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

3 Months Ended

Mar. 31, 2022

Inventory Disclosure [Abstract]

Schedule of Inventory

The components of inventories follow (in millions):

	March 31, 2022		December 31, 2021
Current inventories:
Total materials and supplies, neta	$	1,741	$	1,669
Mill stockpiles	$	175	$	193
Leach stockpiles	1,052		977
Total current mill and leach stockpiles	$	1,227	$	1,170
Raw materials (primarily concentrate)	$	280	$	536
Work-in-process	275		195
Finished goods	931		927
Total product	$	1,486	$	1,658
Long-term inventories:
Mill stockpiles	$	227	$	226
Leach stockpiles	1,150		1,161
Total long-term mill and leach stockpilesb	$	1,377	$	1,387

a.Materials and supplies inventory was net of obsolescence reserves totaling $39 million at March 31, 2022, and $36 million at December 31, 2021.

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