Approximate number of states having active remediation projects.

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- Definition

Amount of assessment by government agencies in connection with alleged obligations.

+ References

No definition available.

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- Definition

Amount of assessment by government agencies in connection with alleged obligations, expressed in foreign currency.

+ References

No definition available.

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- Definition

Amount of assessment by government agencies in connection with alleged obligations, net of noncontrolling interest.

+ References

No definition available.

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- Definition

Disputed tax assessments (including interest and penalties) receivable.

+ References

No definition available.

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- Definition

The minimum number of active remediation projects in United States.

+ References

No definition available.

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- Definition

The estimated interest penalties the entity will owe the government agency in the event the outcome of the formal assessment is not in the entity's favor.

+ References

No definition available.

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- Definition

Total tax payments made in excess of corresponding tax obligation as of the period end date.

+ References

No definition available.

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- Definition

Total tax payments made in excess of corresponding tax obligation as agreed to by tax authority as of the period end date.

+ References

No definition available.

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- Definition

The amount of cash received during the period as refunds for the overpayment of taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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CONTINGENCIES (Details) In Millions, unless otherwise specified	12 Months Ended					1 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Cerro Verde [Member] Minimum [Member]	Dec. 31, 2013 Cerro Verde [Member] Maximum [Member]	Jul. 31, 2013 PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 PT Freeport Indonesia [Member] USD ($)	Oct. 31, 2010 Relating To 2005 [Member] PT Freeport Indonesia [Member] USD ($)	Nov. 30, 2011 Relating To 2006 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2012 Relating To 2007 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2013 Relating To 2008 [Member] PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 Relating To 2011 [Member] PT Freeport Indonesia [Member] USD ($)	Jun. 30, 2013 Relating To 2011 [Member] PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 Relating To 2005 and 2007 [Member] PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 Relating to the Period October 2006 through December 2008 [Member] Cerro Verde [Member] USD ($)	Dec. 31, 2013 Relating to the Period October 2006 through December 2008 [Member] Cerro Verde [Member] PEN	Dec. 31, 2013 Relating to 2009 [Member] Cerro Verde [Member] USD ($)	Dec. 31, 2013 Relating to 2009 [Member] Cerro Verde [Member] PEN	Dec. 31, 2013 Tax Assessment [Member] PT Freeport Indonesia [Member] USD ($)	Oct. 31, 2010 Tax Assessment [Member] Relating To 2005 [Member] PT Freeport Indonesia [Member] USD ($)	Nov. 30, 2011 Tax Assessment [Member] Relating To 2006 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2012 Tax Assessment [Member] Relating To 2007 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2013 Tax Assessment [Member] Relating To 2008 [Member] PT Freeport Indonesia [Member] USD ($)	Jun. 30, 2013 Tax Assessment [Member] Relating To 2011 [Member] PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 Interest Assessment [Member] PT Freeport Indonesia [Member] USD ($)	Oct. 31, 2010 Interest Assessment [Member] Relating To 2005 [Member] PT Freeport Indonesia [Member] USD ($)	Nov. 30, 2011 Interest Assessment [Member] Relating To 2006 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2012 Interest Assessment [Member] Relating To 2007 [Member] PT Freeport Indonesia [Member] USD ($)	Mar. 31, 2013 Interest Assessment [Member] Relating To 2008 [Member] PT Freeport Indonesia [Member] USD ($)	Jun. 30, 2013 Interest Assessment [Member] Relating To 2011 [Member] PT Freeport Indonesia [Member] USD ($)	Dec. 31, 2013 Interest Assessment [Member] Relating to the Period October 2006 through December 2008 [Member] Cerro Verde [Member] USD ($)	Dec. 31, 2013 Other Assets [Member] PT Freeport Indonesia [Member] USD ($)
Site Contingency [Line Items]
Reasonably Possible Interest Penalties				7.00%	18.00%
Minimum number of active remediation projects in the United States (in number of projects)	100
Approximate number of states with active remediation projects (in number of states)	28
Assessment By Foreign Government of Alleged Obligations, Expressed in Foreign Currency																492		206
Assessment By Foreign Government Of Alleged Obligations							502	152	32	135	114		69		176		74		334	103	22	91	62	56	168	49	10	44	52	13	104
Assessment By Foreign Government Of Alleged Obligations, Net of Noncontrolling Interest															94		39
Tax Overpayment, Amount Agreed to by Tax Authority							291
Tax Overpayment							320
Proceeds from Income Tax Refunds	270	69	15			165
Disputed Tax Assessments Receivable												$ 22		$ 126																		$ 255