INVENTORIES: (Tables)

12 Months Ended

Dec. 31, 2022

INVENTORIES:

Schedule of inventories

	At December 31,
(in millions)	2022		2021
Inventory, current:
Metals at average cost:
Finished goods	$	78.5	$	58.6
Work-in-process		330.5		340.7
Ore stockpiles on leach pads		259.7		259.7
Supplies at average cost		345.2		313.9
Total current inventory	$	1,013.9	$	972.9
Inventory, long-term:
Ore stockpiles on leach pads	$	1,064.3	$	1,097.6