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Inventories, Including Long-Term Mill and Leach Stockpiles
 3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventories, Including Long-Term Mill and Leach Stockpiles INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES
The components of inventories follow:
March 31,
2024		December 31, 2023
Current inventories:
Raw materials (primarily copper concentrate)$413 $469 
Work-in-process252 221 
Finished goods1,691 1,782 
Total product$2,356 $2,472 
Total materials and supplies, neta
$2,202 $2,169 
Mill stockpiles$181 $179 
Leach stockpiles1,238 1,240 
Total current mill and leach stockpiles$1,419 $1,419 
Long-term inventories:
Mill stockpiles$222 $251 
Leach stockpiles1,091 1,085 
Total long-term mill and leach stockpilesb
$1,313 $1,336 
a.Materials and supplies inventory was net of obsolescence reserves totaling $48 million at March 31, 2024, and $41 million at December 31, 2023.
b.Estimated metals in stockpiles not expected to be recovered within the next 12 months.