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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 7 Months Ended | 12 Months Ended |  | 1 Months Ended |  |  |  | 3 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 31, 2013 Cash Settled Restricted Stock Units [Member] | Dec. 31, 2013 Cash Settled Restricted Stock Units [Member] | Dec. 31, 2013 Restricted Stock Units (RSUs) [Member] | Dec. 31, 2012 Restricted Stock Units (RSUs) [Member] | Dec. 31, 2011 Restricted Stock Units (RSUs) [Member] | May 31, 2013 Stock Appreciation Rights (SARs) [Member] | Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member] | Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member] | Dec. 31, 2013 Employee Stock Option [Member] | Dec. 31, 2012 Employee Stock Option [Member] | Dec. 31, 2011 Employee Stock Option [Member] | Dec. 31, 2013 Minimum [Member] Stock Appreciation Rights (SARs) [Member] | Dec. 31, 2013 Maximum [Member] Stock Appreciation Rights (SARs) [Member] | May 31, 2013 Freeport-McMoRan Oil & Gas [Member] Restricted Stock Units (RSUs) [Member] | May 31, 2013 Plains Exploration & Production Company [Member] Cash Settled Restricted Stock Units [Member] | May 31, 2013 Plains Exploration & Production Company [Member] Restricted Stock Units (RSUs) [Member] | May 31, 2013 Plains Exploration & Production Company [Member] Stock Appreciation Rights (SARs) [Member] | Jun. 03, 2013 McMoRan Exploration Co [Member] | Jun. 03, 2013 McMoRan Exploration Co [Member] Restricted Stock Units (RSUs) [Member] | Jun. 03, 2013 McMoRan Exploration Co [Member] Employee Stock Option [Member] | Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member] | Dec. 31, 2013 Cash Settled Restricted Stock Units [Member] | Dec. 31, 2013 Employment Restructuring Arrangement [Member] Restricted Stock Units (RSUs) [Member]
Stockholder's Equity and Stock-based Compensation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Based Compensation Included In General And Administrative Expense | $ 145 |  | $ 77 |  | $ 90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 37
Stock Based Compensation Included In Production and Delivery Expense | 28 |  | 23 |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized costs | (13) |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 186 |  | 100 |  | 115 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax Benefit and Noncontrolling Interests' Share | (66) |  | (39) |  | (46) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impact on net income | 107 |  | 61 |  | 69 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Cash Settled Restricted Stock Units Converted At Acquisition Date |  |  |  |  |  |  | 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock appreciation rights outstanding and included in stock options | 1,927,037 |  | 39,336 |  | 69,672 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Converted (in dollars per option) | $ 27.64 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and accrued liabilities | 3,700 |  | 2,324 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16 | 17 |
Other Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19 |
Share-based Compensation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period (in number of options/units) | 31,472,559 | [1] | 27,967,145 | [1] | 26,930,444 |  |  |  | 889,698 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Options Converted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,203,392 |  | 7,203,392 |  |  |
Stock Appreciation Rights Converted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,374,601 |  |  |  |  |  |
Granted (in number of options/units) | 5,479,930 |  | 5,050,500 |  | 4,230,500 |  |  | 1,430 | 2,492,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000
Restricted Stock Units Converted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,252,185 | 2,259,708 | 1,238,685 |  |  | 13,500 |  |  |  |
Exercised (in number of options/units) | (976,220) |  | (1,300,273) |  | (3,044,174) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in number of options/units) |  |  |  |  |  |  |  | (1,430) | (356,275) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expired/Forfeited (in number of options/units) | (423,601) |  | (244,813) |  | (149,625) |  |  | (39,896) | (22,732) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period (in number of options/units) | 45,130,661 |  | 31,472,559 | [1] | 27,967,145 | [1] |  | 2,219,812 | 4,255,476 | 889,698 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options, stock appreciation rights, restricted stock units and additional disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average exercise price at beginning of period (in dollars per option) | $ 37.40 |  | $ 34.90 |  | $ 30.22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units - weighted average grant date fair value |  |  |  |  |  |  |  | $ 31.05 | $ 35.13 | $ 44.35 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per option) | $ 35.00 |  | $ 46.32 |  | $ 55.43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted - Weighted Average Grant Date Fair Value |  |  |  |  |  |  |  | $ 32.94 | $ 34.84 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units converted (average grant date fair value) |  |  |  |  |  |  |  | $ 31.05 | $ 31.05 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Appreciation Rights converted - weighted average exercise price | $ 27.34 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in dollars per option) | $ 18.77 |  | $ 16.68 |  | $ 21.88 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested - weighted average grant date fair value |  |  |  |  |  |  |  | $ 31.05 | $ 41.96 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expired/Forfeited (in dollars per option) | $ 41.83 |  | $ 45.23 |  | $ 37.61 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited - weighted average grant date fair value |  |  |  |  |  |  |  | $ 31.05 | $ 31.92 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average exercise price at end of period (in dollars per option) | $ 35.39 |  | $ 37.40 |  | $ 34.90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average remaining contractual term (in years) | 5 years 7 months |  |  |  |  |  |  | 1 year 11 months | 4 years 1 month |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested and exercisable at end of period (in options) | 31,748,346 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average option price of vested and exercisable (in dollars per option) | $ 33.40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of outstanding | 239 |  |  |  |  |  |  | 84 | 161 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average remaining contractual term of vested and exercisable (in years) | 4 years 8 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of vested and exercisable | 210 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions and methodology [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average expected volatility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48.90% | 52.00% | 50.90% | 28.80% | 34.80% |  |  |  |  |  |  |  |  |  |
Expected life of options (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 years 7 months 27 days | 4 years 6 months 15 days | 4 years 4 months 2 days | 1 year | 4 years |  |  |  |  |  |  |  |  |  |
Weighted-average expected dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.60% | 3.30% | 3.10% | 1.80% |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.70% | 0.70% | 1.60% | 0.10% | 1.10% |  |  |  |  |  |  |  |  |  |
Weighted-average grant-date fair value (in dollars per option) |  |  |  |  |  |  |  |  |  |  |  | $ 7.94 | $ 7.00 |  | $ 10.98 | $ 15.60 | $ 20.58 |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 10 | 34 | 101 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of options vested |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 101 | 77 | 89 |  |  |  |  |  |  |  |  |  |  |  |
Total grant-date fair value of restricted stock units granted |  |  |  |  |  |  |  |  | 125 |  |  |  |  |  |  |  |  |  |  |  |  | 38 |  |  |  |  |  |  |
Total intrinsic value of restricted stock units vested |  |  |  |  |  |  |  |  | 12 | 28 | 69 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation cost related to unvested stock options expected to be recognized over a weighted-average period |  |  |  |  |  |  |  |  | 38 |  |  |  | 6 | 6 | 76 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average period used in calculating unrecognized compensation cost, stock options (in years) |  |  |  |  |  |  |  |  | 2 years 1 month |  |  |  |  | 2 years 1 month | 1 year 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares tendered to pay exercise price and minimum required taxes (in shares) | 3,294,624 | [2] | 515,558 | [2] | 936,811 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received from exercise of stock options | 8 |  | 15 |  | 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual tax benefit realized for tax deductions | 8 |  | 16 |  | 45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for employee taxes | $ 105 |  | $ 16 |  | $ 45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Included 39,336 SARs at December 31, 2012, and 69,672 SARs at December 31, 2011.
[2] | Under terms of the related plans, upon exercise of stock options and vesting of RSUs, employees may tender existing FCX shares to FCX to pay the exercise price and/or the minimum required taxes.

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