INVENTORIES: (Tables)

9 Months Ended

Sep. 30, 2014

INVENTORIES:

Schedule of inventories

(in millions)	At September 30,2014		At December 31,2013
Inventory, current:
Metals at lower of average cost or market:
Finished goods	$	93.9	$	84.2
Work-in-process	349.3		305.4
Supplies at average cost	306.8		304.3
Total current inventory	$	750.0	$	693.9
Inventory, long-term
Leach stockpiles	$	539.6	$	395.2