	977.4

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