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DEBT (Details) (USD $)
 7 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 9 Months Ended 1 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jun. 03, 2013
Dec. 31, 2013
Bridge Loan [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
Dec. 31, 2013
Line of Credit [Member]
Dec. 31, 2013
Bank Term Loan [Member]
Feb. 14, 2013
Bank Term Loan [Member]
Dec. 31, 2012
Bank Term Loan [Member]
Feb. 28, 2012
Senior Notes [Member]
Mar. 31, 2013
Senior Notes [Member]
Mar. 07, 2013
Senior Notes [Member]
Mar. 31, 2007
Assumed Debt [Member]
Dec. 31, 2013
Other debt (including equipment capital leases and short-term borrowings) [Member]
Dec. 31, 2012
Other debt (including equipment capital leases and short-term borrowings) [Member]
Dec. 31, 2012
Line of Credit [Member]
Dec. 31, 2013
Revolving Credit Facility [Member]
Credit Facility [Domain]
Dec. 31, 2012
Revolving Credit Facility [Member]
Credit Facility [Domain]
Dec. 31, 2021
3.55% Senior Notes Due 2022 [Member]
Senior Notes [Member]
Dec. 31, 2013
3.55% Senior Notes Due 2022 [Member]
Senior Notes [Member]
Dec. 31, 2012
3.55% Senior Notes Due 2022 [Member]
Senior Notes [Member]
Feb. 28, 2012
3.55% Senior Notes Due 2022 [Member]
Senior Notes [Member]
Dec. 31, 2022
3.875% Senior Notes due March 2023 [Member]
Senior Notes [Member]
Dec. 31, 2013
3.875% Senior Notes due March 2023 [Member]
Senior Notes [Member]
Dec. 31, 2012
3.875% Senior Notes due March 2023 [Member]
Senior Notes [Member]
Dec. 31, 2042
5.450% Senior Notes due March 2043 [Member]
Senior Notes [Member]
Dec. 31, 2013
5.450% Senior Notes due March 2043 [Member]
Senior Notes [Member]
Dec. 31, 2012
5.450% Senior Notes due March 2043 [Member]
Senior Notes [Member]
Dec. 31, 2013
4% Convertible Senior Notes due 2017 [Member]
Jun. 03, 2013
4% Convertible Senior Notes due 2017 [Member]
Dec. 31, 2013
1.40% Senior Notes Due 2015 [Member]
Senior Notes [Member]
Dec. 31, 2012
1.40% Senior Notes Due 2015 [Member]
Senior Notes [Member]
Feb. 28, 2012
1.40% Senior Notes Due 2015 [Member]
Senior Notes [Member]
Dec. 31, 2013
2.15% Senior Notes Due 2017 [Member]
Senior Notes [Member]
Dec. 31, 2012
2.15% Senior Notes Due 2017 [Member]
Senior Notes [Member]
Feb. 28, 2012
2.15% Senior Notes Due 2017 [Member]
Senior Notes [Member]
Dec. 31, 2013
2.375% Senior Notes due March 2018 [Member]
Senior Notes [Member]
Dec. 31, 2012
2.375% Senior Notes due March 2018 [Member]
Senior Notes [Member]
Dec. 31, 2013
3.100% Senior Notes due March 2020 [Member]
Senior Notes [Member]
Dec. 31, 2012
3.100% Senior Notes due March 2020 [Member]
Senior Notes [Member]
Dec. 31, 2012
8.375% Senior Notes Due 2017 [Member]
Senior Notes [Member]
Dec. 31, 2011
9.5% Senior Notes due 2031 [Member]
Senior Notes [Member]
Dec. 31, 2013
9.5% Senior Notes due 2031 [Member]
Senior Notes [Member]
Dec. 31, 2013
9.5% Senior Notes due 2031 [Member]
Assumed Debt [Member]
Dec. 31, 2013
6.125% Senior Notes due 2034 [Member]
Senior Notes [Member]
Dec. 31, 2013
7.125% Debentures due 2027 [Member]
Debentures [Member]
Dec. 31, 2011
8.25% Senior Notes due 2015 [Member]
Senior Notes [Member]
Dec. 31, 2013
McMoRan Exploration Co [Member]
Jun. 03, 2013
McMoRan Exploration Co [Member]
Sep. 30, 2013
McMoRan Exploration Co [Member]
11.875% Senior Notes due 2014 [Member]
Senior Notes [Member]
Dec. 31, 2013
McMoRan Exploration Co [Member]
11.875% Senior Notes due 2014 [Member]
Senior Notes [Member]
Dec. 31, 2013
McMoRan Exploration Co [Member]
4% Convertible Senior Notes due 2017 [Member]
Senior Notes [Member]
Dec. 31, 2013
McMoRan Exploration Co [Member]
5.25% Convertible Senior Notes due 2013 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
Sep. 30, 2013
Plains Exploration & Production Company [Member]
Credit Facility [Domain]
May 31, 2013
Plains Exploration & Production Company [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
Senior Notes [Member]
Sep. 30, 2013
Plains Exploration & Production Company [Member]
7.625% Senior Notes due 2018 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
7.625% Senior Notes due 2018 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
6.125% Senior Notes due 2019 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
6.125% Senior Notes due 2019 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
8.625% Senior Notes due 2019 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
8.625% Senior Notes due 2019 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
7.625% Senior Notes due 2020 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
7.625% Senior Notes due 2020 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
6.5% Senior Notes due 2020 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
6.5% Senior Notes due 2020 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
6.625% Senior Notes due 2021 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
6.625% Senior Notes due 2021 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
6.75% Senior Notes due 2022 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
6.75% Senior Notes due 2022 [Member]
Senior Notes [Member]
Dec. 31, 2013
Plains Exploration & Production Company [Member]
6.875% Senior Notes due 2023 [Member]
Senior Notes [Member]
Dec. 31, 2012
Plains Exploration & Production Company [Member]
6.875% Senior Notes due 2023 [Member]
Senior Notes [Member]
Dec. 31, 2013
Freeport McMoRan Corporation [Member]
9.5% Senior Notes due 2031 [Member]
Senior Notes [Member]
Dec. 31, 2012
Freeport McMoRan Corporation [Member]
9.5% Senior Notes due 2031 [Member]
Senior Notes [Member]
Dec. 31, 2013
Freeport McMoRan Corporation [Member]
6.125% Senior Notes due 2034 [Member]
Senior Notes [Member]
Dec. 31, 2012
Freeport McMoRan Corporation [Member]
6.125% Senior Notes due 2034 [Member]
Senior Notes [Member]
Dec. 31, 2013
Freeport McMoRan Corporation [Member]
7.125% Debentures due 2027 [Member]
Debentures [Member]
Dec. 31, 2012
Freeport McMoRan Corporation [Member]
7.125% Debentures due 2027 [Member]
Debentures [Member]
Dec. 31, 2013
Option 1 [Member]
Bank Term Loan [Member]
Dec. 31, 2013
Option 1 [Member]
Revolving Credit Facility [Member]
Credit Facility [Domain]
Dec. 31, 2013
Option 2 [Member]
Bank Term Loan [Member]
Dec. 31, 2013
Option 2 [Member]
Revolving Credit Facility [Member]
Credit Facility [Domain]
Debt Instruments [Line Items]                                                                                                                                                                          
Liabilities, Fair Value Adjustment $ 653,000,000                           $ 32,000,000                                                                     $ 62,000,000               $ 716,000,000 $ 653,000,000                                                    
Long-term Debt, Gross 20,706,000,000 20,706,000,000 3,527,000,000         0 4,000,000,000   0         158,000,000 172,000,000 0 0 0   1,996,000,000 1,995,000,000     1,999,000,000 0   1,991,000,000 0     500,000,000 500,000,000   500,000,000 500,000,000   1,500,000,000 0 999,000,000 0                                       817,000,000 0 447,000,000 0 336,000,000 0 1,647,000,000 0 659,000,000 0 1,111,000,000 0 1,686,000,000 0 130,000,000 130,000,000 115,000,000 115,000,000 115,000,000 115,000,000        
Less current portion of long-term debt and short-term borrownings (312,000,000) (312,000,000) (2,000,000)                                                                                                                                                                    
Long-term debt 20,394,000,000 20,394,000,000 3,525,000,000                                                                                                                                                                    
Revolving Credit Facility, Maximum Borrowing Capacity               450,000,000                     3,000,000,000                                                                                                                                    
Revolving Credit Facility, Expiration Date                                     May 31, 2018 Mar. 30, 2016                                                                                                                                  
Business Acquisition, Effective Date of Acquisition                                                                                                               May 31, 2013                                                          
Amount of revolving credit facility available to PT Freeport Indonesia                                     500,000,000                                                                                                                                    
Line of Credit Facility, Amount Outstanding             0 0                                                                                                                                                          
Letters of Credit Outstanding, Amount             46,000,000                                                                                                                                                            
Revolving Credit Facility, Remaining Borrowing Capacity             3,000,000,000                                                                                                                                                            
Remaining borrowing capacity available for letters of credit at period end             1,500,000,000                                                                                                                                                            
Debt Instrument, Description of Variable Rate Basis                                                                                                                                                                   LIBOR London Interbank Offered Rate ABR alternate base rate
Debt Instrument, Basis Spread on Variable Rate                                                                                                                                                                   1.50% 1.50%   0.50%
Debt Instrument, Face Amount                 4,000,000,000 4,000,000,000       6,500,000,000                   2,000,000,000   2,000,000,000     2,000,000,000           500,000,000     500,000,000 1,500,000,000   1,000,000,000         346,000,000         558,000,000             6,400,000,000 6,100,000,000                                                    
Long-term Debt, Maturities, Repayments of Principal in Year Two, Percent                 10.00%                                                                                                                                                        
Long-term Debt, Maturities, Repayments of Principal in Year Three, Percent                 15.00%                                                                                                                                                        
Long-term Debt, Maturities, Repayments of Principal in Year Four, Percent                 20.00%                                                                                                                                                        
Debt Instrument Maturity Date                 May 31, 2018                                                                                                                                                        
Debt Instrument, Interest Rate, Effective Percentage                 1.67%                                                                                                                                                        
Debt Instrument, Interest Rate, Stated Percentage                                               3.55%   3.875%     5.45%           1.40%     2.15% 2.375%   3.10%   8.375%   9.50%   6.125% 7.125% 8.25%       11.875% 4.00% 5.25%           7.625% 6.125%   8.625%   7.625%   6.50%   6.625%   6.75%   6.875%                      
Proceeds from Issuance of Long-term Debt                       2,970,000,000 6,400,000,000                                                                                                                                                
Debt Instrument, Redemption Period, Start Date                                         Dec. 01, 2021       Dec. 15, 2022     Sep. 15, 2042                                                                                                                  
Redemption to Principal Amount, Percent                                         100.00%       100.00%     100.00%                             104.553%           104.125%                   35.00%                                                    
Debt Conversion, Converted Instrument, Expiration or Due Date                                                                                                                           Jun. 15, 2016   Oct. 15, 2014   Apr. 01, 2015   Nov. 15, 2015   May 01, 2016   Feb. 01, 2017   Feb. 15, 2018                      
Convertible Debt, Fair Value Disclosures                                                               306,000,000                                                                                                          
Payments for Repurchase of Preferred Stock and Preference Stock   228,000,000 0 0                                                     270,000,000                                                                                                            
Royalty Trust Units Issued, Conversion of Debt or Equity Instrument   17,700,000                                                         21,000,000                                                                                                            
Royalty Trust Units, Fair Value Disclosure         31,000,000                                                     36,000,000                                                                                                          
Amount of assumed debt                             462,000,000                                                                                                                                            
Loss On Extinguishment Of Debt, Gross   35,000,000 168,000,000 68,000,000   45,000,000                                                                         168,000,000                   (10,000,000)                                                                
Extinguishment of Debt, Amount           9,500,000,000                                                                         3,000,000,000 35,000,000         1,100,000,000                                                                        
Repayments of Assumed Debt                                                                                                       299,000,000         3,900,000,000     415,000,000                                                  
Early Repayment Of Senior Debt                                                                                       49,000,000                                                                                  
Long-term Debt, by Maturity [Abstract]                                                                                                                                                                          
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 312,000,000 312,000,000                                                                                                                                                                      
Long-term Debt, Maturities, Repayments of Principal in Year Two 1,052,000,000 1,052,000,000                                                                                                                                                                      
Long-term Debt, Maturities, Repayments of Principal in Year Three 751,000,000 751,000,000                                                                                                                                                                      
Long-term Debt, Maturities, Repayments of Principal in Year Four 700,000,000 700,000,000                                                                                                                                                                      
Long-term Debt, Maturities, Repayments of Principal in Year Five 3,700,000,000 3,700,000,000                                                                                                                                                                      
Long-term Debt, Maturities, Repayments of Principal after Year Five $ 13,539,000,000 $ 13,539,000,000