Inventories, Including Long-Term Mill and Leach Stockpiles - Schedule of Inventory (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current inventories:
Raw materials (primarily copper concentrate)	$ 413	$ 469
Work-in-process	252	221
Finished goods	1,691	1,782
Product	2,356	2,472
Materials and supplies, net	2,202	2,169
Mill stockpiles	181	179
Leach stockpiles	1,238	1,240
Total current mill and leach stockpiles	1,419	1,419
Long-term inventories:
Mill stockpiles	222	251
Leach stockpiles	1,091	1,085
Total long-term mill and leach stockpiles	1,313	1,336
Inventory obsolescence reserves	$ 48	$ 41