INVENTORIES: (Tables)

6 Months Ended

Jun. 30, 2020

INVENTORIES:

Schedule of inventories

	At June 30,		At December 31,
(in millions)	2020		2019
Inventory, current:
Metals at average cost:
Finished goods	$	65.6	$	87.2
Work-in-process		237.4		259.7
Ore stockpiles on leach pads		312.5		358.4
Supplies at average cost		364.9		363.2
Total current inventory	$	980.4	$	1,068.5
Inventory, long-term:
Ore stockpiles on leach pads	$	1,162.0	$	1,230.3