XML 124 R84.htm IDEA: XBRL DOCUMENT v3.20.4

CONTINGENCIES (Environmental and Reclamation Programs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
New Mexico Environmental And Reclamation Programs
Site Contingency [Line Items]
Accrued reclamation and closure costs	$ 477
Arizona Environmental And Reclamation Programs
Site Contingency [Line Items]
Accrued reclamation and closure costs	362
Colorado Environmental And Reclamation Programs
Site Contingency [Line Items]
Accrued reclamation and closure costs	138
El Abra
Site Contingency [Line Items]
Accrued reclamation and closure costs	81
Cerro Verde
Site Contingency [Line Items]
Accrued reclamation and closure costs	138
Pt Freeport Indonesia Environmental And Reclamation Programs [Member]
Site Contingency [Line Items]
Accrued reclamation and closure costs	827
Mine Closure
Site Contingency [Line Items]
Funding restricted time deposit during period for closure and reclamation guarantees	94
Mine Reclamation
Site Contingency [Line Items]
Funding restricted time deposit during period for closure and reclamation guarantees	2
MOEF Framework
Site Contingency [Line Items]
Permit Fees	13	$ 32
Permit Fee Credit	$ 19

X

- Definition

Permit Fee Credit

+ References

No definition available.

+ Details

Name:	fcx_PermitFeeCredit
Namespace Prefix:	fcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Permit Fees

+ References

No definition available.

+ Details

Name:	fcx_PermitFees
Namespace Prefix:	fcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net cash inflow (outflow) of time deposits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 230
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6477933&loc=d3e60009-112784

+ Details

Name:	us-gaap_IncreaseDecreaseInTimeDeposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.Y.Q2)
-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

+ Details

Name:	us-gaap_MineReclamationAndClosingLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SiteContingencyLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_NewMexicoEnvironmentalAndReclamationProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_ArizonaEnvironmentalAndReclamationProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_ColoradoEnvironmentalAndReclamationProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_ElAbraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_CerroVerdeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationSiteAxis=fcx_PtFreeportIndonesiaEnvironmentalAndReclamationProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationContingencyAxis=fcx_MineClosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationContingencyAxis=fcx_MineReclamationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EnvironmentalRemediationContingencyAxis=fcx_MOEFFrameworkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: