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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Stock Award Plans) (Details) |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  | 12 Months Ended |
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Dec. 31, 2013 2006 stock incentive plan [Member] | Dec. 31, 2013 Executive Officers Performance Based [Member] | Dec. 31, 2013 Outside Directors [Member] | Dec. 31, 2013 Minimum [Member] Executive Officers Performance Based [Member] | Dec. 31, 2013 Maximum [Member] | Jun. 03, 2013 McMoRan Exploration Co [Member] | May 31, 2013 Restricted Stock Units (RSUs) [Member] Plains Exploration & Production Company [Member] | Jun. 03, 2013 Restricted Stock Units (RSUs) [Member] McMoRan Exploration Co [Member] | May 31, 2013 Cash Settled Restricted Stock Units [Member] Plains Exploration & Production Company [Member] | Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member] Plains Exploration & Production Company [Member] | May 31, 2013 Stock Appreciation Rights (SARs) [Member] Plains Exploration & Production Company [Member] | Dec. 31, 2013 Employee Stock Option [Member] | Dec. 31, 2013 Employee Stock Option [Member] McMoRan Exploration Co [Member] | Jun. 03, 2013 Employee Stock Option [Member] McMoRan Exploration Co [Member]
Award Detail [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares available for issuance under each of the stock award plans | 74,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant | 24,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration Period Of Options |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |
Annual vesting percentage of Options |  |  |  |  |  |  |  |  |  | 33.00% |  | 25.00% |  |
Vesting period for restricted stock units |  |  | 4 years |  | 3 years |  |  |  |  |  |  |  |  |
Minimum Five Year Return Required For Restricted Stock Units To Vest Over Three Years |  |  |  | 6.00% |  |  |  |  |  |  |  |  |  |
Percent Reduction In Restrcited Stock Units If Performance Is Below Level Defined In Agreement |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units Converted |  |  |  |  |  |  | 1,238,685 | 13,500 | 2,259,708 |  |  |  |  |
Stock Appreciation Rights Converted |  |  |  |  |  |  |  |  |  |  | 2,374,601 |  |  |
Expiration Term Of Stock Appreciation Rights |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Stock Appreciation Rights Converted And Vested |  |  |  |  |  |  |  |  |  |  | 1,490,998 |  |  |
Stock Appreciation Rights Converted Unvested |  |  |  |  |  |  |  |  |  |  | 883,603 |  |  |
Vesting Period Of Stock Appreciation Rights |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Stock Options Converted |  |  |  |  |  | 7,203,392 |  |  |  |  |  |  |  | 7,203,392
Stock Options Converted - Vested |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,336,422
Stock Options Converted - Unvested |  |  |  |  |  |  |  |  |  |  |  |  |  | 866,970

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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