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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 |  |  |  |  |  |  |  |  |

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