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Contingencies and Commitments - Indonesia Regulatory Matters (Details) | Jul. 02, 2024 | May 30, 2024
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Commitments and Contingencies Disclosure [Abstract] |  |
Export duty to be paid, percent | 7.50% |
Domestic ownership percentage |  | 51.00%
Additional ownership percentage |  | 10.00%

X
- Definition Additional Ownership Percentage + References No definition available. + Details
Name: | fcx_AdditionalOwnershipPercentage
Namespace Prefix: | fcx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Domestic Ownership Percentage + References No definition available. + Details
Name: | fcx_DomesticOwnershipPercentage
Namespace Prefix: | fcx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Export Duty to be Paid, Percent + References No definition available. + Details
Name: | fcx_ExportDutyToBePaidPercent
Namespace Prefix: | fcx_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration