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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Stock Award Plans) (Details)
 12 Months Ended 12 Months Ended 12 Months Ended
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