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%