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Significant Accounting Policies (Unaudited) (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 03, 2013 | Jun. 30, 2013 McMoRan Exploration Co [Member] | Jun. 03, 2013 McMoRan Exploration Co [Member] | Jun. 30, 2013 Plains Exploration & Production Company [Member] | May 31, 2013 Plains Exploration & Production Company [Member]
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Date Results Included in Combined Entity |  |  | Jun. 04, 2013 |  | Jun. 01, 2013 |
Threshhold for Determining Accounting Treatment for Oil and Gas Dispositions | 25.00% |  |  |  |  |
Subject to depletion | $ 12,200 | $ 12,248 |  | $ 801 |  | $ 11,447
Not subject to depletion | $ 11,400 | $ 11,327 |  | $ 1,692 |  | $ 9,635
Fair Value Inputs, Discount Rate | 10.00% |  |  |  |  |

X
- 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. + Details
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- Definition The amount of oil and gas properties not subject to depletion recognized as of the acquisition date. + References No definition available. + Details
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- Definition The amount of oil and gas properties subject to depletion recognized as of the acquisition date. + References No definition available. + Details
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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. + Details
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- Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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