Contingencies and Commitments - Other Matters (Details) t in Millions, $ in Millions	1 Months Ended			3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	May 31, 2023	Mar. 31, 2023	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2023	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2024	Aug. 01, 2023	Jul. 24, 2023 t	Jul. 15, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Export duties, construction progress, threshold				50.00%			50.00%
Export license granted for concentrate | t											1.7
Construction progress Manyar smelter, percentage		50.00%
Export proceeds to be held in Indonesian banks, percent										30.00%
Export proceeds to be held in Indonesian banks, term										90 days
Other assets				$ 1,709			$ 1,709						$ 1,601
Escrow account, smelter development progress, percent	90.00%
Estimated future deposit				370			370
Bank Time Deposits | Carrying Amount, Fair Value Disclosure
Loss Contingencies [Line Items]
Other assets				135			$ 135						$ 133
Forecast | Smelter Progress from 70% to 90%
Loss Contingencies [Line Items]
Export duty to be paid, percent						7.50%			10.00%
Forecast | Smelter Progress Above 90%
Loss Contingencies [Line Items]
Export duty to be paid, percent						5.00%			7.50%
Minimum
Loss Contingencies [Line Items]
Export duties, smelter construction progress, percent							70.00%
Maximum
Loss Contingencies [Line Items]
Export duties, smelter construction progress, percent							90.00%
PT Freeport Indonesia
Loss Contingencies [Line Items]
Export duties assessed				147
Payment for administrative fees			$ 57
Administrative fine					$ 41		$ 55	$ 41
Loss contingency, estimate of possible loss												$ 55
PT Freeport Indonesia | Indonesia Government
Loss Contingencies [Line Items]
Deposits in joint account				$ 10