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INVENTORIES:

12 Months Ended

Dec. 31, 2017

INVENTORIES:

INVENTORIES:

NOTE 4—INVENTORIES:

		At December 31,
(in millions)		2017			2016
Inventory, current:
Metals at average cost:
Finished goods		$	48.8		$	130.5
Work-in-process			308.0			231.6
Ore stockpiles on leach pads			320.9			310.9
Supplies at average cost			364.2			337.4
​	​	​	​	​	​	​	​
Total current inventory		$	1,041.9		$	1,010.4
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​
Inventory, long-term:
Ore stockpiles on leach pads		$	977.4		$	806.9
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

        Total leaching costs added as long-term inventory of ore stockpiles in leach pads amounted to $513.9 million, $439.0 million and $506.9 million in 2017, 2016 and 2015, respectively. Long-term leaching inventories recognized as cost of sales amounted to $333.5 million, $316.6 million and $274.1 million in 2017, 2016 and 2015, respectively.

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- References

No definition available.

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- Definition

The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766

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