ACQUISITIONS (Details) (USD $)	3 Months Ended													12 Months Ended								1 Months Ended		12 Months Ended		1 Months Ended		3 Months Ended		12 Months Ended							3 Months Ended	12 Months Ended				3 Months Ended		1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2013 8% Convertible Perpetual Preferred Stock [Member]	Dec. 31, 2013 5.75% Convertible Perpetual Preferred Stock, Series 1 [Member]	May 31, 2013 Plains Exploration & Production Company [Member]		Dec. 31, 2013 Plains Exploration & Production Company [Member]		Jun. 30, 2013 McMoRan Exploration Co [Member]	May 31, 2013 McMoRan Exploration Co [Member]	Jun. 30, 2014 McMoRan Exploration Co [Member]	Jun. 30, 2013 McMoRan Exploration Co [Member]	Dec. 31, 2013 McMoRan Exploration Co [Member]		Dec. 31, 2012 McMoRan Exploration Co [Member]	Jun. 03, 2013 McMoRan Exploration Co [Member]	Jun. 03, 2013 McMoRan Exploration Co [Member] Common Stock [Member]		Jun. 03, 2013 McMoRan Exploration Co [Member] 5.75% Convertible Perpetual Preferred Stock, Series 2 [Member]	Mar. 31, 2013 Kokkola Cobalt Chemicals Refinery [Member]	Dec. 31, 2013 Kokkola Cobalt Chemicals Refinery [Member]	Mar. 29, 2013 Kokkola Cobalt Chemicals Refinery [Member]	Dec. 31, 2013 Intersubsegment Eliminations [Member]		Dec. 31, 2013 Bank Term Loan [Member]	Feb. 14, 2013 Bank Term Loan [Member]	Feb. 28, 2012 Senior Notes [Member]	Mar. 31, 2013 Senior Notes [Member]	Mar. 07, 2013 Senior Notes [Member]	Dec. 31, 2013 Oil and Gas Operations Segment [Member]		Dec. 31, 2012 Oil and Gas Operations Segment [Member]	Dec. 31, 2011 Oil and Gas Operations Segment [Member]	Mar. 29, 2013 Lundin Mining Corporation [Member] Kokkola Cobalt Chemicals Refinery [Member]	Mar. 29, 2013 La Generale des Carrieres et des Mines [Member] Kokkola Cobalt Chemicals Refinery [Member]
Business Acquisition [Line Items]
Dividends Payable, Date to be Paid							Feb. 03, 2014															May 31, 2013
Business Acquisition, Effective Date of Acquisition																						May 31, 2013		May 31, 2013						Jun. 03, 2013							Mar. 29, 2013
Debt Instrument, Face Amount																																										$ 4,000,000,000	$ 4,000,000,000			$ 6,500,000,000
Proceeds from Issuance of Long-term Debt																																												2,970,000,000	6,400,000,000
Term of Debt Agreement																																										5 years
Business Acquisition, Agreed-Upon Equity Interest Issued or Issuable, Number of Shares Per Share of Target Company																						0.6531
Business Acquisitions, Agreed-Upon Cost of Entity Acquired, Cash Paid Per Share																						$ 25.00											$ 14.75
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares																						91,161,000
Payments to Acquire Businesses, Gross																						3,800,000,000				1,720,000,000											34,000,000
Payments of Dividends														2,537,000,000								411,000,000
Common Stock, Dividends, Per Share, Declared														$ 2.25		$ 1.25		$ 1.50				$ 3
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	8,919,000,000													8,919,000,000								6,639,000,000		6,639,000,000						3,128,000,000			3,128,000,000							(848,000,000)
Common Stock, Shares, Outstanding																						132,280,000												112,362,000.000	[1]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Excluding Shares Related to Employee Stock-based Awards																						86,392,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Related to Employee Stock-based Awards																						4,769,000
Share Price																						$ 31.05					$ 16.63						$ 16.75
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable																						2,831,000,000
Payment to Acquire Businesses, Excluding Payments for Employee Stock-based Awards																						3,725,000,000	[2]			1,657,000,000
Other Payments to Acquire Businesses																						83,000,000				63,000,000
Payment to Acquire Businesses, Per Share Consideration, Total																						3,300,000,000
Payment to Acquire Businesses, Consideration for Equity Awards																						7,000,000
Buinsess Acquisition, Agreed-Upon Royalty Trust Units Issued or Issuable, Per Share of Target Company																										1.15
Royalty Interest in Future Production																																	5.00%
Business Acquisition, Date of Acquisition Agreement																																Dec. 05, 2012
Investment Owned, Balance, Shares																											51,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	0	[3]												0	[3]									848,000,000	[3]		848,000,000			0	[3]			854,000,000		554,000,000				(848,000,000)	[3]
Number Of Shares Of Investee Preferred Stock Purchased																											500,000
Preferred Stock, Dividend Rate, Percentage																				8.00%	5.75%						5.75%
Payments for Repurchase of Preferred Stock and Preference Stock														228,000,000		0		0
Royalty Trust Units Issued, Conversion of Debt or Equity Instrument														17,700,000
Cost-method investment																											432,000,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value																										1,400,000,000
Gain on investment in McMoRan Exploration Co. (MMR)														128,000,000		0		0										128,000,000	128,000,000	128,000,000
Revenues														20,921,000,000	[4]	18,010,000,000	[4]	20,880,000,000	[4]																												2,616,000,000	[5]	0	0
Operating income	1,650,000,000	[6],[7]	1,707,000,000	[6]	639,000,000	[6]	1,355,000,000	[6]	1,358,000,000	[8],[9]	1,411,000,000	1,311,000,000	1,734,000,000	5,351,000,000	[6],[7]	5,814,000,000	[8],[9]	9,140,000,000																													450,000,000		0	0
Business Combination, Acquisition Related Costs	4,000,000		1,000,000		61,000,000		14,000,000		9,000,000					80,000,000		9,000,000																															74,000,000
Income Tax Expense (Benefit), Changes in Deferred Tax Liabilities and Deferred Tax Asset Valuation Allowances	16,000,000				183,000,000									199,000,000
Deferred Finance Costs, Noncurrent, Net	107,000,000								26,000,000					107,000,000		26,000,000								96,000,000
Gain (Loss) on Disposition of Oil and Gas Property														77,000,000
Company's direct ownership percentage																																							56.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																																																			24.00%	20.00%
Business Combination, Consideration Transferred																																					382,000,000
Business Acquisition, Cash Consideration Funding Percentage																																							70.00%												30.00%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High																																							$ 110,000,000
Buisness Combination, Term of Contingent Consideration																																						3 years

[1] Excluded 51 million shares of MMR common stock owned by FCX through its acquisition of PXP on May 31, 2013.

[2] Cash consideration included the payment of $25.00 in cash for each PXP share ($3.3 billion), cash paid in lieu of any fractional shares of FCX common stock, cash paid for certain equity awards ($7 million), and the value of the $3 per share PXP special cash dividend ($411 million) paid on May 31, 2013.

[3] PXP owned 51 million shares of MMR common stock, which was eliminated in FCX's consolidated balance sheet at the acquisition date of MMR.

[4] Revenues are attributed to countries based on the location of the customer.

[5] Included net charges of $312 million for unrealized and noncash realized losses on crude oil and natural gas derivative contracts that were assumed in connection with FCX's acquisition of PXP.

[6] Included charges of $14 million ($10 million to net income attributable to FCX common stockholders or $0.01 per share) in the first quarter, $61 million ($36 million to net income attributable to FCX common stockholders or $0.04 per share) in the second quarter, $1 million ($1 million to net income attributable to FCX common stockholders) in the third quarter, $4 million ($3 million to net income attributable to FCX common stockholders) in the fourth quarter and $80 million ($50 million to net income attributable to FCX common stockholders or $0.05 per share) for the year for transaction and related costs principally associated with the acquisitions of PXP and MMR.

[7] Included charges in the fourth quarter and for the year of (i) $76 million ($49 million to net income attributable to FCX common stockholders or $0.05 per share) associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles, (ii) $37 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) associated with the restructuring of an executive employment arrangement and (iii) $36 million ($13 million to net income attributable to FCX common stockholders or $0.01 per share) associated with a new labor agreement at Cerro Verde.

[8] Included a gain of $59 million ($31 million to net income attributable to FCX common stockholders or $0.03 per share) in the fourth quarter and for the year for the settlement of the insurance claim for business interruption and property damage relating to the 2011 incidents affecting PT-FI's concentrate pipelines. Refer to Note 12 for further discussion.

[9] Included a charge of $16 million ($8 million to net income attributable to FCX common stockholders or $0.01 per share) in the fourth quarter and for the year associated with a labor agreement at Candelaria. Also included charges of $9 million ($7 million to net income attributable to FCX common stockholders or $0.01 per share) for costs associated with the PXP and MMR transactions.