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Inventories, Including Long-Term Mill and Leach Stockpiles - Schedule of Inventory (Details) t in Thousands, $ in Millions | Sep. 30, 2023 USD ($) t | Dec. 31, 2022 USD ($)
--- | --- | ---
Current inventories: |  |
Raw materials (primarily copper concentrate) | $ 467 | $ 443
Work-in-process | 219 | 221
Finished goods | 1,729 | 1,169
Product | 2,415 | 1,833
Materials and supplies, net | 2,131 | 1,964
Mill stockpiles | 165 | 216
Leach stockpiles | 1,238 | 1,167
Total current mill and leach stockpiles | 1,403 | 1,383
Long-term inventories: |  |
Mill stockpiles | 260 | 199
Leach stockpiles | 1,067 | 1,053
Total long-term mill and leach stockpiles | $ 1,327 | 1,252
Gold deferred in inventory for future sale | t | 75 |
Inventory obsolescence reserves | $ 31 | $ 39
PT Freeport Indonesia |  |
Long-term inventories: |  |
Ownership interest in copper smelter and refinery | 39.50% |

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