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Inventories, Including Long-Term Mill and Leach Stockpiles (Unaudited) (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory

The components of inventories follow (in millions):

			March 31, 2021						December 31, 2020
Current inventories:
Total materials and supplies, neta			$	1,596					$	1,594
Mill stockpiles			$	177					$	205
Leach stockpiles			830						809
Total current mill and leach stockpiles			$	1,007					$	1,014
Raw materials (primarily concentrate)			$	419					$	366
Work-in-process			165						174
Finished goods			958						745
Total product			$	1,542					$	1,285
Long-term inventories:
Mill stockpiles			$	245					$	223
Leach stockpiles			1,230						1,240
Total long-term mill and leach stockpilesb			$	1,475					$	1,463

a.Materials and supplies inventory was net of obsolescence reserves totaling $35 million at March 31, 2021, and $32 million at December 31, 2020.

b.Estimated metals in stockpiles not expected to be recovered within the next 12 months.

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- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for sale or to be used in manufacturing, servicing or production process.

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