Date when Former Legal or Registered Name was changed

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- Definition

The amount of natural gas sales priced using industry pricing index, expressed as a percentage.

+ References

No definition available.

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- Definition

Date when results of operations of the acquired entity are included in the income statement of the combined entity, in 'YYYY-MM-DD' format.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee that is carried at cost.

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No definition available.

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- Definition

Minimum percentage of company's direct or indirect ownership in subsidiary for it to be included in consolidated financial statements.

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No definition available.

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- Definition

The percentage of recoverable copper material in active copper leach stockpiles. Ultimate recoveries can vary (exceeding the stated percentage) based on the type of copper recovery, mineralogy and particle size of the rock.

+ References

No definition available.

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- Definition

The percentage of copper recoverable during the first year from newly placed material on active copper leach stockpiles.

+ References

No definition available.

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- Definition

Threshhold for determining if an oil and gas disposition is accounted for as a reduction to capitalized costs or as a sale, with corresponding gain loss recognized.

+ References

No definition available.

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Name Accounting Standards Codification

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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- Definition

The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

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-Publisher FASB

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- Definition

Amount of interest capitalized during the period.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Allowance for Funds Used during Construction

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		7 Months Ended	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Schedule of Significant Accounting Policies [Line Items]
Entity Information, Date to Change Former Legal or Registered Name				Jul. 14, 2014
Minimum ownership percentage of subsidiary for inclusion in consolidated financial statements	50.00%			50.00%
Percentage of ultimate copper recovery from leach stockpiles				90.00%
Threshhold for Determining Accounting Treatment for Oil and Gas Dispositions				25.00%
Fair Value Inputs, Discount Rate				10.00%us-gaap_FairValueInputsDiscountRate
Impairment of oil and gas properties	$ 3,400us-gaap_ImpairmentOfOilAndGasProperties	$ 308us-gaap_ImpairmentOfOilAndGasProperties	$ 0us-gaap_ImpairmentOfOilAndGasProperties	$ 3,737us-gaap_ImpairmentOfOilAndGasProperties	$ 0us-gaap_ImpairmentOfOilAndGasProperties	$ 0us-gaap_ImpairmentOfOilAndGasProperties
Amount of Natural Gas Sales Priced Using Industry Pricing Index, Percentage				40.00%
Minimum [Member]
Schedule of Significant Accounting Policies [Line Items]
Ownership percentage for investment in unconsolidated companies accounted for using the equity method	20.00%			20.00%
Maximum [Member]
Schedule of Significant Accounting Policies [Line Items]
Ownership percentage for investments in unconsolidated companies carried at cost	20.00%			20.00%
Percentage of copper ultimately recoverable from newly placed material on active stockpiles extracted during the first year				80.00%
PT Freeport Indonesia [Member]
Schedule of Significant Accounting Policies [Line Items]
Ownership percentage of subsidiary	90.64%			90.64%
Plains Exploration & Production Company [Member]
Schedule of Significant Accounting Policies [Line Items]
Business Acquisition, Effective Date of Acquisition					May 31, 2013		May 31, 2013
Business Acquisition, Date Results Included in Combined Entity					Jun. 01, 2013
McMoRan Exploration Co [Member]
Schedule of Significant Accounting Policies [Line Items]
Business Acquisition, Effective Date of Acquisition					Jun. 03, 2013
Business Acquisition, Date Results Included in Combined Entity					Jun. 04, 2013
Oil and Gas Operations Segment [Member]
Schedule of Significant Accounting Policies [Line Items]
Interest Costs Capitalized				88	69
Impairment of oil and gas properties				$ 3,737