Freeport-McMoRan (FCX) 10-K 27 Feb 14 2013 FY Annual report Financial data

DOCUMENT_AND_ENTITY_INFORMATIO

DOCUMENT AND ENTITY INFORMATION (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 14, 2014	Jun. 28, 2013
Document Information [Line Items]	'	'	'
Entity Registrant Name	'FREEPORT MCMORAN COPPER & GOLD INC	'	'
Entity Central Index Key	'0000831259	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$28,300,000,000
Entity Common Stock, Shares Outstanding	'	1,038,417,983	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Income Statement [Abstract]	'		'		'
Revenues	$20,921	[1]	$18,010	[1]	$20,880	[1]
Cost of sales:	'		'		'
Production and delivery	11,840		10,382		9,898
Depreciation, depletion and amortization	2,797		1,179		1,022
Total cost of sales	14,637		11,561		10,920
Selling, general and administrative expenses	657		431		415
Mining exploration and research expenses	210		285		271
Environmental obligations and shutdown costs	66		-22		134
Gain on insurance settlement	0		-59		0
Total costs and expenses	15,570		12,196		11,740
Operating income	5,351	[2],[3]	5,814	[4],[5]	9,140
Interest expense, net	-518		-186		-312
Losses on early extinguishment of debt	-35		-168		-68
Gain on investment in McMoRan Exploration Co. (MMR)	128		0		0
Other (expense) income, net	-13		27		58
Income before income taxes and equity in affiliated companies' net earnings	4,913		5,487		8,818
Provision for income taxes	-1,475		-1,510		-3,087
Equity in affiliated companies’ net earnings	3		3		16
Net income	3,441	[6]	3,980	[7]	5,747
Net income and preferred dividends attributable to noncontrolling interests	-783		-939		-1,187
Net income attributable to FCX common stockholders	$2,658	[10],[2],[3],[6],[8],[9]	$3,041	[11],[4],[5],[7]	$4,560
Net income per share attributable to FCX common stockholders:	'		'		'
Basic (in dollars per share)	$2.65		$3.20		$4.81
Diluted (in dollars per share)	$2.64	[10],[2],[3],[6],[8],[9]	$3.19	[11],[4],[5],[7]	$4.78
Weighted-average common shares outstanding:	'		'		'
Basic (in shares)	1,002		949		947
Diluted (in shares)	1,006		954		955
Dividends declared per share of common stock (in dollars per share)	$2.25		$1.25		$1.50
[1]	Revenues are attributed to countries based on the location of the customer.
[2]	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.
[3]	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.
[4]	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.
[5]	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.
[6]	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
[7]	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.
[8]	Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.
[9]	Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.
[10]	Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.
[11]	Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Net income	$3,441	[1]	$3,980	[2]	$5,747
Defined benefit plans:	'		'		'
Actuarial gains (losses) arising during the period	85		-66		-137
Prior service costs arising during the period	-21		0		0
Amortization of unrecognized amounts included in net periodic benefit costs	30		26		15
Adjustment to deferred tax valuation allowance	0		-1	[3],[4]	-20	[3],[4]
Translation adjustments and unrealized losses on securities	4		-1		-3
Other comprehensive income (loss)	98		-42		-145
Total comprehensive income	3,539		3,938		5,602
Total comprehensive income and preferred dividends attributable to noncontrolling interests	-780		-938		-1,184
Total comprehensive income attributable to FCX common stockholders	$2,759		$3,000		$4,418
[1]	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
[2]	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.
[3]	Included tax benefits (provision) totaling $81 million for 2011, $39 million for 2012 and $(37) million for 2013.
[4]	Included net actuarial gains (losses), net of noncontrolling interest, totaling $(215) million for 2011, $(103) million for 2012 and $137 million for 2013. The year 2013 also included $33 million for prior service costs.

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Cash flow from operating activities:	'		'		'
Net income	$3,441,000,000	[1]	$3,980,000,000	[2]	$5,747,000,000
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	2,797,000,000		1,179,000,000		1,022,000,000
Net losses on crude oil and natural gas derivative contracts	334,000,000		0		0
Gain on investment in McMoRan Exploration Co. (MMR)	-128,000,000		0		0
Stock-based compensation	173,000,000		100,000,000		117,000,000
Pension plans contributions	-71,000,000		-140,000,000		-46,000,000
Net charges for environmental and asset retirement obligations, including accretion	164,000,000		22,000,000		208,000,000
Payments for environmental and asset retirement obligations	-237,000,000		-246,000,000		-170,000,000
Losses on early extinguishment of debt	35,000,000		168,000,000		68,000,000
Deferred income taxes	277,000,000		269,000,000		523,000,000
Increase in long-term mill and leach stockpiles	-431,000,000		-269,000,000		-262,000,000
Other, net	162,000,000		128,000,000		-126,000,000
(Increases) decreases in working capital and changes in other tax payments, excluding amounts from acquisitions:	'		'		'
Accounts receivable	49,000,000		-365,000,000		1,246,000,000
Inventories	-288,000,000		-729,000,000		-431,000,000
Other current assets	26,000,000		-76,000,000		-57,000,000
Accounts payable and accrued liabilities	-359,000,000		209,000,000		-387,000,000
Accrued income taxes and changes in other tax payments	195,000,000		-456,000,000		-832,000,000
Net cash provided by operating activities	6,139,000,000		3,774,000,000		6,620,000,000
Capital expenditures:	'		'		'
North America copper mines	-1,066,000,000		-825,000,000		-494,000,000
South America	-1,145,000,000		-931,000,000		-603,000,000
Indonesia	-1,030,000,000		-843,000,000		-648,000,000
Africa	-205,000,000		-539,000,000		-193,000,000
Molybdenum mines	-164,000,000		-245,000,000		-438,000,000
U.S. oil and gas operations	-1,436,000,000		0		0
Other	-240,000,000		-111,000,000		-158,000,000
Acquisition of Plains Exploration & Production Company, net of cash acquired	-3,465,000,000		0		0
Acquisition of MMR, net of cash acquired	-1,628,000,000		0		0
Acquisition of cobalt chemical business, net of cash acquired	-348,000,000		0		0
Restricted cash and other, net	-181,000,000		31,000,000		-1,000,000
Net cash used in investing activities	-10,908,000,000		-3,463,000,000		-2,535,000,000
Cash flow from financing activities:	'		'		'
Proceeds from debt	11,501,000,000		3,029,000,000		48,000,000
Repayments of debt	-5,476,000,000		-3,186,000,000		-1,313,000,000
Redemption of MMR preferred stock	-228,000,000		0		0
Cash dividends and distributions paid:	'		'		'
Common stock	-2,281,000,000		-1,129,000,000		-1,423,000,000
Noncontrolling interests	-256,000,000		-113,000,000		-391,000,000
Debt financing costs	-113,000,000		-51,000,000		-10,000,000
Contributions from noncontrolling interests	0		15,000,000		62,000,000
Net (payments for) proceeds from stock-based awards	-97,000,000		-1,000,000		3,000,000
Excess tax (expense) benefit from stock-based awards	-1,000,000		8,000,000		23,000,000
Net cash provided by (used in) financing activities	3,049,000,000		-1,428,000,000		-3,001,000,000
Net (decrease) increase in cash and cash equivalents	-1,720,000,000		-1,117,000,000		1,084,000,000
Cash and cash equivalents at beginning of year	3,705,000,000		'		4,822,000,000
Cash and cash equivalents at end of year	$1,985,000,000		$3,705,000,000		'
[1]	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
[2]	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013		Dec. 31, 2012
Current assets:	'		'
Cash and cash equivalents	$1,985,000,000		$3,705,000,000
Trade accounts receivable	1,728,000,000		927,000,000
Income taxes receivable	419,000,000		436,000,000
Other accounts receivable	415,000,000		266,000,000
Inventories:	'		'
Materials and supplies, net	1,730,000,000	[1]	1,504,000,000	[1]
Mill and leach stockpiles	1,705,000,000		1,672,000,000
Product	1,583,000,000		1,400,000,000
Other current assets	407,000,000		387,000,000
Total current assets	9,972,000,000		10,297,000,000
Property, plant, equipment and mining development costs, net	24,042,000,000		20,999,000,000
Oil and gas properties, net - full cost method:	'		'
Subject to amortization, less accumulated amortization of $1,357 as of December 31, 2013	12,472,000,000		0
Not subject to amortization	10,887,000,000		0
Long-term mill and leach stockpiles	2,386,000,000		1,955,000,000
Goodwill	1,916,000,000	[2]	0
Other assets	1,798,000,000		2,189,000,000
Total assets	63,473,000,000		35,440,000,000
Current liabilities:	'		'
Accounts payable and accrued liabilities	3,700,000,000		2,324,000,000
Dividends payable	333,000,000		299,000,000
Current portion of debt	312,000,000		2,000,000
Current portion of environmental and asset retirement obligations	236,000,000		241,000,000
Accrued income taxes	184,000,000		93,000,000
Current portion of deferred income taxes	8,000,000		384,000,000
Total current liabilities	4,773,000,000		3,343,000,000
Long-term debt, less current portion	20,394,000,000		3,525,000,000
Deferred income taxes	7,410,000,000		3,490,000,000
Environmental and asset retirement obligations, less current portion	3,259,000,000		2,127,000,000
Other liabilities	1,690,000,000		1,644,000,000
Total liabilities	37,526,000,000		14,129,000,000
Redeemable noncontrolling interest	716,000,000		0
FCX stockholders’ equity:	'		'
Common stock, par value $0.10, 1,165 shares and 1,073 shares issued, respectively	117,000,000		107,000,000
Capital in excess of par value	22,161,000,000		19,119,000,000
Retained earnings	2,742,000,000		2,399,000,000
Accumulated other comprehensive loss	-405,000,000		-506,000,000
Common stock held in treasury – 127 shares and 124 shares, respectively, at cost	-3,681,000,000		-3,576,000,000
Total FCX stockholders’ equity	20,934,000,000		17,543,000,000
Noncontrolling interests	4,297,000,000		3,768,000,000
Total equity	25,231,000,000		21,311,000,000
Total liabilities and equity	$63,473,000,000		$35,440,000,000
[1]	Materials and supplies inventory was net of obsolescence reserves totaling $24 million at December 31, 2013, and $27 million at December 31, 2012.
[2]	During the fourth quarter of 2013, FCX conducted a qualitative goodwill impairment assessment by examining relevant events and circumstances that could have a negative impact on FCX's goodwill, such as macroeconomic conditions, industry and market conditions, cost factors that have a negative effect on earnings and cash flows, overall financial performance, dispositions and acquisitions, and any other relevant events or circumstances. After assessing the relevant events and circumstances for the qualitative impairment assessment, FCX determined that performing a quantitative goodwill impairment test was unnecessary, and no goodwill impairment was recognized.

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, except Per Share data, unless otherwise specified
FCX stockholders’ equity:	'	'
Common stock, par value per share (in dollars per share)	$0.10	$0.10
Common stock, shares issued	1,165	1,073
Common stock held in treasury, shares	127	124
Oil and gas properties, net - full cost method:	'	'
Accumulated amortization	$1,357	$0

CONSOLIDATED_STATEMENTS_OF_EQU

CONSOLIDATED STATEMENTS OF EQUITY (USD $)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock Held in Treasury [Member]	Total FCX Stockholders' Equity [Member]	Noncontrolling Interests [Member]
In Millions, unless otherwise specified
Balance at Dec. 31, 2010	$14,560	$107	$18,751	($2,590)	($323)	($3,441)	$12,504	$2,056
Balance (in shares) at Dec. 31, 2010	'	1,067	'	'	'	122	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Exercised and issued stock-based awards	48	0	48	0	0	0	48	0
Exercised and issued stock-based awards (in shares)	'	4	'	'	'	0	'	'
Stock-based compensation	117	0	117	0	0	0	117	0
Tax benefit for stock-based awards	24	'	24	'	'	'	24	'
Tender of shares for stock-based awards	-45	0	67	0	0	-112	-45	0
Tender of shares for stock-based awards (in shares)	'	0	'	'	'	1	'	'
Dividends on common stock	-1,424	0	0	-1,424	0	0	-1,424	0
Dividends to noncontrolling interests	-391	0	0	0	0	0	0	-391
Contributions from noncontrolling interests	62	'	'	'	'	'	'	62
Total comprehensive income (loss)	5,602	0	0	4,560	-142	0	4,418	1,184
Balance at Dec. 31, 2011	18,553	107	19,007	546	-465	-3,553	15,642	2,911
Balance (in shares) at Dec. 31, 2011	'	1,071	'	'	'	123	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Exercised and issued stock-based awards	15	0	15	0	0	0	15	0
Exercised and issued stock-based awards (in shares)	'	2	'	'	'	0	'	'
Stock-based compensation	100	0	100	0	0	0	100	0
Tax benefit for stock-based awards	7	'	7	'	'	'	7	'
Tender of shares for stock-based awards	-16	0	7	0	0	-23	-16	0
Tender of shares for stock-based awards (in shares)	'	0	'	'	'	1	'	'
Dividends on common stock	-1,188	0	0	-1,188	0	0	-1,188	0
Dividends to noncontrolling interests	-113	0	0	0	0	0	0	-113
Change in ownership interests	0	'	-17	'	'	'	-17	17
Contributions from noncontrolling interests	15	'	'	'	'	'	'	15
Total comprehensive income (loss)	3,938	0	0	3,041	-41	0	3,000	938
Balance at Dec. 31, 2012	21,311	107	19,119	2,399	-506	-3,576	17,543	3,768
Balance (in shares) at Dec. 31, 2012	'	1,073	'	'	'	124	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Common stock issued to acquire Plains Exploration & Production Co.	2,831	9	2,822	0	0	0	2,831	0
Common stock issued to acquire Plains Exploration & Production Co. (in shares)	'	91	'	'	'	0	'	'
Exchange of employee stock-based awards in connection with acquisitions	67	0	67	0	0	0	67	0
Exercised and issued stock-based awards	9	1	8	0	0	0	9	0
Exercised and issued stock-based awards (in shares)	'	1	'	'	'	0	'	'
Stock-based compensation	153	0	153	0	0	0	153	0
Reserve on tax benefit for stock-based awards	-1	'	-1	0	0	0	-1	0
Tender of shares for stock-based awards	-105	0	0	0	0	-105	-105	0
Tender of shares for stock-based awards (in shares)	'	0	'	'	'	3	'	'
Dividends on common stock	-2,315	0	0	-2,315	0	0	-2,315	0
Dividends to noncontrolling interests	-236	0	0	0	0	0	0	-236
Noncontrolling interests' share of contributed capital in subsidiary	0	0	-7	0	0	0	-7	7
Redeemable noncontrolling interest dividends and related interest	-22	0	0	0	0	0	0	-22
Total comprehensive income (loss)	3,539	0	0	2,658	101	0	2,759	780
Balance at Dec. 31, 2013	$25,231	$117	$22,161	$2,742	($405)	($3,681)	$20,934	$4,297
Balance (in shares) at Dec. 31, 2013	'	1,165	'	'	'	127	'	'

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

'

Summary of Significant Accounting Policies

'

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation.  The consolidated financial statements of Freeport-McMoRan Copper & Gold Inc. (FCX) include the accounts of those subsidiaries where FCX directly or indirectly has more than 50 percent of the voting rights and has the right to control significant management decisions. The most significant entities that FCX consolidates include its 90.64 percent-owned subsidiary PT Freeport Indonesia (PT-FI), and its wholly owned subsidiaries, Freeport-McMoRan Corporation (FMC, formerly Phelps Dodge Corporation), Atlantic Copper, S.L.U. (Atlantic Copper) and FCX Oil & Gas Inc. (FM O&G). FCX acquired Plains Exploration & Production Company (PXP) and McMoRan Exploration Co. (MMR), collectively known as FM O&G, on May 31, 2013, and June 3, 2013, respectively. FCX’s results of operations include PXP's results beginning June 1, 2013, and MMR's results beginning June 4, 2013 (refer to Note 2 for further discussion). FCX’s unincorporated joint ventures with Rio Tinto plc (Rio Tinto) and Sumitomo Metal Mining Arizona, Inc. (Sumitomo) are reflected using the proportionate consolidation method (refer to Note 3 for further discussion). All significant intercompany transactions have been eliminated. Dollar amounts in tables are stated in millions, except per share amounts.

Investments in unconsolidated companies owned 20 percent or more are recorded using the equity method. Investments in companies owned less than 20 percent, and for which FCX does not exercise significant influence, are carried at cost.

Business Segments.  Subsequent to the acquisitions of PXP and MMR, FCX has organized its operations into six primary divisions – North America copper mines, South America mining, Indonesia mining, Africa mining, Molybdenum mines and United States (U.S.) oil and gas operations. Notwithstanding this structure, FCX internally reports information on a mine-by-mine basis for its mining operations. Therefore, FCX concluded that its operating segments include individual mines or operations relative to its mining operations. For oil and gas operations, FCX determines its operating segments on a country-by-country basis. Operating segments that meet certain financial thresholds are reportable segments. Refer to Note 16 for further discussion.

Use of Estimates.  The preparation of FCX’s financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the amounts reported in these financial statements and accompanying notes. The more significant areas requiring the use of management estimates include reserve estimation (minerals, and oil and natural gas); timing of transfers of oil and gas properties not subject to amortization into the full cost pool; asset lives for depreciation, depletion and amortization; environmental obligations; asset retirement obligations; estimates of recoverable copper in mill and leach stockpiles; deferred taxes and valuation allowances; reserves for contingencies and litigation; asset impairment, including estimates used to derive future cash flows associated with those assets; determination of fair value of assets acquired, liabilities assumed and redeemable noncontrolling interest, and recognition of goodwill and deferred taxes in connection with business combinations; pension benefits; and valuation of derivative instruments. Actual results could differ from those estimates.

Foreign Currencies.  For foreign subsidiaries whose functional currency is the U.S. dollar, monetary assets and liabilities denominated in the local currency are translated at current exchange rates, and non-monetary assets and liabilities, such as inventories, property, plant, equipment and development costs, are translated at historical rates. Gains and losses resulting from translation of such account balances are included in net income, as are gains and losses from foreign currency transactions. The functional currency for the majority of FCX's foreign operations is the U.S. dollar.

Cash Equivalents.  Highly liquid investments purchased with maturities of three months or less are considered cash equivalents.

Inventories.  The components of inventories include materials and supplies, mill and leach stockpiles, and product inventories. Product inventories mostly include finished goods (primarily concentrates and cathodes) at mining operations, and concentrates and work-in-process at Atlantic Copper’s smelting and refining operations (refer to Note 4 for further discussion). Mill and leach stockpiles, and inventories of materials and supplies, as well as salable products, are stated at the lower of weighted-average cost or market. Costs of finished goods and work-in-process (i.e., not materials and supplies) inventories include labor and benefits, supplies, energy, depreciation, depletion, amortization, site overhead costs and other necessary costs associated with the extraction and processing of ore, including, depending on the process, mining, haulage, milling, concentrating, smelting, leaching, solution extraction, refining, roasting and chemical processing. Corporate general and administrative costs are not included in inventory costs.

Work-in-Process. In-process inventories include mill and leach stockpiles at mining operations and Atlantic Copper's in-process product inventories. In-process inventories represent materials that are currently in the process of being converted to a salable product. Conversion processes for mining operations vary depending on the nature of the copper ore and the specific mining operation. For sulfide ores, processing includes milling and concentrating and results in the production of copper and molybdenum concentrates or, alternatively, copper cathode by concentrate leaching. For oxide ores and certain secondary sulfide ores, processing includes leaching of stockpiles, solution extraction and electrowinning (SX/EW) and results in the production of copper cathodes. In-process stockpile material is measured based on assays of the material included in these processes and projected recoveries. In-process inventories are valued based on the costs incurred to various points in the process, including depreciation relating to associated process facilities.

Both mill and leach stockpiles generally contain lower grade ores that have been extracted from the ore body and are available for copper recovery. For mill stockpiles, recovery is through milling, concentrating, smelting and refining or, alternatively, by concentrate leaching. For leach stockpiles, recovery is through exposure to acidic solutions that dissolve contained copper and deliver it in solution to extraction processing facilities. The recorded cost of mill and leach stockpiles includes mining and haulage costs incurred to deliver ore to stockpiles, depreciation, depletion, amortization and site overhead costs. Material is removed from the stockpiles at a weighted-average cost per pound.

Because it is generally impracticable to determine copper contained in mill and leach stockpiles by physical count, reasonable estimation methods are employed. The quantity of material delivered to mill and leach stockpiles is based on surveyed volumes of mined material and daily production records. Sampling and assaying of blasthole cuttings determine the estimated copper grade of the material delivered to mill and leach stockpiles.

Expected copper recovery rates for mill stockpiles are determined by metallurgical testing. The recoverable copper in mill stockpiles, once entered into the production process, can be produced into copper concentrate almost immediately.

Expected copper recovery rates for leach stockpiles are determined using small-scale laboratory tests, small- to large-scale column testing (which simulates the production-scale process), historical trends and other factors, including mineralogy of the ore and rock type. Total copper recovery in leach stockpiles can vary significantly from a low percentage to more than 90 percent depending on several variables, including processing methodology, processing variables, mineralogy and particle size of the rock. For newly placed material on active stockpiles, as much as 80 percent total copper recovery may be extracted during the first year, and the remaining copper may be recovered over many years.

Processes and recovery rates for mill and leach stockpiles are monitored regularly, and recovery rate estimates are adjusted periodically as additional information becomes available and as related technology changes. Adjustments to recovery rates will typically result in a future impact to the value of the material removed from the stockpiles at a revised weighted-average cost per pound of recoverable copper.

For Atlantic Copper, in-process inventories represent copper concentrates at various stages of conversion into anodes and cathodes. Atlantic Copper’s in-process inventories are valued at the weighted-average cost of the material fed to the smelting and refining process plus in-process conversion costs.

Finished Goods. Finished goods for mining operations represent salable products (e.g., copper and molybdenum concentrates, copper anodes, copper cathodes, copper rod, copper wire, molybdenum oxide, high-purity molybdenum chemicals and other metallurgical products, and various cobalt products). Finished goods are valued based on the weighted-average cost of source material plus applicable conversion costs relating to associated process facilities.

Property, Plant, Equipment and Mining Development Costs.  Property, plant, equipment and mining development costs are carried at cost. Mineral exploration costs, as well as drilling and other costs incurred for the purpose of converting mineral resources to proven and probable reserves or identifying new mineral resources at development or production stage properties, are charged to expense as incurred. Development costs are capitalized beginning after proven and probable mineral reserves have been established. Development costs include costs incurred resulting from mine pre-production activities undertaken to gain access to proven and probable reserves, including shafts, adits, drifts, ramps, permanent excavations, infrastructure and removal of overburden. Additionally, interest expense allocable to the cost of developing mining properties and to constructing new facilities is capitalized until assets are ready for their intended use.

Expenditures for replacements and improvements are capitalized. Costs related to periodic scheduled maintenance (i.e., turnarounds) are charged to expense as incurred. Depreciation for mining and milling life-of-mine assets, infrastructure and other common costs is determined using the unit-of-production (UOP) method based on total estimated recoverable proven and probable copper reserves (for primary copper mines) and proven and probable molybdenum reserves (for primary molybdenum mines). Development costs and acquisition costs for proven and probable mineral reserves that relate to a specific ore body are depreciated using the UOP method based on estimated recoverable proven and probable mineral reserves for the ore body benefited. Depreciation, depletion and amortization using the UOP method is recorded upon extraction of the recoverable copper or molybdenum from the ore body, at which time it is allocated to inventory cost and then included as a component of cost of goods sold. Other assets are depreciated on a straight-line basis over estimated useful lives of up to 39 years for buildings and three to 25 years for machinery and equipment, and mobile equipment.

Included in property, plant, equipment and mining development costs is value beyond proven and probable mineral reserves (VBPP), primarily resulting from FCX’s acquisition of FMC in 2007. The concept of VBPP has been interpreted differently by different mining companies. FCX’s VBPP is attributable to (i) mineralized material, which includes measured and indicated amounts, that FCX believes could be brought into production with the establishment or modification of required permits and should market conditions and technical assessments warrant, (ii) inferred mineral resources and (iii) exploration potential.

Carrying amounts assigned to VBPP are not charged to expense until the VBPP becomes associated with additional proven and probable mineral reserves and the reserves are produced or the VBPP is determined to be impaired. Additions to proven and probable mineral reserves for properties with VBPP will carry with them the value assigned to VBPP at the date acquired, less any impairment amounts.

Oil and Gas Properties. FCX follows the full cost method of accounting specified by the U.S. Securities and Exchange Commission's (SEC) rules whereby all costs associated with oil and gas property acquisition, exploration and development activities are capitalized into a cost center on a country-by-country basis. Such costs include internal general and administrative costs, such as payroll and related benefits and costs directly attributable to employees engaged in acquisition, exploration and development activities. General and administrative costs associated with production, operations, marketing and general corporate activities are charged to expense as incurred. Capitalized costs, along with estimated future costs to develop proved reserves and asset retirement costs that are not already included in oil and gas properties, net of related salvage value, are amortized to expense under the UOP method using engineers' estimates of the related, by-country proved oil and natural gas reserves.

The costs of unproved oil and gas properties are excluded from amortization until the properties are evaluated. Costs are transferred into the amortization base on an ongoing basis as the properties are evaluated and proved oil and natural gas reserves are established or impairment is determined. Unproved oil and gas properties are assessed periodically, at least annually, to determine whether impairment has occurred. FCX assesses oil and gas properties on an individual basis or as a group if properties are individually insignificant. The assessment considers the following factors, among others: intent to drill, remaining lease term, geological and geophysical evaluations, drilling results and activity, the assignment of proved reserves and the economic viability of development if proved reserves are assigned. During any period in which these factors indicate an impairment, the cumulative drilling costs incurred to date for such property and all or a portion of the associated leasehold costs are transferred to the full cost pool and are then subject to amortization. The transfer of costs into the amortization base involves a significant amount of judgment and may be subject to changes over time based on drilling plans and results, geological and geophysical evaluations, the assignment of proved oil and natural gas reserves, availability of capital and other factors. Costs not subject to amortization consist primarily of capitalized costs incurred for undeveloped acreage and wells in progress pending determination, together with capitalized interest for these projects. The ultimate evaluation of the properties will occur over a period of several years. Interest costs totaling $69 million in 2013 were capitalized on oil and gas properties not subject to amortization and in the process of development. Proceeds from the sale of oil and gas properties are accounted for as reductions to capitalized costs unless the reduction causes a significant change in proved reserves, which absent other factors, is generally described as a 25 percent or greater change, and significantly alters the relationship between capitalized costs and proved reserves attributable to a cost center, in which case a gain or loss is recognized.

Under the SEC full cost accounting rules, FCX reviews the carrying value of its oil and gas properties each quarter on a country-by-country basis. Under these rules, capitalized costs of oil and gas properties (net of accumulated depreciation, depletion and amortization, and related deferred income taxes) for each cost center may not exceed a “ceiling” equal to:

•

the present value, discounted at 10 percent, of estimated future net cash flows from the related proved oil and natural gas reserves, net of estimated future income taxes; plus

•

the cost of the related unproved properties not being amortized; plus

•

the lower of cost or estimated fair value of the related unproved properties included in the costs being amortized (net of related tax effects).

These rules require that FCX price its future oil and gas production at the twelve-month average of the first-day-of-the-month historical reference prices as adjusted for location and quality differentials. FCX's reference prices are West Texas Intermediate (WTI) for oil and the Henry Hub spot price for natural gas. Such prices are utilized except where different prices are fixed and determinable from applicable contracts for the remaining term of those contracts. The reserve estimates exclude the effect of any crude oil and natural gas derivatives FCX has in place. The estimated future net cash flows also exclude future cash outflows associated with settling asset retirement obligations included in the net book value of the oil and gas properties. The rules require an impairment if the capitalized costs exceed this “ceiling.” At December 31, 2013, the ceiling with respect to FCX's oil and gas properties exceeded the net capitalized costs, and therefore, no impairment was recorded.

Goodwill. Goodwill has an indefinite useful life and is not amortized, but rather is tested for impairment at least annually during the fourth quarter, unless events occur or circumstances change between annual tests that would more likely than not reduce the fair value of a related reporting unit below its carrying value. Impairment occurs when the carrying amount of goodwill exceeds its implied fair value. FCX generally uses a discounted cash flow model to determine if the carrying value of a reporting unit, including goodwill, is less than the fair value of the reporting unit. FCX's approach to allocating goodwill includes the identification of the reporting unit it believes has contributed to the excess purchase price and includes consideration of the reporting unit's potential for future growth. Goodwill arose in 2013 with FCX's acquisitions of PXP and MMR, and has been allocated to the U.S. oil and gas reporting unit. Events affecting crude oil and natural gas prices may cause a decrease in the fair value of the reporting unit, and FCX could have an impairment of its goodwill in future periods. When a sale of oil and gas properties occurs, goodwill is allocated to that property based on the relationship of the fair value of the property sold to the total reporting unit's fair value. A significant sale of oil and gas properties may represent a triggering event that requires goodwill to be evaluated for impairment.

Asset Impairment for Mining Operations. FCX reviews and evaluates its mining long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Mining long-lived assets are evaluated for impairment under the two-step model. An impairment is considered to exist if total estimated future cash flows on an undiscounted basis are less than the carrying amount of the asset. Once it is determined that an impairment exists, an impairment loss is measured as the amount by which the asset carrying value exceeds its fair value. Fair value is generally determined using valuation techniques, such as discounted cash flows.

In evaluating mining operations’ long-lived assets for recoverability, estimates of after-tax undiscounted future cash flows of FCX’s individual mining operations are used, with impairment losses measured by reference to fair value. As quoted market prices are unavailable for FCX’s individual mining operations, fair value is determined through the use of discounted estimated future cash flows. Estimated cash flows used to assess recoverability of long-lived assets and measure the fair value of FCX’s mining operations are derived from current business plans, which are developed using near-term price forecasts reflective of the current price environment and management’s projections for long-term average metal prices. Estimates of future cash flows include near- and long-term metal price assumptions; estimates of commodity-based and other input costs; proven and probable mineral reserve estimates, including any costs to develop the reserves and the timing of producing the reserves; and the use of appropriate current escalation and discount rates. FCX believes its estimates and models used to determine fair value are similar to what a market participant would use.

Deferred Mining Costs.  Stripping costs (i.e., the costs of removing overburden and waste material to access mineral deposits) incurred during the production phase of a mine are considered variable production costs and are included as a component of inventory produced during the period in which stripping costs are incurred. Major development expenditures, including stripping costs to prepare unique and identifiable areas outside the current mining area for future production that are considered to be pre-production mine development, are capitalized and amortized using the UOP method based on estimated recoverable proven and probable reserves for the ore body benefited. However, where a second or subsequent pit or major expansion is considered to be a continuation of existing mining activities, stripping costs are accounted for as a current production cost and a component of the associated inventory.

Environmental Expenditures. Environmental expenditures are charged to expense or capitalized, depending upon their future economic benefits. Accruals for such expenditures are recorded when it is probable that obligations have been incurred and the costs can be reasonably estimated. Environmental obligations attributed to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) or analogous state programs are considered probable when a claim is asserted, or is probable of assertion, and FCX, or any of its subsidiaries, have been associated with the site. Other environmental remediation obligations are considered probable based on specific facts and circumstances. FCX’s estimates of these costs are based on an evaluation of various factors, including currently available facts, existing technology, presently enacted laws and regulations, remediation experience, whether or not FCX is a potentially responsible party (PRP) and the ability of other PRPs to pay their allocated portions. With the exception of those obligations assumed in the acquisition of FMC that were recorded at estimated fair values (refer to Note 12 for further discussion), environmental obligations are recorded on an undiscounted basis. Where the available information is sufficient to estimate the amount of the obligation, that estimate has been used. Where the information is only sufficient to establish a range of probable liability and no point within the range is more likely than any other, the lower end of the range has been used. Possible recoveries of some of these costs from other parties are not recognized in the consolidated financial statements until they become probable. Legal costs associated with environmental remediation (such as fees to outside law firms for work relating to determining the extent and type of remedial actions and the allocation of costs among PRPs) are included as part of the estimated obligation.

Environmental obligations assumed in the acquisition of FMC, which were initially recorded at fair value and estimated on a discounted basis, are accreted to full value over time through charges to interest expense. Adjustments arising from changes in amounts and timing of estimated costs and settlements may result in increases and decreases in these obligations and are calculated in the same manner as they were initially estimated. Unless these adjustments qualify for capitalization, changes in environmental obligations are charged to operating income when they occur.

FCX performs a comprehensive review of its environmental obligations annually and also reviews changes in facts and circumstances associated with these obligations at least quarterly.

Asset Retirement Obligations.  FCX records the fair value of estimated asset retirement obligations (AROs) associated with tangible long-lived assets in the period incurred. Retirement obligations associated with long-lived assets are those for which there is a legal obligation to settle under existing or enacted law, statute, written or oral contract or by legal construction. These obligations, which are initially estimated based on discounted cash flow estimates, are accreted to full value over time through charges to cost of sales. In addition, asset retirement costs (ARCs) are capitalized as part of the related asset’s carrying value and are depreciated over the asset’s respective useful life.

For mining operations, reclamation costs for disturbances are recognized as an ARO and as a related ARC (included in property, plant, equipment and mining development costs) in the period of the disturbance and depreciated primarily on a UOP basis. FCX’s AROs for mining operations consist primarily of costs associated with mine reclamation and closure activities. These activities, which are site specific, generally include costs for earthwork, revegetation, water treatment and demolition (refer to Note 12 for further discussion).

For oil and gas properties, the fair value of the legal obligation is recognized as an ARO and as a related ARC(included in oil and gas properties) in the period in which the well is drilled or acquired and is amortized on a UOP basis together with other capitalized costs. Substantially all of FCX’s oil and gas leases require that, upon termination of economic production, the working interest owners plug and abandon non-producing wellbores, remove platforms, tanks, production equipment and flow lines, and restore the wellsite (refer to Note 12 for further discussion).

At least annually, FCX reviews its ARO estimates for changes in the projected timing of certain reclamation and closure/restoration costs, changes in cost estimates and additional AROs incurred during the period.

Litigation Contingencies.  At least quarterly, FCX assesses the likelihood of any adverse judgments or outcomes related to legal matters (including pending or threatened litigation matters), as well as ranges of potential losses. A determination of the amount of the reserve required, if any, for litigation contingencies is made after analysis of known issues. FCX records reserves related to legal matters for which it believes it is probable that a loss has been incurred and the amount of such loss can be reasonably estimated. Where the available information is sufficient to estimate the amount of the obligation, that estimate has been used. Where the information is only sufficient to establish a range of probable liability and no point within the range is more likely than any other, the lower end of the range has been used. With respect to other matters, for which management has concluded that a loss is only reasonably possible or remote, or not reasonably estimable, no liability has been recorded. For losses assessed as reasonably possible, FCX discloses the nature of the contingency and an estimate of the possible loss or range of loss or states that such an estimate cannot be made. Costs incurred to defend claims are charged to expense as incurred.

Litigation is inherently unpredictable, and it is difficult to project the outcome of particular matters with reasonable certainty; therefore, the actual amount of any loss could differ from the litigation contingencies reflected in FCX's consolidated financial statements. Refer to Note 12 for further discussion of FCX's litigation contingencies.

Income and Other Taxes.  FCX accounts for deferred income taxes utilizing an asset and liability method, whereby deferred tax assets and liabilities are recognized based on the tax effects of temporary differences between the financial statements and the tax basis of assets and liabilities, as measured by current enacted tax rates (refer to Note 11 for further discussion). When appropriate, FCX evaluates the need for a valuation allowance to reduce deferred tax assets to amounts that are more likely than not realizable. The effect on deferred income tax assets and liabilities of a change in tax rates or laws is recognized in income in the period in which such changes are enacted.

FCX accounts for uncertain income tax positions using a threshold and measurement criteria for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. FCX’s policy associated with uncertain tax positions is to record accrued interest in interest expense and accrued penalties in other income and expenses rather than in the provision for income taxes (refer to Note 11 for further discussion).

With the exception of Tenke Fungurume Mining S.A.R.L. (TFM or Tenke) in the Democratic Republic of Congo (DRC), income taxes are provided on the earnings of FCX’s material foreign subsidiaries under the assumption that these earnings will be distributed. FCX has determined that undistributed earnings related to TFM are reinvested indefinitely or have been allocated toward specifically identifiable needs of the local operations, including, but not limited to, certain contractual obligations and future plans for potential expansions of production capacity. Changes in contractual obligations or future plans for potential expansion could result in accrual of additional deferred income taxes related to undistributed earnings of TFM. FCX has not provided deferred income taxes for other differences between the book and tax carrying amounts of its investments in material foreign subsidiaries as FCX considers its ownership positions to be permanent in duration, and quantification of the related deferred tax liability is not practicable.

FCX's operations are in multiple jurisdictions where uncertainties arise in the application of complex tax regulations. Some of these tax regimes are defined by contractual agreements with the local government, while others are defined by general tax laws and regulations. FCX and its subsidiaries are subject to reviews of its income tax filings and other tax payments, and disputes can arise with the taxing authorities over the interpretation of its contracts or laws. The final taxes paid may be dependent upon many factors, including negotiations with taxing authorities. In certain jurisdictions, FCX must pay a portion of the disputed amount to the local government in order to formally appeal the assessment. Such payment is recorded as a receivable if FCX believes the amount is collectible.

Derivative Instruments.  FCX may enter into derivative contracts to manage certain risks resulting from fluctuations in commodity prices (primarily copper, gold, crude oil and natural gas), foreign currency exchange rates and interest rates by creating offsetting market exposures. Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded in the balance sheet as either an asset or liability measured at its fair value. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative and the resulting designation. Refer to Note 14 for a summary of FCX’s outstanding derivative instruments at December 31, 2013, and a discussion of FCX’s risk management strategies for those designated as hedges.

Revenue Recognition.  FCX sells its products pursuant to sales contracts entered into with its customers. Revenue for all FCX’s products is recognized when title and risk of loss pass to the customer and when collectibility is reasonably assured. The passing of title and risk of loss to the customer are based on terms of the sales contract, generally upon shipment or delivery of product.

Revenues from FCX’s concentrate and cathode sales are recorded based on a provisional sales price or a final sales price calculated in accordance with the terms specified in the relevant sales contract. Revenues from concentrate sales are recorded net of treatment and all refining charges (including price participation, if applicable, as discussed below) and the impact of derivative contracts. Moreover, because a portion of the metals contained in copper concentrates is unrecoverable as a result of the smelting process, FCX’s revenues from concentrate sales are also recorded net of allowances based on the quantity and value of these unrecoverable metals. These allowances are a negotiated term of FCX’s contracts and vary by customer. Treatment and refining charges represent payments or price adjustments to smelters and refiners and are either fixed or, in certain cases, vary with the price of copper (referred to as price participation).

Under the long-established structure of sales agreements prevalent in the mining industry, copper contained in concentrate and cathode is generally provisionally priced at the time of shipment. The provisional prices are finalized in a specified future month (generally one to four months from the shipment date) based on quoted monthly average spot copper prices on the London Metal Exchange (LME) or the Commodity Exchange Inc. (COMEX), a division of the New York Mercantile Exchange (NYMEX). FCX receives market prices based on prices in the specified future month, which results in price fluctuations recorded to revenues until the date of settlement. FCX records revenues and invoices customers at the time of shipment based on then-current LME or COMEX prices, which results in an embedded derivative (i.e., a pricing mechanism that is finalized after the time of delivery) that is required to be bifurcated from the host contract. The host contract is the sale of the metals contained in the concentrates or cathodes at the then-current LME or COMEX price. FCX applies the normal purchases and normal sales scope exception in accordance with derivatives and hedge accounting guidance to the host contract in its concentrate or cathode sales agreements since these contracts do not allow for net settlement and always result in physical delivery. The embedded derivative does not qualify for hedge accounting and is adjusted to fair value through earnings each period, using the period-end forward prices, until the date of final pricing.

Gold sales are priced according to individual contract terms, generally the average London Bullion Market Association (London) price for a specified month near the month of shipment.

Substantially all of FCX’s 2013 molybdenum sales were priced based on prices published in Metals Week, Ryan’s Notes or Metal Bulletin, plus conversion premiums for products that undergo additional processing, such as ferromolybdenum and molybdenum chemical products. The majority of these sales use the average price of the previous month quoted by the applicable publication. FCX’s remaining molybdenum sales generally have pricing that is either based on the current month published prices or a fixed price.

PT-FI concentrate sales and TFM metal sales are subject to certain royalties, which are recorded as a reduction to revenues (refer to Note 13 for further discussion).

Oil and gas revenue from FCX's interests in producing wells is recognized upon delivery and passage of title, net of any royalty interests or other profit interests in the produced product. Oil sales are primarily under contracts with prices based upon regional benchmarks. Approximately 50 percent of gas sales are priced monthly using industry recognized, published index pricing, and the remainder is priced daily on the spot market. Gas revenue is recorded using the sales method for gas imbalances. If FCX's sales of production volumes for a well exceed its portion of the estimated remaining recoverable reserves of the well, a liability is recorded. No receivables are recorded for those wells on which FCX has taken less than its ownership share of production unless the amount taken by other parties exceeds the estimate of their remaining reserves. There were no material gas imbalances at December 31, 2013.

Stock-Based Compensation. Compensation costs for share-based payments to employees are measured at fair value and charged to expense over the requisite service period for awards that are expected to vest. The fair value of stock options is determined using the Black-Scholes-Merton option valuation model. The fair value for stock-settled restricted stock units (RSUs) is based on FCX's stock price on the date of grant. Shares of common stock are issued at the vesting date for stock-settled RSUs. The fair value for liability-classified awards (i.e., cash-settled stock appreciation rights (SARs) and cash-settled RSUs) is remeasured each reporting period using the Black-Scholes-Merton option valuation model for SARs and FCX's stock price for cash-settled RSUs. FCX estimates forfeitures at the time of grant and revises those estimates in subsequent periods through the final vesting date of the awards if actual forfeitures differ from those estimates. FCX has elected to recognize compensation costs for stock option awards and SARs that vest over several years on a straight-line basis over the vesting period, and for RSUs on the graded-vesting method over the vesting period. Refer to Note 10 for further discussion.

Earnings Per Share.  FCX’s basic net income per share of common stock was calculated by dividing net income attributable to FCX common stockholders by the weighted-average shares of common stock outstanding during the year. A reconciliation of net income and weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share for the years ended December 31 follows:

2013

2012

2011

Net income

$

3,441

$

3,980

$

5,747

Net income attributable to noncontrolling interests

(761

)

(939

)

(1,187

)

Preferred dividends on redeemable noncontrolling interest

(22

)

—

—

Net income attributable to FCX common stockholders

$

2,658

$

3,041

$

4,560

Weighted-average shares of common stock outstanding (millions)

1,002

949

947

Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (millions)

4

a

5

a

8

a

Weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share (millions)

1,006

954

955

Diluted net income per share attributable to FCX common stockholders

$

2.64

$

3.19

$

4.78

a.

Excluded shares of common stock associated with outstanding stock options with exercise prices less than the average market price of FCX's common stock that were anti-dilutive based on the treasury stock method totaled approximately one million for the years ended December 31, 2013 and 2012, and two million for the year ended December 31, 2011.

Outstanding stock options with exercise prices greater than the average market price of FCX’s common stock during the year are excluded from the computation of diluted net income per share of common stock. Excluded stock options totaled 30 million with a weighted-average exercise price of $40.23 per option in 2013; 17 million with a weighted-average exercise price of $44.73 per option in 2012; and 4 million with a weighted-average exercise price of $53.91 per option in 2011.

Reclassifications. For comparative purposes, primarily the revision to FCX’s presentation of its business segments, certain prior year amounts have been reclassified to conform with the current year presentation.

ACQUISITIONS_Notes

ACQUISITIONS (Notes)	12 Months Ended
	Dec. 31, 2013
Acquisitions [Abstract]	'
Business Combination Disclosure [Text Block]	'
	ACQUISITIONS
	Oil and Gas. FCX acquired PXP on May 31, 2013, and MMR on June 3, 2013. These acquisitions added a portfolio of oil and gas assets to FCX's global mining business, creating a U.S.-based natural resource company. The portfolio of oil and gas assets includes oil production facilities and growth potential in the Deepwater Gulf of Mexico (GOM), oil production from the onshore Eagle Ford shale play in Texas, oil production facilities onshore and offshore California, onshore natural gas resources in the Haynesville shale play in Louisiana, natural gas production from the Madden area in central Wyoming, and a position in the emerging shallow-water Inboard Lower Tertiary/Cretaceous natural gas trend on the Shelf of the GOM and onshore in South Louisiana (previously referred to as the ultra-deep gas trend). The acquisitions have been accounted for under the acquisition method, with FCX as the acquirer. As further discussed in Note 8, FCX issued $6.5 billion of unsecured senior notes in March 2013 for net proceeds of $6.4 billion, which was used, together with borrowings under a $4.0 billion unsecured five-year bank term loan, to fund the cash portion of the merger consideration for both transactions, to repay certain indebtedness of PXP and for general corporate purposes.
	In the PXP acquisition, FCX acquired PXP for per-share consideration equivalent to 0.6531 shares of FCX common stock and $25.00 in cash. PXP stockholders had the right to elect to receive merger consideration in the form of cash or shares of FCX common stock, subject to the proration provisions in the merger agreement. Based on the final results of the merger consideration elections and as set forth in the merger agreement, FCX issued 91 million shares of its common stock and paid $3.8 billion in cash (which includes $411 million for the value of the $3 per share special dividend paid to PXP stockholders on May 31, 2013). Following is a summary of the $6.6 billion purchase price for PXP:
	Number of shares of PXP common stock acquired (millions)	132.28
	Exchange ratio of FCX common stock for each PXP share	0.6531
		86.392
	Shares of FCX common stock issued for certain PXP equity awards (millions)	4.769
	Total shares of FCX common stock issued (millions)	91.161
	Closing share price of FCX common stock at May 31, 2013	$	31.05
	FCX stock consideration	$	2,831
	Cash consideration	3,725			a
	Employee stock-based awards, primarily cash-settled stock-based awards	83
	Total purchase price	$	6,639
	a.	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.
	In the MMR acquisition, for each MMR share owned, MMR shareholders received $14.75 in cash and 1.15 units of a royalty trust, which holds a 5 percent overriding royalty interest in future production from MMR's Inboard Lower Tertiary/Cretaceous exploration prospects that existed as of December 5, 2012, the date of the merger agreement. MMR conveyed the royalty interests to the royalty trust immediately prior to the effective time of the merger, and they were "carved out" of the mineral interests that were acquired by FCX and not considered part of purchase consideration.
	Prior to June 3, 2013, FCX owned 500,000 shares of MMR's 5.75% Convertible Perpetual Preferred Stock, Series 2, which was accounted for under the cost method and recorded on FCX's balance sheet at $432 million on May 31, 2013. Through its acquisition of PXP on May 31, 2013, FCX acquired 51 million shares of MMR's common stock, which had a fair value of $848 million on that date based upon the closing market price of MMR's common stock ($16.63 per share, i.e., Level 1 measurement). As a result of FCX obtaining control of MMR on June 3, 2013, FCX remeasured its ownership interests in MMR to a fair value of $1.4 billion, resulting in a gain of $128 million that was recorded in second-quarter 2013. Fair value was calculated using the closing quoted market price of MMR's common stock on June 3, 2013, of $16.75 per share (i.e., Level 1 measurement) and a valuation model using observable inputs (i.e., Level 2 measurement) for the preferred stock. Following is a summary of the $3.1 billion purchase price for MMR:
	Number of shares of MMR common stock acquired (millions)	112.362			a
	Cash consideration of $14.75 per share	$	14.75
	Cash consideration paid by FCX	$	1,657
	Employee stock-based awards	63
	Total	1,720
	Fair value of FCX's investment in 51 million shares of MMR common stock acquired on
	May 31, 2013, through the acquisition of PXP	854
	Fair value of FCX's investment in MMR's 5.75% Convertible Perpetual Preferred Stock, Series 2	554
	Total purchase price	$	3,128
	a.	Excluded 51 million shares of MMR common stock owned by FCX through its acquisition of PXP on May 31, 2013.
	The following table summarizes the preliminary purchase price allocations for PXP and MMR as of December 31, 2013:
		PXP				MMR				Eliminations				Total
	Current assets	$	1,193			$	98			$	—			$	1,291
	Oil and gas properties - full cost method:
	Subject to amortization	11,447				756				—				12,203
	Not subject to amortization.	9,401				1,686				—				11,087
	Property, plant and equipment	261				1				—				262
	Investment in MMRa	848				—				(848		)		—
	Other assets	12				423				—				435
	Current liabilities	(906		)		(174		)		—				(1,080		)
	Debt (current and long-term)	(10,631		)		(620		)		—				(11,251		)
	Deferred income taxesb	(3,916		)		—				—				(3,916		)
	Other long-term liabilities	(799		)		(262		)		—				(1,061		)
	Redeemable noncontrolling interest	(708		)		(259		)		—				(967		)
	Total fair value, excluding goodwill	6,202				1,649				(848		)		7,003
	Goodwillc	437				1,479				—				1,916
	Total purchase price	$	6,639			$	3,128			$	(848	)		$	8,919
	a.	PXP owned 51 million shares of MMR common stock, which was eliminated in FCX's consolidated balance sheet at the acquisition date of MMR.
	b.	Deferred income taxes have been recognized based on the estimated fair value adjustments to net assets using a 38 percent tax rate, which reflected the 35 percent federal statutory rate and a 3 percent weighted-average of the applicable statutory state tax rates (net of federal benefit).
	c.	During the fourth quarter of 2013, FCX conducted a qualitative goodwill impairment assessment by examining relevant events and circumstances that could have a negative impact on FCX's goodwill, such as macroeconomic conditions, industry and market conditions, cost factors that have a negative effect on earnings and cash flows, overall financial performance, dispositions and acquisitions, and any other relevant events or circumstances. After assessing the relevant events and circumstances for the qualitative impairment assessment, FCX determined that performing a quantitative goodwill impairment test was unnecessary, and no goodwill impairment was recognized.
	In accordance with the acquisition method of accounting, the purchase price from FCX's acquisitions of both PXP and MMR has been allocated to the assets acquired, liabilities assumed and redeemable noncontrolling interest based on their estimated fair values on the respective acquisition dates. The fair value estimates were based on, but not limited to quoted market prices, where available; expected future cash flows based on estimated reserve quantities; costs to produce and develop reserves; current replacement cost for similar capacity for certain fixed assets; market rate assumptions for contractual obligations; appropriate discount rates and growth rates, and crude oil and natural gas forward prices. The excess of the total consideration over the estimated fair value of the amounts initially assigned to the identifiable assets acquired, liabilities assumed and redeemable noncontrolling interest has been recorded as goodwill. Goodwill recorded in connection with the acquisitions is not deductible for income tax purposes.
	The final valuation of assets acquired, liabilities assumed and redeemable noncontrolling interest is not complete and the net adjustments to those values may result in changes to goodwill and other carrying amounts initially assigned to the assets, liabilities and redeemable noncontrolling interest based on the preliminary fair value analysis. The principal remaining items to be valued are tax assets and liabilities, and any related valuation allowances, which will be finalized in connection with the filing of related tax returns.
	A summary of the 2013 adjustments to the initial fair values assigned to assets acquired, liabilities assumed and redeemable noncontrolling interest from the acquisitions follows:
			PXP				MMR				Total
	Increase in current assets (primarily current deferred income tax asset)		$	183			$	2			$	185
	Decreases in oil and gas properties - full cost method:
	Subject to amortization		—				(45		)		(45		)
	Not subject to amortization		(234		)		(6		)		(240		)
	Increase in other assets (deferred income tax asset)		—				24				24
	Net increase in deferred income tax liability		(45		)		—				(45		)
	Net decrease (increase) in other liabilities (primarily warrants)		77				(4		)		73
	Decrease in redeemable noncontrolling interest		41				—				41
	(Decrease) increase in goodwill		(17		)		29				12
	The fair value measurement of the oil and gas properties, asset retirement obligations included in other liabilities (refer to Note 12 for further discussion) and redeemable noncontrolling interest were based, in part, on significant inputs not observable in the market (as discussed above) and thus represents a Level 3 measurement. The fair value measurement of long-term debt, including the current portion, was based on prices obtained from a readily available pricing source and thus represents a Level 2 measurement.
	Goodwill arose on these acquisitions principally because of limited drilling activities to date and the absence of production history and material reserve data associated with the very large geologic potential of an emerging trend targeting deep-seated structures in the shallow waters of the GOM and onshore analogous to large discoveries in the Deepwater GOM and other proven basins' prospects. In addition, goodwill also resulted from the requirement to recognize deferred taxes on the difference between the fair value and the tax basis of the acquired assets.
	For the seven-month period from June 1, 2013, to December 31, 2013, FM O&G contributed revenue of $2.6 billion and operating income of $450 million to FCX's consolidated results. FCX's acquisition-related costs associated with the acquisitions of PXP and MMR totaled $74 million for the year ended December 31, 2013, which were included in selling, general and administrative expenses in the consolidated statements of income. In addition, FCX deferred debt issuance costs of $96 million in connection with the debt financings of the acquisitions (refer to Note 8 for further discussion of the debt financings), which are included in other assets in the consolidated balance sheet as of December 31, 2013.
	Redeemable Noncontrolling Interest - PXP. In 2011, PXP issued (i) 450,000 shares of Plains Offshore Operations Inc. (Plains Offshore, a consolidated subsidiary) 8% Convertible Preferred Stock (Preferred Stock) for gross proceeds of $450 million and (ii) non-detachable warrants with an exercise price of $20 per share to purchase in aggregate 9.1 million shares of Plains Offshore's common stock. In addition, Plains Offshore issued 87 million shares of Plains Offshore Class A common stock, which will be held in escrow until the conversion and cancellation of the Preferred Stock or the exercise of the warrants. Plains Offshore holds certain of FM O&G's oil and gas properties and assets located in the GOM in water depths of 500 feet or more, including the Lucius oil field and the Phobos discovery, but excluding the properties acquired by PXP in 2012 from BP Exploration & Production Inc., BP America Production Company and Shell Offshore Inc. The Preferred Stock represents a 20 percent equity interest in Plains Offshore and is entitled to a dividend of 8 percent per annum, payable quarterly, of which 2 percent may be deferred ($23 million of accumulated deferred dividends as of December 31, 2013). The preferred holders are entitled to vote on all matters on which Plains Offshore common stockholders are entitled to vote. The shares of Preferred Stock also fully participate, on an as-converted basis at four times, in cash dividends distributed to any class of common stockholders of Plains Offshore. Plains Offshore has not distributed any dividends to its common stockholders.
The holders of the Preferred Stock (preferred holders) have the right, at any time at their option, to convert any or all of such holder's shares of Preferred Stock and exercise any of the associated non-detachable warrants into shares of Class A common stock of Plains Offshore, at an initial conversion/exercise price of $20 per share; the conversion price is subject to adjustment as a result of certain events. Furthermore, Plains Offshore has the right to convert all or a portion of the outstanding shares of Preferred Stock if certain events occur more than 180 days after an initial public offering or a qualified public offering of Plains Offshore. FM O&G also has a right to purchase shares of Plains Offshore preferred stock, common stock and warrants under certain circumstances in order to permit the consolidation of Plains Offshore for federal income tax purposes. Additionally, at any time on or after November 17, 2016, the fifth anniversary of the closing date, FM O&G may exercise a call right to purchase all, but not less than all, of the outstanding shares of Preferred Stock and associated non-detachable warrants for cash, at a price equal to the liquidation preference described below.
At any time after November 17, 2015, the fourth anniversary of the closing date, a majority of the preferred holders may cause Plains Offshore to use its commercially reasonable efforts to consummate an exit event. An exit event, as defined in the stockholders agreement, means, at the sole option of Plains Offshore (i) the purchase by FM O&G or the redemption by Plains Offshore of all the preferred stock, warrants and common stock held by the preferred holders for the aggregate fair value thereof; (ii) a sale of Plains Offshore or a sale of all or substantially all of its assets, in each case in an arms' length transaction with a third party, at the highest price available after reasonable marketing efforts by Plains Offshore; or (iii) a qualified initial public offering. In the event that Plains Offshore fails to consummate an exit event prior to the applicable exit event deadline, the conversion price of the Preferred Stock and the exercise price of the warrants will immediately and automatically be adjusted such that all issued and outstanding shares of Preferred Stock on an as-converted basis taken together with shares of Plains Offshore common stock issuable upon exercise of the warrants, in the aggregate, will constitute 49 percent of the common equity securities of Plains Offshore on a fully diluted basis. In addition, FM O&G would be required to purchase $300 million of junior preferred stock in Plains Offshore.
In the event of liquidation of Plains Offshore, each preferred holder is entitled to receive the liquidation preference before any payment or distribution is made on any Plains Offshore junior preferred stock or common stock. A liquidation event includes any of the following events: (i) the liquidation, dissolution or winding up of Plains Offshore, whether voluntary or involuntary, (ii) a sale, consolidation or merger of Plains Offshore in which the stockholders immediately prior to such event do not own at least a majority of the outstanding shares of the surviving entity, or (iii) a sale or other disposition of all or substantially all of Plains Offshore's assets to a person other than FM O&G or its affiliates. The liquidation preference, as defined in the stockholders agreement, is equal to (i) the greater of (a) 1.25 times the initial offering price or (b) the sum of (1) the fair market value of the shares of common stock issuable upon conversion of the Preferred Stock and (2) the applicable tax adjustment amount, plus (ii) any accrued and accumulated dividends.
The non-detachable warrants may be exercised on the earlier of (i) November 17, 2019, the eighth anniversary of the original issue date or (ii) a termination event. A termination event is defined as the occurrence of any of (a) the conversion of the Preferred Stock, (b) the redemption of the Preferred Stock, (c) the repurchase by FM O&G or any of its affiliates of the Preferred Stock or (d) a liquidation event of Plains Offshore, described above. The non-detachable warrants are considered to be embedded derivative instruments for accounting purposes and have been assessed as not being clearly and closely related to the Preferred Stock. Therefore, the warrants are classified as a long-term liability in the accompanying consolidated balance sheet and are adjusted to fair value each reporting period with adjustments recorded in other income (expense). The fair value measurement of the warrants is based on significant inputs not observable in the market (refer to Note 15 for discussion of valuation technique) and thus represents a Level 3 measurement.
The Preferred Stock of Plains Offshore is classified as temporary equity because of its redemption features and is therefore reported outside of permanent equity in FCX's consolidated balance sheet. The redeemable noncontrolling interest totaled $716 million as of December 31, 2013. Remeasurement of the redeemable noncontrolling interest represents its initial carrying amount adjusted for any noncontrolling interest's share of net income (loss) or changes to the redemption value. Additionally, the carrying amount will be further increased by amounts representing dividends not currently declared or paid, but which are payable under the redemption features described above. Future mark-to-market adjustments to the redemption value, subject to a minimum balance of the original recorded value ($708 million) on May 31, 2013, shall be reflected in retained earnings and earnings per share. Changes in the redemption value are accreted over the period from the date FCX acquired PXP to the earliest redemption date.
Redeemable Noncontrolling Interest - MMR. The enhanced "make-whole" conversion rates triggered by FCX's acquisition of MMR expired on July 9, 2013, for MMR's 8% Convertible Perpetual Preferred Stock and 5.75% Convertible Perpetual Preferred Stock, Series 1. All of the $259 million of preferred shares converted during 2013 primarily at the make-whole conversion rates for which holders received cash of $228 million and 17.7 million royalty trust units with a fair value of $31 million at the acquisition date.
Unaudited Pro Forma Consolidated Financial Information. The following unaudited pro forma financial information has been prepared to reflect the acquisitions of PXP and MMR. The unaudited pro forma financial information combines the historical statements of income of FCX, PXP and MMR (including the pro forma effects of PXP's GOM acquisition that was completed on November 30, 2012) for the years ended December 31, 2013 and 2012, giving effect to the mergers as if they had occurred on January 1, 2012. The historical consolidated financial information has been adjusted to reflect factually supportable items that are directly attributable to the acquisitions.
	Years Ended December 31,
	2013				2012
Revenues	$	23,075			$	22,713
Operating income	6,267				6,815
Income from continuing operations	3,626				4,277
Net income attributable to FCX common stockholders	2,825				3,301
Net income per share attributable to FCX common stockholders:
Basic	$	2.71			$	3.17
Diluted	2.7				3.16
The above unaudited pro forma consolidated information has been prepared for illustrative purposes only and is not intended to be indicative of the results of operations that actually would have occurred, or the results of operations expected in future periods, had the events reflected herein occurred on the date indicated. The most significant pro forma adjustments to income from continuing operations for the year ended December 31, 2013, were to exclude $519 million of acquisition-related costs, the net tax benefit of $199 million of acquisition-related adjustments and the $128 million gain on the investment in MMR and to include them in the year ended December 31, 2012. Additionally, for the year ended December 31, 2013, the pro forma consolidated information excluded a $77 million gain on the sale of oil and gas properties reflected in MMR's results of operations prior to the acquisition because of the application of the full cost accounting method.
Cobalt Chemical Refinery Business. On March 29, 2013, FCX, through a newly formed consolidated joint venture, completed the acquisition of a cobalt chemical refinery in Kokkola, Finland, and the related sales and marketing business. The acquisition provides direct end-market access for the cobalt hydroxide production at Tenke. The joint venture operates under the name Freeport Cobalt, and FCX is the operator with an effective 56 percent ownership interest. The remaining effective ownership interest is held by FCX's partners in TFM, including 24 percent by Lundin Mining Corporation (Lundin) and 20 percent by La Générale des Carrières et des Mines (Gécamines). Consideration paid was $382 million, which included $34 million for cash acquired, and was funded 70 percent by FCX and 30 percent by Lundin. Under the terms of the acquisition agreement, there is also the potential for additional consideration of up to $110 million over a period of three years, contingent upon the achievement of revenue-based performance targets. As of December 31, 2013, no amount was recorded for this contingency because these targets are not expected to be achieved.

OWNERSHIP_IN_SUBSIDIARIES_AND_

OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES	12 Months Ended
	Dec. 31, 2013
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]	'
Ownership In Subsidiaries And Joint Ventures	'
	OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES
	Ownership in Subsidiaries.  FMC is a fully integrated producer of copper and molybdenum, with mines in North America, South America and the Tenke minerals district in the DRC. At December 31, 2013, FMC’s operating mines in North America were Morenci, Bagdad, Safford, Sierrita and Miami located in Arizona; Tyrone and Chino located in New Mexico; and Henderson and Climax located in Colorado. FCX has an 85 percent interest in Morenci (refer to “Joint Ventures – Sumitomo”) and owns 100 percent of the other North America mines. At December 31, 2013, operating mines in South America were Cerro Verde (53.56 percent owned) located in Peru, and El Abra (51 percent owned), Candelaria (80 percent owned) and Ojos del Salado (80 percent owned) located in Chile. At December 31, 2013, FMC owned an effective 56 percent interest in the Tenke minerals district in the DRC (refer to Note 13 for discussion of the change in ownership interest in 2012). At December 31, 2013, FMC’s net assets totaled $20.3 billion and its accumulated deficit totaled $9.0 billion. FCX had no loans outstanding to FMC at December 31, 2013.
	FCX’s direct ownership in PT-FI totals 81.28 percent. PT Indocopper Investama, an Indonesian company, owns 9.36 percent of PT-FI, and FCX owns 100 percent of PT Indocopper Investama. Refer to "Joint Ventures - Rio Tinto" for discussion of the unincorporated joint ventures. At December 31, 2013, PT-FI's net assets totaled $4.9 billion and its retained earnings totaled $4.7 billion. As of December 31, 2013, FCX had no loans outstanding to PT-FI.
	FCX owns 100 percent of the outstanding Atlantic Copper common stock. At December 31, 2013, Atlantic Copper’s net liabilities totaled $148 million and its accumulated deficit totaled $543 million. FCX had $642 million in intercompany loans outstanding to Atlantic Copper at December 31, 2013.
	FCX owns 100 percent of FM O&G, which has a portfolio of oil and gas assets. At December 31, 2013, FM O&G’s net assets totaled $9.8 billion and its retained earnings totaled $265 million. FCX had $3.4 billion in intercompany loans to FM O&G at December 31, 2013.
	Joint Ventures.  FCX has the following unincorporated joint ventures with third parties.
	Rio Tinto. FCX and Rio Tinto have established certain unincorporated joint ventures. Under the joint venture arrangements, Rio Tinto has a 40 percent interest in PT-FI’s Contract of Work and the option to participate in 40 percent of any other future exploration projects in Papua, Indonesia.
	Pursuant to the joint venture agreement, Rio Tinto has a 40 percent interest in certain assets and future production exceeding specified annual amounts of copper, gold and silver through 2021 in Block A of PT-FI’s Contract of Work, and, after 2021, a 40 percent interest in all production from Block A. All of PT-FI’s proven and probable reserves and its mining operations are located in the Block A area. Operating, nonexpansion capital and administrative costs are shared proportionately between PT-FI and Rio Tinto based on the ratio of (i) the incremental revenues from production from PT-FI’s expansion completed in 1998 to (ii) total revenues from production from Block A, including production from PT-FI’s previously existing reserves. PT-FI will continue to receive 100 percent of the cash flow from specified annual amounts of copper, gold and silver through 2021 calculated by reference to its proven and probable reserves as of December 31, 1994, and 60 percent of all remaining cash flow. The agreement provides for adjustments to the specified annual amounts of copper, gold and silver attributable 100 percent to PT-FI upon the occurrence of certain events that cause an interruption in production to occur, including events such as the business interruption and property damage relating to the 2011 incidents affecting PT-FI's concentrate pipelines. As a result of these incidents, the 2011 specified amounts, before smelter recoveries, attributable 100 percent to PT-FI were reduced by 228 million pounds for copper and 224 thousand ounces for gold, which will be offset by identical increases in future periods. The payable to Rio Tinto for its share of joint venture cash flows was $33 million at December 31, 2013, and $4 million at December 31, 2012.
	Sumitomo. FCX owns an 85 percent undivided interest in Morenci via an unincorporated joint venture. The remaining 15 percent is owned by Sumitomo, a jointly owned subsidiary of Sumitomo Metal Mining Co., Ltd. and Sumitomo Corporation. Each partner takes in kind its share of Morenci’s production. FMC purchased 76 million pounds of Morenci’s copper cathode from Sumitomo for $253 million during 2013. FCX had a receivable from Sumitomo of $12 million at December 31, 2013, and $49 million at December 31, 2012.

INVENTORIES_INCLUDING_LONGTERM

INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES	12 Months Ended
	Dec. 31, 2013
Inventories, Including Long Term Mill and Leach Stockpiles [Abstract]	'
Inventories, Including Long-Term Mill And Leach Stockpiles	'
	INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES
	The components of inventories, excluding mill and leach stockpiles, follow:
		December 31,
		2013			2012
	Current inventories:
	Raw materials (primarily concentrates)	$	238		$	237
	Work-in-processa	199			252
	Finished goodsb	1,146			911
	Total product inventories	$	1,583		$	1,400
	Mill stockpiles	$	91		$	104
	Leach stockpiles	1,614		c	1,568
	Total current mill and leach stockpiles	$	1,705		$	1,672
	Total materials and supplies, netd	$	1,730		$	1,504
	Long-term inventories:
	Mill stockpiles	$	698		$	615
	Leach stockpiles	1,688			1,340
	Total long-term mill and leach stockpilese	$	2,386		$	1,955
	a.	FCX's mining operations also have work-in-process inventories that are included in mill and leach stockpiles.
	b.	Primarily included molybdenum concentrates; copper concentrates, anodes, cathodes and rod; and various cobalt products.
	c.	Amount is net of a $76 million charge associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles.
	d.	Materials and supplies inventory was net of obsolescence reserves totaling $24 million at December 31, 2013, and $27 million at December 31, 2012.
	e.	Estimated metals in stockpiles not expected to be recovered within the next 12 months.

PROPERTY_PLANT_EQUIPMENT_AND_M

PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment, Net [Abstract]	'
Property, Plant, Equipment and Mining Development Costs, Net	'
	PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET
	The components of net property, plant, equipment and mining development costs follow:
		December 31,
		2013			2012
	Proven and probable mineral reserves	$	4,651		$	4,630
	VBPP	1,044			1,067
	Mining development and other	4,335			3,821
	Buildings and infrastructure	4,334			3,811
	Machinery and equipment	10,379			9,472
	Mobile equipment	3,903			3,447
	Construction in progress	5,603			3,402
	Property, plant, equipment and mining development costs	34,249			29,650
	Accumulated depreciation, depletion and amortization	(10,207		)	(8,651		)
	Property, plant, equipment and mining development costs, net	$	24,042		$	20,999
	FCX recorded $2.2 billion for VBPP in connection with the FMC acquisition in 2007 and transferred $22 million to proven and probable mineral reserves during 2013, none during 2012 and $762 million prior to 2012. Cumulative impairments of VBPP total $482 million, which were primarily recorded in 2008.
	Capitalized interest primarily related to FCX's mining operations' capital projects totaled $105 million in 2013, $81 million in 2012 and $109 million in 2011.

OTHER_ASSETS

OTHER ASSETS	12 Months Ended
	Dec. 31, 2013
Other Assets [Abstract]	'
Other Assets Disclosure [Text Block]	'
	OTHER ASSETS
	The components of other assets follow:
		December 31,
		2013		2012
	Legally restricted fundsa	$	392	$	163
	Intangible assetsb	380		334
	Disputed tax assessmentsc	327		177
	Investments:
	MMRd	—		446
	PT Smeltinge	71		89
	Available-for-sale securities	44		46
	Other	63		51
	Long-term receivable for income tax refunds	77		317
	Loan to a DRC public electric utility	152		149
	Debt issue costs	107		26
	Loan to Gécamines (related party)	34		32
	Deferred tax assets	2		220
	Other	149		139
	Total other assets	$	1,798	$	2,189
	a.	Included $210 million (time deposit that secures a bank guarantee) associated with the Cerro Verde royalty dispute and $158 million for AROs related to properties in New Mexico at December 31, 2013, and $161 million for AROs related to properties in New Mexico at December 31, 2012 (refer to Note 12 for further discussion).
	b.	Intangible assets were net of accumulated amortization totaling $57 million at December 31, 2013, and $71 million at December 31, 2012.
	c.	Included Indonesian disputed tax assessments of $255 million at December 31, 2013, and $148 million at December 31, 2012 (refer to Note 12 for further discussion).
	d.	In December 2010, FCX purchased 500,000 shares of MMR’s 5.75% Convertible Perpetual Preferred Stock for an aggregate purchase price of $500 million, which was recorded at cost and subsequently reduced by dividends. On June 3, 2013, FCX acquired MMR (refer to Note 2 for discussion of the acquisition of MMR).
	e.	FCX's 25 percent ownership in PT Smelting (smelter and refinery in Gresik, Indonesia) is recorded using the equity method. Amounts were reduced by unrecognized profits on sales from PT-FI to PT Smelting totaling $58 million at December 31, 2013, and $39 million at December 31, 2012.

ACCOUNTS_PAYABLE_AND_ACCRUED_L

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	12 Months Ended
	Dec. 31, 2013
Accounts Payable and Accrued Liabilities, Current [Abstract]	'
Accounts Payable and Accrued Liabilities	'
	ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
	Additional information regarding accounts payable and accrued liabilities follows:
		December 31,
		2013		2012
	Accounts payable	$	2,144	$	1,568
	Salaries, wages and other compensation	352		287
	Commodity derivative contracts	205		11
	Accrued interesta	210		35
	Oil and gas royalty and revenue payable	169		—
	Pension, postretirement, postemployment and other employee benefitsb	161		140
	Other accrued taxes	142		92
	Deferred revenue	115		94
	Rio Tinto's share of joint venture cash flows	33		4
	Other	169		93
	Total accounts payable and accrued liabilities	$	3,700	$	2,324
	a.	Third-party interest paid, net of capitalized interest, was $397 million in 2013, $111 million in 2012 and $225 million in 2011.
	b.	Refer to Note 9 for long-term portion.

DEBT

DEBT	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	DEBT
	As of December 31, 2013, debt included $653 million of fair value adjustments related to the debt assumed in the acquisition of PXP. The components of debt follow:
		December 31,
		2013			2012
	Revolving credit facility	$	—		$	—
	Lines of credit	—			—
	Bank term loan	4,000			—
	Senior notes and debentures:
	Issued by FCX:
	1.40% Senior Notes due 2015	500			500
	2.15% Senior Notes due 2017	500			500
	2.375% Senior Notes due 2018	1,500			—
	3.100% Senior Notes due 2020	999			—
	3.55% Senior Notes due 2022	1,996			1,995
	3.875% Senior Notes due 2023	1,999			—
	5.450% Senior Notes due 2043	1,991			—
	Issued by FM O&G:
	6.125% Senior Notes due 2019	817			—
	8.625% Senior Notes due 2019	447			—
	7.625% Senior Notes due 2020	336			—
	6½% Senior Notes due 2020	1,647			—
	6.625% Senior Notes due 2021	659			—
	6.75% Senior Notes due 2022	1,111			—
	6⅞% Senior Notes due 2023	1,686			—
	Issued by FMC:
	71/8% Debentures due 2027	115			115
	9½% Senior Notes due 2031	130			130
	61/8% Senior Notes due 2034	115			115
	Other (including equipment capital leases and short-term borrowings)	158			172
	Total debt	20,706			3,527
	Less current portion of debt	(312		)	(2		)
	Long-term debt	$	20,394		$	3,525
	Revolving Credit Facility.  In 2013, FCX and PT-FI entered into a new senior unsecured $3.0 billion revolving credit facility, which replaced FCX's existing revolving credit facility (scheduled to mature on March 30, 2016) upon completion of the acquisition of PXP on May 31, 2013. In connection with the PXP acquisition, Freeport-McMoRan Oil & Gas LLC (FM O&G LLC, a wholly owned subsidiary of FM O&G and the successor entity of PXP) joined the revolving credit facility as a borrower. The new revolving credit facility is available until May 31, 2018, with $500 million available to PT-FI. At December 31, 2013, there were no borrowings and $46 million of letters of credit issued under the revolving credit facility, resulting in availability of approximately $3.0 billion, of which $1.5 billion could be used for additional letters of credit.
	Interest on the new revolving credit facility (currently London Interbank Offered Rate (LIBOR) plus 1.50 percent or the alternate base rate (ABR) plus 0.50 percent) is determined by reference to FCX's credit ratings.
	Lines of Credit. During third-quarter 2013, FCX entered into uncommitted lines of credit totaling $450 million with three financial institutions. These unsecured lines of credit allow FCX to borrow at a spread over LIBOR or the respective financial institution's cost of funds with terms and pricing that are more favorable than FCX's revolving credit facility. As of December 31, 2013, there were no borrowings drawn on these lines of credit.
	Bank Term Loan. In February 2013, FCX entered into an agreement for a $4.0 billion unsecured term loan in connection with the acquisitions of PXP and MMR. Upon closing the PXP acquisition, FCX borrowed $4.0 billion under the Term Loan, and FM O&G LLC joined the Term Loan as a borrower. The Term Loan amortizes in equal quarterly installments during the second, third and fourth years of the loan in annual amounts equal to 10 percent, 15 percent and 20 percent, respectively, of the original aggregate principal amount, and the remainder will mature on May 31, 2018. At FCX's option, the Term Loan bears interest at either an adjusted LIBOR or an ABR (as defined under the Term Loan agreement) plus a spread determined by reference to FCX's credit ratings (currently LIBOR plus 1.50 percent or ABR plus 0.50 percent). The effective interest rate on the Term Loan was 1.67 percent at December 31, 2013.
	Senior Notes issued by FCX. In March 2013, in connection with the financing of FCX's acquisitions of PXP and MMR, FCX issued $6.5 billion of unsecured senior notes in four tranches. FCX sold $1.5 billion of 2.375% Senior Notes due March 2018, $1.0 billion of 3.100% Senior Notes due March 2020, $2.0 billion of 3.875% Senior Notes due March 2023 and $2.0 billion of 5.450% Senior Notes due March 2043 for total net proceeds of $6.4 billion. The 2.375% Senior Notes and the 3.100% Senior Notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price. The 3.875% Senior Notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price prior to December 15, 2022, and thereafter at 100 percent of principal. The 5.450% Senior Notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price prior to September 15, 2042, and thereafter at 100 percent of principal.
	In February 2012, FCX sold $500 million of 1.40% Senior Notes due 2015, $500 million of 2.15% Senior Notes due 2017 and $2.0 billion of 3.55% Senior Notes due 2022 for total net proceeds of $2.97 billion. The 1.40% Senior Notes and the 2.15% Senior Notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price prior to the redemption date. The 3.55% Senior Notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price prior to December 1, 2021, and thereafter at 100 percent of principal.
	These senior notes rank equally with FCX's other existing and future unsecured and unsubordinated indebtedness.
	Senior Notes issued by FM O&G. In May 2013, in connection with the acquisition of PXP, FCX assumed unsecured senior notes with a stated value of $6.4 billion, which was increased by $716 million to reflect the acquisition-date fair market value of these senior notes. The fair value adjustments are being amortized over the term of the senior notes and recorded as a reduction of interest expense. These senior notes are redeemable in whole or in part, at the option of FM O&G LLC, at make-whole redemption prices prior to the dates stated below, and beginning on the dates stated below at specified redemption prices. In addition, up to 35 percent of the principal amount of certain of these senior notes may be redeemed at specified redemption prices with all or a portion of the proceeds of an equity issuance by FM O&G LLC. Upon completion of the acquisition of PXP, FCX guaranteed these senior notes resulting in an investment grade rating for these senior notes.
	Debt Instrument		Date
	6.125% Senior Notes due 2019		June 15, 2016
	8.625% Senior Notes due 2019		October 15, 2014
	7.625% Senior Notes due 2020		April 1, 2015
	6½% Senior Notes due 2020		November 15, 2015
	6.625%% Senior Notes due 2021		May 1, 2016
	6.75% Senior Notes due 2022		February 1, 2017
	6⅞% Senior Notes due 2023		February 15, 2018
	Additionally, in connection with the acquisition of MMR, FCX assumed MMR's 11.875% Senior Notes due 2014, 4% Convertible Senior Notes due 2017 and 5¼% Convertible Senior Notes due 2013 with a total stated value of $558 million, which was increased by $62 million to reflect the acquisition-date fair market value of these obligations. During 2013, all of the 11.875% Senior Notes due 2014 were redeemed, and holders of 4% Convertible Senior Notes due 2017 and 5¼% Convertible Senior Notes due 2013 converted their notes into merger consideration totaling $306 million, including cash payments of $270 million and 21.0 million royalty trust units with a fair value of $36 million at the acquisition date. At December 31, 2013, there were no outstanding amounts in connection with MMR’s senior notes.
	At December 31, 2013, the outstanding principal amount of the FM O&G senior notes totaled $6.1 billion, and fair value adjustments totaled $653 million.
	Debentures and Senior Notes issued by FMC. In March 2007, in connection with the acquisition of FMC, FCX assumed the 7⅛% Debentures due November 2027, the 9½% Senior Notes due 2031 and the 6⅛% Senior Notes due March 2034 with a total stated value of $462 million. These debentures and senior notes are redeemable in whole or in part, at the option of FCX, at a make-whole redemption price. The carrying value of these senior notes and debentures were increased by a net $32 million to reflect the acquisition-date fair market value of these obligations. The net increase in value is being amortized over the term of these debentures and senior notes and recorded as a net reduction to interest expense. At December 31, 2013, the outstanding principal amount of these senior notes and debentures was $346 million.
	Early Extinguishment of Debt. In 2013, FCX completed the following transactions that resulted in a net loss on early extinguishment of debt of $35 million: (i) the termination of its $9.5 billion acquisition bridge loan facility, which was entered into in December 2012 to provide interim financing for the acquisitions of PXP and MMR but was replaced with other financing, that resulted in a loss of $45 million; (ii) the repayment of the $3.9 billion outstanding under PXP’s amended credit facility and the redemption of all of PXP’s 7⅝% Senior Notes due 2018 for $415 million, which did not result in a gain or loss; partially offset by (iii) the redemption of MMR’s remaining outstanding 11.875% Senior Notes due 2014 for $299 million, which resulted in a gain of $10 million.
	In 2012, FCX redeemed the remaining $3.0 billion of its outstanding 8.375% Senior Notes due 2017 for which holders received 104.553 percent of the principal amount together with the accrued and unpaid interest. As a result of this redemption, FCX recorded a loss on early extinguishment of debt of $168 million during 2012.
	In 2011, FCX redeemed all its remaining $1.1 billion of outstanding 8.25% Senior Notes for which holders received 104.125 percent of the principal amount together with accrued and unpaid interest; purchased in an open-market transaction $35 million of the 9½% Senior Notes due 2031 for $49 million; and entered into a senior unsecured revolving credit facility that replaced an existing revolving credit facility. As a result of these transactions, FCX recognized losses on early extinguishment of debt totaling $68 million during 2011.
	Guarantees. In connection with the acquisition of PXP, FCX guaranteed the PXP senior notes, and the guarantees by certain PXP subsidiaries were released. Refer to Note 17 for a discussion of FCX’s senior notes guaranteed by FM O&G LLC.
	Restrictive Covenants. FCX's term loan and revolving credit facility contain customary affirmative covenants and representations, and also contain a number of negative covenants that, among other things, restrict, subject to certain exceptions, the ability of FCX’s subsidiaries that are not borrowers or guarantors to incur additional indebtedness (including guarantee obligations) and FCX’s ability or the ability of FCX’s subsidiaries to: create liens on assets; enter into sale and leaseback transactions; engage in mergers, liquidations and dissolutions; and sell all or substantially all of the assets of FCX and its subsidiaries, taken as a whole. FCX's term loan and revolving credit facility also contain financial ratios governing maximum total leverage and minimum interest coverage. FCX’s senior notes contain limitations on liens that are generally typical for investment grade companies. At December 31, 2013, FCX was in compliance with all of its covenants.
	Maturities.  Maturities of debt instruments based on the amounts and terms outstanding at December 31, 2013, total $312 million in 2014, $1.1 billion in 2015, $751 million in 2016, $700 million in 2017, $3.7 billion in 2018 and $13.5 billion thereafter.

OTHER_LIABILITIES_INCLUDING_EM

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS	12 Months Ended
	Dec. 31, 2013
Other Liabilities, Including Employee Benefits [Abstract]	'
Other Liabilities, Including Employee benefits	'
	OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS
	Information regarding other liabilities follows:
		December 31,
		2013			2012
	Pension, postretirement, postemployment and other employment benefitsa	$	1,225		$	1,340
	Commodity derivative contracts	115			—
	Reserve for uncertain tax benefits	87			107
	Other	263			197
	Total other liabilities	$	1,690		$	1,644
	a.	Refer to Note 7 for current portion.
	Pension Plans.  Following is a discussion of FCX’s pension plans.
	FMC Plans. FMC has trusteed, non-contributory pension plans covering substantially all of its U.S. employees and some employees of its international subsidiaries hired before 2007. The applicable FMC plan design determines the manner in which benefits are calculated for any particular group of employees. Benefits are calculated based on final average monthly compensation and years of service or based on a fixed amount for each year of service. Participants in the FMC plans generally vest in their accrued benefits after five years of service. Non-bargained FMC employees hired after December 31, 2006, are not eligible to participate in the FMC U.S. pension plan.
	FCX’s funding policy for these plans provides that contributions to pension trusts shall be at least equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended, for U.S. plans; or, in the case of international plans, the minimum legal requirements that may be applicable in the various countries. Additional contributions also may be made from time to time.
	FCX’s policy for determining asset-mix targets for the Freeport-McMoRan Corporation Defined Benefit Master Trust (Master Trust) includes the periodic development of asset and liability studies to determine expected long-term rates of return and expected risk for various investment portfolios. FCX’s retirement plan administration and investment committee considers these studies in the formal establishment of asset-mix targets. FCX’s investment objective emphasizes the need to maintain a well-diversified investment program through both the allocation of the Master Trust assets among asset classes and the selection of investment managers whose various styles are fundamentally complementary to one another and serve to achieve satisfactory rates of return. Diversification, by asset class and by investment manager, is FCX’s principal means of reducing volatility and exercising prudent investment judgment. FCX’s present target asset allocation approximates 57 percent equity investments (primarily global equities), 33 percent fixed income (primarily long-term treasury STRIPS or "separate trading or registered interest and principal securities;" long-term U.S. treasury/agency bonds; international fixed income securities; treasury inflation-protection securities; long-term high-credit quality corporate bonds; high-yield and emerging markets fixed income securities; and fixed income debt securities) and 10 percent alternative investments (private real estate, real estate investment trusts and private equity).
	The expected rate of return on plan assets is evaluated at least annually, taking into consideration asset allocation, historical returns on the types of assets held in the Master Trust and the current economic environment. Based on these factors, FCX expects the pension assets will earn an average of 7.5 percent per annum beginning January 1, 2014. The 7.5 percent estimation was based on a passive return on a compound basis of 7.0 percent and a premium for active management of 0.5 percent reflecting the target asset allocation and current investment array.
	For estimation purposes, FCX assumes the long-term asset mix for these plans generally will be consistent with the current mix. Changes in the asset mix could impact the amount of recorded pension income or expense, the funded status of the plans and the need for future cash contributions. A lower-than-expected return on assets also would decrease plan assets and increase the amount of recorded pension expense in future years. When calculating the expected return on plan assets, FCX uses the market value of assets.
	Among the assumptions used to estimate the benefit obligation is a discount rate used to calculate the present value of expected future benefit payments for service to date. The discount rate assumption for FCX’s U.S. plans is designed to reflect yields on high-quality, fixed-income investments for a given duration. The determination of the discount rate for these plans is based on expected future benefit payments for service to date together with the Mercer Pension Discount Curve - Above Mean Yield. The Mercer Pension Discount Curve - Above Mean Yield is constructed from the bonds in the Mercer Pension Discount Curve that have a yield higher than the regression mean yield curve. The Mercer Pension Discount Curve consists of spot (i.e., zero coupon) interest rates at one-half year increments for each of the next 30 years and is developed based on pricing and yield information for high-quality corporate bonds. Changes in the discount rate are reflected in FCX’s benefit obligation and, therefore, in future pension costs.
	Other FCX Plans. In February 2004, FCX established an unfunded Supplemental Executive Retirement Plan (SERP) for its two most senior executive officers. The SERP provides for retirement benefits payable in the form of a joint and survivor annuity or an equivalent lump sum. The annuity will equal a percentage of the executive’s highest average compensation for any consecutive three-year period during the five years immediately preceding 25 years of credited service. The SERP benefit will be reduced by the value of all benefits paid or due under any defined benefit or defined contribution plan sponsored by FM Services Company, FCX’s wholly owned subsidiary, FCX or its predecessor, but not including accounts funded exclusively by deductions from participant’s pay.
	PT-FI Plan. PT-FI has a defined benefit pension plan denominated in Indonesian rupiah covering substantially all of its Indonesian national employees. PT-FI funds the plan and invests the assets in accordance with Indonesian pension guidelines. The pension obligation was valued at an exchange rate of 12,128 rupiah to one U.S. dollar on December 31, 2013, and 9,622 rupiah to one U.S. dollar on December 31, 2012. Indonesian labor laws enacted in 2003 require that companies provide a minimum level of benefits to employees upon employment termination based on the reason for termination and the employee’s years of service. PT-FI’s pension benefit disclosures include benefits related to this law. PT-FI’s expected rate of return on plan assets is evaluated at least annually, taking into consideration its long-range estimated return for the plan based on the asset mix. Based on these factors, PT-FI expects its pension assets will earn an average of 7.75 percent per annum beginning January 1, 2014.
	Plan Information. FCX uses a measurement date of December 31 for its plans. Information for those plans where the accumulated benefit obligations exceed the fair value of plan assets follows:
		December 31,
		2013			2012
	Projected benefit obligation	$	2,180		$	2,247
	Accumulated benefit obligation	1,933			2,031
	Fair value of plan assets	1,490			1,443
	Information on the FCX (including FMC’s plans and FCX’s SERP plans) and PT-FI plans as of December 31 follows:
		FCX						PT-FI
		2013			2012			2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning
	of year	$	1,954		$	1,791		$	240		$	206
	Service cost	30			27			20			17
	Interest cost	77			79			14			14
	Actuarial (gains) losses	(103		)	142			13			25
	Plan amendment	—			—			33			—
	Foreign exchange losses (gains)	1			1			(53		)	(13		)
	Benefits paid	(88		)	(86		)	(8		)	(9		)
	Benefit obligation at end of year	1,871			1,954			259			240
	Change in plan assets:
	Fair value of plan assets at
	beginning of year	1,300			1,141			130			107
	Actual return on plan assets	112			140			(3		)	12
	Employer contributionsa	26			105			35			26
	Foreign exchange losses	—			—			(30		)	(6		)
	Benefits paid	(88		)	(86		)	(8		)	(9		)
	Fair value of plan assets at end
	of year	1,350			1,300			124			130
	Funded status	$	(521	)	$	(654	)	$	(135	)	$	(110	)
	Accumulated benefit obligation	$	1,742		$	1,842		$	141		$	136
	Weighted-average assumptions
	used to determine benefit obligations:
	Discount rate	5		%	4.1		%	9		%	6.25		%
	Rate of compensation increaseb	3.75		%	3.75		%	10		%	8		%
	Balance sheet classification of
	funded status:
	Other assets	$	8		$	7		$	—		$	—
	Accounts payable and
	accrued liabilities	(4		)	(4		)	—			—
	Other liabilities	(525		)	(657		)	(135		)	(110		)
	Total	$	(521	)	$	(654	)	$	(135	)	$	(110	)
	a.	Employer contributions for 2014 are expected to approximate $5 million for the FCX plans and $22 million for the PT-FI plan (based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar).
	b.	The rate of compensation increase shown for the PT-FI plan in 2013 related to non-staff employees (staff employees was 8 percent).
	The weighted-average assumptions used to determine net periodic benefit cost and the components of net periodic benefit cost for FCX’s pension plans for the years ended December 31 follow:
	2013			2012			2011
Weighted-average assumptions:a
Discount rate	4.1		%	4.6		%	5.4		%
Expected return on plan assets	7.5		%	7.5		%	8		%
Rate of compensation increase	3.75		%	3.75		%	3.75		%
Service cost	$	30		$	27		$	24
Interest cost	77			79			83
Expected return on plan assets	(95		)	(86		)	(86		)
Amortization of prior service cost	—			(1		)	(1		)
Amortization of net actuarial losses	38			33			19
Net periodic benefit cost	$	50		$	52		$	39
a.	The assumptions shown relate only to the FMC plans.
The weighted-average assumptions used to determine net periodic benefit cost and the components of net periodic benefit cost for PT-FI’s pension plan for the years ended December 31 follow:
	2013			2012			2011
Weighted-average assumptions:
Discount rate	6.25		%	7		%	8.5		%
Expected return on plan assets	7.5		%	9.25		%	9.25		%
Rate of compensation increase	8		%	8		%	8		%
Service cost	$	20		$	17		$	13
Interest cost	14			14			11
Expected return on plan assets	(10		)	(9		)	(9		)
Amortization of prior service cost	—			1			1
Amortization of net actuarial loss	8			7			3
Net periodic benefit cost	$	32		$	30		$	19
Included in accumulated other comprehensive loss are the following amounts that have not been recognized in net periodic pension cost as of December 31:
	2013						2012
	Before Taxes			After Taxes and Noncontrolling Interests			Before Taxes			After Taxes and Noncontrolling Interests
Prior service costs (credits)	$	32		$	17		$	(2	)	$	(1	)
Net actuarial loss	542			326			705			429
	$	574		$	343		$	703		$	428
Actuarial losses in excess of 10 percent of the greater of the projected benefit obligation or market-related value of plan assets are amortized over the expected average remaining future service period of the current active participants. The amount expected to be recognized in 2014 net periodic pension cost for actuarial losses is $25 million ($15 million net of tax and noncontrolling interests) and $3 million ($2 million net of tax and noncontrolling interests) for prior service costs.
FCX does not expect to have any plan assets returned to it in 2014. Plan assets are classified within a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1), then to significant observable inputs (Level 2) and the lowest priority to significant unobservable inputs (Level 3). For further discussion of the different levels of the fair value hierarchy, refer to Note 15.
A summary of the fair value hierarchy for pension plan assets associated with the FCX plans follows:
	Fair Value at December 31, 2013
	Total			Level 1			Level 2			Level 3
Commingled/collective funds:
Global equity	$	623		$	—		$	623		$	—
U.S. small-cap equity	65			—			65			—
Real estate property	47			—			—			47
U.S. real estate securities	40			—			40			—
Fixed income debt securities	30			—			30			—
Short-term investments	5			—			5			—
Open-ended mutual funds:
Government bonds	43			43			—			—
Emerging markets equity	41			41			—			—
Corporate bonds	33			33			—			—
Mutual funds:
Foreign bonds	51			51			—			—
Emerging markets equity	26			26			—			—
Emerging markets bond	20			20			—			—
Fixed income:
Government bonds	198			—			198			—
Corporate bonds	52			—			52			—
Private equity investments	43			—			—			43
Other investments	29			1			28			—
Total investments	1,346			$	215		$	1,041		$	90
Cash and receivables	18
Payables	(14		)
Total pension plan net assets	$	1,350
	Fair Value at December 31, 2012
	Total			Level 1			Level 2			Level 3
Commingled/collective funds:
Global equity	$	481		$	—		$	481		$	—
U.S. real estate securities	61			—			61			—
U.S. small-cap equity	52			—			52			—
Real estate property	41			—			—			41
Short-term investments	40			—			40			—
Open-ended mutual funds:
Government bonds	48			48			—			—
Emerging markets equity	41			41			—			—
Corporate bonds	23			23			—			—
Mutual funds:
Foreign bonds	54			54			—			—
Emerging markets bond	37			37			—			—
Emerging markets equity	28			28			—			—
Fixed income:
Government bonds	241			—			241			—
Corporate bonds	82			—			82			—
Private equity investments	45			—			—			45
Other investments	33			1			32			—
Total investments	1,307			$	232		$	989		$	86
Cash and receivables	5
Payables	(12		)
Total pension plan net assets	$	1,300
Following is a description of the pension plan asset categories and the valuation techniques used to measure fair value. There have been no changes to the techniques used to measure fair value.
Commingled/collective funds are managed by several fund managers and are valued at the net asset value per unit of the fund. For most of these funds, the majority of the underlying assets are actively traded equity securities; however, the unit level is considered to be at the fund level. These funds (except the real estate property funds) require less than a month's notice for redemptions and, as such, are classified within Level 2 of the fair value hierarchy. Real estate property funds are valued at net realizable value using information from independent appraisal firms, who have knowledge and expertise about the current market values of real property in the same vicinity as the investments. Redemptions of the real estate property funds are allowed once per quarter, subject to available cash and, as such, are classified within Level 3 of the fair value hierarchy.
Open-ended mutual funds are managed by registered investment companies and are valued at the daily published net asset value of shares/units held. Because redemptions and purchases of shares/units occur at the net asset value without any adjustments to the published net asset value that is provided on an ongoing basis (active-market criteria are met), these investments are classified within Level 1 of the fair value hierarchy.
Mutual funds are valued at the closing price reported on the active market on which the individual securities are traded and, as such, are classified within Level 1 of the fair value hierarchy.
Fixed income investments include government and corporate bonds held directly by the Master Trust or through commingled funds. Fixed income securities are valued using a bid evaluation price or a mid-evaluation price and, as such, are classified within Level 2 of the fair value hierarchy. A bid evaluation price is an estimated price at which a dealer would pay for a security. A mid-evaluation price is the average of the estimated price at which a dealer would sell a security and the estimated price at which a dealer would pay for a security. These evaluations are based on quoted prices, if available, or models that use observable inputs.
Private equity investments are valued at net realizable value using information from general partners and, as such, are classified within Level 3 of the fair value hierarchy because of the inherent restrictions on redemptions that may affect the ability to sell the investments at their net asset value in the near term.
A summary of changes in the fair value of FCX’s Level 3 pension plan assets for the years ended December 31 follow:
	Private			Real			Total
	Equity			Estate
	Investments			Property
Balance at January 1, 2012	$	50		$	35		$	85
Actual return on plan assets:
Realized gains	—			2			2
Net unrealized (losses) gains related to
assets still held at the end of the year	(5		)	4			(1		)
Purchases	4			—			4
Settlements, net	(4		)	—			(4		)
Balance at December 31, 2012	45			41			86
Actual return on plan assets:
Realized gains	—			1			1
Net unrealized (losses) gains related to
assets still held at the end of the year	(1		)	6			5
Purchases	3			—			3
Sales	—			(1		)	(1		)
Settlements, net	(4		)	—			(4		)
Balance at December 31, 2013	$	43		$	47		$	90
A summary of the fair value hierarchy for pension plan assets associated with the PT-FI plan follows:
	Fair Value at December 31, 2013
	Total			Level 1			Level 2			Level 3
Common stocks	$	27		$	27		$	—		$	—
Government bonds	23			23			—			—
Mutual funds	12			12			—			—
Total investments	62			$	62		$	—		$	—
Cash and receivablesa	62
Total pension plan net assets	$	124
	Fair Value at December 31, 2012
	Total			Level 1			Level 2			Level 3
Common stocks	$	32		$	32		$	—		$	—
Government bonds	27			27			—			—
Mutual funds	10			10			—			—
Total investments	69			$	69		$	—		$	—
Cash and receivablesa	61
Total pension plan net assets	$	130
a.	Cash consisted primarily of short-term time deposits.
Following is a description of the valuation techniques used for pension plan assets measured at fair value associated with the PT-FI plan. There have been no changes to the techniques used to measure fair value.
Common stocks, government bonds and mutual funds are valued at the closing price reported on the active market on which the individual securities are traded and, as such, are classified within Level 1 of the fair value hierarchy.
The techniques described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while FCX believes its valuation techniques are appropriate and consistent with other market participants, the use of different techniques or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.
The expected benefit payments for FCX’s and PT-FI’s pension plans follow:
	FCX			PT-FIa
2014	$	93		$	21
2015	147			12
2016	99			13
2017	102			18
2018	106			21
2019 through 2023	584			194
a.	Based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar.
Postretirement and Other Benefits.  FCX also provides postretirement medical and life insurance benefits for certain U.S. employees and, in some cases, employees of certain international subsidiaries. These postretirement benefits vary among plans, and many plans require contributions from retirees. The expected cost of providing such postretirement benefits is accrued during the years employees render service.
The discount rate for FCX’s postretirement medical and life insurance benefit plans was determined on the same basis as FCX’s pension plans. Information on the postretirement benefit plans as of December 31 follows:
	2013			2012
Change in benefit obligation:
Benefit obligation at beginning of year	$	213		$	223
Service cost	1			1
Interest cost	7			9
Actuarial (gains) losses	(24		)	2
Plan amendments and acquisition	6			—
Benefits paid, net of employee and joint venture partner
contributions, and Medicare Part D subsidy	(21		)	(22		)
Benefit obligation at end of year	182			213
Change in plan assets:
Fair value of plan assets at beginning of year	—			—
Employer and joint venture partner contributions	23			25
Employee contributions	11			10
Benefits paid	(34		)	(35		)
Fair value of plan assets at end of year	—			—
Funded status	$	(182	)	$	(213	)
Discount rate assumption	4.3		%	3.5		%
Balance sheet classification of funded status:
Accounts payable and accrued liabilities	$	(19	)	$	(21	)
Other liabilities	(163		)	(192		)
Total	$	(182	)	$	(213	)
Expected benefit payments for these plans total $19 million for 2014, $18 million for 2015, $17 million for 2016, $16 million for 2017, $15 million for 2018 and $70 million for 2019 through 2023. The discount rate used to determine net periodic benefit cost and the components of net periodic benefit cost for FCX’s postretirement benefits was 3.50 percent in 2013, 4.20 percent in 2012 and 4.90 percent in 2011. The medical-care trend rates at December 31, 2013 and 2012, assumed the first year trend rate was 7.75 percent, which declines over the next 15 years with an ultimate trend rate of 4.25 percent.
FCX has a number of postemployment plans covering severance, long-term disability income, continuation of health and life insurance coverage for disabled employees or other welfare benefits. The accumulated postemployment benefit consisted of a current portion of $9 million (included in accounts payable and accrued liabilities) and a long-term portion of $75 million (included in other liabilities) at December 31, 2013, and a current portion of $8 million and a long-term portion of $69 million at December 31, 2012.
FCX also sponsors savings plans for the majority of its U.S. employees. The plans allow employees to contribute a portion of their pre-tax income in accordance with specified guidelines. These savings plans are principally qualified 401(k) plans for all U.S. salaried and non-bargained hourly employees. In these plans, participants exercise control and direct the investment of their contributions and account balances among various investment options. FCX contributes to these plans at varying rates and matches a percentage of employee pre-tax deferral contributions up to certain limits, which vary by plan. For employees whose eligible compensation exceeds certain levels, FCX provides an unfunded defined contribution plan, which has a liability balance of $65 million at December 31, 2013, and $59 million at December 31, 2012.
The costs charged to operations for employee savings plans totaled $66 million in 2013 (of which $5 million was capitalized to oil and gas properties), $43 million in 2012 and $35 million in 2011. FCX has other employee benefit plans, certain of which are related to FCX’s financial results, which are recognized in operating costs.

STOCKHOLDERS_EQUITY_AND_STOCKB

STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity and Stock-Based Compensation	'
	STOCKHOLDERS’ EQUITY AND STOCK-BASED COMPENSATION
	FCX’s authorized shares of capital stock total 1.85 billion shares, consisting of 1.8 billion shares of common stock and 50 million shares of preferred stock.
	Common Stock.  At December 31, 2013, 23.7 million shares remain available for purchase under FCX's open-market share purchase program, which does not have an expiration date. There have been no purchases under this program since 2008. The timing of future purchases of FCX’s common stock is dependent on many factors, including FCX’s operating results, cash flows and financial position; copper, molybdenum, gold, crude oil and natural gas prices; the price of FCX’s common stock; and general economic and market conditions.
	FCX’s Board of Directors (the Board) authorized an increase in the cash dividend on FCX’s common stock in February 2012 to the current annual rate of $1.25 per share. The Board declared supplemental cash dividends of $0.50 per share, which was paid in June 2011, and $1.00 per share, which was paid in July 2013. On December 20, 2013, the Board declared a regular quarterly dividend of $0.3125 per share, which was paid on February 3, 2014, to common shareholders of record at the close of business on January 15, 2014. The declaration of dividends is at the discretion of the Board and will depend on FCX's financial results, cash requirements, future prospects and other factors deemed relevant by the Board.
	Accumulated Other Comprehensive Loss. A summary of changes in the balances of each component of accumulated other comprehensive loss follows:
		Unrealized Losses on Securities				Translation Adjustment				Defined Benefit Plans				Deferred Tax Valuation Allowance			Total
	Balance at January 1, 2011	$	(3	)		$	8			$	(269	)		$	(59	)	$	(323	)
	Amounts arising during the perioda,b	(1		)		(2		)		(134		)		(20		)	(157		)
	Amounts reclassifiedc	—				—				15				—			15
	Balance at December 31, 2011	(4		)		6				(388		)		(79		)	(465		)
	Amounts arising during the perioda,b	—				(1		)		(65		)		(1		)	(67		)
	Amounts reclassifiedc	—				—				26				—			26
	Balance at December 31, 2012	(4		)		5				(427		)		(80		)	(506		)
	Amounts arising during the perioda,b	(1		)		—				67				—			66
	Amounts reclassifiedc	—				5				30				—			35
	Balance at December 31, 2013	$	(5	)		$	10			$	(330	)		$	(80	)	$	(405	)
	a.	Included net actuarial gains (losses), net of noncontrolling interest, totaling $(215) million for 2011, $(103) million for 2012 and $137 million for 2013. The year 2013 also included $33 million for prior service costs.
	b.	Included tax benefits (provision) totaling $81 million for 2011, $39 million for 2012 and $(37) million for 2013.
	c.	Included amortization primarily related to actuarial losses that were net of taxes of $8 million for 2011, $15 million for 2012 and $17 million for 2013.
	Stock Award Plans.  FCX currently has awards outstanding under its stock-based compensation plans. As of December 31, 2013, only one plan, which was stockholder approved and is discussed below, has awards available for grant.
	The 2006 Stock Incentive Plan (the 2006 Plan) provides for the issuance of stock options, SARs, restricted stock, RSUs and other stock-based awards for up to 74 million common shares. FCX’s stockholders approved amendments to the plan in 2007 primarily to increase the number of shares available for grants and in 2010 to permit grants to outside directors. As of December 31, 2013, shares available for grant totaled 24.5 million under the 2006 Plan.
	In connection with the PXP and MMR acquisitions, former PXP and MMR share-based awards were exchanged or settled. Each unvested PXP and MMR share-based award outstanding prior to the acquisitions' announcement on December 5, 2012, immediately vested at the closing of each transaction, except for MMR share-based awards held by certain officers. In accordance with the terms of the respective plans, share-based awards granted after the acquisitions' announcement did not automatically vest upon closing but retain the same terms and conditions as the original awards, as provided in the merger agreements.
	In connection with the PXP acquisition, former PXP stock-settled RSUs, cash-settled RSUs and SARs were converted into 1,238,685 FCX stock-settled RSUs, 2,259,708 FCX cash-settled RSUs, and 2,374,601 FCX SARs. The SARs carry a maximum term of five years with 1,490,998 vested upon acquisition of PXP and 883,603 that vest ratably over a three-year period. In connection with the MMR acquisition, former MMR stock options and RSUs were converted into 7,203,392 FCX stock options and 13,500 FCX RSUs. The MMR-related stock options carry a maximum term of 10 years with 6,336,422 stock options vested upon acquisition of MMR and 866,970 stock options that vest ratably over a four-year period.
	In connection with the restructuring of an executive employment arrangement, a special retention award of one million RSUs was granted in December 2013. The RSUs are fully vested and the related shares of common stock will be delivered to the executive upon separation of service, along with a cash payment for accumulated dividends. With respect to stock options previously granted to this executive, such awards became fully vested. With respect to performance-based awards previously granted to this executive, the service requirements are considered to have been satisfied and the vesting of any such awards shall continue to be contingent upon the achievement of all performance conditions set forth in the award agreements. In connection with the restructuring, FCX recorded a $37 million charge to selling, general and administrative expenses in 2013.
	Stock-Based Compensation Cost. Compensation cost charged against earnings for stock-based awards for the years ended December 31 follows:
			2013				2012				2011
	Selling, general and administrative expenses		$	145			$	77			$	90
	Production and delivery		28				23				25
	Capitalized costs		13				—				—
	Total stock-based compensation		186				100				115
	Less: capitalized costs		(13		)		—				—
	Tax benefit and noncontrolling interests' shares		(66		)		(39		)		(46		)
	Impact on net income		$	107			$	61			$	69
	Stock Options and SARs. Stock options granted under the plans generally expire 10 years after the date of grant and vest in 25 percent annual increments beginning one year from the date of grant. The plans and award agreements provide that participants will receive the following year’s vesting after retirement. Therefore, FCX accelerates one year of amortization for retirement-eligible employees. Stock options granted prior to February 2012 provide for accelerated vesting if there is a change in control (as defined in the award agreements). Stock options granted after that date provide for accelerated vesting only upon certain qualifying termination of employment within one year following a change in control. SARs that were converted in connection with the PXP acquisition generally expire within five years after the date of grant and vest in one-third annual increments beginning one year from the date of grant. SARs are similar to stock options, but are settled in cash rather than in shares of common stock and are classified as liability awards.
	A summary of options and SARs outstanding as of December 31, 2013, including 1,927,037 SARs, and changes during the year ended December 31, 2013, follows:
		Number of			Weighted-				Weighted-		Aggregate
		Options and SARs			Average				Average		Intrinsic
					Exercise Price				Remaining		Value
									Contractual
									Term (years)
	Balance at January 1	31,472,559			$	37.4
	Conversion of MMR options	7,203,392			27.64
	Conversion of PXP SARs	2,374,601			27.34
	Granted	5,479,930			35
	Exercised	(976,220	)		18.77
	Expired/Forfeited	(423,601	)		41.83
	Balance at December 31	45,130,661			35.39				5.6		$	239
	Vested and exercisable at December 31	31,748,346			$	33.4			4.7		$	210
	Summaries of options and SARs outstanding and changes during the years ended December 31 follow:
		2012							2011
		Number of			Weighted-				Number of			Weighted-
		Options and SARs			Average				Options and SARs			Average
					Exercise							Exercise
					Price							Price
	Balance at January 1	27,967,145			$	34.9			26,930,444			$	30.22
	Granted	5,050,500			46.32				4,230,500			55.43
	Exercised	(1,300,273	)		16.68				(3,044,174	)		21.88
	Expired/Forfeited	(244,813	)		45.23				(149,625	)		37.61
	Balance at December 31	31,472,559		a	37.4				27,967,145		a	34.9
	a.	Included 39,336 SARs at December 31, 2012, and 69,672 SARs at December 31, 2011.
	The fair value of each stock option is estimated on the date of grant using the Black-Scholes-Merton option valuation model. The fair value of each SAR is determined using the Black-Scholes-Merton option valuation model and remeasured at each reporting date until the date of settlement. Expected volatility is based on implied volatilities from traded options on FCX’s common stock and historical volatility of FCX’s common stock. FCX uses historical data to estimate future option and SARs exercises, forfeitures and expected life. When appropriate, separate groups of employees who have similar historical exercise behavior are considered separately for valuation purposes. The expected dividend rate is calculated using the annual dividend (excluding supplemental dividends) at the date of grant. The risk-free interest rate is based on Federal Reserve rates in effect for bonds with maturity dates equal to the expected term of the option or SAR.
	Information related to stock options during the years ended December 31 follows:
		2013				2012				2011
Weighted-average assumptions used to value stock option awards:
Expected volatility	48.9		%		52		%		50.9		%
Expected life of options (in years)	4.66				4.54				4.34
Expected dividend rate	3.3		%		3.1		%		1.8		%
Risk-free interest rate	0.7		%		0.7		%		1.6		%
Weighted-average grant date fair value (per share)	$	10.98			$	15.6			$	20.58
Intrinsic value of options exercised	$	10			$	34			$	101
Fair value of options vested	$	101			$	77			$	89
As of December 31, 2013, FCX had $76 million of total unrecognized compensation cost related to unvested stock options expected to be recognized over a weighted-average period of 1.5 years.
The assumptions used to value SARs as of December 31, 2013, ranged from 28.8 percent to 34.8 percent for expected volatility; one to four years for expected life; 0.1 percent to 1.1 percent for expected risk-free interest rate; and an expected dividend rate of 3.6 percent. The weighted-average grant-date fair value of SARs granted was $7.00 for the period from June 1, 2013, to December 31, 2013, and $7.94 for the PXP awards that were converted to FCX SARs based on the acquisition-date fair value. The total intrinsic value of SARs exercised during 2013 was $3 million. As of December 31, 2013, FCX had $6 million of total unrecognized compensation cost related to unvested SARs expected to be recognized over a weighted-average period of 2.1 years. As of December 31, 2013, FCX had $16.0 million associated with SARs included in accounts payable and accrued liabilities.
Stock-Settled RSUs. FCX has an annual incentive plan for its executive officers that requires a portion of each executive officer's annual bonus be paid in performance-based RSUs. The maximum annual incentive award pool is a percentage of FCX’s consolidated operating cash flows adjusted for changes in working capital and other tax payments for the preceding year and funding of the pool is subject to a performance condition. Grants of RSUs before 2012 vest ratably over three years and provide that the FCX executive officers will receive the following year’s vesting upon retirement provided the performance condition is met. The fair value of these restricted stock unit grants was estimated based on projected operating cash flows for the applicable year and was charged to expense ratably over three years, beginning with the year during which the cash flows were generated, as performance of services commenced in the calendar year preceding the date of grant. In February 2012, the terms of RSU awards under the annual incentive plan were revised. For grants in 2012 and 2013, the level of RSUs granted continued to be based on FCX's consolidated operating cash flows adjusted for changes in working capital and other tax payments for the preceding year, but the award will vest after three years, subject to FCX attaining a five-year average return on investment (a performance condition defined in the award agreement) of at least six percent. The awards will also be subject to a 20 percent reduction if FCX performs below a group of its peers as defined in the award agreement. The fair value of the awards is estimated using an appropriate valuation model. The awards continue to vest after the recipients' retirement or death; therefore, since all of FCX's executive officers are retirement eligible, FCX charges the cost of these awards to expense in the year the cash flows are generated, as performance of services is only required in the calendar year preceding the date of grant.
In February 2013, FCX granted RSUs to key employees that cliff-vest at the end of three years. The fair value of the RSUs is amortized ratably over the three-year vesting period.
FCX also grants other RSUs that vest over a period of four years to its directors. The plans and award agreements provide for accelerated vesting of all RSUs if there is a change of control (as defined in the plans). The fair value of the RSUs is amortized over the four-year vesting period or the period until the director becomes retirement eligible, whichever is shorter. Upon a director’s retirement, all of their unvested RSUs immediately vest. For retirement-eligible directors, the fair value of RSUs is recognized in earnings on the date of grant.
Dividends and interest on most RSUs accrue and are paid if the award vests. A summary of outstanding stock-settled RSUs as of December 31, 2013, and activity during the year ended December 31, 2013, follows:
	Number of Stock-Settled RSUs			Weighted-Average Grant-Date Fair Value				Weighted-		Aggregate
								Average		Intrinsic
								Remaining		Value
								Contractual
								Term (years)
Balance at January 1	889,698			$	44.35
Granted	2,492,600			34.84
Conversion of PXP and MMR RSUs	1,252,185			31.05
Vested	(356,275	)		41.96
Forfeited	(22,732	)		31.92
Balance at December 31	4,255,476			35.13				4.1		$	161
The total fair value of stock-settled RSUs granted during the year ended December 31, 2013, was $125 million, including $38 million for PXP awards that were converted to FCX stock-settled RSUs based on the acquisition-date fair value. The total intrinsic value of RSUs vested was $12 million during 2013, $28 million during 2012 and $69 million during 2011. As of December 31, 2013, FCX had $38 million of total unrecognized compensation cost related to unvested stock-settled RSUs expected to be recognized over 2.1 years.
Cash-Settled RSUs. Cash-settled RSUs are similar to stock-settled RSUs, but are settled in cash rather than in shares of common stock and are classified as liability awards. These cash-settled RSUs generally vest over periods ranging from three to five years of service. The fair value of these awards is remeasured each reporting period until the vesting dates.
A summary of outstanding cash-settled RSUs as of December 31, 2013, and activity from June 1, 2013, to December 31, 2013, follows:
	Number of Cash-Settled RSUs			Weighted-Average Grant-Date Fair Value				Weighted-		Aggregate
								Average		Intrinsic
								Remaining		Value
								Contractual
								Term (years)
Conversion of PXP RSUs	2,259,708			$	31.05
Granted	1,430			32.94
Vested	(1,430	)		31.05
Forfeited	(39,896	)		31.05
Balance at December 31	2,219,812			31.05				1.9		$	84
The total fair value of PXP awards that were converted to FCX cash-settled RSUs was $70 million at the acquisition date. As of December 31, 2013, the accrued liability associated with cash-settled RSUs consisted of a current portion of $17 million (included in accounts payable and accrued liabilities) and a long-term portion of $19 million (included in other liabilities).
Other Information. The following table includes amounts related to exercises of stock options and vesting of RSUs during the years ended December 31:
	2013				2012				2011
FCX shares tendered to pay the exercise price
and/or the minimum required taxesa	3,294,624				515,558				936,811
Cash received from stock option exercises	$	8			$	15			$	48
Actual tax benefit realized for tax deductions	$	8			$	16			$	45
Amounts FCX paid for employee taxes	$	105			$	16			$	45
a.	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.

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Geographic sources of income before income taxes and equity in affiliated companies’ net earnings for the years ended December 31 consist of the following:
		2013				2012				2011
	United States	$	1,104			$	1,539			$	2,112
	Foreign	3,809				3,948				6,706
	Total	$	4,913			$	5,487			$	8,818
	FCX’s provision for income taxes for the years ended December 31 consists of the following:
		2013				2012				2011
	Current income taxes:
	Federal	$	203			$	238			$	394
	State	9				7				21
	Foreign	1,081				1,002				1,934
	Total current	1,293				1,247				2,349
	Deferred income taxes (benefits):
	Federal	234				87				82
	State	(35		)		18				(19		)
	Foreign	346				363				622
	Total deferred	545				468				685
	Adjustments	(199		)	a	(205		)	b,c	53			d
	Federal operating loss carryforwards	(164		)	e	—				—
	Provision for income taxes	$	1,475			$	1,510			$	3,087
	a.	As a result of the oil and gas acquisitions, FCX recognized a net tax benefit of $199 million consisting of income tax benefits of $190 million associated with net reductions in FCX's valuation allowances, $69 million related to the release of the deferred tax liability on PXP's investment in MMR common stock and $16 million associated with the revaluation of state deferred tax liabilities, partially offset by income tax expense of $76 million associated with the write off of deferred tax assets related to environmental liabilities.
	b.	In 2012, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde) signed a new 15-year mining stability agreement with the Peruvian government, which became effective January 1, 2014. In connection with the new mining stability agreement, Cerro Verde's income tax rate increased from 30 percent to 32 percent, and FCX recognized additional deferred tax expense of $29 million.
	c.	With the exception of TFM, FCX has not elected to permanently reinvest earnings from its foreign subsidiaries and has recorded deferred tax liabilities for foreign earnings that are available to be repatriated to the U.S. Cerro Verde previously recorded deferred Peruvian income tax liabilities for income taxes that would become payable if the reinvested profits used to fund the initial Cerro Verde sulfide expansion were distributed prior to the expiration of Cerro Verde's 1998 stability agreement on December 31, 2013. Because reinvested profits at Cerro Verde were not expected to be distributed prior to December 31, 2013, a net deferred income tax liability of $234 million was reversed and recognized as an income tax benefit in 2012.
	d.	In September 2011, Peru enacted a new mining tax and royalty regime and also created a special mining burden that companies with stability agreements could elect to pay. Cerro Verde elected to pay this special mining burden during the remaining term of its 1998 stability agreement, which expired on December 31, 2013. As a result, Cerro Verde recognized additional tax expense of $53 million in 2011.
	e.	Benefit from the use of federal operating loss carryforwards acquired as part of the oil and gas acquisitions.
	A reconciliation of the U.S. federal statutory tax rate to FCX’s effective income tax rate for the years ended December 31 follows:
		2013							2012						2011
		Amount				Percent			Amount				Percent		Amount			Percent
	U.S. federal statutory tax rate	$	1,720			35	%		$	1,920			35	%	$	3,086		35	%
	Foreign tax credit limitation	117				2			110				2		163			2
	Percentage depletion	(223		)		(5	)		(263		)		(5	)	(283		)	(3	)
	Withholding and other impacts on
	foreign earnings	83				2			(221		)	b	(4	)	170			2
	Valuation allowance on minimum
	tax credits	(190		)	a	(4	)		(9		)		—		(47		)	(1	)
	State income taxes	(43		)		—			17				—		—			—
	Other items, net	11			a	—			(44		)		—		(2		)	—
	Provision for income taxes	$	1,475			30	%		$	1,510			28	%	$	3,087		35	%
	a.	Included a net tax benefit of $199 million as a result of the oil and gas acquisitions.
	b.	Included the reversal of Cerro Verde's deferred income tax liability of $234 million.
	FCX paid federal, state, local and foreign income taxes totaling $1.3 billion in 2013, $1.8 billion in 2012 and $3.4 billion in 2011. FCX received refunds of federal, state, local and foreign income taxes of $270 million in 2013, $69 million in 2012 and $15 million in 2011.
	The components of deferred taxes follow:
		December 31,
		2013				2012
	Deferred tax assets:
	Foreign tax credits	$	2,144			$	2,022
	Accrued expenses	1,098				819
	Minimum tax credits	603				474
	Net operating loss carryforwards	925				343
	Employee benefit plans	443				315
	Other	557				374
	Deferred tax assets	5,770				4,347
	Valuation allowances	(2,487		)		(2,443		)
	Net deferred tax assets	3,283				1,904
	Deferred tax liabilities:
	Property, plant, equipment and mining development costs	(4,887		)		(4,462		)
	Oil and gas properties	(4,708		)		—
	Undistributed earnings	(936		)		(884		)
	Other	(34		)		(70		)
	Total deferred tax liabilities	(10,565		)		(5,416		)
	Net deferred tax liabilities	$	(7,282	)		$	(3,512	)
	At December 31, 2013, FCX had U.S. foreign tax credit carryforwards of $2.1 billion that will expire between 2014 and 2023, and U.S. minimum tax credit carryforwards of $603 million that can be carried forward indefinitely, but may be used only to the extent that regular tax exceeds the alternative minimum tax in any given year.
At December 31, 2013, FCX had (i) DRC net operating loss carryforwards of $70 million that can be carried forward indefinitely, (ii) U.S. state net operating loss carryforwards of $2.3 billion that expire between 2014 and 2033, (iii) Spanish net operating loss carryforwards of $629 million that expire between 2015 and 2030, and (iv) U.S. federal net operating loss carryforwards of $1.7 billion that expire between 2022 and 2033.
On the basis of available information at December 31, 2013, including positive and negative evidence, FCX has provided valuation allowances for certain of its deferred tax assets where it believes it is more likely than not that some portion or all of such assets will not be realized. Valuation allowances totaled $2.5 billion at December 31, 2013, and $2.4 billion at December 31, 2012, and covered all of FCX’s U.S. foreign tax credit carryforwards, and a portion of its foreign net operating loss carryforwards, U.S. state net operating loss carryforwards, U.S. state deferred tax assets and U.S. capital loss carryforwards. In addition, the valuation allowance at December 31, 2012, covered a portion of U.S. minimum tax credit carryforwards.
The $2.5 billion valuation allowance at December 31, 2013, is primarily related to FCX’s U.S. foreign tax credits. FCX has operations in tax jurisdictions where statutory income taxes and withholding taxes combine to create effective tax rates in excess of the U.S. federal income tax liability that would be due upon repatriation of foreign earnings into the U.S. As a result, FCX continues to generate foreign tax credits for which no benefit will be realized. A full valuation allowance will continue to be carried on U.S. foreign tax credit carryforwards until such time that FCX believes it will generate a U.S. income tax liability from foreign source income in excess of foreign taxes paid on such income, or a prudent and feasible means of securing the benefit of U.S. foreign tax credit carryforwards can be implemented.
The $44 million increase in the valuation allowance during 2013 was primarily a result of an increase in FCX's U.S. foreign tax credit carryforwards, U.S. state deferred tax assets, U.S. capital loss carryforwards and U.S. state net operating loss carryforwards, partially offset by a release of a valuation allowance on U.S. federal minimum tax credit carryforwards. The release of the valuation allowance on minimum tax credit carryforwards occurred as a result of the oil and gas acquisitions. Deferred income tax liabilities assumed in these acquisitions provided sufficient evidence that FCX would more likely than not realize a future benefit from its current U.S. minimum tax credit carryforwards. The reduction in the valuation allowance was allocated to income from continuing operations.
In 2010, the Chilean legislature approved an increase in mining royalty taxes to help fund earthquake reconstruction activities, education and health programs. Mining royalty taxes at FCX’s El Abra and Candelaria mines were stabilized through 2017 at a rate of 4 percent. However, under the legislation, FCX opted to transfer from its stabilized rate to the sliding scale of 4 to 9 percent for the years 2011 and 2012 and returned to its 4 percent rate for the years 2013 through 2017. Beginning in 2018 and through 2023, rates will move to a sliding scale of 5 to 14 percent (depending on a defined operational margin).
In December 2011, the U.S. Treasury Department issued temporary and proposed regulations on the treatment of amounts paid for repair and maintenance costs of fixed assets. These regulations generally apply to tax years beginning on or after January 1, 2014. Transitional rules providing procedural guidance were published in March 2012, and the regulations were finalized in September 2013. Additional transitional guidance was published in January 2014. Neither the regulations nor the additional procedural guidance are expected to have a material impact on FCX's results of operations or financial condition.
A summary of the activities associated with FCX’s reserve for unrecognized tax benefits, interest and penalties follows:
	Unrecognized				Interest				Penalties
	Tax Benefits
Balance at January 1, 2012	$	146			$	34			$	—
Additions:
Prior year tax positions	17				*				*
Current year tax positions	24				*				*
Interest and penalties	—				3				—
Decreases:
Prior year tax positions	(37		)		*				*
Current year tax positions	—				*				*
Settlements with tax authorities	(11		)		*				*
Lapse of statute of limitations	(1		)		*				*
Interest and penalties	—				(6		)		—
Balance at December 31, 2012	138				31				—
Additions:
Prior year tax positions	18				*				*
Current year tax positions	14				*				*
Acquisition of PXP	5				*				*
Interest and penalties	—				7				—
Decreases:
Prior year tax positions	(37		)		*				*
Current year tax positions	—				*				*
Settlements with tax authorities	—				*				*
Lapse of statute of limitations	(28		)		*				*
Interest and penalties	—				(17		)		—
Balance at December 31, 2013	$	110			$	21			$	—
* Amounts not allocated.
The reserve for unrecognized tax benefits of $110 million at December 31, 2013, included $97 million ($49 million net of income tax benefits) that, if recognized, would reduce FCX’s provision for income taxes.
Changes to the reserve for unrecognized tax benefits associated with current year tax positions were primarily related to uncertainties associated with FCX's cost recovery methods and deductibility of contributions. Changes in the reserve for unrecognized tax benefits associated with prior year tax positions were primarily related to uncertainties associated with cost recovery methods, U.S. state filing combinations and benefits received from stock based compensation. Changes to the reserve for unrecognized tax benefits associated with the lapse of statute of limitations were primarily related to U.S. state filing combinations and characterization of non-recurring income items. There continues to be uncertainty related to the timing of settlements with taxing authorities, but if additional settlements are agreed upon during the year 2014, FCX could experience a change in its reserve for unrecognized tax benefits.
FCX or its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. The tax years for FCX's major tax jurisdictions that remain subject to examination are as follows:
Jurisdiction		Years Subject to Examination		Additional Open Years
U.S. Federal		2007-2012		2013
Indonesia		2005-2008, 2011-2012		2009-2010, 2013
Peru		2009-2010		2011-2013
Chile		2011-2012		2013
Africa		2010-2012		2013

CONTINGENCIES

CONTINGENCIES	12 Months Ended
	Dec. 31, 2013
Contingencies [Abstract]	'
Contingencies	'
	CONTINGENCIES
	Environmental.  FCX subsidiaries are subject to various national, state and local environmental laws and regulations that govern emissions of air pollutants; discharges of water pollutants; and generation, handling, storage and disposal of hazardous substances, hazardous wastes and other toxic materials, including remediation, restoration and reclamation of environmental contamination. FCX subsidiaries that operate in the U.S. also are subject to potential liabilities arising under CERCLA and similar state laws that impose responsibility on current and previous owners and operators of a facility for the remediation of hazardous substances released from the facility into the environment, including damages to natural resources, irrespective of when the damage to the environment occurred or who caused it. This remediation liability also extends to persons who arranged for the disposal of hazardous substances or transported the hazardous substances to a disposal site selected by the transporter. This liability often is shared on a joint and several basis, meaning that each responsible party is fully responsible for the remediation, although in many cases some or all of the other historical owners or operators no longer exist, do not have the financial ability to respond or cannot be found. As a result, because of FCX’s acquisition of FMC in 2007, many of the subsidiary companies FCX now owns are responsible for a wide variety of environmental remediation projects throughout the U.S., and FCX expects to spend substantial sums annually for many years to address those remediation issues. Certain FCX subsidiaries have been advised by the U.S. Environmental Protection Agency (EPA), the Department of the Interior, the Department of Agriculture and several state agencies that, under CERCLA or similar state laws and regulations, they may be liable for costs of responding to environmental conditions at a number of sites that have been or are being investigated to determine whether releases of hazardous substances have occurred and, if so, to develop and implement remedial actions to address environmental concerns. FCX is also subject to claims where the release of hazardous substances is alleged to have damaged natural resources (NRD). As of December 31, 2013, FCX had more than 100 active remediation projects, including NRD claims, in 28 U.S. states.
	A summary of changes in environmental obligations for the years ended December 31 follows:
		2013				2012				2011
	Balance at beginning of year	$	1,222			$	1,453			$	1,422
	Accretion expensea	79				80				88
	Additions	73				70				132
	Reductionsb	(77		)		(182		)		(68		)
	Spending	(130		)		(199		)		(121		)
	Balance at end of year	1,167				1,222				1,453
	Less current portion	(121		)		(186		)		(205		)
	Long-term portion	$	1,046			$	1,036			$	1,248
	a.	Represented accretion of the fair value of environmental obligations assumed in the 2007 acquisition of FMC, which were determined on a discounted cash flow basis.
	b.	Reductions primarily reflected revisions for changes in the anticipated scope and timing of environmental remediation projects and the noncash adjustments of environmental matters.
	Estimated environmental cash payments (on an undiscounted and unescalated basis) total $121 million in 2014, $151 million in 2015, $116 million in 2016, $122 million in 2017, $110 million in 2018 and $2.0 billion thereafter. The amount and timing of these estimated payments will change as a result of changes in regulatory requirements, changes in scope and timing of remediation activities, the settlement of environmental matters and as actual spending occurs.
	In 2007, FCX recorded FMC’s environmental obligations at fair value on the acquisition date in accordance with business combination accounting guidance. Significant adjustments to these obligations may occur in the future. New environmental obligations will be recorded as described in Note 1 under “Environmental Expenditures.” At December 31, 2013, FCX’s environmental obligations totaled $1.2 billion, including $1.1 billion recorded on a discounted basis for those obligations assumed in the FMC acquisition at fair value. On an undiscounted and unescalated basis, these obligations totaled $2.6 billion. FCX estimates it is reasonably possible that these obligations could range between $2.1 billion and $2.7 billion on an undiscounted and unescalated basis.
	FCX believes that there may be potential claims for recovery from third parties, including the U.S. government and other PRPs. These potential recoveries are not recognized unless realization is considered probable.
	At December 31, 2013, the most significant environmental obligations were associated with the Pinal Creek site in Arizona; the Newtown Creek site in New York City; historical smelter sites principally located in Arizona, Kansas, New Jersey, Oklahoma and Pennsylvania; and uranium mining sites in the western U.S. The recorded environmental obligations for these sites totaled $1.0 billion at December 31, 2013. A discussion of these sites follows.
	Pinal Creek. The Pinal Creek site was listed under the Arizona Department of Environmental Quality’s (ADEQ) Water Quality Assurance Revolving Fund program in 1989 for contamination in the shallow alluvial aquifers within the Pinal Creek drainage near Miami, Arizona. Since that time, environmental remediation was performed by members of the Pinal Creek Group (PCG), consisting of FMC Miami, Inc. (Miami), a wholly owned subsidiary of FMC, and two other companies. Pursuant to a 2010 settlement agreement, Miami agreed to take full responsibility for future groundwater remediation at the Pinal Creek site, with limited exceptions. Remediation work continues at this time and is expected to continue for many years in the future.
	Newtown Creek. From the 1930s until 1964, Phelps Dodge Refining Corporation (PDRC), a subsidiary of FMC, operated a smelter, and from the 1930s until 1984, it operated a refinery on the banks of Newtown Creek (the creek), which is a 3.5-mile-long waterway that forms part of the boundary between Brooklyn and Queens in New York City. Heavy industrialization along the banks of the creek and discharges from the City of New York’s sewer system over more than a century resulted in significant environmental contamination of the waterway. In 2010, EPA notified PDRC and five others that EPA considers them to be PRPs under CERCLA. The notified parties began working with EPA to identify other PRPs, and EPA proposed that the notified parties perform a Remedial Investigation/Feasibility Study (RI/FS) at their expense and reimburse EPA for its oversight costs. EPA is not expected to propose a remedy until after a RI/FS is completed. Additionally, in 2010, EPA designated the creek as a Superfund site, and in 2011, PDRC and five other parties entered an Administrative Order on Consent (AOC) to perform a RI/FS to assess the nature and extent of environmental contamination in the creek and identify potential remedial options. The parties' RI/FS work under the AOC and their identification of other PRPs are ongoing and expected to take several years to complete. The actual costs of fulfilling this remedial obligation and the allocation of costs among PRPs are uncertain and subject to change based on the results of the RI/FS, the remediation remedy ultimately selected by EPA and related allocation determinations. Depending on the overall cost and the portion allocated to PDRC, that share could be material to FCX.
	Historical Smelter Sites. FMC and its predecessors at various times owned or operated copper and zinc smelters in states including Arizona, Kansas, New Jersey, Oklahoma and Pennsylvania. For some of these smelter sites, certain FCX subsidiaries have been advised by EPA or state agencies that they may be liable for costs of investigating and, if appropriate, remediating environmental conditions associated with the smelters. At other sites, certain FCX subsidiaries have entered into state voluntary remediation programs to investigate and, if appropriate, remediate site conditions associated with the smelters. The historical smelter sites are in various stages of assessment and remediation. FCX has been in the past and may again in the future be subject to litigation brought by private parties, regulators and local governmental authorities related to these historical smelter sites.
	Uranium Mining Sites. During a period between 1940 and the early 1970s, certain FMC predecessor entities and/or subsidiaries were involved in uranium exploration and mining in the western U.S., primarily on federal and tribal lands in the Four Corners region of the southwest. Similar exploration and mining activities by other companies have also caused environmental impacts warranting remediation, and EPA and local authorities are currently evaluating the need for significant cleanup activities in the region. To date, FMC has undertaken remediation at a limited number of sites associated with these predecessor entities. Initiatives to gather additional information about sites in the region are ongoing.
	Other. In December 2013, a lawsuit was filed against FCX's subsidiary that operates the Candelaria mine in Chile by the neighboring municipality of Tierra Amarilla (Municipality of Tierra Amarilla v. Compania Contractual Minera Candelaria, Second Environmental Court, Santiago, Chile, filed December 12, 2013). The complaint, which as of February 21, 2014, had not been served, was filed in a recently established environmental court and alleges extensive environmental harm, including alleged contamination of soils, air, surface water and groundwater, and depletion of water supplies, in addition to allegations regarding climate damage, traffic, dust, noise and nuisance associated with blastings. The complaint seeks broad relief that if granted could require FCX to cease some or all of its operations at Candelaria and nearby facilities and restore the environment to its original condition. Because of the early stage of the proceedings, FCX is currently unable to estimate the possible loss or range of loss, if any, that could result from this matter.
	Asset Retirement Obligations (AROs). FCX’s ARO estimates are reflected on a third-party cost basis and comply with FCX’s legal obligation to retire tangible, long-lived assets. A summary of changes in FCX’s AROs for the years ended December 31 follows:
		2013				2012				2011
	Balance at beginning of year	$	1,146			$	921			$	856
	Liabilities assumed in the acquisitions of PXP and MMRa	1,028				—				—
	Liabilities incurred	45				6				9
	Settlements and revisions to cash flow estimates, net	123				211				48
	Accretion expense	95				55				58
	Spending	(107		)		(47		)		(49		)
	Other	(2		)		—				(1		)
	Balance at end of year	2,328				1,146				921
	Less: current portion	(115		)		(55		)		(31		)
	Long-term portion	$	2,213			$	1,091			$	890
	a.	The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $287 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.
	ARO costs may increase or decrease significantly in the future as a result of changes in regulations, changes in engineering designs and technology, permit modifications or updates, changes in mine plans, changes in drilling plans, settlements, inflation or other factors and as actual reclamation spending occurs. ARO activities and expenditures for mining operations generally are made over an extended period of time commencing near the end of the mine life; however, certain reclamation activities may be accelerated if legally required or if determined to be economically beneficial. The methods used or required to plug and abandon non-producing oil and gas wellbores, remove platforms, tanks, production equipment and flow lines, and restore wellsites could change over time.
	New Mexico, Arizona, Colorado and other states require financial assurance to be provided for the estimated costs of mine reclamation and closure, including groundwater quality protection programs. FCX has satisfied financial assurance requirements by using a variety of mechanisms, primarily involving parent company performance guarantees and financial capability demonstrations, but also including trust funds, surety bonds, letters of credit and collateral. The applicable regulations specify financial strength tests that are designed to confirm a company’s or guarantor’s financial capability to fund estimated reclamation and closure costs. The amount of financial assurance FCX is required to provide will vary with changes in laws, regulations, reclamation and closure requirements, and cost estimates. At December 31, 2013, FCX’s financial assurance obligations associated with these closure and reclamation/restoration costs totaled $2.4 billion, of which $1.7 billion was in the form of guarantees issued by FCX and financial capability demonstrations of FCX. At December 31, 2013, FCX had trust assets totaling $158 million (included in other assets), which are legally restricted to be used to satisfy its financial assurance obligations for its mining properties in New Mexico.
	New Mexico Environmental and Reclamation Programs. FCX’s New Mexico operations are regulated under the New Mexico Water Quality Act and regulations adopted under that act by the Water Quality Control Commission (WQCC). The New Mexico Environment Department (NMED) has required each of these operations to submit closure plans for NMED’s approval. The closure plans must include measures to assure meeting groundwater quality standards following the closure of discharging facilities and to abate any groundwater or surface water contamination. In 2013, the WQCC adopted Supplemental Permitting Requirements for Copper Mining Facilities, which became effective on October 31, 2013. These rules identify closure requirements for copper mine facilities. The rules were adopted after an extensive stakeholder process in which FCX participated and were jointly supported by FCX and NMED. Although the rules are being challenged in the New Mexico courts by certain environmental organizations and the New Mexico Attorney General, their adoption, along with other commitments in a settlement agreement between NMED and FCX, have allowed NMED and FCX’s Tyrone operation to dismiss its appeal of a WQCC Final Order, dated February 4, 2009, regarding closure conditions applicable to the Tyrone mine. Finalized closure plan requirements, including those resulting from the newly adopted rules, could result in increases in closure costs for FCX's New Mexico operations.
	FCX’s New Mexico operations also are subject to regulation under the 1993 New Mexico Mining Act (the Mining Act) and the related rules that are administered by the Mining and Minerals Division (MMD) of the New Mexico Energy, Minerals and Natural Resources Department. Under the Mining Act, mines are required to obtain approval of plans describing the reclamation to be performed following cessation of mining operations. At December 31, 2013, FCX had accrued reclamation and closure costs of $465 million for its New Mexico operations. As stated above, additional accruals may be required based on the state’s review of FCX’s updated closure plans and any resulting permit conditions, and the amount of those accruals could be material.
	Arizona Environmental and Reclamation Programs. FCX’s Arizona properties are subject to regulatory oversight in several areas. ADEQ has adopted regulations for its aquifer protection permit (APP) program that require permits for, among other things, certain facilities, activities and structures used for mining, concentrating and smelting and require compliance with aquifer water quality standards at an applicable point of compliance well or location. The APP program also may require mitigation and discharge reduction or elimination of some discharges.
	An application for an APP requires a description of a closure strategy that will meet applicable groundwater protection requirements following cessation of operations and an estimate of the cost to implement the closure strategy. An APP may specify closure requirements, which may include post-closure monitoring and maintenance. A more detailed closure plan must be submitted within 90 days after a permitted entity notifies ADEQ of its intent to cease operations. A permit applicant must demonstrate its financial ability to meet the closure costs estimated in the APP.
	Portions of Arizona mining facilities that operated after January 1, 1986, also are subject to the Arizona Mined Land Reclamation Act (AMLRA). AMLRA requires reclamation to achieve stability and safety consistent with post-mining land use objectives specified in a reclamation plan. Reclamation plans must be approved by the State Mine Inspector and must include an estimate of the cost to perform the reclamation measures specified in the plan.
	FCX will continue to evaluate options for future reclamation and closure activities at its operating and non-operating sites, which are likely to result in adjustments to FCX’s ARO liabilities. At December 31, 2013, FCX had accrued reclamation and closure costs of $237 million for its Arizona operations.
	Colorado Reclamation Programs. FCX's Colorado operations are regulated by the Colorado Mined Land Reclamation Act (Reclamation Act) and regulations promulgated thereunder. Under the Reclamation Act, mines are required to obtain approval of reclamation plans describing the reclamation of lands affected by mining operations to be performed during mining or upon cessation of mining operations.  As of December 31, 2013, FCX had accrued reclamation and closure costs of $50 million for its Colorado operations.
	Chilean Reclamation and Closure Programs. In July 2011, the Chilean senate passed legislation regulating mine closure, which establishes new requirements for closure plans and became effective in November 2012. FCX's Chilean operations are required to update closure plans and provide financial assurance for these obligations. FCX cannot predict at this time the cost of these closure plans or the levels or forms of financial assurance that may be required. Revised closure plans for the Chilean mine sites are due in November 2014. At December 31, 2013, FCX had accrued reclamation and closure costs of $69 million for its Chilean operations.
	Peruvian Reclamation and Closure Programs. Cerro Verde is subject to regulation under the Mine Closure Law administered by the Peruvian Ministry of Energy and Mines. Under the closure regulations, mines must submit a closure plan that includes the reclamation methods, closure cost estimates, methods of control and verification, closure and post-closure plans and financial assurance. The updated closure plan for the Cerro Verde mine expansion was submitted to the Peruvian regulatory authorities in November 2013. At December 31, 2013, Cerro Verde had accrued reclamation and closure costs of $79 million.
	Indonesian Reclamation and Closure Programs. The ultimate amount of reclamation and closure costs to be incurred at PT-FI’s operations will be determined based on applicable laws and regulations and PT-FI’s assessment of appropriate remedial activities in the circumstances, after consultation with governmental authorities, affected local residents and other affected parties and cannot currently be projected with precision. Some reclamation costs will be incurred during mining activities, while most closure costs and the remaining reclamation costs will be incurred at the end of mining activities, which are currently estimated to continue for nearly 30 years. At December 31, 2013, PT-FI had accrued reclamation and closure costs of $249 million.
	In 1996, PT-FI began contributing to a cash fund ($18 million balance at December 31, 2013, which is included in other assets) designed to accumulate at least $100 million (including interest) by the end of its Indonesia mining activities. PT-FI plans to use this fund, including accrued interest, to pay mine closure and reclamation costs. Any costs in excess of the $100 million fund would be funded by operational cash flow or other sources.
	In December 2009, PT-FI submitted its revised mine closure plan to the Department of Energy and Mineral Resources for review and has addressed comments received during the course of this review process. In December 2010, the President of Indonesia issued a regulation regarding mine reclamation and closure, which requires a company to provide a mine closure guarantee in the form of a time deposit placed in a state-owned bank in Indonesia. In accordance with its Contract of Work, PT-FI is working with the Department of Energy and Mineral Resources to review these requirements, including discussion of other options for the mine closure guarantee.
	Oil and Gas Properties. Substantially all of FM O&G's oil and gas leases require that, upon termination of economic production, the working interest owners plug and abandon non-producing wellbores, remove equipment and facilities from leased acreage and restore land in accordance with applicable local, state and federal laws. FM O&G operating areas include the GOM, offshore and onshore California, the Gulf Coast and the Rocky Mountain area. FM O&G AROs cover more than 6,600 wells and more than 200 platforms and other structures. At December 31, 2013, FM O&G had accrued $1.1 billion associated with its AROs.
	Litigation. FCX is involved in numerous legal proceedings that arise in the ordinary course of business or are associated with environmental issues arising from legacy operations conducted over the years by FMC and its affiliates as discussed in this note under “Environmental.” FCX is also involved periodically in other reviews, investigations and proceedings by government agencies, some of which may result in adverse judgments, settlements, fines, penalties, injunctions or other relief. Management does not believe, based on currently available information, that the outcome of any legal proceeding reported below will have a material adverse effect on FCX's financial condition, although individual outcomes could be material to FCX's operating results for a particular period, depending on the nature and magnitude of the outcome and the operating results for the period. Refer to Note 1 for further discussion of FCX's accounting policy for litigation contingencies.
	Asbestos Claims. Since approximately 1990, FMC and various subsidiaries have been named as defendants in a large number of lawsuits that claim personal injury either from exposure to asbestos allegedly contained in electrical wire products produced or marketed many years ago or from asbestos contained in buildings and facilities located at properties owned or operated by FMC affiliates, or from alleged asbestos in talc products. Many of these suits involve a large number of codefendants. Based on litigation results to date and facts currently known, FCX believes there is a reasonable possibility that losses may have been incurred related to these matters; however, FCX also believes that the amounts of any such losses, individually or in the aggregate, are not material to its consolidated financial statements. There can be no assurance, however, that future developments will not alter this conclusion.
	Shareholder Litigation. Fourteen derivative actions challenging the PXP merger and/or the MMR merger were filed on behalf of FCX by purported FCX stockholders. Ten were filed in the Court of Chancery of the State of Delaware and three were filed in the Superior Court of the State of Arizona, County of Maricopa. On January 25, 2013, the Delaware Court of Chancery consolidated the Delaware actions into a single action, In Re Freeport-McMoRan Copper & Gold Inc. Derivative Litigation, No. 8145-VCN. On March 5, 2013, an additional complaint was filed in the Delaware Court of Chancery, Stephen Blau MD Money Purchase Pension Plan Trust v. Moffett et al., No. 8389-VCN. A motion to consolidate that action with In Re Freeport-McMoRan Copper & Gold Inc. Derivative Litigation is pending. On January 17, 2013, the Arizona Superior Court consolidated two of the Arizona actions into In Re Freeport-McMoRan Derivative Litigation, No. CV2012-018351. A third Arizona complaint, Harris v. Adkerson et al., No. CV2013-004163, was consolidated with the first two Arizona actions on February 8, 2013. On March 18, 2013, the Delaware Court of Chancery granted the stipulation made by the parties to allow the plaintiffs in In Re Freeport-McMoRan Derivative Litigation, No. CV2012-01835, to intervene in the consolidated Delaware action. On October 17, 2013, the Arizona Superior Court extended the permanent stay of the Arizona actions until March 31, 2014. The actions name some or all of the following as defendants: the directors and certain officers of FCX, two FCX subsidiaries, PXP and certain of its directors, and MMR and certain of its directors and officers. The actions allege, among other things, that the FCX directors breached their fiduciary duties to FCX stockholders because they, among other things, pursued their own interests at the expense of stockholders in approving the PXP and MMR mergers. The complaints also allege that some or all of the following parties aided and abetted the wrongful acts allegedly committed by the directors and certain officers of FCX: two FCX subsidiaries, PXP and certain of its directors, and MMR and certain of its directors and officers. The actions seek as relief, among other things, an injunction barring or rescinding both the PXP merger and the MMR merger and requiring submission of the proposed PXP merger and MMR merger to a vote of FCX stockholders, damages, and attorneys' fees and costs. On October 10, 2013, FCX and the other defendants filed a motion to dismiss the second amended consolidated complaint that was filed by plaintiffs on July 19, 2013. Oral argument on the motion to dismiss is scheduled in the Delaware Chancery Court on March 12, 2014. FCX intends to vigorously defend itself in these matters.
	Ten putative class actions challenging the MMR merger were filed on behalf of MMR stockholders. Nine were filed in the Court of Chancery of the State of Delaware. On January 25, 2013, the Court of Chancery consolidated the actions into a single action, In Re McMoRan Exploration Co. Stockholder Litigation, No. 8132-VCN. On June 28, 2013, the parties entered into a settlement agreement, and on October 11, 2013, the court held a hearing to consider the evidence in support of the proposed settlement. On October 16, 2013, the court entered an order approving the settlement, the terms of which were not material to FCX. One action was also filed in the Civil District Court for the Parish of Orleans of the State of Louisiana: Langley v. Moffett et al., No. 2012-11904, filed December 19, 2012. On April 19, 2013, the Louisiana Civil District Court granted defendants' motion to stay the action pending the resolution of the consolidated action brought by MMR stockholders in the Delaware Court of Chancery. As a result of the settlement of the consolidated Delaware action, the Louisiana action will be dismissed. Each of the actions names some or all of the following as defendants, in addition to MMR and its directors: FCX, two FCX subsidiaries, the Gulf Coast Ultra Deep Royalty Trust and PXP. The actions alleged that MMR's directors breached their fiduciary duties because they, among other things, pursued their own interests at the expense of stockholders and failed to maximize stockholder value with respect to the merger, and that PXP, FCX, or both, aided and abetted the breach of fiduciary duty by MMR's directors. The Delaware action also asserted claims derivatively on behalf of MMR. The actions sought, among other things, injunctive relief barring or rescinding the MMR merger, damages, and attorneys' fees and costs.
	Kay County Litigation. On May 23, 2012, the Board of Commissioners of Kay County, Oklahoma, filed suit in Oklahoma District Court against FCX and several affiliates, including Blackwell Zinc Company, Inc. (BZC), an indirect subsidiary of FCX that owned and operated a zinc smelter in Blackwell, Oklahoma, from 1916 to 1974, entitled Board of Commissioners of the County of Kay, Oklahoma v. Freeport-McMoRan Copper & Gold Inc., et al., United States District Court, Western District of Oklahoma, Case No. 5:12-cv-00601-C. The suit alleged that BZC permitted large quantities of smelter waste to be used as road building and fill material throughout Kay County over a period of decades and sought unspecified financial assistance for removing or covering much of the material and unspecified damages for the alleged public nuisance created by the presence of the material. On November 25, 2013, the case was settled for an amount that is not material to FCX.
	Tax and Other Matters. Cerro Verde Royalty Dispute. SUNAT, the Peruvian national tax authority, has assessed mining royalties on ore processed by the Cerro Verde concentrator, which commenced operations in late 2006. These assessments cover the period October 2006 to December 2007 and the years 2008 and 2009. In July 2013, the Peruvian Tax Tribunal issued two decisions affirming SUNAT's assessments for the period October 2006 through December 2008. Decisions by the Tax Tribunal end the administrative stage of the appeal procedures for the assessments. In September 2013, Cerro Verde filed judiciary appeals related to the assessments because it continues to believe that its 1998 stability agreement exempts all minerals extracted from its mining concession from royalties, irrespective of the method used for processing those minerals. Although FCX believes its interpretation of the stability agreement is correct, if Cerro Verde is ultimately found responsible for these assessments, it may also be liable for penalties and interest, which accrues at rates that range from approximately 7 percent to 18 percent based on the year accrued and the currency in which the amounts would be payable.
	On October 1, 2013, SUNAT served Cerro Verde with a demand for payment totaling 492 million Peruvian nuevo soles ($176 million based on exchange rates as of December 31, 2013, including interest and penalties of $104 million, or a total of $94 million net of noncontrolling interests) based on the Peruvian Tax Tribunal’s July 2013 decisions for the period October 2006 through December 2008. As permitted by law, Cerro Verde requested and was granted an installment payment program that defers payment for six months and thereafter satisfies the amount via sixty-six equal monthly payments. On July 19, 2013, a hearing on SUNAT's assessment for 2009 was held, but no decision has been issued by the Tax Tribunal for that year. As of December 31, 2013, the aggregate amount of the assessments, including interest and penalties, for the year 2009 was 206 million Peruvian nuevo soles ($74 million based on exchange rates as of December 31, 2013, or a total of $39 million net of noncontrolling interests). SUNAT may make additional assessments for mining royalties and associated penalties and interest for the years 2010 through 2013, which Cerro Verde will contest; FCX believes any such assessments for the years 2010 through 2013, if made, would in the aggregate be similar to the aggregate assessments received for the periods October 2006 through December 2009. No amounts were accrued for these assessments or the installment payment program as of December 31, 2013, because Cerro Verde believes its 1998 stability agreement exempts it from these royalties and believes any payments will be recoverable.
	Indonesia Tax Matters. PT-FI has received assessments from the Indonesian tax authorities for additional taxes and interest related to various audit exceptions for income taxes and other taxes as follows:
	Date of Assessment		Tax Year		Tax Assessment				Interest Assessment				Total
	Oct-10		2005		$	103			$	49			$	152
	Nov-11		2006		22				10				32
	Mar-12		2007		91				44				135
First-quarter 2013		2008		62				52				114
Second-quarter 2013		2011		56				13				69
Total				$	334			$	168			$	502
PT-FI has filed objections to the assessments because it believes it has properly determined and paid its taxes. During 2013, the Indonesian tax authorities agreed to refund $291 million ($320 million was included in income taxes receivable in the consolidated balance sheet at December 31, 2012) associated with income tax overpayments made by PT-FI for 2011. PT-FI received a cash refund of $165 million in July 2013, and the Indonesian tax authorities withheld $126 million of the 2011 overpayment for unrelated assessments from 2005 and 2007, which PT-FI is disputing. PT-FI filed objections for $22 million of the remaining 2011 overpayments that it believes it is due. As of December 31, 2013, PT-FI had $255 million included in other assets for amounts paid on disputed tax assessments, which it believes are collectible, including the $126 million discussed above for the 2011 refunds.
In December 2009, PT-FI was notified by the Large Taxpayer's Office of the Government of Indonesia of its view that PT-FI is obligated to pay value added taxes on certain goods imported after the year 2000. The amount of such taxes and related penalties under this view would be significant. PT-FI believes that, pursuant to the terms of its Contract of Work, it is only required to pay value added taxes on these types of goods imported after December 30, 2009. PT-FI has not received a formal assessment and is working with the applicable government authorities to resolve this matter.
Columbian Chemicals Company (Columbian) Claims. In July 2012, FCX and Columbian (formerly a subsidiary of FMC) reached an agreement regarding the extent of FCX’s indemnity obligations under the 2005 agreement pursuant to which Columbian was sold. Under the agreement, FCX's remaining possible exposure, net of amounts reserved or paid, totaled $107 million at December 31, 2013.
Letters of Credit, Bank Guarantees and Surety Bonds.  Letters of credit and bank guarantees totaled $326 million at December 31, 2013, primarily for the Cerro Verde royalty dispute (bank guarantee secured by a time deposit - refer to discussion above), environmental and asset retirement obligations, workers’ compensation insurance programs, tax and customs obligations, and other commercial obligations. In addition, FCX had surety bonds totaling $331 million at December 31, 2013, associated with environmental and asset retirement obligations ($268 million), self-insurance bonds primarily for workers’ compensation ($21 million) and other bonds ($42 million).
Insurance.  FCX purchases a variety of insurance products to mitigate potential losses. The various insurance products typically have specified deductible amounts or self-insured retentions and policy limits. FCX generally is self-insured for U.S. workers’ compensation, but purchases excess insurance up to statutory limits. An actuarial analysis is performed twice a year on the various casualty insurance programs covering FCX's U.S. based mining operations, including workers’ compensation, to estimate expected losses. At December 31, 2013, expected losses under these insurance programs totaled $52 million, which consisted of a current portion of $8 million (included in accounts payable and accrued liabilities) and a long-term portion of $44 million (included in other liabilities).
FCX's oil and gas operations are subject to all of the risks normally incident to the exploration for and the production of oil and gas, including well blowouts, cratering, explosions, oil spills, releases of gas or well fluids, fires, pollution and releases of toxic gas, each of which could result in damage to or destruction of oil and gas wells, production facilities or other property or injury to persons. Although FCX maintains insurance coverage considered to be customary in the oil and gas industry, FCX is not fully insured against all risks either because insurance is not available or because of high premium costs. FCX is self-insured for named windstorms in the GOM. FCX's insurance policies provide limited coverage for losses or liabilities relating to pollution, with broader coverage for sudden and accidental occurrences.
FCX and its insurers entered into an agreement in December 2012 to settle an insurance claim for business interruption and property damage relating to the 2011 incidents affecting PT-FI's concentrate pipelines. The insurers agreed to pay an aggregate of $63 million, including PT-FI's joint venture partner's share. As a result of the settlement, FCX recorded a gain of $59 million in 2012.

COMMITMENTS_AND_GUARANTEES

COMMITMENTS AND GUARANTEES	12 Months Ended
	Dec. 31, 2013
Commitments and Guarantees [Abstract]	'
Commitments and Guarantees	'
	COMMITMENTS AND GUARANTEES
	Operating Leases.  FCX leases various types of properties, including offices, aircraft and equipment. Future minimum rentals under non-cancelable leases at December 31, 2013, total $45 million in 2014, $42 million in 2015, $42 million in 2016, $40 million in 2017, $35 million in 2018 and $132 million thereafter. Minimum payments under operating leases have not been reduced by aggregate minimum sublease rentals, which are minimal. Total aggregate rental expense under operating leases was $96 million in 2013, $77 million in 2012 and $70 million in 2011.
	Contractual Obligations.  Based on applicable prices at December 31, 2013, FCX has unconditional purchase obligations of $4.7 billion, primarily comprising minimum commitments for two deepwater drillships currently under construction and expected to be delivered in late 2014 and early 2015 for the GOM drilling campaign ($1.5 billion), transportation services ($853 million), the procurement of copper concentrates ($800 million), electricity ($471 million) and deferred premium costs and future interest expected to be accrued on crude oil derivative contracts ($454 million), which is expected to be paid once the options settle (refer to Note 14 for further discussion of the amounts recorded at December 31, 2013). Some of FCX’s unconditional purchase obligations are settled based on the prevailing market rate for the service or commodity purchased. In some cases, the amount of the actual obligation may change over time because of market conditions. Drillship obligations provide for an operating rate over the contractual term upon delivery of the drillship. Transportation obligations are primarily for South America and PT-FI contracted ocean freight. Obligations for copper concentrates provide for deliveries of specified volumes to Atlantic Copper at market-based prices. Electricity obligations are primarily for contractual minimum demand at the South America and Tenke mines.
	FCX’s future commitments associated with unconditional purchase obligations total $1.4 billion in 2014, $1.3 billion in 2015, $863 million in 2016, $686 million in 2017, $142 million in 2018 and $327 million thereafter, of which $444 million was accrued at December 31, 2013, related to deferred premiums and interest on crude oil derivative contracts. During the three-year period ended December 31, 2013, FCX fulfilled its minimum contractual purchase obligations or negotiated settlements in those situations in which it terminated an agreement containing an unconditional obligation.
	Mining Contracts — Indonesia. FCX is entitled to mine in Indonesia under the Contract of Work between PT-FI and the Government of Indonesia. The original Contract of Work was entered into in 1967 and was replaced with a new Contract of Work in 1991. The initial term of the current Contract of Work expires in 2021 but can be extended by PT-FI for two 10-year periods subject to Indonesian government approval, which pursuant to the Contract of Work cannot be withheld or delayed unreasonably. Given the importance of contracts of work and PT-FI’s over 40 years of working with the Indonesian government, which included entering into the Contract of Work in 1991 well before the expiration of the 1967 Contract of Work, PT-FI expects that the government will approve the extensions as long as it continues to comply with the terms of the Contract of Work.
	In July 2004, FCX received a request from the Indonesian Department of Energy and Mineral Resources that it offer to sell shares in PT Indocopper Investama to Indonesian nationals at fair market value. In response to this request and in view of the potential benefits of having additional Indonesian ownership in the operations, FCX agreed, at the time, to consider a potential sale of an interest in PT Indocopper Investama at fair market value. Neither its Contract of Work nor Indonesian law requires FCX to divest any portion of its ownership in PT-FI or PT Indocopper Investama. In May 2008, FCX signed a Memorandum of Understanding with the Papua provincial government (the Province) whereby the parties agreed to work cooperatively to determine the feasibility of an acquisition by the Province of the PT Indocopper Investama shares at market value. PT-FI is currently engaged in discussions with the Indonesian government related to its Contract of Work and intends to conclude that process before proceeding with any further discussions about the potential sale of an interest in PT Indocopper Investama.
	The copper royalty rate payable by PT-FI under its Contract of Work varies from 1.5 percent of copper net revenue at a copper price of $0.90 or less per pound to 3.5 percent at a copper price of $1.10 or more per pound. The Contract of Work royalty rate for gold and silver sales is at a fixed rate of 1.0 percent.
	A large part of the mineral royalties under Indonesian government regulations is designated to the provinces from which the minerals are extracted. In connection with its fourth concentrator mill expansion completed in 1998, PT-FI agreed to pay the Government of Indonesia additional royalties (royalties not required by the Contract of Work) to provide further support to the local governments and the people of the Indonesian province of Papua. The additional royalties are paid on production exceeding specified annual amounts of copper, gold and silver expected to be generated when PT-FI’s milling facilities operate above 200,000 metric tons of ore per day. The additional royalty for copper equals the Contract of Work royalty rate, and for gold and silver equals twice the Contract of Work royalty rates. Therefore, PT-FI’s royalty rate on copper net revenues from production above the agreed levels is double the Contract of Work royalty rate, and the royalty rates on gold and silver sales from production above the agreed levels are triple the Contract of Work royalty rates.
	The combined royalties, including the additional royalties that became effective January 1, 1999, totaled $109 million in 2013, $93 million in 2012 and $137 million in 2011.
	In 2009, Indonesia enacted a mining law (2009 Mining Law), which operates under a licensing system that is less protective of licensees than the contract of work system that governs PT-FI. The 2009 Mining Law and the regulations issued pursuant to that law provide that contracts of work would continue to be honored until their expiration. However, the regulations, including those issued in January 2014, attempt to apply certain provisions of the 2009 Mining Law and regulations to existing contracts of work and seek to apply the licensing system to any extension periods of contracts of work.
	In January 2012, the President of Indonesia issued a decree calling for the creation of a team of Ministers to evaluate contracts of work for adjustment to the 2009 Mining Law and to take steps to assess and determine the Indonesian government's position on reduction to the size of contract concessions, increasing government revenues and domestic processing of minerals. FCX has been engaged in discussions with officials of the Indonesian government to complete this evaluation process and obtain an extension of the PT-FI Contract of Work beyond its primary term ending in 2021 to 2041, as provided under the terms of the Contract of Work, which can only be modified by mutual agreement between PT-FI and the Indonesian government.
	In January 2014, the Indonesian government published regulations providing that holders of contracts of work with existing processing facilities in Indonesia may continue to export product through January 12, 2017, but established new requirements for the continued export of copper concentrates, including the imposition of a progressive export duty on copper concentrates in the amount of 25 percent in 2014, rising to 60 percent by mid-2016. PT-FI’s Contract of Work authorizes it to export concentrates and specifies the taxes and other fiscal terms available to its operations. The Contract of Work states that PT-FI shall not be subject to taxes, duties or fees subsequently imposed or approved by the Indonesian government except as expressly provided in the Contract of Work. Additionally, PT-FI complied with the requirements of its Contract of Work for local processing by arranging for the construction and commissioning of Indonesia's only copper smelter and refinery, which is owned by PT Smelting (refer to Note 6).
	The January 2014 regulations conflict with PT-FI’s contractual rights under its Contract of Work. FCX is working with the Indonesian government to clarify the situation and to defend PT-FI’s rights under its Contract of Work. PT-FI is also seeking to obtain the required administrative permits for 2014 exports, which have been delayed as a result of the new regulations.
	As of February 21, 2014, PT-FI has not obtained administrative approval for 2014 exports. PT-FI has implemented near-term changes to its operations to coordinate its concentrate production with PT Smelting's operating plans. PT-FI is engaging with the government of Indonesia to reach a resolution that would enable PT-FI to resume normal operations as soon as possible. In the event that PT-FI is unable to resume normal operations for an extended period, FCX plans to consider further actions, including constraining operating costs, deferring capital expenditures and implementing workforce reductions. PT-FI may also be required to declare force majeure under its concentrate sales agreements.
	Mining Contracts — Africa. FCX is entitled to mine in the DRC under an Amended and Restated Mining Convention (ARMC) between TFM and the Government of the DRC. The original Mining Convention was entered into in 1996, was replaced with the ARMC in 2005 and was further amended in 2010 (approved in 2011). The current ARMC will remain in effect for as long as the Tenke concession is exploitable. The royalty rate payable by TFM under the ARMC is two percent of net revenue. These mining royalties totaled $29 million in 2013, $25 million in 2012 and $24 million in 2011.
	Effective March 26, 2012, the DRC government issued a Presidential Decree approving the modifications to TFM's bylaws following a review (completed in 2010) of TFM's existing mining contracts. Among other changes to the amended ARMC, FCX's effective ownership interest in TFM was reduced from 57.75 percent to 56 percent and $50 million of TFM's stockholder loan payable to a subsidiary of FMC was converted to equity.
	Community Development Programs.  FCX has adopted policies that govern its working relationships with the communities where it operates. These policies are designed to guide its practices and programs in a manner that respects basic human rights and the culture of the local people impacted by FCX’s operations. FCX continues to make significant expenditures on community development, education, training and cultural programs.
	In 1996, PT-FI established the Freeport Partnership Fund for Community Development (Partnership Fund) through which PT-FI has made available funding and technical assistance to support community development initiatives in the area of health, education and economic development of the area. PT-FI has committed through 2016 to provide one percent of its annual revenue for the development of the local people in its area of operations through the Partnership Fund. PT-FI charged $41 million in 2013, $39 million in 2012 and $50 million in 2011 to cost of sales for this commitment.
	TFM has committed to assist the communities living within its concession in the Katanga province of the DRC. TFM will contribute 0.3 percent of net sales revenue from production to a community development fund to assist the local communities with development of local infrastructure and related services, such as those pertaining to health, education and economic development. TFM charged $4 million in each of the years 2013, 2012 and 2011 to cost of sales for this commitment.
	Guarantees.  FCX provides certain financial guarantees (including indirect guarantees of the indebtedness of others) and indemnities.
	At its Morenci mine in Arizona, FCX has a venture agreement with Sumitomo, which includes a put and call option guarantee clause. FCX holds an 85 percent undivided interest in the Morenci complex. Under certain conditions defined in the venture agreement, Sumitomo has the right to sell its 15 percent share to FCX. Likewise, under certain conditions, FCX has the right to purchase Sumitomo’s share of the venture. At December 31, 2013, the maximum potential payment FCX is obligated to make to Sumitomo upon exercise of the put option (or FCX’s exercise of its call option) totaled approximately $267 million based on calculations defined in the venture agreement. At December 31, 2013, FCX had not recorded any liability in its consolidated financial statements in connection with this guarantee as FCX does not believe, based on information available, that it is probable that any amounts will be paid under this guarantee as the fair value of Sumitomo’s 15 percent share is in excess of the exercise price.
	Prior to its acquisition by FCX, FMC and its subsidiaries have, as part of merger, acquisition, divestiture and other transactions, from time to time, indemnified certain sellers, buyers or other parties related to the transaction from and against certain liabilities associated with conditions in existence (or claims associated with actions taken) prior to the closing date of the transaction. As part of these transactions, FMC indemnified the counterparty from and against certain excluded or retained liabilities existing at the time of sale that would otherwise have been transferred to the party at closing. These indemnity provisions generally now require FCX to indemnify the party against certain liabilities that may arise in the future from the pre-closing activities of FMC for assets sold or purchased. The indemnity classifications include environmental, tax and certain operating liabilities, claims or litigation existing at closing and various excluded liabilities or obligations. Most of these indemnity obligations arise from transactions that closed many years ago, and given the nature of these indemnity obligations, it is not possible to estimate the maximum potential exposure. Except as described in the following sentence, FCX does not consider any of such obligations as having a probable likelihood of payment that is reasonably estimable, and accordingly, has not recorded any obligations associated with these indemnities. With respect to FCX’s environmental indemnity obligations, any expected costs from these guarantees are accrued when potential environmental obligations are considered by management to be probable and the costs can be reasonably estimated.

FINANCIAL_INSTRUMENTS

FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2013
Financial Instruments [Abstract]	'
Financial Instruments	'
	FINANCIAL INSTRUMENTS
	FCX does not purchase, hold or sell derivative financial instruments unless there is an existing asset or obligation, or it anticipates a future activity that is likely to occur and will result in exposure to market risks, which FCX intends to offset or mitigate. FCX does not enter into any derivative financial instruments for speculative purposes, but has entered into derivative financial instruments in limited instances to achieve specific objectives. These objectives principally relate to managing risks associated with commodity price changes, foreign currency exchange rates and interest rates.
	Commodity Contracts.  From time to time, FCX has entered into forward, futures and swap contracts to hedge the market risk associated with fluctuations in the prices of commodities it purchases and sells. As a result of the acquisition of PXP, FCX assumed a variety of crude oil and natural gas commodity derivatives, such as swaps, collars, puts, calls and various combinations of these instruments to hedge the exposure to the volatility of crude oil and natural gas commodity prices. Derivative financial instruments used by FCX to manage its risks do not contain credit risk-related contingent provisions. As of December 31, 2013 and 2012, FCX had no price protection contracts relating to its mine production. A discussion of FCX’s derivative contracts and programs follows.
	Derivatives Designated as Hedging Instruments – Fair Value Hedges
	Copper Futures and Swap Contracts. Some of FCX’s U.S. copper rod customers request a fixed market price instead of the COMEX average copper price in the month of shipment. FCX hedges this price exposure in a manner that allows it to receive the COMEX average price in the month of shipment while the customers pay the fixed price they requested. FCX accomplishes this by entering into copper futures or swap contracts. Hedging gains or losses from these copper futures and swap contracts are recorded in revenues. FCX did not have any significant gains or losses during the three years ended December 31, 2013, resulting from hedge ineffectiveness. At December 31, 2013, FCX held copper futures and swap contracts that qualified for hedge accounting for 44 million pounds at an average contract price of $3.28 per pound, with maturities through November 2014.
	A summary of gains (losses) recognized in revenues for derivative financial instruments related to commodity contracts that are designated and qualify as fair value hedge transactions, along with the unrealized gains (losses) on the related hedged item (firm sales commitments) for the years ended December 31 follows:
		2013				2012				2011
	Unrealized gains (losses):
	Derivative financial instruments	$	1			$	15			$	(28	)
	Hedged item	(1		)		(15		)		28
	Realized gains (losses):
	Matured derivative financial instruments	(17		)		(2		)		(28		)
	Derivatives Not Designated as Hedging Instruments
	Embedded derivatives and derivative financial instruments that do not meet the criteria to qualify for hedge accounting are discussed below.
	Embedded Derivatives. As described in Note 1 under “Revenue Recognition,” certain FCX copper concentrate, copper cathode and gold sales contracts provide for provisional pricing primarily based on the LME price (copper) or the COMEX price (copper) and the London price (gold) at the time of shipment as specified in the contract. Similarly, FCX purchases copper under contracts that provide for provisional pricing. FCX applies the normal purchases and normal sales scope exception in accordance with derivatives and hedge accounting guidance to the host sales agreements since the contracts do not allow for net settlement and always result in physical delivery. Sales and purchases with a provisional sales price contain an embedded derivative (i.e., the price settlement mechanism is settled after the time of delivery) that is required to be bifurcated from the host contract. The host contract is the sale or purchase of the metals contained in the concentrates or cathodes at the then-current LME or COMEX price (copper) or the London price (gold) as defined in the contract. Mark-to-market price fluctuations recorded through the settlement date are reflected in revenues for sales contracts and in cost of sales as production and delivery costs for purchase contracts.
	A summary of FCX’s embedded derivatives at December 31, 2013, follows:
		Open			Average Price								Maturities
					Per Unit
		Positions			Contract				Market				Through
	Embedded derivatives in provisional sales contracts:
	Copper (millions of pounds)	673			$	3.24			$	3.34			Jun-14
	Gold (thousands of ounces)	254			1,245				1,202				Apr-14
	Embedded derivatives in provisional purchase contracts:
	Copper (millions of pounds)	60			3.26				3.34				Apr-14
	Crude Oil and Natural Gas Contracts. As a result of the acquisition of PXP, FCX assumed PXP's 2013, 2014 and 2015 derivative instruments that consisted of crude oil options, and crude oil and natural gas swaps. The crude oil and natural gas derivatives are not designated as hedging instruments and are recorded at fair value with the mark-to-market gains and losses recorded in revenues.
	The crude oil options were entered into by PXP to protect the realized price of a portion of expected future sales in order to limit the effects of crude oil price decreases. At December 31, 2013, these contracts are composed of crude oil put spreads consisting of put options with a floor limit. The premiums associated with put options are deferred until the settlement period. At December 31, 2013, the deferred option premiums and accrued interest associated with the crude oil option contracts totaled $444 million, which was included as a component of the fair value of the crude oil option contracts. At December 31, 2013, the outstanding crude oil option contracts, all of which settle monthly, follow:
								Average Price (per barrel)a
	Period		Instrument Type		Daily Volumes (thousand barrels)			Floor				Floor Limit			Average Deferred Premium		Index
															(per barrel)
	2014
	Jan - Dec		Put optionsb		75			$	90			$	70		$	5.74	Brent
	Jan - Dec		Put optionsb		30			95				75			6.09		Brent
	Jan - Dec		Put optionsb		5			100				80			7.11		Brent
	2015
	Jan - Dec		Put optionsb		84			90				70			6.89		Brent
	a.	The average strike prices do not reflect any premiums to purchase the put options.
	b.	If the index price is less than the per barrel floor, FCX receives the difference between the per barrel floor and the index price up to a maximum of $20 per barrel less the option premium. If the index price is at or above the per barrel floor, FCX pays the option premium and no cash settlement is received.
	In addition, at December 31, 2013, outstanding natural gas swaps with a weighted-average fixed swap price of $4.09 per million British thermal units (MMBtu) cover approximately 37 million MMBtu of natural gas with maturities through December 2014 (on daily volumes of 100,000 MMBtu). If the Henry Hub index price is less than the fixed price, FCX receives the difference between the fixed price and the Henry Hub index price. FCX pays the difference between the index price and the fixed price if the Henry Hub index price is greater than the fixed price.
	Copper Forward Contracts. Atlantic Copper, FCX's wholly owned smelting and refining unit in Spain, enters into forward copper contracts designed to hedge its copper price risk whenever its physical purchases and sales pricing periods do not match. These economic hedge transactions are intended to hedge against changes in copper prices, with the mark-to-market hedging gains or losses recorded in cost of sales. At December 31, 2013, Atlantic Copper held net forward copper sales contracts for 10 million pounds at an average contract price of $3.27 per pound, with maturities through February 2014.
	Summary of Gains (Losses). A summary of the realized and unrealized gains (losses) recognized in income before income taxes and equity in affiliated companies’ net earnings for commodity contracts that do not qualify as hedge transactions, including embedded derivatives, for the years ended December 31 follows:
		2013				2012					2011
	Embedded derivatives in provisional copper and gold
	sales contractsa	$	(136	)		$	77				$	(519	)
	Crude oil optionsa	(344		)		—					—
	Natural gas swapsa	10				—			—		—
	Copper forward contractsb	3				15					(2		)
	a.	Amounts recorded in revenues.
	b.	Amounts recorded in cost of sales as production and delivery costs.
	Unsettled Derivative Financial Instruments
	A summary of the fair values of unsettled commodity derivative financial instruments follows:
		December 31,
		2013				2012
	Commodity Derivative Assets:
	Derivatives designated as hedging instruments:
	Copper futures and swap contractsa	$	6			$	5
	Derivatives not designated as hedging instruments:
	Embedded derivatives in provisional copper and gold
	sales/purchase contracts	63				36
	Total derivative assets	$	69			$	41
	Commodity Derivative Liabilities:
	Derivatives designated as hedging instruments:
	Copper futures and swap contractsa	$	—			$	1
	Derivatives not designated as hedging instruments:
Embedded derivatives in provisional copper and gold
sales/purchase contracts	16				27
Crude oil optionsb	309				—
Natural gas swaps	4				—
Copper forward contracts	1				—
Total derivative liabilities	$	330			$	28
a.	FCX had paid $1 million to brokers at December 31, 2013, and $7 million at December 31, 2012, for margin requirements (recorded in other current assets).
b.	Included $444 million for deferred premiums and accrued interest at December 31, 2013.
FCX's commodity contracts have netting arrangements with counterparties with which the right of offset exists, and it is FCX's policy to offset balances by counterparty on the balance sheet. FCX's embedded derivatives on provisional sales/purchases are netted with the corresponding outstanding receivable/payable balances. A summary of these unsettled commodity contracts that are offset in the balance sheet follows:
		Assets								Liabilities
		December 31, 2013				December 31, 2012				December 31, 2013			December 31, 2012
Gross amounts recognized:
Commodity contracts:
Embedded derivatives on provisional
sales/purchase contracts		$	63			$	36			$	16		$	27
Crude oil and natural gas derivatives		—				—				313			—
Copper derivatives		6				5				1			1
		69				41				330			28
Less gross amounts of offset:
Commodity contracts:
Embedded derivatives on provisional
sales/purchase contracts		10				8				10			8
Crude oil and natural gas derivatives		—				—				—			—
Copper derivatives		—				—				—			—
		10				8				10			8
Net amounts presented in balance sheet:
Commodity contracts:
Embedded derivatives on provisional
sales/purchase contracts		53				28				6			19
Crude oil and natural gas derivatives		—				—				313			—
Copper derivatives		6				5				1			1
		$	59			$	33			$	320		$	20
Balance sheet classification:
Trade accounts receivable		$	53			$	24			$	—		$	9
Other current assets		6				5				—			—
Accounts payable and accrued liabilities		—				4				205			11
Other liabilities		—				—				115			—
		$	59			$	33			$	320		$	20
Credit Risk.  FCX is exposed to credit loss when financial institutions with which FCX has entered into derivative transactions (commodity, foreign exchange and interest rate swaps) are unable to pay. To minimize the risk of such losses, FCX uses counterparties that meet certain credit requirements and periodically reviews the creditworthiness of these counterparties. FCX does not anticipate that any of the counterparties it deals with will default on their obligations. As of December 31, 2013, the maximum amount of credit exposure associated with derivative transactions was $54 million.
Other Financial Instruments.  Other financial instruments include cash and cash equivalents, accounts receivable, investment securities, trust assets, accounts payable and accrued liabilities, dividends payable and long-term debt. The carrying value for cash and cash equivalents (which included time deposits of $211 million at December 31, 2013, and $514 million at December 31, 2012), accounts receivable, accounts payable and accrued liabilities, and dividends payable approximates fair value because of their short-term nature and generally negligible credit losses (refer to Note 15 for the fair values of investment securities, trust assets and long-term debt).
In addition, FCX has non-detachable warrants, which are considered to be embedded derivative instruments, associated with the Plains Offshore Preferred Stock (refer to Note 2 for further discussion and Note 15 for the fair value of these instruments).

FAIR_VALUE_MEASUREMENT

FAIR VALUE MEASUREMENT	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	FAIR VALUE MEASUREMENT
	Fair value accounting guidance includes a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 inputs) and the lowest priority to unobservable inputs (Level 3 inputs).
	Level 1	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2	Quoted prices in markets that are not active, quoted prices for similar assets or liabilities in active markets, inputs other than quoted prices that are observable for the asset or liability, or inputs that are derived principally from or corroborated by observable market data by correlation or other means; and
	Level 3	Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity).
	FCX recognizes transfers between levels at the end of the reporting period. FCX did not have any significant transfers in or out of Level 1, 2 or 3 for 2013. A summary of the carrying amount and fair value of FCX’s financial instruments other than cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities, and dividends payable follows:
		At December 31, 2013
		Carrying				Fair Value
		Amount				Total				Level 1		Level 2		Level 3
	Assets
	Investment securities (current and long-term):a,b
	U.S. core fixed income fund	$	21			$	21			$	—	$	21	$	—
	Money market funds	18				18				18		—		—
	Equity securities	5				5				5		—		—
	Total	44				44				23		21		—
	Legally restricted funds (long-term):a,b,c
	U.S. core fixed income fund	48				48				—		48		—
	Government mortgage-backed securities	34				34				—		34		—
	Corporate bonds	28				28				—		28		—
	Government bonds and notes	28				28				—		28		—
	Money market funds	28				28				28		—		—
	Asset-backed securities	15				15				—		15		—
	Municipal bonds	1				1				—		1		—
	Total	182				182				28		154		—
	Derivatives:a,d
	Embedded derivatives in provisional sales/purchase
	contracts in a gross asset position	63				63				—		63		—
	Copper futures and swap contracts	6				6				5		1		—
	Total	69				69				5		64		—
	Total assets					$	295			$	56	$	239	$	—
	Liabilities
	Derivatives:a
	Embedded derivatives in provisional sales/purchase
	contracts in a gross liability positiond	$	16			$	16			$	—	$	16	$	—
	Crude oil optionsd	309				309				—		—		309
	Natural gas swaps	4				4				—		4		—
	Copper forward contractsd	1				1				1		—		—
	Plains Offshore warrantse	2				2				—		—		2
	Total	332				332				1		20		311
	Long-term debt, including current portionf	20,706				20,487				—		20,487		—
	Total liabilities					$	20,819			$	1	$	20,507	$	311
		At December 31, 2012
		Carrying				Fair Value
		Amount				Total				Level 1		Level 2		Level 3
	Assets
	Investment securities (current and long-term):
	MMR investmentg	$	446			$	539			$	—	$	539	$	—
	U.S. core fixed income funda,b	22				22				—		22		—
	Money market fundsa,b	16				16				16		—		—
	Equity securitiesa,b	8				8				8		—		—
	Total	492				585				24		561		—
	Legally restricted funds (long-term):a,b
	U.S. core fixed income fund	50				50				—		50		—
	Government mortgage-backed securities	36				36				—		36		—
	Corporate bonds	30				30				—		30		—
	Government bonds and notes	24				24				—		24		—
	Asset-backed securities	15				15				—		15		—
	Money market funds	7				7				7		—		—
	Municipal bonds	1				1				—		1		—
	Total	163				163				7		156		—
	Derivatives:a,d
	Embedded derivatives in provisional sales/purchase
	contracts in a gross asset position	36				36				—		36		—
Copper futures and swap contracts	5				5				5		—		—
Total	41				41				5		36		—
Total assets					$	789			$	36	$	753	$	—
Liabilities
Derivatives:a,d
Embedded derivatives in provisional sales/purchase
contracts in a gross liability position	$	27			$	27			$	—	$	27	$	—
Copper futures and swap contracts	1				1				1		—		—
Total	28				28				1		27		—
Long-term debt, including current portionf	3,527				3,589				—		3,589		—
Total liabilities					$	3,617			$	1	$	3,616	$	—
a.	Recorded at fair value.
b.	Current portion included in other current assets and long-term portion included in other assets.
c.	Legally restricted funds excluded $210 million of time deposits (which approximated fair value) at December 31, 2013, associated with the Cerro Verde royalty dispute (refer to Note 12 for further discussion).
d.	Refer to Note 14 for further discussion and balance sheet classifications. At December 31, 2013, crude oil options are net of $444 million for deferred premiums and accrued interest.
e.	Included in other liabilities. Refer to Note 2 for further discussion.
f.	Recorded at cost except for debt assumed in the PXP and FMC acquisitions, which were recorded at fair value at the respective acquisition dates.
g.	Recorded at cost and included in other assets.
Valuation Techniques
Money market funds are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices in active markets.
Fixed income securities (U.S. core fixed income funds, government securities, corporate bonds, asset-backed securities and municipal bonds) are valued using a bid evaluation price or a mid-evaluation price. A bid evaluation price is an estimated price at which a dealer would pay for a security. A mid-evaluation price is the average of the estimated price at which a dealer would sell a security and the estimated price at which a dealer would pay for a security. These evaluations are based on quoted prices, if available, or models that use observable inputs and, as such, are classified within Level 2 of the fair value hierarchy.
Equity securities are valued at the closing price reported on the active market on which the individual securities are traded and, as such, are classified within Level 1 of the fair value hierarchy.
FCX’s embedded derivatives on provisional copper concentrate, copper cathode and gold purchases and sales have critical observable inputs of quoted monthly LME or COMEX copper forward prices and the London gold forward price at each reporting date based on the month of maturity; however, FCX's contracts themselves are not traded on an exchange. As a result, these derivatives are classified within Level 2 of the fair value hierarchy.
FCX's derivative financial instruments for crude oil options are valued using an option pricing model, which uses various observable inputs including IntercontinentalExchange, Inc. (ICE) crude oil prices, volatilities, interest rates and contract terms. FCX's derivative financial instruments for natural gas swaps are valued using a pricing model that has various observable inputs including NYMEX price quotations, interest rates and contract terms. Valuations are adjusted for credit quality, using the counterparties' credit quality for asset balances and FCX's credit quality for liability balances. For asset balances, FCX uses the credit default swap value for counterparties when available or the spread between the risk-free interest rate and the yield rate on the counterparties' publicly traded debt for similar instruments (which considers the impact of netting agreements on counterparty credit risk, including whether the position with the counterparty is a net asset or net liability). The 2014 natural gas swaps are classified within Level 2 of the fair value hierarchy because the inputs used in the valuation models are directly or indirectly observable for substantially the full term of the instruments. The 2014 and 2015 crude oil options are classified within Level 3 of the fair value hierarchy because the inputs used in the valuation models are not observable for substantially the full term of the instruments. The significant unobservable inputs used in the fair value measurement of the crude oil options are implied volatilities and deferred premiums. Significant increases (decreases) in implied volatilities in isolation would result in a significantly higher (lower) fair value measurement. The implied volatilities ranged from 17 percent to 45 percent, with a weighted average of 23 percent. The deferred premiums ranged from $5.15 per barrel to $7.22 per barrel, with a weighted average of $6.33 per barrel. Refer to Note 14 for further discussion of these derivative financial instruments.
FCX’s derivative financial instruments for copper futures and swap contracts and copper forward contracts that are traded on the respective exchanges are classified within Level 1 of the fair value hierarchy because they are valued using quoted monthly COMEX or LME prices at each reporting date based on the month of maturity (refer to Note 14 for further discussion). Certain of these contracts are traded on the over-the-counter market and are classified within Level 2 of the fair value hierarchy based on COMEX and LME forward prices.
The fair value of warrants associated with the Plains Offshore Preferred Stock was determined with an option pricing model that used unobservable inputs. The inputs used in the valuation model are the estimated fair value of the underlying Plains Offshore common stock, expected exercise price, expected term, expected volatility and risk-free interest rate. The assumptions used in the valuation model are highly subjective because the common stock of Plains Offshore is not publicly traded. As a result, these warrants are classified within Level 3 of the fair value hierarchy. Refer to Note 2 for further discussion of the Plains Offshore warrants.
Long-term debt, including current portion, is not actively traded and is valued using prices obtained from a readily available pricing source and, as such, is classified within Level 2 of the fair value hierarchy.
At December 31, 2012, FCX's investment in MMR's 5.75% Convertible Perpetual Preferred Stock, Series 2 (MMR investment) was not actively traded; therefore, FCX valued it's MMR investment based on a pricing simulation model that used the quoted market prices of MMR's publicly traded common stock as the most significant observable input and other inputs, such as expected volatility, expected settlement date, and risk-free interest rate. Therefore, this investment was classified within Level 2 of the fair value hierarchy. FCX's shares of MMR's 5.75% Convertible Perpetual Preferred Stock, Series 2 were canceled in connection with the acquisition of MMR.
A summary of the changes in the fair value of FCX's Level 3 instruments follows:
	Crude Oil				Plains Offshore
	Options				Warrants
Fair value at December 31, 2012	$	—			$	—
Derivative financial instruments assumed in the PXP acquisition	(83		)		(10		)
Net realized losses	(38		)	a	—
Net unrealized (losses) gains included in earnings related to	(230		)	b	8			c
assets and liabilities still held at the end of the period
Settlement payments	42				—
Fair value at December 31, 2013	$	(309	)		$	(2	)
a.	Included net realized losses of $37 million recorded in revenues and $1 million of interest expense associated with the deferred premiums for the seven month period from June 1, 2013, to December 31, 2013.
b.	Included unrealized losses of $228 million recorded in revenues and $2 million of interest expense associated with the deferred premiums.
c.	Recorded in other (expense) income, net.
The techniques described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while FCX believes its valuation techniques are appropriate and consistent with other market participants, the use of different techniques or assumptions to determine fair value of certain financial instruments could result in a different fair value measurement at the reporting date. There have been no changes in the techniques used at December 31, 2013.
Refer to Note 2 for the levels within the fair value hierarchy associated with other assets acquired, liabilities assumed and redeemable noncontrolling interest related to second-quarter 2013 acquisitions.

BUSINESS_SEGMENTS

BUSINESS SEGMENTS	12 Months Ended
	Dec. 31, 2013
Business Segments [Abstract]	'
Business Segments	'
	BUSINESS SEGMENTS
	Subsequent to the acquisitions of PXP and MMR, FCX has organized its operations into six primary divisions – North America copper mines, South America mining, Indonesia mining, Africa mining, Molybdenum mines and U.S. oil and gas operations. Notwithstanding this structure, FCX internally reports information on a mine-by-mine basis for its mining operations. Therefore, FCX concluded that its operating segments include individual mines or operations relative to its mining operations. For oil and gas operations, FCX determines its operating segments on a country-by-country basis. Operating segments that meet certain financial thresholds are reportable segments.
	Beginning in 2013, the Molybdenum operations division was revised to report only FCX's two molybdenum mines in North America - the Henderson underground mine and the Climax open-pit mine, both in Colorado - as a division (i.e. Molybdenum mines). The molybdenum sales company and related conversion facilities are included with Other Mining & Eliminations in the following segment tables. FCX revised its segment disclosures for the years ended December 31, 2012 and 2011, to conform with the current year presentation.
	Intersegment Sales. Intersegment sales between FCX’s mining operations are based on similar arms-length transactions with third parties at the time of the sale. Intersegment sales may not be reflective of the actual prices ultimately realized because of a variety of factors, including additional processing, timing of sales to unaffiliated customers and transportation premiums.
	FCX defers recognizing profits on sales from its mining operations to other divisions, including Atlantic Copper and on 25 percent of PT-FI's sales to PT Smelting until final sales to third parties occur. Quarterly variations in ore grades, the timing of intercompany shipments and changes in product prices result in variability in FCX's net deferred profits and quarterly earnings.
	Allocations. FCX allocates certain operating costs, expenses and capital expenditures to its operating divisions and individual segments. However, not all costs and expenses applicable to an operation are allocated. U.S. federal and state income taxes are recorded and managed at the corporate level, whereas foreign income taxes are recorded and managed at the applicable country level. In addition, most mining exploration and research activities are managed at the corporate level, and those costs along with some selling, general and administrative costs are not allocated to the operating divisions or individual segments. Accordingly, the following segment information reflects management determinations that may not be indicative of what the actual financial performance of each operating division or segment would be if it was an independent entity.
	North America Copper Mines.  FCX has seven operating copper mines in North America – Morenci, Bagdad, Safford, Sierrita and Miami in Arizona, and Tyrone and Chino in New Mexico. The North America copper mines include open-pit mining, sulfide ore concentrating, leaching and SX/EW operations. A majority of the copper produced at the North America copper mines is cast into copper rod by FCX’s Rod & Refining operations. The North America copper mines include the Morenci copper mine as a reportable segment. In addition to copper, certain of FCX's North America copper mines also produce molybdenum concentrates.
	Morenci. The Morenci open-pit mine, located in southeastern Arizona, produces copper cathodes and copper concentrates. In addition to copper, the Morenci mine also produces molybdenum concentrates. The Morenci mine produced 39 percent of FCX’s North America copper during 2013.
	South America Mining.  South America mining includes four operating copper mines – Cerro Verde in Peru, and El Abra, Candelaria and Ojos del Salado in Chile. These operations include open-pit and underground mining, sulfide ore concentrating, leaching and SX/EW operations. South America mining includes the Cerro Verde and Candelaria copper mines as reportable segments.
	Cerro Verde. The Cerro Verde open-pit copper mine, located near Arequipa, Peru, produces copper cathodes and copper concentrates. In addition to copper, the Cerro Verde mine also produces molybdenum concentrates. The Cerro Verde mine produced 42 percent of FCX’s South America copper during 2013.
	Candelaria. The Candelaria open-pit copper mine, located near Copiapó, Chile, produces copper concentrates. In addition to copper, the Candelaria mine also produces gold and silver. The Candelaria mine produced 28 percent of FCX's South America copper during 2013.
	Indonesia Mining.  Indonesia mining includes PT-FI’s Grasberg minerals district that produces copper concentrates, which contain significant quantities of gold and silver.
	Africa Mining.  Africa mining includes the Tenke minerals district. The Tenke operation includes surface mining, leaching and SX/EW operations and produces copper cathodes. In addition to copper, the Tenke operation produces cobalt hydroxide.
	Molybdenum Mines.  Molybdenum mines include the wholly owned Henderson underground mine and Climax open-pit mine in Colorado. The Henderson and Climax mines produce high-purity, chemical-grade molybdenum concentrates, which are typically further processed into value-added molybdenum chemical products.
	Rod & Refining.  The Rod & Refining segment consists of copper conversion facilities located in North America, and includes a refinery, three rod mills and a specialty copper products facility. These operations process copper produced at FCX’s North America copper mines and purchased copper into copper cathode, rod and custom copper shapes. At times these operations refine copper and produce copper rod and shapes for customers on a toll basis. Toll arrangements require the tolling customer to deliver appropriate copper-bearing material to FCX’s facilities for processing into a product that is returned to the customer, who pays FCX for processing its material into the specified products.
	Atlantic Copper Smelting & Refining.  Atlantic Copper smelts and refines copper concentrates and markets refined copper and precious metals in slimes. During 2013, Atlantic Copper purchased approximately 32 percent of its concentrate requirements from the South America mining operations, approximately 16 percent from the Indonesia mining operations and approximately 13 percent from the North America copper mines at market prices, with the remainder purchased from third parties.
	U.S. Oil & Gas Operations. FCX's U.S. oil and gas operations include oil production facilities and growth potential in the Deepwater GOM, oil production from the onshore Eagle Ford shale play in Texas, oil production facilities onshore and offshore California, onshore natural gas resources in the Haynesville shale play in Louisiana, natural gas production from the Madden area in central Wyoming, and a position in the emerging shallow-water Inboard Lower Tertiary/Cretaceous natural gas trend on the Shelf of the GOM and onshore in South Louisiana. All of the U.S. operations are considered one operating segment.
	Product Revenue
	FCX revenues attributable to the products it produced for the years ended December 31 follow:
		2013				2012			2011
	Refined copper products	$	7,466			$	9,699		$	10,297
	Copper in concentratesa	7,040				4,589			5,938
	Gold	1,656				1,741			2,429
	Molybdenum	1,110				1,187			1,348
	Oil	2,310				—			—
	Other	1,339				794			868
	Total	$	20,921			$	18,010		$	20,880
	a.	Amounts are net of treatment and refining charges totaling $400 million for 2013, $311 million for 2012 and $362 million for 2011.
	Geographic Area
	Information concerning financial data by geographic area follows:
		Years Ended December 31,
		2013				2012			2011
	Revenues:a
	United States	$	9,418			$	6,285		$	7,176
	Japan	2,141				2,181			2,501
	Indonesia	1,651				2,054			2,266
	Spain	1,223				1,581			1,643
	Switzerland	1,098				731			1,219
	China	1,078				579			942
	Chile	754				704			741
	Korea	297				525			561
	Other	3,261				3,370			3,831
	Total	$	20,921			$	18,010		$	20,880
	a.	Revenues are attributed to countries based on the location of the customer.
		December 31,
		2013				2012			2011
	Long-lived assets:a
	United States	$	32,969		b	$	8,689		$	7,899
	Indonesia	5,799				5,127			4,469
	Democratic Republic of Congo	3,994				3,926			3,497
	Peru	5,181				3,933			3,265
	Chile	2,699				2,587			2,242
	Other	562				327			325
	Total	$	51,204			$	24,589		$	21,697
	a.	Long-lived assets exclude deferred tax assets, intangible assets and goodwill.
	b.	Increased primarily because of the PXP and MMR acquisitions.
	Major Customers. Sales to PT Smelting totaled $1.7 billion (8 percent of FCX's consolidated revenues) in 2013, $2.1 billion (11 percent of FCX's consolidated revenues) in 2012 and $2.3 billion (11 percent of FCX's consolidated revenues) in 2011. No other customer accounted for 10 percent or more of FCX's consolidated revenues. Refer to Note 6 for further discussion of FCX’s investment in PT Smelting.
	Labor Matters. As of December 31, 2013, 49 percent of FCX's labor force was covered by collective bargaining agreements, and one percent of FCX's labor force is covered by agreements that will expire within one year.
	Business Segments
	Business segments data for the years ended December 31 are presented in the following tables.
	Business Segments
	(In millions)	Mining Operations
		North America Copper Mines										South America									Indonesia				Africa
																														Atlantic				Other										Corporate,
																										Molyb-				Copper				Mining							U.S.			Other
					Other						Cerro			Candel-		Other										denum		Rod &		Smelting				& Elimi-				Total			Oil & Gas			& Elimi-				FCX
	Morenci				Mines			Total			Verde			aria		Mines		Total		Grasberg				Tenke		Mines		Refining		& Refining				nations				Mining			Operations			nations				Total
Year Ended December 31, 2013
Revenues:
Unaffiliated customers	$	244			$	326		$	570		$	1,473		$	1,155	$	1,224	$	3,852	$	3,751		a	$	1,590	$	—	$	4,995	$	2,027			$	1,516		b	$	18,301		$	2,616	c	$	4			$	20,921
Intersegment	1,673				2,940			4,613			360			273		—		633		336				47		522		27		14				(6,192		)		—			—			—				—
Production and delivery	1,233				2,033			3,266			781			700		588		2,069		2,309				754		317		4,990		2,054				(4,608		)		11,151			682			7				11,840
Depreciation, depletion and amortization	133				269			402			152			69		125		346		247				246		82		9		42				48				1,422			1,364			11				2,797
Selling, general and administrative expenses	2				3			5			3			2		2		7		110				12		—		—		20				29				183			120			354				657
Mining exploration and research expenses	—				5			5			—			—		—		—		1				—		—		—		—				193				199			—			11				210
Environmental obligations and shutdown costs	—				(1		)	(1		)	—			—		—		—		—				—		—		—		—				67				66			—			—				66
Operating income (loss)	549				957			1,506			897			657		509		2,063		1,420				625		123		23		(75		)	d	(405		)		5,280			450			(379		)		5,351
Interest expense, net	3				1			4			2			—		1		3		12				2		—		—		16				80				117			181			220				518
Provision for income taxes	—				—			—			316			236		168		720		603				131		—		—		—				—				1,454			—			21			e	1,475
Total assets at December 31, 2013	3,110				5,810			8,920			6,584			1,545		2,451		10,580		7,437				4,849		2,107		239		1,039				1,003				36,174			26,252			1,047				63,473
Capital expenditures	737				329			1,066			960			110		75		1,145		1,030				205		164		4		67				113				3,794			1,436			56				5,286
Year Ended December 31, 2012
Revenues:
Unaffiliated customers	$	156			$	46		$	202		$	1,767		$	797	$	1,346	$	3,910	$	3,611		a	$	1,349	$	—	$	4,989	$	2,683			$	1,259		b	$	18,003		$	—		$	7			$	18,010
Intersegment	1,846				3,438			5,284			388			430		—		818		310				10		529		27		26				(7,004		)		—			—			—				—
Production and delivery	1,076				1,857			2,933			813			702		599		2,114		2,349				615		320		4,993		2,640				(5,585		)		10,379			—			3				10,382
Depreciation, depletion and amortization	122				238			360			139			32		116		287		212				176		59		9		42				27				1,172			—			7				1,179
Selling, general and administrative expenses	2				2			4			3			1		2		6		121				6		—		—		19				18				174			—			257				431
Mining exploration and research expenses	1				—			1			—			—		—		—		—				—		—		—		—				272				273			—			12				285
Environmental obligations and shutdown costs	(11		)		(5		)	(16		)	—			—		—		—		—				—		—		—		—				(3		)		(19		)	—			(3		)		(22		)
Gain on insurance settlement	—				—			—			—			—		—		—		(59		)		—		—		—		—				—				(59		)	—			—				(59		)
Operating income (loss)	812				1,392			2,204			1,200			492		629		2,321		1,298				562		150		14		8				(474		)		6,083			—			(269		)		5,814
Interest expense, net	1				—			1			7			—		—		7		5				1		—		—		12				81				107			—			79				186
Provision for income taxes	—				—			—			228		f	141		188		557		497				112		—		—		—				—				1,166			—			344				1,510
Total assets at December 31, 2012	2,445				5,703			8,148			5,821			1,853		2,489		10,163		6,591				4,622		2,018		242		992				614				33,390			—			2,050				35,440
Capital expenditures	266				559			825			558			259		114		931		843				539		245		6		16				69				3,474			—			20				3,494
a.	Included PT-FI's sales to PT Smelting totaling $1.7 billion in 2013 and $2.1 billion in 2012.
b.	Included revenues from FCX's molybdenum sales company, which included sales of molybdenum produced by the molybdenum mines and by certain of the North and South America copper mines.
c.	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.
d.	Included $50 million for shutdown costs associated with Atlantic Copper's scheduled 68-day maintenance turnaround, which was completed in fourth-quarter 2013.
e.	Included $199 million of net benefits resulting from oil and gas acquisitions.
f.	Included a credit of $234 million for the reversal of a net deferred tax liability.
(In millions)	Mining Operations
	North America Copper Mines										South America									Indonesia				Africa
																														Atlantic				Other										Corporate,
																										Molyb-				Copper				Mining							U.S.			Other
					Other						Cerro			Candel-		Other										denum		Rod &		Smelting				& Elimi-				Total			Oil & Gas			& Elimi-				FCX
	Morenci				Mines			Total			Verde			aria		Mines		Total		Grasberg				Tenke		Mines		Refining		& Refining				nations				Mining			Operations			nations				Total
Year Ended December 31, 2011
Revenues:
Unaffiliated customers	$	418			$	176		$	594		$	2,115		$	1,265	$	1,192	$	4,572	$	4,504		a	$	1,282	$	—	$	5,523	$	2,969			$	1,428		b	$	20,872		$	—		$	8			$	20,880
Intersegment	1,697				3,338			5,035			417			269		—		686		542				7		595		26		15				(6,906		)		—			—			—				—
Production and delivery	984				1,581			2,565			827			644		434		1,905		1,791				591		259		5,527		2,991				(5,728		)		9,901			—			(3		)		9,898
Depreciation, depletion and amortization	116				162			278			135			28		95		258		215				140		45		8		40				31				1,015			—			7				1,022
Selling, general and administrative expenses	2				2			4			4			1		2		7		124				8		—		—		22				19				184			—			231				415
Mining exploration and research expenses	7				—			7			—			—		—		—		—				—		—		—		—				264				271			—			—				271
Environmental obligations and shutdown costs	4				—			4			—			—		—		—		—				—		—		1		—				129				134			—			—				134
Operating income (loss)	1,002				1,769			2,771			1,566			861		661		3,088		2,916				550		291		13		(69		)		(193		)		9,367			—			(227		)		9,140
Interest expense, net	2				2			4			1			—		—		1		8				6		—		—		15				87				121			—			191				312
Provision for income taxes	—				—			—			553			310		212		1,075		1,256				120		—		—		—				—				2,451			—			636				3,087
Total assets at December 31, 2011	2,006				4,968			6,974			5,110			1,384		2,220		8,714		5,349				3,890		1,819		259		1,109				892				29,006			—			3,064				32,070
Capital expenditures	95				399			494			198			178		227		603		648				193		438		10		32				59				2,477			—			57				2,534
a.	Included PT-FI's sales to PT Smelting totaling $2.3 billion.
b.	Included revenues from FCX's molybdenum sales company, which included sales of molybdenum produced by the molybdenum mines and by certain of the North and South America copper mines.

GUARANTOR_FINANCIAL_STATEMENTS

GUARANTOR FINANCIAL STATEMENTS (Notes)	12 Months Ended
	Dec. 31, 2013
Guarantor Financial Statements [Abstract]	'
Guarantor Financial Statements [Text Block]	'
	GUARANTOR FINANCIAL STATEMENTS
	As further discussed in Note 8, in March 2013, FCX completed the sale of $6.5 billion of senior notes. These notes, along with FCX's senior notes sold in February 2012, are fully and unconditionally guaranteed on a senior basis jointly and severally by FM O&G LLC, as guarantor, which is a 100 percent owned subsidiary of FM O&G and FCX. The guarantee is an unsecured obligation of the guarantor and ranks equal in right of payment with all existing and future indebtedness of FCX, including indebtedness under the revolving credit facility. The guarantee ranks senior in right of payment with all future subordinated obligations and is effectively subordinated in right of payment to any debt of FCX's subsidiaries that are not subsidiary guarantors. In the future, FM O&G LLC's guarantee may be released or terminated under the following circumstances: (i) all or substantially all of the equity interests or assets of FM O&G LLC are sold to a third party; or (ii) FM O&G LLC no longer has any obligations under any FM O&G Senior Notes or any refinancing thereof and no longer guarantees any obligations of FCX under the revolver, the term loan or any other senior debt.
	The following condensed consolidating financial information includes information regarding FCX, as issuer, FM O&G LLC, as guarantor, and all other non-guarantor subsidiaries of FCX. Included are the condensed consolidating balance sheet at December 31, 2013, and the related condensed consolidating statement of comprehensive income for the year ended December 31, 2013, and the condensed consolidating statement of cash flows for the year ended December 31, 2013, which should be read in conjunction with FCX's notes to the consolidated financial statements:
	FREEPORT-McMoRan COPPER & GOLD INC.
	CONDENSED CONSOLIDATING BALANCE SHEET
	31-Dec-13
		FCX				FM O&G LLC			Non-guarantor						Consolidated
		Issuer				Guarantor			Subsidiaries			Eliminations			FCX
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—			$	—		$	1,985		$	—		$	1,985
	Accounts receivable	855				659			2,258			(1,210		)	2,562
	Inventories	—				18			5,000			—			5,018
	Other current assets	114				20			273			—			407
	Total current assets	969				697			9,516			(1,210		)	9,972
	Property, plant, equipment and mining development costs, net	27				43			23,972			—			24,042
	Oil and gas properties, net - full cost method:
	Subject to amortization	—				6,207			6,265			—			12,472
	Not subject to amortization	—				2,649			8,238			—			10,887
	Investment in consolidated subsidiaries	31,162				9,712			12,468			(53,342		)	—
	Goodwill	—				437			1,479			—			1,916
	Other assets	7,126				4,640			4,128			(11,710		)	4,184
	Total assets	$	39,284			$	24,385		$	66,066		$	(66,262	)	$	63,473
	LIABILITIES AND EQUITY
	Current liabilities	$	1,003			$	758		$	4,222		$	(1,210	)	$	4,773
	Long-term debt, less current portion	13,184				7,199			8,056			(8,045		)	20,394
	Deferred income taxes	4,137			a	—			3,273			—			7,410
	Environmental and asset retirement obligations, less current portion	—				301			2,958			—			3,259
	Other liabilities	26				3,436			1,893			(3,665		)	1,690
	Total liabilities	18,350				11,694			20,402			(12,920		)	37,526
	Redeemable noncontrolling interest	—				—			716			—			716
	Equity:
	Stockholders' equity	20,934				12,691			41,100			(53,791		)	20,934
	Noncontrolling interests	—				—			3,848			449			4,297
	Total equity	20,934				12,691			44,948			(53,342		)	25,231
	Total liabilities and equity	$	39,284			$	24,385		$	66,066		$	(66,262	)	$	63,473
	a.	All U.S. related deferred income taxes are recorded at the parent company.
	FREEPORT-McMoRan COPPER & GOLD INC.
	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
	Year Ended December 31, 2013
		FCX				FM O&G LLC			Non-guarantor						Consolidated
		Issuer				Guarantor			Subsidiaries			Eliminations			FCX
	Revenues	$	—			$	1,177		$	19,744		$	—		$	20,921
	Cost of sales	5				976			13,656			—			14,637
	Other operating costs and expenses	129				89			715			—			933
	Total costs and expenses	134				1,065			14,371			—			15,570
	Operating (loss) income	(134		)		112			5,373			—			5,351
	Interest expense, net	(319		)		(129		)	(129		)	59			(518		)
	Losses on early extinguishment of debt	(45		)		—			10			—			(35		)
	Gain on investment in MMR	128				—			—			—			128
	Other income (expense), net	61				—			(15		)	(59		)	(13		)
	(Loss) income before income taxes and equity in affiliated companies' net earnings (losses)	(309		)		(17		)	5,239			—			4,913
	Benefit from (provision for) income taxes	81				17			(1,573		)	—			(1,475		)
	Equity in affiliated companies' net earnings (losses)	2,886				281			268			(3,432		)	3
	Net income (loss)	2,658				281			3,934			(3,432		)	3,441
	Net income and preferred dividends attributable to noncontrolling interests	—				—			(706		)	(77		)	(783		)
	Net income (loss) attributable to FCX common stockholders	$	2,658			$	281		$	3,228		$	(3,509	)	$	2,658
	Other comprehensive income	—				—			101			—			101
	Total comprehensive income (loss)	$	2,658			$	281		$	3,329		$	(3,509	)	$	2,759
	FREEPORT-McMoRan COPPER & GOLD INC.
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	Year Ended December 31, 2013
		FCX				FM O&G LLC			Non-guarantor						Consolidated
	Issuer				Guarantor			Subsidiaries			Eliminations			FCX
Cash flow from operating activities:
Net income (loss)	$	2,658			$	281		$	3,934		$	(3,432	)	$	3,441
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	4				616			2,177			—			2,797
Net losses on crude oil and natural gas derivative contracts	—				334			—			—			334
Gain on investment in MMR	(128		)		—			—			—			(128		)
Equity in earnings of consolidated subsidiaries	(2,886		)		(281		)	(265		)	3,432			—
Other, net	8				(14		)	78			—			72
(Increases) decreases in working capital and changes in other tax payments, excluding amounts from the acquisitions	272				735			(1,384		)	—			(377		)
Net cash (used in) provided by operating activities	(72		)		1,671			4,540			—			6,139
Cash flow from investing activities:
Capital expenditures	—				(894		)	(4,392		)	—			(5,286		)
Acquisitions, net of cash acquired	(5,437		)		—			(4		)	—			(5,441		)
Intercompany loans	834				—			(162		)	(672		)	—
Distributions from consolidated subsidiary	629				—			—			(629		)	—
Other, net	15				30			(226		)	—			(181		)
Net cash used in investing activities	(3,959		)		(864		)	(4,784		)	(1,301		)	(10,908		)
Cash flow from financing activities:
Proceeds from debt	11,260				—			241			—			11,501
Repayments of debt and redemption of MMR preferred stock	(4,737		)		(416		)	(551		)	—			(5,704		)
Intercompany loans	—				(391		)	(281		)	672			—
Cash dividends and distributions paid	(2,281		)		—			(885		)	629			(2,537		)
Other, net	(211		)		—			—			—			(211		)
Net cash provided by (used in) financing activities	4,031				(807		)	(1,476		)	1,301			3,049
Net decrease in cash and cash equivalents	—				—			(1,720		)	—			(1,720		)
Cash and cash equivalents at beginning of year	—				—			3,705			—			3,705
Cash and cash equivalents at end of year	$	—			$	—		$	1,985		$	—		$	1,985

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	SUBSEQUENT EVENTS
	FCX evaluated events after December 31, 2013, and through the date the financial statements were issued, and determined any events or transactions occurring during this period that would require recognition or disclosure are appropriately addressed in these financial statements.

QUARTERLY_FINANCIAL_INFORMATIO

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly Financial Information	'
	QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
		First			Second			Third			Fourth			Year
		Quarter			Quarter			Quarter			Quarter
	2013
	Revenues	$	4,583		$	4,288	a	$	6,165	a	$	5,885	a	$	20,921	a
	Operating income	1,355		b	639		b	1,707		b	1,650		b,c	5,351		b,c
	Net income	824			610		e	1,048			959		e	3,441		e
	Net income attributable to noncontrolling
	interests	176			128			227			252			783
	Net income attributable to FCX common
	stockholders	648		b,d	482		a,b,d,e,f	821		a,b	707		a,b,c,d,e	2,658		a,b,c,d,e,f
	Basic net income per share attributable
	to FCX common stockholders	0.68			0.49			0.79			0.68			2.65
	Diluted net income per share attributable
	to FCX common stockholders	0.68		b,d	0.49		a,b,d,e,f	0.79		a,b	0.68		a,b,c,d,e	2.64		a,b,c,d,e,f
	2012
	Revenues	$	4,605		$	4,475		$	4,417		$	4,513		$	18,010
	Operating income	1,734			1,311			1,411			1,358		g,h	5,814		g,h
	Net income	1,001			894			1,140		i	945			3,980		i
	Net income attributable to noncontrolling
	interests	237			184			316		i	202			939		i
	Net income attributable to FCX common
	stockholders	764		j	710			824		i	743		g,h	3,041		g,h,i,j
	Basic net income per share attributable
	to FCX common stockholders	0.81			0.75			0.87			0.78			3.2
	Diluted net income per share attributable
	to FCX common stockholders	0.8		j	0.74			0.86		i	0.78		g,h	3.19		g,h,i,j
	a.	Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.
	b.	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.
	c.	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.
	d.	Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.
	e.	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
	f.	Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.
	g.	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.
	h.	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.
	i.	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.
	j.	Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

SUPPLEMENTARY_MINERAL_RESERVE_

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED)	12 Months Ended
	Dec. 31, 2013
Supplementary Mineral Reserve Information [Abstract]	'
Supplementary Mineral Reserve Information	'
	SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED)
	Recoverable proven and probable reserves have been calculated as of December 31, 2013, in accordance with Industry Guide 7 as required by the Securities Exchange Act of 1934. FCX’s proven and probable reserves may not be comparable to similar information regarding mineral reserves disclosed in accordance with the guidance in other countries. Proven and probable reserves were determined by the use of mapping, drilling, sampling, assaying and evaluation methods generally applied in the mining industry, as more fully discussed below. The term “reserve,” as used in the reserve data presented here, means that part of a mineral deposit that can be economically and legally extracted or produced at the time of the reserve determination. The term “proven reserves” means reserves for which (i) quantity is computed from dimensions revealed in outcrops, trenches, workings or drill holes; (ii) grade and/or quality are computed from the results of detailed sampling; and (iii) the sites for inspection, sampling and measurements are spaced so closely and the geologic character is sufficiently defined that size, shape, depth and mineral content of reserves are well established. The term “probable reserves” means reserves for which quantity and grade are computed from information similar to that used for proven reserves but the sites for sampling are farther apart or are otherwise less adequately spaced. The degree of assurance, although lower than that for proven reserves, is high enough to assume continuity between points of observation.
	FCX’s reserve estimates are based on the latest available geological and geotechnical studies. FCX conducts ongoing studies of its ore bodies to optimize economic values and to manage risk. FCX revises its mine plans and estimates of proven and probable mineral reserves as required in accordance with the latest available studies.
	Estimated recoverable proven and probable reserves at December 31, 2013, were determined using long-term average prices of $2.00 per pound for copper (consistent with the long-term average copper price used since December 31, 2010), $1,000 per ounce for gold and $10 per pound for molybdenum. For the three-year period ended December 31, 2013, LME spot copper prices averaged $3.64 per pound, London PM gold prices averaged $1,550 per ounce and the weekly average price for molybdenum quoted by Metals Week averaged $12.85 per pound.
	The recoverable proven and probable reserves presented in the table below represent the estimated metal quantities from which FCX expects to be paid after application of estimated metallurgical recovery rates and smelter recovery rates, where applicable. Recoverable reserves are that part of a mineral deposit that FCX estimates can be economically and legally extracted or produced at the time of the reserve determination.
		Recoverable Proven and Probable Mineral Reserves
		Estimated at December 31, 2013
		Coppera		Gold		Molybdenum
		(billion pounds)		(million ounces)		(billion pounds)
	North America	36.2		0.4		2.55
	South America	37		1.1		0.71
	Indonesia	30		29.8		—
	Africa	8		—		—
	Consolidatedb	111.2		31.3		3.26
	Net equity interestc	88.6		28.3		2.93
	a.	Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.
	b.	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.87 billion pounds of cobalt at Tenke and 308.5 million ounces of silver in Indonesia, South America and North America, which were determined using long-term average prices of $10 per pound for cobalt and $15 per ounce for silver.
	c.	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.48 billion pounds of cobalt at Tenke and 252.9 million ounces of silver in Indonesia, South America and North America.
			Recoverable Proven and Probable Mineral Reserves
			Estimated at December 31, 2013
					Average Ore Grade					Recoverable Proven and
					Per Metric Tona					Probable Reservesb
			Orea		Copper	Gold		Molybdenum		Copper	Gold		Molybdenum
			(million							(billion	(million		(billion
			metric tons)		(%)	(grams)		(%)		pounds)	ounces)		pounds)
	North America
	Developed and producing:
	Morenci		3,779		0.27	—		—	c	14.6	—		0.15
	Bagdad		1,449		0.31	—	c	0.02		7.9	0.1		0.39
	Safford		149		0.45	—		—		1.2	—		—
	Sierrita		2,534		0.23	—	c	0.03		11	0.1		1.08
	Miami		15		0.43	—		—		0.2	—		—
	Chino		376		0.42	0.02		—	c	2.6	0.2		0.01
	Tyrone		69		0.34	—		—		0.5	—		—
	Henderson		105		—	—		0.17		—	—		0.33
	Climax		189		—	—		0.16		—	—		0.61
	Undeveloped:
	Cobre		73		0.39	—		—		0.3	—		—
	South America
	Developed and producing:
	Cerro Verde		4,047		0.37	—		0.01		29.4	—		0.71
	El Abra		576		0.45	—		—		3.6	—		—
	Candelaria		281		0.58	0.14		—		3.9	1.1		—
	Ojos del Salado		8		1	0.23		—		0.1	—	c	—
	Indonesia
	Developed and producing:
	Grasberg open pit		206		0.95	1.08		—		3.6	5.8		—
	Deep Ore Zone		152		0.56	0.73		—		1.6	2.8		—
	Big Gossan		54		2.22	0.97		—		2.5	1.1		—
	Undeveloped:
	Grasberg Block Cave		1,000		1.02	0.78		—		18.9	16.1		—
	Kucing Liar		420		1.24	1.07		—		9.8	6.5		—
	Deep Mill Level Zone		526		0.83	0.7		—		8.3	9.3		—
	Africa
	Developed and producing:
	Tenke Fungurume		113		3.34	—		—		8	—		—
	Total 100% basis		16,121							128	43.1		3.28
	Consolidatedd									111.2	31.3		3.26
	FCX’s equity sharee									88.6	28.3		2.93
	a.	Excludes material contained in stockpiles.
	b.	Included estimated recoverable metals contained in stockpiles.
	c.	Amounts not shown because of rounding.
	d.	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
e.	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

SUPPLEMENTARY_OIL_AND_GAS_INFO

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Notes)	12 Months Ended
	Dec. 31, 2013
Supplementary Oil and Gas Information [Abstract]	'
Oil and Gas Exploration and Production Industries Disclosures [Text Block]	'
	SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED)
	Costs Incurred. FCX's oil and gas acquisition, exploration and development activities since the acquisitions of PXP and MMR follow:
	Property acquisition costs:
	Proved propertiesa	$	12,205
	Unproved propertiesb	11,259
	Exploration costs	502
	Development costs	854
		$	24,820
	a.	Included $12.2 billion from the acquisitions of PXP and MMR.
	b.	Included $11.1 billion from the acquisitions of PXP and MMR.
	These amounts included AROs of $1.1 billion (including $1.0 billion assumed in the acquisitions of PXP and MMR), capitalized general and administrative expenses of $67 million and capitalized interest of $69 million.
	Capitalized Costs. The following table presents the aggregate capitalized costs subject to amortization for oil and gas properties and the aggregate related accumulated amortization as of December 31, 2013:
	Properties subject to amortization		$	13,829
	Accumulated amortization		(1,357		)
			$	12,472
	The average amortization rate per barrel of oil equivalents (BOE) was $35.54 for the period from June 1, 2013, to December 31, 2013.
	Costs Not Subject to Amortization. The following table summarizes the categories of costs comprising the amount of unproved properties not subject to amortization as of December 31, 2013:
	U.S.:
	Onshore
	Acquisition costs		$	3,109
	Exploration costs		8
	Capitalized interest		11
	Offshore
	Acquisition costs		7,528
	Exploration costs		163
	Capitalized interest		53
	International:
	Offshore
	Acquisition costs		15
	Exploration costs		—
	Capitalized interest		—
			$	10,887
	FCX expects that 61 percent of the costs not subject to amortization at December 31, 2013, will be transferred to the amortization base over the next five years and the majority of the remainder in the next seven to ten years.
	Approximately 41 percent of the total U.S. net undeveloped acres is covered by leases that expire from 2014 to 2016; however, a significant portion of this acreage is expected to be retained by drilling operations or other means. The lease for FM O&G's Morocco acreage expires in 2016; however, FM O&G has the ability to extend the lease through 2019. Over 90 percent of the acreage in the Haynesville shale play in Louisiana and over 70 percent of the acreage in the Eagle Ford shale play in Texas is currently held by production or held by operations, and future plans include drilling or otherwise extending leases on the remaining acreage.
	Results of Operations for Oil and Gas Producing Activities. The results of operations from oil and gas producing activities from June 1, 2013, to December 31, 2013, presented below exclude non-oil and gas revenues, general and administrative expenses, interest expense and interest income. Income tax expense was determined by applying the statutory rates to pre-tax operating results:
	Revenues from oil and gas producing activities		$	2,616
	Production and delivery costs		(682		)
	Depreciation, depletion and amortization		(1,358		)
	Income tax expense (based on FCX's statutory tax rate)		(219		)
	Results of operations from oil and gas producing activities (excluding general and administrative expenses, interest expense and interest income)		$	357
	Proved Oil and Natural Gas Reserve Information. The following information summarizes the net proved reserves of oil (including condensate and natural gas liquids (NGLs)) and natural gas and the standardized measure as described below. All of the oil and natural gas reserves are located in the U.S.
	Management believes the reserve estimates presented herein, in accordance with generally accepted engineering and evaluation principles consistently applied, are reasonable. However, there are numerous uncertainties inherent in estimating quantities and values of proved reserves and in projecting future rates of production and the amount and timing of development expenditures, including many factors beyond FCX's control. Reserve engineering is a subjective process of estimating the recovery from underground accumulations of oil and natural gas that cannot be measured in an exact manner, and the accuracy of any reserve estimate is a function of the quality of available data and of engineering and geological interpretation and judgment. Because all oil and natural gas reserve estimates are to some degree subjective, the quantities of oil and natural gas that are ultimately recovered, production and operating costs, the amount and timing of future development expenditures and future crude oil and natural gas sales prices may all differ from those assumed in these estimates. In addition, different reserve engineers may make different estimates of reserve quantities and cash flows based upon the same available data. Therefore, the standardized measure of discounted future net cash flows (Standardized Measure) shown below represents estimates only and should not be construed as the current market value of the estimated reserves attributable to FCX's oil and gas properties. In this regard, the information set forth in the following tables includes revisions of reserve estimates attributable to proved properties acquired from PXP and MMR, and reflect additional information from subsequent development activities, production history of the properties involved and any adjustments in the projected economic life of such properties resulting from changes in product prices.
	Decreases in the prices of crude oil and natural gas could have an adverse effect on the carrying value of the proved reserves, reserve volumes and FCX's revenues, profitability and cash flows. FCX's reference prices for reserve determination are the WTI spot price for crude oil and the Henry Hub spot price for natural gas. As of February 14, 2014, the twelve-month average of the first-day-of-the-month historical reference price for natural gas has increased from $3.67 per MMBtu at year-end 2013 to $3.89 per MMBtu, while the comparable price for crude oil has increased from $96.94 per barrel at year-end 2013 to $97.46 per barrel.
	Historically, the market price for California crude oil differs from the established market indices in the U.S. primarily because of the higher transportation and refining costs associated with heavy oil. Recently, however, the market price for California crude oil has strengthened relative to NYMEX and WTI primarily resulting from world demand and declining domestic supplies of both Alaskan and California crude oil. Approximately 40 percent of FCX's year-end 2013 oil and natural gas reserve volumes are attributable to properties in California where differentials to the reference prices have been volatile as a result of these factors.
	The market price for GOM crude oil differs from WTI as a result of a large portion of FCX's production being sold under a Heavy Louisiana Sweet based pricing. Approximately 25 percent of FCX's 2013 oil and natural gas reserve volumes are attributable to properties in the GOM where oil price realizations are generally higher because of these marketing contracts.
	Estimated Quantities of Oil and Natural Gas Reserves. The following table sets forth certain data pertaining to proved, proved developed and proved undeveloped reserves all of which are in the U.S. for the period June 1, 2013, to December 31, 2013.
			Oil			Gas		Total
			(MMbls)a,b			(Bcf)a		(MMBOE)a
	Proved reserves:
	Acquisitions of PXP and MMR		368			626		472
	Extensions and discoveries		20			20		24
	Revisions of previous estimates		11			(26	)	7
	Sale of reserves in-place		—			(3	)	(1	)
	Production		(29	)		(55	)	(38	)
	Balance at December 31, 2013		370			562		464
	Proved developed reserves at December 31, 2013		236			423		307
	Proved undeveloped reserves at December 31, 2013		134			139		157
	a.	MMbls =illion barrels; Bcf =illion cubic feet; MMBOE =illion BOE
	b.	Included 20 MMBbls of NGL proved reserves, consisting of 14 MMBbls of proved developed and 6 MMBbls of proved undeveloped at December 31, 2013.
	From June 1, 2013, to December 31, 2013, FCX had a total of 24 MMBOE of extensions and discoveries, including 16 MMBOE in the Eagle Ford shale play resulting from continued successful drilling that extended and developed FCX's proved acreage and 5 MMBOE in the Deepwater GOM, primarily associated with the previously drilled Holstein Deep development acquired during 2013.
	From June 1, 2013, to December 31, 2013, FCX had net positive revisions of 7 MMBOE consisting of 29 MMBOE primarily related to improved performance at certain FCX onshore California and Deepwater GOM properties, partially offset by performance reductions of 22 MMBOE primarily related to certain other FCX Deepwater GOM properties and the Haynesville shale play.
	From June 1, 2013, to December 31, 2013, FCX sold reserves in-place totaling 1 MMBOE related to its Panhandle properties.
	Standardized Measure. The Standardized Measure (discounted at 10 percent) from production of proved oil and natural gas reserves has been developed as of December 31, 2013, in accordance with SEC guidelines. FCX estimated the quantity of proved oil and natural gas reserves and the future periods in which they are expected to be produced based on year-end economic conditions. Estimates of future net revenues from FCX's proved oil and gas properties and the present value thereof were made using the twelve-month average of the first-day-of-the-month historical reference prices as adjusted for location and quality differentials, which are held constant throughout the life of the oil and gas properties, except where such guidelines permit alternate treatment, including the use of fixed and determinable contractual price escalations. Future gross revenues were reduced by estimated future operating costs (including production and ad valorem taxes) and future development and abandonment costs, all of which were based on current costs in effect at December 31, 2013, and held constant throughout the life of the oil and gas properties. Future income taxes were calculated by applying the statutory federal and state income tax rate to pre-tax future net cash flows, net of the tax basis of the respective oil and gas properties and utilization of FCX's available tax carryforwards related to its oil and gas operations.
Excluding the impact of crude oil and natural gas derivative contracts, the average realized sales prices used in FCX's reserve reports as of December 31, 2013, were $99.67 per barrel of crude oil and $3.64 per one thousand cubic feet (Mcf) of natural gas.
The Standardized Measure related to proved oil and natural gas reserves as of December 31, 2013, follows:
Future cash inflows		$	38,901
Future production expense		(12,774		)
Future development costsa		(6,480		)
Future income tax expense		(4,935		)
Future net cash flows		14,712
Discounted at 10% per year		(5,295		)
Standardized Measure		$	9,417
a. Included estimated asset retirement costs of $1.8 billion.
The following table summarizes the principal sources of changes in the Standardized Measure from June 1, 2013, to December 31, 2013:
Reserves acquired in the acquisitions of PXP and MMR		$	14,467
Sales, net of production expenses		(2,296		)
Net changes in sales and transfer prices, net of production expenses		(459		)
Extensions, discoveries and improved recoveries		752
Changes in estimated future development costs		(1,190		)
Previously estimated development costs incurred during the year		578
Sales of reserves in-place		(12		)
Other purchases of reserves in-place		—
Revisions of quantity estimates		102
Accretion of discount		701
Net change in income taxes		(3,226		)
Balance at December 31, 2013		$	9,417

SCHEDULE_II_VALUATION_AND_QUAL

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2013
Schedule To Financial Statements [Abstract]	'
Schedule II - Valuation and Qualifying Accounts	'
					Additions
			Balance at		Charged to		Charged to			Other				Balance at
			Beginning of		Costs and		Other			Additions				End of
			Year		Expense		Accounts			(Deductions)				Year
	Reserves and allowances deducted
	from asset accounts:
	Materials and supplies inventory allowances
	Year Ended December 31, 2013		$	27	$	22	$	—		$	(25	)	a	$	24
	Year Ended December 31, 2012		26		7		—			(6		)	a	27
	Year Ended December 31, 2011		26		4		—			(4		)	a	26
	Valuation allowance for deferred tax assets
	Year Ended December 31, 2013		$	2,443	$	42	$	—		$	—			$	2,485
	Year Ended December 31, 2012		2,393		49		1			—				2,443
	Year Ended December 31, 2011		2,226		146		21			—				2,393
	Reserves for non-income taxes:
	Year Ended December 31, 2013		$	80	$	35	$	(1	)	$	(36	)	b	$	78
	Year Ended December 31, 2012		73		21		(2		)	(12		)	b	80
	Year Ended December 31, 2011		73		12		(2		)	(10		)	b	73
	a.	Primarily represents write-offs of obsolete materials and supplies inventories.
	b.	Represents amounts paid or adjustments to reserves based on revised estimates.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

'

Basis of Presentation

'

Basis of Presentation.  The consolidated financial statements of Freeport-McMoRan Copper & Gold Inc. (FCX) include the accounts of those subsidiaries where FCX directly or indirectly has more than 50 percent of the voting rights and has the right to control significant management decisions. The most significant entities that FCX consolidates include its 90.64 percent-owned subsidiary PT Freeport Indonesia (PT-FI), and its wholly owned subsidiaries, Freeport-McMoRan Corporation (FMC, formerly Phelps Dodge Corporation), Atlantic Copper, S.L.U. (Atlantic Copper) and FCX Oil & Gas Inc. (FM O&G). FCX acquired Plains Exploration & Production Company (PXP) and McMoRan Exploration Co. (MMR), collectively known as FM O&G, on May 31, 2013, and June 3, 2013, respectively. FCX’s results of operations include PXP's results beginning June 1, 2013, and MMR's results beginning June 4, 2013 (refer to Note 2 for further discussion). FCX’s unincorporated joint ventures with Rio Tinto plc (Rio Tinto) and Sumitomo Metal Mining Arizona, Inc. (Sumitomo) are reflected using the proportionate consolidation method (refer to Note 3 for further discussion). All significant intercompany transactions have been eliminated. Dollar amounts in tables are stated in millions, except per share amounts.

Investments in unconsolidated companies owned 20 percent or more are recorded using the equity method. Investments in companies owned less than 20 percent, and for which FCX does not exercise significant influence, are carried at cost.

Business Segments

'

Business Segments.  Subsequent to the acquisitions of PXP and MMR, FCX has organized its operations into six primary divisions – North America copper mines, South America mining, Indonesia mining, Africa mining, Molybdenum mines and United States (U.S.) oil and gas operations. Notwithstanding this structure, FCX internally reports information on a mine-by-mine basis for its mining operations. Therefore, FCX concluded that its operating segments include individual mines or operations relative to its mining operations. For oil and gas operations, FCX determines its operating segments on a country-by-country basis. Operating segments that meet certain financial thresholds are reportable segments. Refer to Note 16 for further discussion.

Use of Estimates

'

Use of Estimates.  The preparation of FCX’s financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the amounts reported in these financial statements and accompanying notes. The more significant areas requiring the use of management estimates include reserve estimation (minerals, and oil and natural gas); timing of transfers of oil and gas properties not subject to amortization into the full cost pool; asset lives for depreciation, depletion and amortization; environmental obligations; asset retirement obligations; estimates of recoverable copper in mill and leach stockpiles; deferred taxes and valuation allowances; reserves for contingencies and litigation; asset impairment, including estimates used to derive future cash flows associated with those assets; determination of fair value of assets acquired, liabilities assumed and redeemable noncontrolling interest, and recognition of goodwill and deferred taxes in connection with business combinations; pension benefits; and valuation of derivative instruments. Actual results could differ from those estimates.

Foreign Currencies

'

Foreign Currencies.  For foreign subsidiaries whose functional currency is the U.S. dollar, monetary assets and liabilities denominated in the local currency are translated at current exchange rates, and non-monetary assets and liabilities, such as inventories, property, plant, equipment and development costs, are translated at historical rates. Gains and losses resulting from translation of such account balances are included in net income, as are gains and losses from foreign currency transactions. The functional currency for the majority of FCX's foreign operations is the U.S. dollar.

Cash Equivalents

'

Cash Equivalents.  Highly liquid investments purchased with maturities of three months or less are considered cash equivalents.

Inventories

'

Inventories.  The components of inventories include materials and supplies, mill and leach stockpiles, and product inventories. Product inventories mostly include finished goods (primarily concentrates and cathodes) at mining operations, and concentrates and work-in-process at Atlantic Copper’s smelting and refining operations (refer to Note 4 for further discussion). Mill and leach stockpiles, and inventories of materials and supplies, as well as salable products, are stated at the lower of weighted-average cost or market. Costs of finished goods and work-in-process (i.e., not materials and supplies) inventories include labor and benefits, supplies, energy, depreciation, depletion, amortization, site overhead costs and other necessary costs associated with the extraction and processing of ore, including, depending on the process, mining, haulage, milling, concentrating, smelting, leaching, solution extraction, refining, roasting and chemical processing. Corporate general and administrative costs are not included in inventory costs.

Work-in-Process. In-process inventories include mill and leach stockpiles at mining operations and Atlantic Copper's in-process product inventories. In-process inventories represent materials that are currently in the process of being converted to a salable product. Conversion processes for mining operations vary depending on the nature of the copper ore and the specific mining operation. For sulfide ores, processing includes milling and concentrating and results in the production of copper and molybdenum concentrates or, alternatively, copper cathode by concentrate leaching. For oxide ores and certain secondary sulfide ores, processing includes leaching of stockpiles, solution extraction and electrowinning (SX/EW) and results in the production of copper cathodes. In-process stockpile material is measured based on assays of the material included in these processes and projected recoveries. In-process inventories are valued based on the costs incurred to various points in the process, including depreciation relating to associated process facilities.

Both mill and leach stockpiles generally contain lower grade ores that have been extracted from the ore body and are available for copper recovery. For mill stockpiles, recovery is through milling, concentrating, smelting and refining or, alternatively, by concentrate leaching. For leach stockpiles, recovery is through exposure to acidic solutions that dissolve contained copper and deliver it in solution to extraction processing facilities. The recorded cost of mill and leach stockpiles includes mining and haulage costs incurred to deliver ore to stockpiles, depreciation, depletion, amortization and site overhead costs. Material is removed from the stockpiles at a weighted-average cost per pound.

Because it is generally impracticable to determine copper contained in mill and leach stockpiles by physical count, reasonable estimation methods are employed. The quantity of material delivered to mill and leach stockpiles is based on surveyed volumes of mined material and daily production records. Sampling and assaying of blasthole cuttings determine the estimated copper grade of the material delivered to mill and leach stockpiles.

Expected copper recovery rates for mill stockpiles are determined by metallurgical testing. The recoverable copper in mill stockpiles, once entered into the production process, can be produced into copper concentrate almost immediately.

Expected copper recovery rates for leach stockpiles are determined using small-scale laboratory tests, small- to large-scale column testing (which simulates the production-scale process), historical trends and other factors, including mineralogy of the ore and rock type. Total copper recovery in leach stockpiles can vary significantly from a low percentage to more than 90 percent depending on several variables, including processing methodology, processing variables, mineralogy and particle size of the rock. For newly placed material on active stockpiles, as much as 80 percent total copper recovery may be extracted during the first year, and the remaining copper may be recovered over many years.

Processes and recovery rates for mill and leach stockpiles are monitored regularly, and recovery rate estimates are adjusted periodically as additional information becomes available and as related technology changes. Adjustments to recovery rates will typically result in a future impact to the value of the material removed from the stockpiles at a revised weighted-average cost per pound of recoverable copper.

For Atlantic Copper, in-process inventories represent copper concentrates at various stages of conversion into anodes and cathodes. Atlantic Copper’s in-process inventories are valued at the weighted-average cost of the material fed to the smelting and refining process plus in-process conversion costs.

Finished Goods. Finished goods for mining operations represent salable products (e.g., copper and molybdenum concentrates, copper anodes, copper cathodes, copper rod, copper wire, molybdenum oxide, high-purity molybdenum chemicals and other metallurgical products, and various cobalt products). Finished goods are valued based on the weighted-average cost of source material plus applicable conversion costs relating to associated process facilities.

Property, Plant, Equipment and Development Costs

'

Property, Plant, Equipment and Mining Development Costs.  Property, plant, equipment and mining development costs are carried at cost. Mineral exploration costs, as well as drilling and other costs incurred for the purpose of converting mineral resources to proven and probable reserves or identifying new mineral resources at development or production stage properties, are charged to expense as incurred. Development costs are capitalized beginning after proven and probable mineral reserves have been established. Development costs include costs incurred resulting from mine pre-production activities undertaken to gain access to proven and probable reserves, including shafts, adits, drifts, ramps, permanent excavations, infrastructure and removal of overburden. Additionally, interest expense allocable to the cost of developing mining properties and to constructing new facilities is capitalized until assets are ready for their intended use.

Expenditures for replacements and improvements are capitalized. Costs related to periodic scheduled maintenance (i.e., turnarounds) are charged to expense as incurred. Depreciation for mining and milling life-of-mine assets, infrastructure and other common costs is determined using the unit-of-production (UOP) method based on total estimated recoverable proven and probable copper reserves (for primary copper mines) and proven and probable molybdenum reserves (for primary molybdenum mines). Development costs and acquisition costs for proven and probable mineral reserves that relate to a specific ore body are depreciated using the UOP method based on estimated recoverable proven and probable mineral reserves for the ore body benefited. Depreciation, depletion and amortization using the UOP method is recorded upon extraction of the recoverable copper or molybdenum from the ore body, at which time it is allocated to inventory cost and then included as a component of cost of goods sold. Other assets are depreciated on a straight-line basis over estimated useful lives of up to 39 years for buildings and three to 25 years for machinery and equipment, and mobile equipment.

Included in property, plant, equipment and mining development costs is value beyond proven and probable mineral reserves (VBPP), primarily resulting from FCX’s acquisition of FMC in 2007. The concept of VBPP has been interpreted differently by different mining companies. FCX’s VBPP is attributable to (i) mineralized material, which includes measured and indicated amounts, that FCX believes could be brought into production with the establishment or modification of required permits and should market conditions and technical assessments warrant, (ii) inferred mineral resources and (iii) exploration potential.

Carrying amounts assigned to VBPP are not charged to expense until the VBPP becomes associated with additional proven and probable mineral reserves and the reserves are produced or the VBPP is determined to be impaired. Additions to proven and probable mineral reserves for properties with VBPP will carry with them the value assigned to VBPP at the date acquired, less any impairment amounts.

Oil and Gas Properties

'

Oil and Gas Properties. FCX follows the full cost method of accounting specified by the U.S. Securities and Exchange Commission's (SEC) rules whereby all costs associated with oil and gas property acquisition, exploration and development activities are capitalized into a cost center on a country-by-country basis. Such costs include internal general and administrative costs, such as payroll and related benefits and costs directly attributable to employees engaged in acquisition, exploration and development activities. General and administrative costs associated with production, operations, marketing and general corporate activities are charged to expense as incurred. Capitalized costs, along with estimated future costs to develop proved reserves and asset retirement costs that are not already included in oil and gas properties, net of related salvage value, are amortized to expense under the UOP method using engineers' estimates of the related, by-country proved oil and natural gas reserves.

The costs of unproved oil and gas properties are excluded from amortization until the properties are evaluated. Costs are transferred into the amortization base on an ongoing basis as the properties are evaluated and proved oil and natural gas reserves are established or impairment is determined. Unproved oil and gas properties are assessed periodically, at least annually, to determine whether impairment has occurred. FCX assesses oil and gas properties on an individual basis or as a group if properties are individually insignificant. The assessment considers the following factors, among others: intent to drill, remaining lease term, geological and geophysical evaluations, drilling results and activity, the assignment of proved reserves and the economic viability of development if proved reserves are assigned. During any period in which these factors indicate an impairment, the cumulative drilling costs incurred to date for such property and all or a portion of the associated leasehold costs are transferred to the full cost pool and are then subject to amortization. The transfer of costs into the amortization base involves a significant amount of judgment and may be subject to changes over time based on drilling plans and results, geological and geophysical evaluations, the assignment of proved oil and natural gas reserves, availability of capital and other factors. Costs not subject to amortization consist primarily of capitalized costs incurred for undeveloped acreage and wells in progress pending determination, together with capitalized interest for these projects. The ultimate evaluation of the properties will occur over a period of several years. Interest costs totaling $69 million in 2013 were capitalized on oil and gas properties not subject to amortization and in the process of development. Proceeds from the sale of oil and gas properties are accounted for as reductions to capitalized costs unless the reduction causes a significant change in proved reserves, which absent other factors, is generally described as a 25 percent or greater change, and significantly alters the relationship between capitalized costs and proved reserves attributable to a cost center, in which case a gain or loss is recognized.

Under the SEC full cost accounting rules, FCX reviews the carrying value of its oil and gas properties each quarter on a country-by-country basis. Under these rules, capitalized costs of oil and gas properties (net of accumulated depreciation, depletion and amortization, and related deferred income taxes) for each cost center may not exceed a “ceiling” equal to:

•

the present value, discounted at 10 percent, of estimated future net cash flows from the related proved oil and natural gas reserves, net of estimated future income taxes; plus

•

the cost of the related unproved properties not being amortized; plus

•

the lower of cost or estimated fair value of the related unproved properties included in the costs being amortized (net of related tax effects).

These rules require that FCX price its future oil and gas production at the twelve-month average of the first-day-of-the-month historical reference prices as adjusted for location and quality differentials. FCX's reference prices are West Texas Intermediate (WTI) for oil and the Henry Hub spot price for natural gas. Such prices are utilized except where different prices are fixed and determinable from applicable contracts for the remaining term of those contracts. The reserve estimates exclude the effect of any crude oil and natural gas derivatives FCX has in place. The estimated future net cash flows also exclude future cash outflows associated with settling asset retirement obligations included in the net book value of the oil and gas properties. The rules require an impairment if the capitalized costs exceed this “ceiling.” At December 31, 2013, the ceiling with respect to FCX's oil and gas properties exceeded the net capitalized costs, and therefore, no impairment was recorded.

Goodwill

'

Goodwill. Goodwill has an indefinite useful life and is not amortized, but rather is tested for impairment at least annually during the fourth quarter, unless events occur or circumstances change between annual tests that would more likely than not reduce the fair value of a related reporting unit below its carrying value. Impairment occurs when the carrying amount of goodwill exceeds its implied fair value. FCX generally uses a discounted cash flow model to determine if the carrying value of a reporting unit, including goodwill, is less than the fair value of the reporting unit. FCX's approach to allocating goodwill includes the identification of the reporting unit it believes has contributed to the excess purchase price and includes consideration of the reporting unit's potential for future growth. Goodwill arose in 2013 with FCX's acquisitions of PXP and MMR, and has been allocated to the U.S. oil and gas reporting unit. Events affecting crude oil and natural gas prices may cause a decrease in the fair value of the reporting unit, and FCX could have an impairment of its goodwill in future periods. When a sale of oil and gas properties occurs, goodwill is allocated to that property based on the relationship of the fair value of the property sold to the total reporting unit's fair value. A significant sale of oil and gas properties may represent a triggering event that requires goodwill to be evaluated for impairment.

Asset Impairment for Mining Operations

'

Asset Impairment for Mining Operations. FCX reviews and evaluates its mining long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Mining long-lived assets are evaluated for impairment under the two-step model. An impairment is considered to exist if total estimated future cash flows on an undiscounted basis are less than the carrying amount of the asset. Once it is determined that an impairment exists, an impairment loss is measured as the amount by which the asset carrying value exceeds its fair value. Fair value is generally determined using valuation techniques, such as discounted cash flows.

In evaluating mining operations’ long-lived assets for recoverability, estimates of after-tax undiscounted future cash flows of FCX’s individual mining operations are used, with impairment losses measured by reference to fair value. As quoted market prices are unavailable for FCX’s individual mining operations, fair value is determined through the use of discounted estimated future cash flows. Estimated cash flows used to assess recoverability of long-lived assets and measure the fair value of FCX’s mining operations are derived from current business plans, which are developed using near-term price forecasts reflective of the current price environment and management’s projections for long-term average metal prices. Estimates of future cash flows include near- and long-term metal price assumptions; estimates of commodity-based and other input costs; proven and probable mineral reserve estimates, including any costs to develop the reserves and the timing of producing the reserves; and the use of appropriate current escalation and discount rates. FCX believes its estimates and models used to determine fair value are similar to what a market participant would use.

Deferred Mining Costs

'

Deferred Mining Costs.  Stripping costs (i.e., the costs of removing overburden and waste material to access mineral deposits) incurred during the production phase of a mine are considered variable production costs and are included as a component of inventory produced during the period in which stripping costs are incurred. Major development expenditures, including stripping costs to prepare unique and identifiable areas outside the current mining area for future production that are considered to be pre-production mine development, are capitalized and amortized using the UOP method based on estimated recoverable proven and probable reserves for the ore body benefited. However, where a second or subsequent pit or major expansion is considered to be a continuation of existing mining activities, stripping costs are accounted for as a current production cost and a component of the associated inventory.

Environmental Expenditures

'

Environmental Expenditures. Environmental expenditures are charged to expense or capitalized, depending upon their future economic benefits. Accruals for such expenditures are recorded when it is probable that obligations have been incurred and the costs can be reasonably estimated. Environmental obligations attributed to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) or analogous state programs are considered probable when a claim is asserted, or is probable of assertion, and FCX, or any of its subsidiaries, have been associated with the site. Other environmental remediation obligations are considered probable based on specific facts and circumstances. FCX’s estimates of these costs are based on an evaluation of various factors, including currently available facts, existing technology, presently enacted laws and regulations, remediation experience, whether or not FCX is a potentially responsible party (PRP) and the ability of other PRPs to pay their allocated portions. With the exception of those obligations assumed in the acquisition of FMC that were recorded at estimated fair values (refer to Note 12 for further discussion), environmental obligations are recorded on an undiscounted basis. Where the available information is sufficient to estimate the amount of the obligation, that estimate has been used. Where the information is only sufficient to establish a range of probable liability and no point within the range is more likely than any other, the lower end of the range has been used. Possible recoveries of some of these costs from other parties are not recognized in the consolidated financial statements until they become probable. Legal costs associated with environmental remediation (such as fees to outside law firms for work relating to determining the extent and type of remedial actions and the allocation of costs among PRPs) are included as part of the estimated obligation.

Environmental obligations assumed in the acquisition of FMC, which were initially recorded at fair value and estimated on a discounted basis, are accreted to full value over time through charges to interest expense. Adjustments arising from changes in amounts and timing of estimated costs and settlements may result in increases and decreases in these obligations and are calculated in the same manner as they were initially estimated. Unless these adjustments qualify for capitalization, changes in environmental obligations are charged to operating income when they occur.

FCX performs a comprehensive review of its environmental obligations annually and also reviews changes in facts and circumstances associated with these obligations at least quarterly.

Asset Retirement Obligations

'

Asset Retirement Obligations.  FCX records the fair value of estimated asset retirement obligations (AROs) associated with tangible long-lived assets in the period incurred. Retirement obligations associated with long-lived assets are those for which there is a legal obligation to settle under existing or enacted law, statute, written or oral contract or by legal construction. These obligations, which are initially estimated based on discounted cash flow estimates, are accreted to full value over time through charges to cost of sales. In addition, asset retirement costs (ARCs) are capitalized as part of the related asset’s carrying value and are depreciated over the asset’s respective useful life.

For mining operations, reclamation costs for disturbances are recognized as an ARO and as a related ARC (included in property, plant, equipment and mining development costs) in the period of the disturbance and depreciated primarily on a UOP basis. FCX’s AROs for mining operations consist primarily of costs associated with mine reclamation and closure activities. These activities, which are site specific, generally include costs for earthwork, revegetation, water treatment and demolition (refer to Note 12 for further discussion).

For oil and gas properties, the fair value of the legal obligation is recognized as an ARO and as a related ARC(included in oil and gas properties) in the period in which the well is drilled or acquired and is amortized on a UOP basis together with other capitalized costs. Substantially all of FCX’s oil and gas leases require that, upon termination of economic production, the working interest owners plug and abandon non-producing wellbores, remove platforms, tanks, production equipment and flow lines, and restore the wellsite (refer to Note 12 for further discussion).

At least annually, FCX reviews its ARO estimates for changes in the projected timing of certain reclamation and closure/restoration costs, changes in cost estimates and additional AROs incurred during the period.

Litigation Contingencies

'

Litigation Contingencies.  At least quarterly, FCX assesses the likelihood of any adverse judgments or outcomes related to legal matters (including pending or threatened litigation matters), as well as ranges of potential losses. A determination of the amount of the reserve required, if any, for litigation contingencies is made after analysis of known issues. FCX records reserves related to legal matters for which it believes it is probable that a loss has been incurred and the amount of such loss can be reasonably estimated. Where the available information is sufficient to estimate the amount of the obligation, that estimate has been used. Where the information is only sufficient to establish a range of probable liability and no point within the range is more likely than any other, the lower end of the range has been used. With respect to other matters, for which management has concluded that a loss is only reasonably possible or remote, or not reasonably estimable, no liability has been recorded. For losses assessed as reasonably possible, FCX discloses the nature of the contingency and an estimate of the possible loss or range of loss or states that such an estimate cannot be made. Costs incurred to defend claims are charged to expense as incurred.

Litigation is inherently unpredictable, and it is difficult to project the outcome of particular matters with reasonable certainty; therefore, the actual amount of any loss could differ from the litigation contingencies reflected in FCX's consolidated financial statements. Refer to Note 12 for further discussion of FCX's litigation contingencies.

Income and Other Taxes

'

Income and Other Taxes.  FCX accounts for deferred income taxes utilizing an asset and liability method, whereby deferred tax assets and liabilities are recognized based on the tax effects of temporary differences between the financial statements and the tax basis of assets and liabilities, as measured by current enacted tax rates (refer to Note 11 for further discussion). When appropriate, FCX evaluates the need for a valuation allowance to reduce deferred tax assets to amounts that are more likely than not realizable. The effect on deferred income tax assets and liabilities of a change in tax rates or laws is recognized in income in the period in which such changes are enacted.

FCX accounts for uncertain income tax positions using a threshold and measurement criteria for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. FCX’s policy associated with uncertain tax positions is to record accrued interest in interest expense and accrued penalties in other income and expenses rather than in the provision for income taxes (refer to Note 11 for further discussion).

With the exception of Tenke Fungurume Mining S.A.R.L. (TFM or Tenke) in the Democratic Republic of Congo (DRC), income taxes are provided on the earnings of FCX’s material foreign subsidiaries under the assumption that these earnings will be distributed. FCX has determined that undistributed earnings related to TFM are reinvested indefinitely or have been allocated toward specifically identifiable needs of the local operations, including, but not limited to, certain contractual obligations and future plans for potential expansions of production capacity. Changes in contractual obligations or future plans for potential expansion could result in accrual of additional deferred income taxes related to undistributed earnings of TFM. FCX has not provided deferred income taxes for other differences between the book and tax carrying amounts of its investments in material foreign subsidiaries as FCX considers its ownership positions to be permanent in duration, and quantification of the related deferred tax liability is not practicable.

FCX's operations are in multiple jurisdictions where uncertainties arise in the application of complex tax regulations. Some of these tax regimes are defined by contractual agreements with the local government, while others are defined by general tax laws and regulations. FCX and its subsidiaries are subject to reviews of its income tax filings and other tax payments, and disputes can arise with the taxing authorities over the interpretation of its contracts or laws. The final taxes paid may be dependent upon many factors, including negotiations with taxing authorities. In certain jurisdictions, FCX must pay a portion of the disputed amount to the local government in order to formally appeal the assessment. Such payment is recorded as a receivable if FCX believes the amount is collectible.

Derivative Instruments

'

Derivative Instruments.  FCX may enter into derivative contracts to manage certain risks resulting from fluctuations in commodity prices (primarily copper, gold, crude oil and natural gas), foreign currency exchange rates and interest rates by creating offsetting market exposures. Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded in the balance sheet as either an asset or liability measured at its fair value. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative and the resulting designation. Refer to Note 14 for a summary of FCX’s outstanding derivative instruments at December 31, 2013, and a discussion of FCX’s risk management strategies for those designated as hedges.

Revenue Recognition

'

Revenue Recognition.  FCX sells its products pursuant to sales contracts entered into with its customers. Revenue for all FCX’s products is recognized when title and risk of loss pass to the customer and when collectibility is reasonably assured. The passing of title and risk of loss to the customer are based on terms of the sales contract, generally upon shipment or delivery of product.

Revenues from FCX’s concentrate and cathode sales are recorded based on a provisional sales price or a final sales price calculated in accordance with the terms specified in the relevant sales contract. Revenues from concentrate sales are recorded net of treatment and all refining charges (including price participation, if applicable, as discussed below) and the impact of derivative contracts. Moreover, because a portion of the metals contained in copper concentrates is unrecoverable as a result of the smelting process, FCX’s revenues from concentrate sales are also recorded net of allowances based on the quantity and value of these unrecoverable metals. These allowances are a negotiated term of FCX’s contracts and vary by customer. Treatment and refining charges represent payments or price adjustments to smelters and refiners and are either fixed or, in certain cases, vary with the price of copper (referred to as price participation).

Under the long-established structure of sales agreements prevalent in the mining industry, copper contained in concentrate and cathode is generally provisionally priced at the time of shipment. The provisional prices are finalized in a specified future month (generally one to four months from the shipment date) based on quoted monthly average spot copper prices on the London Metal Exchange (LME) or the Commodity Exchange Inc. (COMEX), a division of the New York Mercantile Exchange (NYMEX). FCX receives market prices based on prices in the specified future month, which results in price fluctuations recorded to revenues until the date of settlement. FCX records revenues and invoices customers at the time of shipment based on then-current LME or COMEX prices, which results in an embedded derivative (i.e., a pricing mechanism that is finalized after the time of delivery) that is required to be bifurcated from the host contract. The host contract is the sale of the metals contained in the concentrates or cathodes at the then-current LME or COMEX price. FCX applies the normal purchases and normal sales scope exception in accordance with derivatives and hedge accounting guidance to the host contract in its concentrate or cathode sales agreements since these contracts do not allow for net settlement and always result in physical delivery. The embedded derivative does not qualify for hedge accounting and is adjusted to fair value through earnings each period, using the period-end forward prices, until the date of final pricing.

Gold sales are priced according to individual contract terms, generally the average London Bullion Market Association (London) price for a specified month near the month of shipment.

Substantially all of FCX’s 2013 molybdenum sales were priced based on prices published in Metals Week, Ryan’s Notes or Metal Bulletin, plus conversion premiums for products that undergo additional processing, such as ferromolybdenum and molybdenum chemical products. The majority of these sales use the average price of the previous month quoted by the applicable publication. FCX’s remaining molybdenum sales generally have pricing that is either based on the current month published prices or a fixed price.

PT-FI concentrate sales and TFM metal sales are subject to certain royalties, which are recorded as a reduction to revenues (refer to Note 13 for further discussion).

Oil and gas revenue from FCX's interests in producing wells is recognized upon delivery and passage of title, net of any royalty interests or other profit interests in the produced product. Oil sales are primarily under contracts with prices based upon regional benchmarks. Approximately 50 percent of gas sales are priced monthly using industry recognized, published index pricing, and the remainder is priced daily on the spot market. Gas revenue is recorded using the sales method for gas imbalances. If FCX's sales of production volumes for a well exceed its portion of the estimated remaining recoverable reserves of the well, a liability is recorded. No receivables are recorded for those wells on which FCX has taken less than its ownership share of production unless the amount taken by other parties exceeds the estimate of their remaining reserves. There were no material gas imbalances at December 31, 2013.

Stock-Based Compensation

'

Stock-Based Compensation. Compensation costs for share-based payments to employees are measured at fair value and charged to expense over the requisite service period for awards that are expected to vest. The fair value of stock options is determined using the Black-Scholes-Merton option valuation model. The fair value for stock-settled restricted stock units (RSUs) is based on FCX's stock price on the date of grant. Shares of common stock are issued at the vesting date for stock-settled RSUs. The fair value for liability-classified awards (i.e., cash-settled stock appreciation rights (SARs) and cash-settled RSUs) is remeasured each reporting period using the Black-Scholes-Merton option valuation model for SARs and FCX's stock price for cash-settled RSUs. FCX estimates forfeitures at the time of grant and revises those estimates in subsequent periods through the final vesting date of the awards if actual forfeitures differ from those estimates. FCX has elected to recognize compensation costs for stock option awards and SARs that vest over several years on a straight-line basis over the vesting period, and for RSUs on the graded-vesting method over the vesting period. Refer to Note 10 for further discussion.

Earnings Per Share

'

Earnings Per Share.  FCX’s basic net income per share of common stock was calculated by dividing net income attributable to FCX common stockholders by the weighted-average shares of common stock outstanding during the year. A reconciliation of net income and weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share for the years ended December 31 follows:

2013

2012

2011

Net income

$

3,441

$

3,980

$

5,747

Net income attributable to noncontrolling interests

(761

)

(939

)

(1,187

)

Preferred dividends on redeemable noncontrolling interest

(22

)

—

—

Net income attributable to FCX common stockholders

$

2,658

$

3,041

$

4,560

Weighted-average shares of common stock outstanding (millions)

1,002

949

947

Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (millions)

4

a

5

a

8

a

Weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share (millions)

1,006

954

955

Diluted net income per share attributable to FCX common stockholders

$

2.64

$

3.19

$

4.78

a.

Excluded shares of common stock associated with outstanding stock options with exercise prices less than the average market price of FCX's common stock that were anti-dilutive based on the treasury stock method totaled approximately one million for the years ended December 31, 2013 and 2012, and two million for the year ended December 31, 2011.

Outstanding stock options with exercise prices greater than the average market price of FCX’s common stock during the year are excluded from the computation of diluted net income per share of common stock. Excluded stock options totaled 30 million with a weighted-average exercise price of $40.23 per option in 2013; 17 million with a weighted-average exercise price of $44.73 per option in 2012; and 4 million with a weighted-average exercise price of $53.91 per option in 2011.

Reclassifications

'

Reclassifications. For comparative purposes, primarily the revision to FCX’s presentation of its business segments, certain prior year amounts have been reclassified to conform with the current year presentation.

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Schedule of diluted earnings per share	'
	A reconciliation of net income and weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share for the years ended December 31 follows:
		2013				2012				2011
	Net income	$	3,441			$	3,980			$	5,747
	Net income attributable to noncontrolling interests	(761		)		(939		)		(1,187		)
	Preferred dividends on redeemable noncontrolling interest	(22		)		—				—
	Net income attributable to FCX common stockholders	$	2,658			$	3,041			$	4,560
	Weighted-average shares of common stock outstanding (millions)	1,002				949				947
	Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (millions)	4			a	5			a	8			a
	Weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share (millions)	1,006				954				955
	Diluted net income per share attributable to FCX common stockholders	$	2.64			$	3.19			$	4.78
	a.	Excluded shares of common stock associated with outstanding stock options with exercise prices less than the average market price of FCX's common stock that were anti-dilutive based on the treasury stock method totaled approximately one million for the years ended December 31, 2013 and 2012, and two million for the year ended December 31, 2011.

ACQUISITIONS_Tables

ACQUISITIONS (Tables)	12 Months Ended
	Dec. 31, 2013
Acquisitions [Abstract]	'
Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable [Table Text Block]	'
	Following is a summary of the $3.1 billion purchase price for MMR:
	Number of shares of MMR common stock acquired (millions)	112.362			a
	Cash consideration of $14.75 per share	$	14.75
	Cash consideration paid by FCX	$	1,657
	Employee stock-based awards	63
	Total	1,720
	Fair value of FCX's investment in 51 million shares of MMR common stock acquired on
	May 31, 2013, through the acquisition of PXP	854
	Fair value of FCX's investment in MMR's 5.75% Convertible Perpetual Preferred Stock, Series 2	554
	Total purchase price	$	3,128
	a.	Excluded 51 million shares of MMR common stock owned by FCX through its acquisition of PXP on May 31, 2013.
	Following is a summary of the $6.6 billion purchase price for PXP:
	Number of shares of PXP common stock acquired (millions)	132.28
	Exchange ratio of FCX common stock for each PXP share	0.6531
		86.392
	Shares of FCX common stock issued for certain PXP equity awards (millions)	4.769
	Total shares of FCX common stock issued (millions)	91.161
	Closing share price of FCX common stock at May 31, 2013	$	31.05
	FCX stock consideration	$	2,831
	Cash consideration	3,725			a
	Employee stock-based awards, primarily cash-settled stock-based awards	83
	Total purchase price	$	6,639
	a.	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.
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The following table summarizes the preliminary purchase price allocations for PXP and MMR as of December 31, 2013:
		PXP				MMR				Eliminations				Total
	Current assets	$	1,193			$	98			$	—			$	1,291
	Oil and gas properties - full cost method:
	Subject to amortization	11,447				756				—				12,203
	Not subject to amortization.	9,401				1,686				—				11,087
	Property, plant and equipment	261				1				—				262
	Investment in MMRa	848				—				(848		)		—
	Other assets	12				423				—				435
	Current liabilities	(906		)		(174		)		—				(1,080		)
	Debt (current and long-term)	(10,631		)		(620		)		—				(11,251		)
	Deferred income taxesb	(3,916		)		—				—				(3,916		)
	Other long-term liabilities	(799		)		(262		)		—				(1,061		)
	Redeemable noncontrolling interest	(708		)		(259		)		—				(967		)
	Total fair value, excluding goodwill	6,202				1,649				(848		)		7,003
	Goodwillc	437				1,479				—				1,916
	Total purchase price	$	6,639			$	3,128			$	(848	)		$	8,919
	a.	PXP owned 51 million shares of MMR common stock, which was eliminated in FCX's consolidated balance sheet at the acquisition date of MMR.
	b.	Deferred income taxes have been recognized based on the estimated fair value adjustments to net assets using a 38 percent tax rate, which reflected the 35 percent federal statutory rate and a 3 percent weighted-average of the applicable statutory state tax rates (net of federal benefit).
	c.	During the fourth quarter of 2013, FCX conducted a qualitative goodwill impairment assessment by examining relevant events and circumstances that could have a negative impact on FCX's goodwill, such as macroeconomic conditions, industry and market conditions, cost factors that have a negative effect on earnings and cash flows, overall financial performance, dispositions and acquisitions, and any other relevant events or circumstances. After assessing the relevant events and circumstances for the qualitative impairment assessment, FCX determined that performing a quantitative goodwill impairment test was unnecessary, and no goodwill impairment was recognized.
Schedule Of Adjustments To Recognized Identified Assets Acquired And Liabilities Assumed [Table Text Block]	'
	A summary of the 2013 adjustments to the initial fair values assigned to assets acquired, liabilities assumed and redeemable noncontrolling interest from the acquisitions follows:
			PXP				MMR				Total
	Increase in current assets (primarily current deferred income tax asset)		$	183			$	2			$	185
	Decreases in oil and gas properties - full cost method:
	Subject to amortization		—				(45		)		(45		)
	Not subject to amortization		(234		)		(6		)		(240		)
	Increase in other assets (deferred income tax asset)		—				24				24
	Net increase in deferred income tax liability		(45		)		—				(45		)
	Net decrease (increase) in other liabilities (primarily warrants)		77				(4		)		73
	Decrease in redeemable noncontrolling interest		41				—				41
	(Decrease) increase in goodwill		(17		)		29				12
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The historical consolidated financial information has been adjusted to reflect factually supportable items that are directly attributable to the acquisitions.
		Years Ended December 31,
		2013				2012
	Revenues	$	23,075			$	22,713
	Operating income	6,267				6,815
	Income from continuing operations	3,626				4,277
	Net income attributable to FCX common stockholders	2,825				3,301
	Net income per share attributable to FCX common stockholders:
	Basic	$	2.71			$	3.17
	Diluted	2.7				3.16

INVENTORIES_INCLUDING_LONGTERM1

INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Tables)	12 Months Ended
	Dec. 31, 2013
Inventories, Including Long Term Mill and Leach Stockpiles [Abstract]	'
Components of Inventories	'
	The components of inventories, excluding mill and leach stockpiles, follow:
		December 31,
		2013			2012
	Current inventories:
	Raw materials (primarily concentrates)	$	238		$	237
	Work-in-processa	199			252
	Finished goodsb	1,146			911
	Total product inventories	$	1,583		$	1,400
	Mill stockpiles	$	91		$	104
	Leach stockpiles	1,614		c	1,568
	Total current mill and leach stockpiles	$	1,705		$	1,672
	Total materials and supplies, netd	$	1,730		$	1,504
	Long-term inventories:
	Mill stockpiles	$	698		$	615
	Leach stockpiles	1,688			1,340
	Total long-term mill and leach stockpilese	$	2,386		$	1,955
	a.	FCX's mining operations also have work-in-process inventories that are included in mill and leach stockpiles.
	b.	Primarily included molybdenum concentrates; copper concentrates, anodes, cathodes and rod; and various cobalt products.
	c.	Amount is net of a $76 million charge associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles.
	d.	Materials and supplies inventory was net of obsolescence reserves totaling $24 million at December 31, 2013, and $27 million at December 31, 2012.
	e.	Estimated metals in stockpiles not expected to be recovered within the next 12 months.

PROPERTY_PLANT_EQUIPMENT_AND_M1

PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment, Net [Abstract]	'
Property, Plant, Equipment and Mining Development Costs, Net	'
	The components of net property, plant, equipment and mining development costs follow:
		December 31,
		2013			2012
	Proven and probable mineral reserves	$	4,651		$	4,630
	VBPP	1,044			1,067
	Mining development and other	4,335			3,821
	Buildings and infrastructure	4,334			3,811
	Machinery and equipment	10,379			9,472
	Mobile equipment	3,903			3,447
	Construction in progress	5,603			3,402
	Property, plant, equipment and mining development costs	34,249			29,650
	Accumulated depreciation, depletion and amortization	(10,207		)	(8,651		)
	Property, plant, equipment and mining development costs, net	$	24,042		$	20,999

OTHER_ASSETS_Tables

OTHER ASSETS (Tables)	12 Months Ended
	Dec. 31, 2013
Other Assets [Abstract]	'
Schedule of Other Assets [Table Text Block]	'
	The components of other assets follow:
		December 31,
		2013		2012
	Legally restricted fundsa	$	392	$	163
	Intangible assetsb	380		334
	Disputed tax assessmentsc	327		177
	Investments:
	MMRd	—		446
	PT Smeltinge	71		89
	Available-for-sale securities	44		46
	Other	63		51
	Long-term receivable for income tax refunds	77		317
	Loan to a DRC public electric utility	152		149
	Debt issue costs	107		26
	Loan to Gécamines (related party)	34		32
	Deferred tax assets	2		220
	Other	149		139
	Total other assets	$	1,798	$	2,189
	a.	Included $210 million (time deposit that secures a bank guarantee) associated with the Cerro Verde royalty dispute and $158 million for AROs related to properties in New Mexico at December 31, 2013, and $161 million for AROs related to properties in New Mexico at December 31, 2012 (refer to Note 12 for further discussion).
	b.	Intangible assets were net of accumulated amortization totaling $57 million at December 31, 2013, and $71 million at December 31, 2012.
	c.	Included Indonesian disputed tax assessments of $255 million at December 31, 2013, and $148 million at December 31, 2012 (refer to Note 12 for further discussion).
	d.	In December 2010, FCX purchased 500,000 shares of MMR’s 5.75% Convertible Perpetual Preferred Stock for an aggregate purchase price of $500 million, which was recorded at cost and subsequently reduced by dividends. On June 3, 2013, FCX acquired MMR (refer to Note 2 for discussion of the acquisition of MMR).
	e.	FCX's 25 percent ownership in PT Smelting (smelter and refinery in Gresik, Indonesia) is recorded using the equity method. Amounts were reduced by unrecognized profits on sales from PT-FI to PT Smelting totaling $58 million at December 31, 2013, and $39 million at December 31, 2012.

ACCOUNTS_PAYABLE_AND_ACCRUED_L1

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2013
Accounts Payable and Accrued Liabilities, Current [Abstract]	'
Additional information regarding accounts payable and accrued liabilities	'
	Additional information regarding accounts payable and accrued liabilities follows:
		December 31,
		2013		2012
	Accounts payable	$	2,144	$	1,568
	Salaries, wages and other compensation	352		287
	Commodity derivative contracts	205		11
	Accrued interesta	210		35
	Oil and gas royalty and revenue payable	169		—
	Pension, postretirement, postemployment and other employee benefitsb	161		140
	Other accrued taxes	142		92
	Deferred revenue	115		94
	Rio Tinto's share of joint venture cash flows	33		4
	Other	169		93
	Total accounts payable and accrued liabilities	$	3,700	$	2,324
	a.	Third-party interest paid, net of capitalized interest, was $397 million in 2013, $111 million in 2012 and $225 million in 2011.
	b.	Refer to Note 9 for long-term portion.

DEBT_Tables

DEBT (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of debt instruments	'
	The components of debt follow:
		December 31,
		2013			2012
	Revolving credit facility	$	—		$	—
	Lines of credit	—			—
	Bank term loan	4,000			—
	Senior notes and debentures:
	Issued by FCX:
	1.40% Senior Notes due 2015	500			500
	2.15% Senior Notes due 2017	500			500
	2.375% Senior Notes due 2018	1,500			—
	3.100% Senior Notes due 2020	999			—
	3.55% Senior Notes due 2022	1,996			1,995
	3.875% Senior Notes due 2023	1,999			—
	5.450% Senior Notes due 2043	1,991			—
	Issued by FM O&G:
	6.125% Senior Notes due 2019	817			—
	8.625% Senior Notes due 2019	447			—
	7.625% Senior Notes due 2020	336			—
	6½% Senior Notes due 2020	1,647			—
	6.625% Senior Notes due 2021	659			—
	6.75% Senior Notes due 2022	1,111			—
	6⅞% Senior Notes due 2023	1,686			—
	Issued by FMC:
	71/8% Debentures due 2027	115			115
	9½% Senior Notes due 2031	130			130
	61/8% Senior Notes due 2034	115			115
	Other (including equipment capital leases and short-term borrowings)	158			172
	Total debt	20,706			3,527
	Less current portion of debt	(312		)	(2		)
	Long-term debt	$	20,394		$	3,525

OTHER_LIABILITIES_INCLUDING_EM1

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Tables)	12 Months Ended
	Dec. 31, 2013
Other Liabilities, Including Employee Benefits [Abstract]	'
Additional information regarding other liabilities	'
	Information regarding other liabilities follows:
		December 31,
		2013			2012
	Pension, postretirement, postemployment and other employment benefitsa	$	1,225		$	1,340
	Commodity derivative contracts	115			—
	Reserve for uncertain tax benefits	87			107
	Other	263			197
	Total other liabilities	$	1,690		$	1,644
	a.	Refer to Note 7 for current portion.
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]	'
	Included in accumulated other comprehensive loss are the following amounts that have not been recognized in net periodic pension cost as of December 31:
		2013						2012
		Before Taxes			After Taxes and Noncontrolling Interests			Before Taxes			After Taxes and Noncontrolling Interests
	Prior service costs (credits)	$	32		$	17		$	(2	)	$	(1	)
	Net actuarial loss	542			326			705			429
		$	574		$	343		$	703		$	428
Schedule of defined benefit plans disclosure	'
	The expected benefit payments for FCX’s and PT-FI’s pension plans follow:
		FCX			PT-FIa
	2014	$	93		$	21
	2015	147			12
	2016	99			13
	2017	102			18
	2018	106			21
	2019 through 2023	584			194
	a.	Based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar.
	FCX uses a measurement date of December 31 for its plans. Information for those plans where the accumulated benefit obligations exceed the fair value of plan assets follows:
		December 31,
		2013			2012
	Projected benefit obligation	$	2,180		$	2,247
	Accumulated benefit obligation	1,933			2,031
	Fair value of plan assets	1,490			1,443
	Information on the FCX (including FMC’s plans and FCX’s SERP plans) and PT-FI plans as of December 31 follows:
		FCX						PT-FI
		2013			2012			2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning
	of year	$	1,954		$	1,791		$	240		$	206
	Service cost	30			27			20			17
	Interest cost	77			79			14			14
	Actuarial (gains) losses	(103		)	142			13			25
	Plan amendment	—			—			33			—
	Foreign exchange losses (gains)	1			1			(53		)	(13		)
	Benefits paid	(88		)	(86		)	(8		)	(9		)
	Benefit obligation at end of year	1,871			1,954			259			240
	Change in plan assets:
	Fair value of plan assets at
	beginning of year	1,300			1,141			130			107
	Actual return on plan assets	112			140			(3		)	12
	Employer contributionsa	26			105			35			26
	Foreign exchange losses	—			—			(30		)	(6		)
	Benefits paid	(88		)	(86		)	(8		)	(9		)
	Fair value of plan assets at end
	of year	1,350			1,300			124			130
	Funded status	$	(521	)	$	(654	)	$	(135	)	$	(110	)
	Accumulated benefit obligation	$	1,742		$	1,842		$	141		$	136
	Weighted-average assumptions
	used to determine benefit obligations:
	Discount rate	5		%	4.1		%	9		%	6.25		%
	Rate of compensation increaseb	3.75		%	3.75		%	10		%	8		%
	Balance sheet classification of
	funded status:
	Other assets	$	8		$	7		$	—		$	—
	Accounts payable and
	accrued liabilities	(4		)	(4		)	—			—
	Other liabilities	(525		)	(657		)	(135		)	(110		)
	Total	$	(521	)	$	(654	)	$	(135	)	$	(110	)
	a.	Employer contributions for 2014 are expected to approximate $5 million for the FCX plans and $22 million for the PT-FI plan (based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar).
	b.	The rate of compensation increase shown for the PT-FI plan in 2013 related to non-staff employees (staff employees was 8 percent).
	The weighted-average assumptions used to determine net periodic benefit cost and the components of net periodic benefit cost for FCX’s pension plans for the years ended December 31 follow:
		2013			2012			2011
	Weighted-average assumptions:a
	Discount rate	4.1		%	4.6		%	5.4		%
	Expected return on plan assets	7.5		%	7.5		%	8		%
	Rate of compensation increase	3.75		%	3.75		%	3.75		%
	Service cost	$	30		$	27		$	24
	Interest cost	77			79			83
	Expected return on plan assets	(95		)	(86		)	(86		)
	Amortization of prior service cost	—			(1		)	(1		)
	Amortization of net actuarial losses	38			33			19
Net periodic benefit cost	$	50		$	52		$	39
a.	The assumptions shown relate only to the FMC plans.
The weighted-average assumptions used to determine net periodic benefit cost and the components of net periodic benefit cost for PT-FI’s pension plan for the years ended December 31 follow:
	2013			2012			2011
Weighted-average assumptions:
Discount rate	6.25		%	7		%	8.5		%
Expected return on plan assets	7.5		%	9.25		%	9.25		%
Rate of compensation increase	8		%	8		%	8		%
Service cost	$	20		$	17		$	13
Interest cost	14			14			11
Expected return on plan assets	(10		)	(9		)	(9		)
Amortization of prior service cost	—			1			1
Amortization of net actuarial loss	8			7			3
Net periodic benefit cost	$	32		$	30		$	19
Information on the postretirement benefit plans as of December 31 follows:
	2013			2012
Change in benefit obligation:
Benefit obligation at beginning of year	$	213		$	223
Service cost	1			1
Interest cost	7			9
Actuarial (gains) losses	(24		)	2
Plan amendments and acquisition	6			—
Benefits paid, net of employee and joint venture partner
contributions, and Medicare Part D subsidy	(21		)	(22		)
Benefit obligation at end of year	182			213
Change in plan assets:
Fair value of plan assets at beginning of year	—			—
Employer and joint venture partner contributions	23			25
Employee contributions	11			10
Benefits paid	(34		)	(35		)
Fair value of plan assets at end of year	—			—
Funded status	$	(182	)	$	(213	)
Discount rate assumption	4.3		%	3.5		%
Balance sheet classification of funded status:
Accounts payable and accrued liabilities	$	(19	)	$	(21	)
Other liabilities	(163		)	(192		)
Total	$	(182	)	$	(213	)
Schedule of fair value of financial assets for pension and postretirement benefits	'
	A summary of the fair value hierarchy for pension plan assets associated with the PT-FI plan follows:
		Fair Value at December 31, 2013
		Total			Level 1			Level 2			Level 3
	Common stocks	$	27		$	27		$	—		$	—
	Government bonds	23			23			—			—
	Mutual funds	12			12			—			—
	Total investments	62			$	62		$	—		$	—
	Cash and receivablesa	62
	Total pension plan net assets	$	124
		Fair Value at December 31, 2012
		Total			Level 1			Level 2			Level 3
	Common stocks	$	32		$	32		$	—		$	—
	Government bonds	27			27			—			—
	Mutual funds	10			10			—			—
	Total investments	69			$	69		$	—		$	—
	Cash and receivablesa	61
	Total pension plan net assets	$	130
	a.	Cash consisted primarily of short-term time deposits.
	A summary of the fair value hierarchy for pension plan assets associated with the FCX plans follows:
		Fair Value at December 31, 2013
		Total			Level 1			Level 2			Level 3
	Commingled/collective funds:
	Global equity	$	623		$	—		$	623		$	—
	U.S. small-cap equity	65			—			65			—
	Real estate property	47			—			—			47
	U.S. real estate securities	40			—			40			—
	Fixed income debt securities	30			—			30			—
	Short-term investments	5			—			5			—
	Open-ended mutual funds:
	Government bonds	43			43			—			—
	Emerging markets equity	41			41			—			—
	Corporate bonds	33			33			—			—
	Mutual funds:
	Foreign bonds	51			51			—			—
	Emerging markets equity	26			26			—			—
	Emerging markets bond	20			20			—			—
	Fixed income:
	Government bonds	198			—			198			—
	Corporate bonds	52			—			52			—
	Private equity investments	43			—			—			43
	Other investments	29			1			28			—
	Total investments	1,346			$	215		$	1,041		$	90
	Cash and receivables	18
	Payables	(14		)
	Total pension plan net assets	$	1,350
		Fair Value at December 31, 2012
		Total			Level 1			Level 2			Level 3
	Commingled/collective funds:
	Global equity	$	481		$	—		$	481		$	—
	U.S. real estate securities	61			—			61			—
	U.S. small-cap equity	52			—			52			—
	Real estate property	41			—			—			41
	Short-term investments	40			—			40			—
	Open-ended mutual funds:
	Government bonds	48			48			—			—
	Emerging markets equity	41			41			—			—
	Corporate bonds	23			23			—			—
	Mutual funds:
	Foreign bonds	54			54			—			—
	Emerging markets bond	37			37			—			—
	Emerging markets equity	28			28			—			—
	Fixed income:
	Government bonds	241			—			241			—
Corporate bonds	82			—			82			—
Private equity investments	45			—			—			45
Other investments	33			1			32			—
Total investments	1,307			$	232		$	989		$	86
Cash and receivables	5
Payables	(12		)
Total pension plan net assets	$	1,300
Summary of changes in the fair value of level 3 pension plan assets	'
	A summary of changes in the fair value of FCX’s Level 3 pension plan assets for the years ended December 31 follow:
		Private			Real			Total
		Equity			Estate
		Investments			Property
	Balance at January 1, 2012	$	50		$	35		$	85
	Actual return on plan assets:
	Realized gains	—			2			2
	Net unrealized (losses) gains related to
	assets still held at the end of the year	(5		)	4			(1		)
	Purchases	4			—			4
	Settlements, net	(4		)	—			(4		)
	Balance at December 31, 2012	45			41			86
	Actual return on plan assets:
	Realized gains	—			1			1
	Net unrealized (losses) gains related to
	assets still held at the end of the year	(1		)	6			5
	Purchases	3			—			3
	Sales	—			(1		)	(1		)
	Settlements, net	(4		)	—			(4		)
	Balance at December 31, 2013	$	43		$	47		$	90

STOCKHOLDERS_EQUITY_AND_STOCKB1

STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	A summary of changes in the balances of each component of accumulated other comprehensive loss follows:
		Unrealized Losses on Securities				Translation Adjustment				Defined Benefit Plans				Deferred Tax Valuation Allowance			Total
	Balance at January 1, 2011	$	(3	)		$	8			$	(269	)		$	(59	)	$	(323	)
	Amounts arising during the perioda,b	(1		)		(2		)		(134		)		(20		)	(157		)
	Amounts reclassifiedc	—				—				15				—			15
	Balance at December 31, 2011	(4		)		6				(388		)		(79		)	(465		)
	Amounts arising during the perioda,b	—				(1		)		(65		)		(1		)	(67		)
	Amounts reclassifiedc	—				—				26				—			26
	Balance at December 31, 2012	(4		)		5				(427		)		(80		)	(506		)
	Amounts arising during the perioda,b	(1		)		—				67				—			66
	Amounts reclassifiedc	—				5				30				—			35
	Balance at December 31, 2013	$	(5	)		$	10			$	(330	)		$	(80	)	$	(405	)
	a.	Included net actuarial gains (losses), net of noncontrolling interest, totaling $(215) million for 2011, $(103) million for 2012 and $137 million for 2013. The year 2013 also included $33 million for prior service costs.
	b.	Included tax benefits (provision) totaling $81 million for 2011, $39 million for 2012 and $(37) million for 2013.
	c.	Included amortization primarily related to actuarial losses that were net of taxes of $8 million for 2011, $15 million for 2012 and $17 million for 2013.
Compensation costs charged against earnings	'
	Compensation cost charged against earnings for stock-based awards for the years ended December 31 follows:
			2013				2012				2011
	Selling, general and administrative expenses		$	145			$	77			$	90
	Production and delivery		28				23				25
	Capitalized costs		13				—				—
	Total stock-based compensation		186				100				115
	Less: capitalized costs		(13		)		—				—
	Tax benefit and noncontrolling interests' shares		(66		)		(39		)		(46		)
	Impact on net income		$	107			$	61			$	69
Summary of stock options and SARs outstanding and changes during the period	'
	A summary of options and SARs outstanding as of December 31, 2013, including 1,927,037 SARs, and changes during the year ended December 31, 2013, follows:
		Number of			Weighted-				Weighted-		Aggregate
		Options and SARs			Average				Average		Intrinsic
					Exercise Price				Remaining		Value
									Contractual
									Term (years)
	Balance at January 1	31,472,559			$	37.4
	Conversion of MMR options	7,203,392			27.64
	Conversion of PXP SARs	2,374,601			27.34
	Granted	5,479,930			35
	Exercised	(976,220	)		18.77
	Expired/Forfeited	(423,601	)		41.83
	Balance at December 31	45,130,661			35.39				5.6		$	239
	Vested and exercisable at December 31	31,748,346			$	33.4			4.7		$	210
	Summaries of options and SARs outstanding and changes during the years ended December 31 follow:
		2012							2011
		Number of			Weighted-				Number of			Weighted-
		Options and SARs			Average				Options and SARs			Average
					Exercise							Exercise
					Price							Price
	Balance at January 1	27,967,145			$	34.9			26,930,444			$	30.22
	Granted	5,050,500			46.32				4,230,500			55.43
	Exercised	(1,300,273	)		16.68				(3,044,174	)		21.88
	Expired/Forfeited	(244,813	)		45.23				(149,625	)		37.61
	Balance at December 31	31,472,559		a	37.4				27,967,145		a	34.9
	a.	Included 39,336 SARs at December 31, 2012, and 69,672 SARs at December 31, 2011.
Weighted average assumptions used to value stock option awards	'
	Information related to stock options during the years ended December 31 follows:
		2013				2012				2011
	Weighted-average assumptions used to value stock option awards:
	Expected volatility	48.9		%		52		%		50.9		%
	Expected life of options (in years)	4.66				4.54				4.34
	Expected dividend rate	3.3		%		3.1		%		1.8		%
	Risk-free interest rate	0.7		%		0.7		%		1.6		%
	Weighted-average grant date fair value (per share)	$	10.98			$	15.6			$	20.58
	Intrinsic value of options exercised	$	10			$	34			$	101
	Fair value of options vested	$	101			$	77			$	89
Summary Of Outstanding Restricted Stock Units	'
	A summary of outstanding stock-settled RSUs as of December 31, 2013, and activity during the year ended December 31, 2013, follows:
		Number of Stock-Settled RSUs			Weighted-Average Grant-Date Fair Value				Weighted-		Aggregate
									Average		Intrinsic
									Remaining		Value
									Contractual
									Term (years)
	Balance at January 1	889,698			$	44.35
	Granted	2,492,600			34.84
	Conversion of PXP and MMR RSUs	1,252,185			31.05
	Vested	(356,275	)		41.96
	Forfeited	(22,732	)		31.92
	Balance at December 31	4,255,476			35.13				4.1		$	161
Summary of Outstanding Cash Settled Restricted Stock Units	'
	A summary of outstanding cash-settled RSUs as of December 31, 2013, and activity from June 1, 2013, to December 31, 2013, follows:
		Number of Cash-Settled RSUs			Weighted-Average Grant-Date Fair Value				Weighted-		Aggregate
									Average		Intrinsic
									Remaining		Value
									Contractual
									Term (years)
	Conversion of PXP RSUs	2,259,708			$	31.05
	Granted	1,430			32.94
	Vested	(1,430	)		31.05
	Forfeited	(39,896	)		31.05
	Balance at December 31	2,219,812			31.05				1.9		$	84
Schedule of amounts related to exercises of stock options and stock appreciation rights and the vesting of restricted stock units and restricted stock awards	'
	The following table includes amounts related to exercises of stock options and vesting of RSUs during the years ended December 31:
		2013				2012				2011
	FCX shares tendered to pay the exercise price
	and/or the minimum required taxesa	3,294,624				515,558				936,811
	Cash received from stock option exercises	$	8			$	15			$	48
	Actual tax benefit realized for tax deductions	$	8			$	16			$	45
	Amounts FCX paid for employee taxes	$	105			$	16			$	45
	a.	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.

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income before income taxes and equity in affiliated companies' net earnings	'
	Geographic sources of income before income taxes and equity in affiliated companies’ net earnings for the years ended December 31 consist of the following:
		2013				2012				2011
	United States	$	1,104			$	1,539			$	2,112
	Foreign	3,809				3,948				6,706
	Total	$	4,913			$	5,487			$	8,818
Provision for (benefit from) income taxes	'
	FCX’s provision for income taxes for the years ended December 31 consists of the following:
		2013				2012				2011
	Current income taxes:
	Federal	$	203			$	238			$	394
	State	9				7				21
	Foreign	1,081				1,002				1,934
	Total current	1,293				1,247				2,349
	Deferred income taxes (benefits):
	Federal	234				87				82
	State	(35		)		18				(19		)
	Foreign	346				363				622
	Total deferred	545				468				685
	Adjustments	(199		)	a	(205		)	b,c	53			d
	Federal operating loss carryforwards	(164		)	e	—				—
	Provision for income taxes	$	1,475			$	1,510			$	3,087
	a.	As a result of the oil and gas acquisitions, FCX recognized a net tax benefit of $199 million consisting of income tax benefits of $190 million associated with net reductions in FCX's valuation allowances, $69 million related to the release of the deferred tax liability on PXP's investment in MMR common stock and $16 million associated with the revaluation of state deferred tax liabilities, partially offset by income tax expense of $76 million associated with the write off of deferred tax assets related to environmental liabilities.
	b.	In 2012, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde) signed a new 15-year mining stability agreement with the Peruvian government, which became effective January 1, 2014. In connection with the new mining stability agreement, Cerro Verde's income tax rate increased from 30 percent to 32 percent, and FCX recognized additional deferred tax expense of $29 million.
	c.	With the exception of TFM, FCX has not elected to permanently reinvest earnings from its foreign subsidiaries and has recorded deferred tax liabilities for foreign earnings that are available to be repatriated to the U.S. Cerro Verde previously recorded deferred Peruvian income tax liabilities for income taxes that would become payable if the reinvested profits used to fund the initial Cerro Verde sulfide expansion were distributed prior to the expiration of Cerro Verde's 1998 stability agreement on December 31, 2013. Because reinvested profits at Cerro Verde were not expected to be distributed prior to December 31, 2013, a net deferred income tax liability of $234 million was reversed and recognized as an income tax benefit in 2012.
	d.	In September 2011, Peru enacted a new mining tax and royalty regime and also created a special mining burden that companies with stability agreements could elect to pay. Cerro Verde elected to pay this special mining burden during the remaining term of its 1998 stability agreement, which expired on December 31, 2013. As a result, Cerro Verde recognized additional tax expense of $53 million in 2011.
	e.	Benefit from the use of federal operating loss carryforwards acquired as part of the oil and gas acquisitions.
Reconciliation of the U.S. federal statutory tax rate to effective income tax rate	'
	A reconciliation of the U.S. federal statutory tax rate to FCX’s effective income tax rate for the years ended December 31 follows:
		2013							2012						2011
		Amount				Percent			Amount				Percent		Amount			Percent
	U.S. federal statutory tax rate	$	1,720			35	%		$	1,920			35	%	$	3,086		35	%
	Foreign tax credit limitation	117				2			110				2		163			2
	Percentage depletion	(223		)		(5	)		(263		)		(5	)	(283		)	(3	)
	Withholding and other impacts on
	foreign earnings	83				2			(221		)	b	(4	)	170			2
	Valuation allowance on minimum
	tax credits	(190		)	a	(4	)		(9		)		—		(47		)	(1	)
	State income taxes	(43		)		—			17				—		—			—
	Other items, net	11			a	—			(44		)		—		(2		)	—
	Provision for income taxes	$	1,475			30	%		$	1,510			28	%	$	3,087		35	%
	a.	Included a net tax benefit of $199 million as a result of the oil and gas acquisitions.
	b.	Included the reversal of Cerro Verde's deferred income tax liability of $234 million.
Components of deferred tax assets and liabilities	'
	The components of deferred taxes follow:
		December 31,
		2013				2012
	Deferred tax assets:
	Foreign tax credits	$	2,144			$	2,022
	Accrued expenses	1,098				819
	Minimum tax credits	603				474
	Net operating loss carryforwards	925				343
	Employee benefit plans	443				315
	Other	557				374
	Deferred tax assets	5,770				4,347
	Valuation allowances	(2,487		)		(2,443		)
	Net deferred tax assets	3,283				1,904
	Deferred tax liabilities:
	Property, plant, equipment and mining development costs	(4,887		)		(4,462		)
	Oil and gas properties	(4,708		)		—
	Undistributed earnings	(936		)		(884		)
	Other	(34		)		(70		)
	Total deferred tax liabilities	(10,565		)		(5,416		)
	Net deferred tax liabilities	$	(7,282	)		$	(3,512	)
Reserve for unrecognized tax benefits, interest and penalties	'
	A summary of the activities associated with FCX’s reserve for unrecognized tax benefits, interest and penalties follows:
		Unrecognized				Interest				Penalties
		Tax Benefits
	Balance at January 1, 2012	$	146			$	34			$	—
	Additions:
	Prior year tax positions	17				*				*
	Current year tax positions	24				*				*
	Interest and penalties	—				3				—
	Decreases:
	Prior year tax positions	(37		)		*				*
	Current year tax positions	—				*				*
	Settlements with tax authorities	(11		)		*				*
	Lapse of statute of limitations	(1		)		*				*
	Interest and penalties	—				(6		)		—
	Balance at December 31, 2012	138				31				—
	Additions:
	Prior year tax positions	18				*				*
	Current year tax positions	14				*				*
	Acquisition of PXP	5				*				*
	Interest and penalties	—				7				—
	Decreases:
	Prior year tax positions	(37		)		*				*
	Current year tax positions	—				*				*
	Settlements with tax authorities	—				*				*
	Lapse of statute of limitations	(28		)		*				*
	Interest and penalties	—				(17		)		—
	Balance at December 31, 2013	$	110			$	21			$	—
	* Amounts not allocated.
Summary of income tax examinations	'
	The tax years for FCX's major tax jurisdictions that remain subject to examination are as follows:
	Jurisdiction		Years Subject to Examination		Additional Open Years
	U.S. Federal		2007-2012		2013
	Indonesia		2005-2008, 2011-2012		2009-2010, 2013
	Peru		2009-2010		2011-2013
	Chile		2011-2012		2013
	Africa		2010-2012		2013

CONTINGENCIES_Tables

CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2013
Contingencies [Abstract]	'
Environmental Loss Contingency Disclosure	'
	A summary of changes in environmental obligations for the years ended December 31 follows:
		2013				2012				2011
	Balance at beginning of year	$	1,222			$	1,453			$	1,422
	Accretion expensea	79				80				88
	Additions	73				70				132
	Reductionsb	(77		)		(182		)		(68		)
	Spending	(130		)		(199		)		(121		)
	Balance at end of year	1,167				1,222				1,453
	Less current portion	(121		)		(186		)		(205		)
	Long-term portion	$	1,046			$	1,036			$	1,248
	a.	Represented accretion of the fair value of environmental obligations assumed in the 2007 acquisition of FMC, which were determined on a discounted cash flow basis.
	b.	Reductions primarily reflected revisions for changes in the anticipated scope and timing of environmental remediation projects and the noncash adjustments of environmental matters.
Asset Retirement Obligation Disclosure	'
	A summary of changes in FCX’s AROs for the years ended December 31 follows:
		2013				2012				2011
	Balance at beginning of year	$	1,146			$	921			$	856
	Liabilities assumed in the acquisitions of PXP and MMRa	1,028				—				—
	Liabilities incurred	45				6				9
	Settlements and revisions to cash flow estimates, net	123				211				48
	Accretion expense	95				55				58
	Spending	(107		)		(47		)		(49		)
	Other	(2		)		—				(1		)
	Balance at end of year	2,328				1,146				921
	Less: current portion	(115		)		(55		)		(31		)
	Long-term portion	$	2,213			$	1,091			$	890
	a.	The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $287 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.
Summary of Income Tax Contingencies [Table Text Block]	'
	PT-FI has received assessments from the Indonesian tax authorities for additional taxes and interest related to various audit exceptions for income taxes and other taxes as follows:
	Date of Assessment		Tax Year		Tax Assessment				Interest Assessment				Total
	Oct-10		2005		$	103			$	49			$	152
	Nov-11		2006		22				10				32
	Mar-12		2007		91				44				135
	First-quarter 2013		2008		62				52				114
	Second-quarter 2013		2011		56				13				69
	Total				$	334			$	168			$	502

FINANCIAL_INSTRUMENTS_Tables

FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2013
Financial Instruments [Abstract]	'
Unrealized gains (losses) for derivative financial instruments that are designated and qualify as fair value hedge transactions and for the related hedged item	'
	A summary of gains (losses) recognized in revenues for derivative financial instruments related to commodity contracts that are designated and qualify as fair value hedge transactions, along with the unrealized gains (losses) on the related hedged item (firm sales commitments) for the years ended December 31 follows:
		2013				2012				2011
	Unrealized gains (losses):
	Derivative financial instruments	$	1			$	15			$	(28	)
	Hedged item	(1		)		(15		)		28
	Realized gains (losses):
	Matured derivative financial instruments	(17		)		(2		)		(28		)
Realized and unrealized gains (losses) for derivative financial instruments that do not qualify as hedge transactions	'
	A summary of the realized and unrealized gains (losses) recognized in income before income taxes and equity in affiliated companies’ net earnings for commodity contracts that do not qualify as hedge transactions, including embedded derivatives, for the years ended December 31 follows:
		2013				2012					2011
	Embedded derivatives in provisional copper and gold
	sales contractsa	$	(136	)		$	77				$	(519	)
	Crude oil optionsa	(344		)		—					—
	Natural gas swapsa	10				—			—		—
	Copper forward contractsb	3				15					(2		)
	a.	Amounts recorded in revenues.
	b.	Amounts recorded in cost of sales as production and delivery costs.
Fair Values of Unsettled Derivative Financial Instruments	'
	A summary of the fair values of unsettled commodity derivative financial instruments follows:
		December 31,
		2013				2012
	Commodity Derivative Assets:
	Derivatives designated as hedging instruments:
	Copper futures and swap contractsa	$	6			$	5
	Derivatives not designated as hedging instruments:
	Embedded derivatives in provisional copper and gold
	sales/purchase contracts	63				36
	Total derivative assets	$	69			$	41
	Commodity Derivative Liabilities:
	Derivatives designated as hedging instruments:
	Copper futures and swap contractsa	$	—			$	1
	Derivatives not designated as hedging instruments:
	Embedded derivatives in provisional copper and gold
	sales/purchase contracts	16				27
	Crude oil optionsb	309				—
	Natural gas swaps	4				—
	Copper forward contracts	1				—
	Total derivative liabilities	$	330			$	28
	a.	FCX had paid $1 million to brokers at December 31, 2013, and $7 million at December 31, 2012, for margin requirements (recorded in other current assets).
	b.	Included $444 million for deferred premiums and accrued interest at December 31, 2013.
	A summary of these unsettled commodity contracts that are offset in the balance sheet follows:
			Assets								Liabilities
			December 31, 2013				December 31, 2012				December 31, 2013			December 31, 2012
	Gross amounts recognized:
	Commodity contracts:
	Embedded derivatives on provisional
	sales/purchase contracts		$	63			$	36			$	16		$	27
	Crude oil and natural gas derivatives		—				—				313			—
	Copper derivatives		6				5				1			1
			69				41				330			28
	Less gross amounts of offset:
	Commodity contracts:
	Embedded derivatives on provisional
	sales/purchase contracts		10				8				10			8
	Crude oil and natural gas derivatives		—				—				—			—
	Copper derivatives		—				—				—			—
			10				8				10			8
	Net amounts presented in balance sheet:
	Commodity contracts:
	Embedded derivatives on provisional
	sales/purchase contracts		53				28				6			19
	Crude oil and natural gas derivatives		—				—				313			—
	Copper derivatives		6				5				1			1
			$	59			$	33			$	320		$	20
	Balance sheet classification:
	Trade accounts receivable		$	53			$	24			$	—		$	9
	Other current assets		6				5				—			—
	Accounts payable and accrued liabilities		—				4				205			11
	Other liabilities		—				—				115			—
			$	59			$	33			$	320		$	20
Schedule of Derivative Instruments	'
	A summary of FCX’s embedded derivatives at December 31, 2013, follows:
		Open			Average Price								Maturities
					Per Unit
		Positions			Contract				Market				Through
	Embedded derivatives in provisional sales contracts:
	Copper (millions of pounds)	673			$	3.24			$	3.34			Jun-14
	Gold (thousands of ounces)	254			1,245				1,202				Apr-14
	Embedded derivatives in provisional purchase contracts:
	Copper (millions of pounds)	60			3.26				3.34				Apr-14
	At December 31, 2013, the outstanding crude oil option contracts, all of which settle monthly, follow:
								Average Price (per barrel)a
	Period		Instrument Type		Daily Volumes (thousand barrels)			Floor				Floor Limit			Average Deferred Premium		Index
															(per barrel)
	2014
	Jan - Dec		Put optionsb		75			$	90			$	70		$	5.74	Brent
	Jan - Dec		Put optionsb		30			95				75			6.09		Brent
	Jan - Dec		Put optionsb		5			100				80			7.11		Brent
	2015
	Jan - Dec		Put optionsb		84			90				70			6.89		Brent
	a.	The average strike prices do not reflect any premiums to purchase the put options.
	b.	If the index price is less than the per barrel floor, FCX receives the difference between the per barrel floor and the index price up to a maximum of $20 per barrel less the option premium. If the index price is at or above the per barrel floor, FCX pays the option premium and no cash settlement is received.

FAIR_VALUE_MEASUREMENT_Tables

FAIR VALUE MEASUREMENT (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	A summary of the changes in the fair value of FCX's Level 3 instruments follows:
		Crude Oil				Plains Offshore
		Options				Warrants
	Fair value at December 31, 2012	$	—			$	—
	Derivative financial instruments assumed in the PXP acquisition	(83		)		(10		)
	Net realized losses	(38		)	a	—
	Net unrealized (losses) gains included in earnings related to	(230		)	b	8			c
	assets and liabilities still held at the end of the period
	Settlement payments	42				—
	Fair value at December 31, 2013	$	(309	)		$	(2	)
	a.	Included net realized losses of $37 million recorded in revenues and $1 million of interest expense associated with the deferred premiums for the seven month period from June 1, 2013, to December 31, 2013.
	b.	Included unrealized losses of $228 million recorded in revenues and $2 million of interest expense associated with the deferred premiums.
	c.	Recorded in other (expense) income, net.
Fair Value Measurement Inputs Disclosure	'
	A summary of the carrying amount and fair value of FCX’s financial instruments other than cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities, and dividends payable follows:
		At December 31, 2013
		Carrying				Fair Value
		Amount				Total				Level 1		Level 2		Level 3
	Assets
	Investment securities (current and long-term):a,b
	U.S. core fixed income fund	$	21			$	21			$	—	$	21	$	—
	Money market funds	18				18				18		—		—
	Equity securities	5				5				5		—		—
	Total	44				44				23		21		—
	Legally restricted funds (long-term):a,b,c
	U.S. core fixed income fund	48				48				—		48		—
	Government mortgage-backed securities	34				34				—		34		—
	Corporate bonds	28				28				—		28		—
	Government bonds and notes	28				28				—		28		—
	Money market funds	28				28				28		—		—
	Asset-backed securities	15				15				—		15		—
	Municipal bonds	1				1				—		1		—
	Total	182				182				28		154		—
	Derivatives:a,d
	Embedded derivatives in provisional sales/purchase
	contracts in a gross asset position	63				63				—		63		—
	Copper futures and swap contracts	6				6				5		1		—
	Total	69				69				5		64		—
	Total assets					$	295			$	56	$	239	$	—
	Liabilities
	Derivatives:a
	Embedded derivatives in provisional sales/purchase
	contracts in a gross liability positiond	$	16			$	16			$	—	$	16	$	—
	Crude oil optionsd	309				309				—		—		309
	Natural gas swaps	4				4				—		4		—
	Copper forward contractsd	1				1				1		—		—
	Plains Offshore warrantse	2				2				—		—		2
	Total	332				332				1		20		311
	Long-term debt, including current portionf	20,706				20,487				—		20,487		—
	Total liabilities					$	20,819			$	1	$	20,507	$	311
		At December 31, 2012
		Carrying				Fair Value
		Amount				Total				Level 1		Level 2		Level 3
	Assets
	Investment securities (current and long-term):
	MMR investmentg	$	446			$	539			$	—	$	539	$	—
	U.S. core fixed income funda,b	22				22				—		22		—
	Money market fundsa,b	16				16				16		—		—
	Equity securitiesa,b	8				8				8		—		—
	Total	492				585				24		561		—
	Legally restricted funds (long-term):a,b
	U.S. core fixed income fund	50				50				—		50		—
	Government mortgage-backed securities	36				36				—		36		—
	Corporate bonds	30				30				—		30		—
	Government bonds and notes	24				24				—		24		—
	Asset-backed securities	15				15				—		15		—
	Money market funds	7				7				7		—		—
	Municipal bonds	1				1				—		1		—
	Total	163				163				7		156		—
	Derivatives:a,d
	Embedded derivatives in provisional sales/purchase
	contracts in a gross asset position	36				36				—		36		—
	Copper futures and swap contracts	5				5				5		—		—
	Total	41				41				5		36		—
	Total assets					$	789			$	36	$	753	$	—
	Liabilities
	Derivatives:a,d
Embedded derivatives in provisional sales/purchase
contracts in a gross liability position	$	27			$	27			$	—	$	27	$	—
Copper futures and swap contracts	1				1				1		—		—
Total	28				28				1		27		—
Long-term debt, including current portionf	3,527				3,589				—		3,589		—
Total liabilities					$	3,617			$	1	$	3,616	$	—
a.	Recorded at fair value.
b.	Current portion included in other current assets and long-term portion included in other assets.
c.	Legally restricted funds excluded $210 million of time deposits (which approximated fair value) at December 31, 2013, associated with the Cerro Verde royalty dispute (refer to Note 12 for further discussion).
d.	Refer to Note 14 for further discussion and balance sheet classifications. At December 31, 2013, crude oil options are net of $444 million for deferred premiums and accrued interest.
e.	Included in other liabilities. Refer to Note 2 for further discussion.
f.	Recorded at cost except for debt assumed in the PXP and FMC acquisitions, which were recorded at fair value at the respective acquisition dates.
g.	Recorded at cost and included in other assets.

BUSINESS_SEGMENTS_Tables

BUSINESS SEGMENTS (Tables)	12 Months Ended
	Dec. 31, 2013
Business Segments [Abstract]	'
Revenues by product	'
	FCX revenues attributable to the products it produced for the years ended December 31 follow:
		2013				2012			2011
	Refined copper products	$	7,466			$	9,699		$	10,297
	Copper in concentratesa	7,040				4,589			5,938
	Gold	1,656				1,741			2,429
	Molybdenum	1,110				1,187			1,348
	Oil	2,310				—			—
	Other	1,339				794			868
	Total	$	20,921			$	18,010		$	20,880
	a.	Amounts are net of treatment and refining charges totaling $400 million for 2013, $311 million for 2012 and $362 million for 2011.
Revenues by geographic area of customer	'
	Information concerning financial data by geographic area follows:
		Years Ended December 31,
		2013				2012			2011
	Revenues:a
	United States	$	9,418			$	6,285		$	7,176
	Japan	2,141				2,181			2,501
	Indonesia	1,651				2,054			2,266
	Spain	1,223				1,581			1,643
	Switzerland	1,098				731			1,219
	China	1,078				579			942
	Chile	754				704			741
	Korea	297				525			561
	Other	3,261				3,370			3,831
	Total	$	20,921			$	18,010		$	20,880
	a.	Revenues are attributed to countries based on the location of the customer.
Long-lived assets by geographic area	'
		December 31,
		2013				2012			2011
	Long-lived assets:a
	United States	$	32,969		b	$	8,689		$	7,899
	Indonesia	5,799				5,127			4,469
	Democratic Republic of Congo	3,994				3,926			3,497
	Peru	5,181				3,933			3,265
	Chile	2,699				2,587			2,242
	Other	562				327			325
	Total	$	51,204			$	24,589		$	21,697
	a.	Long-lived assets exclude deferred tax assets, intangible assets and goodwill.
	b.	Increased primarily because of the PXP and MMR acquisitions.
Schedule of Segment Reporting Information By Segment	'
	Business segments data for the years ended December 31 are presented in the following tables.
	Business Segments
	(In millions)	Mining Operations
		North America Copper Mines										South America									Indonesia				Africa
																															Atlantic				Other										Corporate,
																											Molyb-				Copper				Mining							U.S.			Other
						Other						Cerro			Candel-		Other										denum		Rod &		Smelting				& Elimi-				Total			Oil & Gas			& Elimi-				FCX
		Morenci				Mines			Total			Verde			aria		Mines		Total		Grasberg				Tenke		Mines		Refining		& Refining				nations				Mining			Operations			nations				Total
	Year Ended December 31, 2013
	Revenues:
	Unaffiliated customers	$	244			$	326		$	570		$	1,473		$	1,155	$	1,224	$	3,852	$	3,751		a	$	1,590	$	—	$	4,995	$	2,027			$	1,516		b	$	18,301		$	2,616	c	$	4			$	20,921
	Intersegment	1,673				2,940			4,613			360			273		—		633		336				47		522		27		14				(6,192		)		—			—			—				—
	Production and delivery	1,233				2,033			3,266			781			700		588		2,069		2,309				754		317		4,990		2,054				(4,608		)		11,151			682			7				11,840
	Depreciation, depletion and amortization	133				269			402			152			69		125		346		247				246		82		9		42				48				1,422			1,364			11				2,797
	Selling, general and administrative expenses	2				3			5			3			2		2		7		110				12		—		—		20				29				183			120			354				657
	Mining exploration and research expenses	—				5			5			—			—		—		—		1				—		—		—		—				193				199			—			11				210
	Environmental obligations and shutdown costs	—				(1		)	(1		)	—			—		—		—		—				—		—		—		—				67				66			—			—				66
	Operating income (loss)	549				957			1,506			897			657		509		2,063		1,420				625		123		23		(75		)	d	(405		)		5,280			450			(379		)		5,351
	Interest expense, net	3				1			4			2			—		1		3		12				2		—		—		16				80				117			181			220				518
	Provision for income taxes	—				—			—			316			236		168		720		603				131		—		—		—				—				1,454			—			21			e	1,475
	Total assets at December 31, 2013	3,110				5,810			8,920			6,584			1,545		2,451		10,580		7,437				4,849		2,107		239		1,039				1,003				36,174			26,252			1,047				63,473
	Capital expenditures	737				329			1,066			960			110		75		1,145		1,030				205		164		4		67				113				3,794			1,436			56				5,286
	Year Ended December 31, 2012
	Revenues:
	Unaffiliated customers	$	156			$	46		$	202		$	1,767		$	797	$	1,346	$	3,910	$	3,611		a	$	1,349	$	—	$	4,989	$	2,683			$	1,259		b	$	18,003		$	—		$	7			$	18,010
	Intersegment	1,846				3,438			5,284			388			430		—		818		310				10		529		27		26				(7,004		)		—			—			—				—
	Production and delivery	1,076				1,857			2,933			813			702		599		2,114		2,349				615		320		4,993		2,640				(5,585		)		10,379			—			3				10,382
	Depreciation, depletion and amortization	122				238			360			139			32		116		287		212				176		59		9		42				27				1,172			—			7				1,179
	Selling, general and administrative expenses	2				2			4			3			1		2		6		121				6		—		—		19				18				174			—			257				431
	Mining exploration and research expenses	1				—			1			—			—		—		—		—				—		—		—		—				272				273			—			12				285
	Environmental obligations and shutdown costs	(11		)		(5		)	(16		)	—			—		—		—		—				—		—		—		—				(3		)		(19		)	—			(3		)		(22		)
	Gain on insurance settlement	—				—			—			—			—		—		—		(59		)		—		—		—		—				—				(59		)	—			—				(59		)
	Operating income (loss)	812				1,392			2,204			1,200			492		629		2,321		1,298				562		150		14		8				(474		)		6,083			—			(269		)		5,814
	Interest expense, net	1				—			1			7			—		—		7		5				1		—		—		12				81				107			—			79				186
	Provision for income taxes	—				—			—			228		f	141		188		557		497				112		—		—		—				—				1,166			—			344				1,510
	Total assets at December 31, 2012	2,445				5,703			8,148			5,821			1,853		2,489		10,163		6,591				4,622		2,018		242		992				614				33,390			—			2,050				35,440
	Capital expenditures	266				559			825			558			259		114		931		843				539		245		6		16				69				3,474			—			20				3,494
	a.	Included PT-FI's sales to PT Smelting totaling $1.7 billion in 2013 and $2.1 billion in 2012.
	b.	Included revenues from FCX's molybdenum sales company, which included sales of molybdenum produced by the molybdenum mines and by certain of the North and South America copper mines.
	c.	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.
	d.	Included $50 million for shutdown costs associated with Atlantic Copper's scheduled 68-day maintenance turnaround, which was completed in fourth-quarter 2013.
	e.	Included $199 million of net benefits resulting from oil and gas acquisitions.
	f.	Included a credit of $234 million for the reversal of a net deferred tax liability.
	(In millions)	Mining Operations
		North America Copper Mines										South America									Indonesia				Africa
																															Atlantic				Other										Corporate,
																											Molyb-				Copper				Mining							U.S.			Other
						Other						Cerro			Candel-		Other										denum		Rod &		Smelting				& Elimi-				Total			Oil & Gas			& Elimi-				FCX
		Morenci				Mines			Total			Verde			aria		Mines		Total		Grasberg				Tenke		Mines		Refining		& Refining				nations				Mining			Operations			nations				Total
	Year Ended December 31, 2011
	Revenues:
	Unaffiliated customers	$	418			$	176		$	594		$	2,115		$	1,265	$	1,192	$	4,572	$	4,504		a	$	1,282	$	—	$	5,523	$	2,969			$	1,428		b	$	20,872		$	—		$	8			$	20,880
	Intersegment	1,697				3,338			5,035			417			269		—		686		542				7		595		26		15				(6,906		)		—			—			—				—
	Production and delivery	984				1,581			2,565			827			644		434		1,905		1,791				591		259		5,527		2,991				(5,728		)		9,901			—			(3		)		9,898
	Depreciation, depletion and amortization	116				162			278			135			28		95		258		215				140		45		8		40				31				1,015			—			7				1,022
	Selling, general and administrative expenses	2				2			4			4			1		2		7		124				8		—		—		22				19				184			—			231				415
	Mining exploration and research expenses	7				—			7			—			—		—		—		—				—		—		—		—				264				271			—			—				271
	Environmental obligations and shutdown costs	4				—			4			—			—		—		—		—				—		—		1		—				129				134			—			—				134
	Operating income (loss)	1,002				1,769			2,771			1,566			861		661		3,088		2,916				550		291		13		(69		)		(193		)		9,367			—			(227		)		9,140
	Interest expense, net	2				2			4			1			—		—		1		8				6		—		—		15				87				121			—			191				312
	Provision for income taxes	—				—			—			553			310		212		1,075		1,256				120		—		—		—				—				2,451			—			636				3,087
	Total assets at December 31, 2011	2,006				4,968			6,974			5,110			1,384		2,220		8,714		5,349				3,890		1,819		259		1,109				892				29,006			—			3,064				32,070
	Capital expenditures	95				399			494			198			178		227		603		648				193		438		10		32				59				2,477			—			57				2,534
a.	Included PT-FI's sales to PT Smelting totaling $2.3 billion.
b.	Included revenues from FCX's molybdenum sales company, which included sales of molybdenum produced by the molybdenum mines and by certain of the North and South America copper mines.

GUARANTOR_FINANCIAL_STATEMENTS1

GUARANTOR FINANCIAL STATEMENTS (Tables)	12 Months Ended
	Dec. 31, 2013
Guarantor Financial Statements [Abstract]	'
Condensed Balance Sheet [Table Text Block]	'
	CONDENSED CONSOLIDATING BALANCE SHEET
	31-Dec-13
		FCX				FM O&G LLC			Non-guarantor						Consolidated
		Issuer				Guarantor			Subsidiaries			Eliminations			FCX
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—			$	—		$	1,985		$	—		$	1,985
	Accounts receivable	855				659			2,258			(1,210		)	2,562
	Inventories	—				18			5,000			—			5,018
	Other current assets	114				20			273			—			407
	Total current assets	969				697			9,516			(1,210		)	9,972
	Property, plant, equipment and mining development costs, net	27				43			23,972			—			24,042
	Oil and gas properties, net - full cost method:
	Subject to amortization	—				6,207			6,265			—			12,472
	Not subject to amortization	—				2,649			8,238			—			10,887
	Investment in consolidated subsidiaries	31,162				9,712			12,468			(53,342		)	—
	Goodwill	—				437			1,479			—			1,916
	Other assets	7,126				4,640			4,128			(11,710		)	4,184
	Total assets	$	39,284			$	24,385		$	66,066		$	(66,262	)	$	63,473
	LIABILITIES AND EQUITY
	Current liabilities	$	1,003			$	758		$	4,222		$	(1,210	)	$	4,773
	Long-term debt, less current portion	13,184				7,199			8,056			(8,045		)	20,394
	Deferred income taxes	4,137			a	—			3,273			—			7,410
	Environmental and asset retirement obligations, less current portion	—				301			2,958			—			3,259
	Other liabilities	26				3,436			1,893			(3,665		)	1,690
	Total liabilities	18,350				11,694			20,402			(12,920		)	37,526
	Redeemable noncontrolling interest	—				—			716			—			716
	Equity:
	Stockholders' equity	20,934				12,691			41,100			(53,791		)	20,934
	Noncontrolling interests	—				—			3,848			449			4,297
	Total equity	20,934				12,691			44,948			(53,342		)	25,231
	Total liabilities and equity	$	39,284			$	24,385		$	66,066		$	(66,262	)	$	63,473
	a.	All U.S. related deferred income taxes are recorded at the parent company.
Condensed Income Statement [Table Text Block]	'
	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
	Year Ended December 31, 2013
		FCX				FM O&G LLC			Non-guarantor						Consolidated
		Issuer				Guarantor			Subsidiaries			Eliminations			FCX
	Revenues	$	—			$	1,177		$	19,744		$	—		$	20,921
	Cost of sales	5				976			13,656			—			14,637
	Other operating costs and expenses	129				89			715			—			933
	Total costs and expenses	134				1,065			14,371			—			15,570
	Operating (loss) income	(134		)		112			5,373			—			5,351
	Interest expense, net	(319		)		(129		)	(129		)	59			(518		)
	Losses on early extinguishment of debt	(45		)		—			10			—			(35		)
	Gain on investment in MMR	128				—			—			—			128
	Other income (expense), net	61				—			(15		)	(59		)	(13		)
	(Loss) income before income taxes and equity in affiliated companies' net earnings (losses)	(309		)		(17		)	5,239			—			4,913
	Benefit from (provision for) income taxes	81				17			(1,573		)	—			(1,475		)
	Equity in affiliated companies' net earnings (losses)	2,886				281			268			(3,432		)	3
	Net income (loss)	2,658				281			3,934			(3,432		)	3,441
	Net income and preferred dividends attributable to noncontrolling interests	—				—			(706		)	(77		)	(783		)
	Net income (loss) attributable to FCX common stockholders	$	2,658			$	281		$	3,228		$	(3,509	)	$	2,658
	Other comprehensive income	—				—			101			—			101
	Total comprehensive income (loss)	$	2,658			$	281		$	3,329		$	(3,509	)	$	2,759
Condensed Cash Flow Statement [Table Text Block]	'
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	Year Ended December 31, 2013
		FCX				FM O&G LLC			Non-guarantor						Consolidated
		Issuer				Guarantor			Subsidiaries			Eliminations			FCX
	Cash flow from operating activities:
	Net income (loss)	$	2,658			$	281		$	3,934		$	(3,432	)	$	3,441
	Adjustments to reconcile net income (loss) to net cash provided by operating activities:
	Depreciation, depletion and amortization	4				616			2,177			—			2,797
	Net losses on crude oil and natural gas derivative contracts	—				334			—			—			334
	Gain on investment in MMR	(128		)		—			—			—			(128		)
	Equity in earnings of consolidated subsidiaries	(2,886		)		(281		)	(265		)	3,432			—
	Other, net	8				(14		)	78			—			72
	(Increases) decreases in working capital and changes in other tax payments, excluding amounts from the acquisitions	272				735			(1,384		)	—			(377		)
	Net cash (used in) provided by operating activities	(72		)		1,671			4,540			—			6,139
	Cash flow from investing activities:
	Capital expenditures	—				(894		)	(4,392		)	—			(5,286		)
	Acquisitions, net of cash acquired	(5,437		)		—			(4		)	—			(5,441		)
	Intercompany loans	834				—			(162		)	(672		)	—
	Distributions from consolidated subsidiary	629				—			—			(629		)	—
	Other, net	15				30			(226		)	—			(181		)
	Net cash used in investing activities	(3,959		)		(864		)	(4,784		)	(1,301		)	(10,908		)
	Cash flow from financing activities:
	Proceeds from debt	11,260				—			241			—			11,501
	Repayments of debt and redemption of MMR preferred stock	(4,737		)		(416		)	(551		)	—			(5,704		)
	Intercompany loans	—				(391		)	(281		)	672			—
	Cash dividends and distributions paid	(2,281		)		—			(885		)	629			(2,537		)
	Other, net	(211		)		—			—			—			(211		)
	Net cash provided by (used in) financing activities	4,031				(807		)	(1,476		)	1,301			3,049
	Net decrease in cash and cash equivalents	—				—			(1,720		)	—			(1,720		)
	Cash and cash equivalents at beginning of year	—				—			3,705			—			3,705
	Cash and cash equivalents at end of year	$	—			$	—		$	1,985		$	—		$	1,985

QUARTERLY_FINANCIAL_INFORMATIO1

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly financial information	'
		First			Second			Third			Fourth			Year
		Quarter			Quarter			Quarter			Quarter
	2013
	Revenues	$	4,583		$	4,288	a	$	6,165	a	$	5,885	a	$	20,921	a
	Operating income	1,355		b	639		b	1,707		b	1,650		b,c	5,351		b,c
	Net income	824			610		e	1,048			959		e	3,441		e
	Net income attributable to noncontrolling
	interests	176			128			227			252			783
	Net income attributable to FCX common
	stockholders	648		b,d	482		a,b,d,e,f	821		a,b	707		a,b,c,d,e	2,658		a,b,c,d,e,f
	Basic net income per share attributable
	to FCX common stockholders	0.68			0.49			0.79			0.68			2.65
	Diluted net income per share attributable
	to FCX common stockholders	0.68		b,d	0.49		a,b,d,e,f	0.79		a,b	0.68		a,b,c,d,e	2.64		a,b,c,d,e,f
	2012
	Revenues	$	4,605		$	4,475		$	4,417		$	4,513		$	18,010
	Operating income	1,734			1,311			1,411			1,358		g,h	5,814		g,h
	Net income	1,001			894			1,140		i	945			3,980		i
	Net income attributable to noncontrolling
	interests	237			184			316		i	202			939		i
	Net income attributable to FCX common
	stockholders	764		j	710			824		i	743		g,h	3,041		g,h,i,j
	Basic net income per share attributable
	to FCX common stockholders	0.81			0.75			0.87			0.78			3.2
	Diluted net income per share attributable
	to FCX common stockholders	0.8		j	0.74			0.86		i	0.78		g,h	3.19		g,h,i,j
	a.	Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.
	b.	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.
	c.	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.
	d.	Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.
	e.	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
	f.	Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.
	g.	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.
	h.	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.
	i.	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.
	j.	Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

SUPPLEMENTARY_MINERAL_RESERVE_1

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2013
Supplementary Mineral Reserve Information [Abstract]	'
Estimated Recoverable Proven and Probable Reserves by Location	'
		Recoverable Proven and Probable Mineral Reserves
		Estimated at December 31, 2013
		Coppera		Gold		Molybdenum
		(billion pounds)		(million ounces)		(billion pounds)
	North America	36.2		0.4		2.55
	South America	37		1.1		0.71
	Indonesia	30		29.8		—
	Africa	8		—		—
	Consolidatedb	111.2		31.3		3.26
	Net equity interestc	88.6		28.3		2.93
	a.	Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.
	b.	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.87 billion pounds of cobalt at Tenke and 308.5 million ounces of silver in Indonesia, South America and North America, which were determined using long-term average prices of $10 per pound for cobalt and $15 per ounce for silver.
	c.	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.48 billion pounds of cobalt at Tenke and 252.9 million ounces of silver in Indonesia, South America and North America.
Supplementary Reserve Information at 100% Basis by Location	'
			Recoverable Proven and Probable Mineral Reserves
			Estimated at December 31, 2013
					Average Ore Grade					Recoverable Proven and
					Per Metric Tona					Probable Reservesb
			Orea		Copper	Gold		Molybdenum		Copper	Gold		Molybdenum
			(million							(billion	(million		(billion
			metric tons)		(%)	(grams)		(%)		pounds)	ounces)		pounds)
	North America
	Developed and producing:
	Morenci		3,779		0.27	—		—	c	14.6	—		0.15
	Bagdad		1,449		0.31	—	c	0.02		7.9	0.1		0.39
	Safford		149		0.45	—		—		1.2	—		—
	Sierrita		2,534		0.23	—	c	0.03		11	0.1		1.08
	Miami		15		0.43	—		—		0.2	—		—
	Chino		376		0.42	0.02		—	c	2.6	0.2		0.01
	Tyrone		69		0.34	—		—		0.5	—		—
	Henderson		105		—	—		0.17		—	—		0.33
	Climax		189		—	—		0.16		—	—		0.61
	Undeveloped:
	Cobre		73		0.39	—		—		0.3	—		—
	South America
	Developed and producing:
	Cerro Verde		4,047		0.37	—		0.01		29.4	—		0.71
	El Abra		576		0.45	—		—		3.6	—		—
	Candelaria		281		0.58	0.14		—		3.9	1.1		—
	Ojos del Salado		8		1	0.23		—		0.1	—	c	—
	Indonesia
	Developed and producing:
	Grasberg open pit		206		0.95	1.08		—		3.6	5.8		—
	Deep Ore Zone		152		0.56	0.73		—		1.6	2.8		—
	Big Gossan		54		2.22	0.97		—		2.5	1.1		—
	Undeveloped:
	Grasberg Block Cave		1,000		1.02	0.78		—		18.9	16.1		—
	Kucing Liar		420		1.24	1.07		—		9.8	6.5		—
	Deep Mill Level Zone		526		0.83	0.7		—		8.3	9.3		—
	Africa
	Developed and producing:
	Tenke Fungurume		113		3.34	—		—		8	—		—
	Total 100% basis		16,121							128	43.1		3.28
	Consolidatedd									111.2	31.3		3.26
	FCX’s equity sharee									88.6	28.3		2.93
	a.	Excludes material contained in stockpiles.
	b.	Included estimated recoverable metals contained in stockpiles.
	c.	Amounts not shown because of rounding.
	d.	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
	e.	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

SUPPLEMENTARY_OIL_AND_GAS_INFO1

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2013
Supplementary Oil and Gas Information [Abstract]	'
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block]	'
	FCX's oil and gas acquisition, exploration and development activities since the acquisitions of PXP and MMR follow:
	Property acquisition costs:
	Proved propertiesa	$	12,205
	Unproved propertiesb	11,259
	Exploration costs	502
	Development costs	854
		$	24,820
	a.	Included $12.2 billion from the acquisitions of PXP and MMR.
	b.	Included $11.1 billion from the acquisitions of PXP and MMR.
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block]	'
	The following table presents the aggregate capitalized costs subject to amortization for oil and gas properties and the aggregate related accumulated amortization as of December 31, 2013:
	Properties subject to amortization		$	13,829
	Accumulated amortization		(1,357		)
			$	12,472
Schedule of Capitalized Costs of Unproved Properties Excluded from Amortization [Table Text Block]	'
	The following table summarizes the categories of costs comprising the amount of unproved properties not subject to amortization as of December 31, 2013:
	U.S.:
	Onshore
	Acquisition costs		$	3,109
	Exploration costs		8
	Capitalized interest		11
	Offshore
	Acquisition costs		7,528
	Exploration costs		163
	Capitalized interest		53
	International:
	Offshore
	Acquisition costs		15
	Exploration costs		—
	Capitalized interest		—
			$	10,887
Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]	'
	The results of operations from oil and gas producing activities from June 1, 2013, to December 31, 2013, presented below exclude non-oil and gas revenues, general and administrative expenses, interest expense and interest income. Income tax expense was determined by applying the statutory rates to pre-tax operating results:
	Revenues from oil and gas producing activities		$	2,616
	Production and delivery costs		(682		)
	Depreciation, depletion and amortization		(1,358		)
	Income tax expense (based on FCX's statutory tax rate)		(219		)
	Results of operations from oil and gas producing activities (excluding general and administrative expenses, interest expense and interest income)		$	357
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]	'
	The following table sets forth certain data pertaining to proved, proved developed and proved undeveloped reserves all of which are in the U.S. for the period June 1, 2013, to December 31, 2013.
			Oil			Gas		Total
			(MMbls)a,b			(Bcf)a		(MMBOE)a
	Proved reserves:
	Acquisitions of PXP and MMR		368			626		472
	Extensions and discoveries		20			20		24
	Revisions of previous estimates		11			(26	)	7
	Sale of reserves in-place		—			(3	)	(1	)
	Production		(29	)		(55	)	(38	)
	Balance at December 31, 2013		370			562		464
	Proved developed reserves at December 31, 2013		236			423		307
	Proved undeveloped reserves at December 31, 2013		134			139		157
	a.	MMbls =illion barrels; Bcf =illion cubic feet; MMBOE =illion BOE
	b.	Included 20 MMBbls of NGL proved reserves, consisting of 14 MMBbls of proved developed and 6 MMBbls of proved undeveloped at December 31, 2013.
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]	'
	The Standardized Measure related to proved oil and natural gas reserves as of December 31, 2013, follows:
	Future cash inflows		$	38,901
	Future production expense		(12,774		)
	Future development costsa		(6,480		)
	Future income tax expense		(4,935		)
	Future net cash flows		14,712
	Discounted at 10% per year		(5,295		)
	Standardized Measure		$	9,417
	a. Included estimated asset retirement costs of $1.8 billion.
Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]	'
	The following table summarizes the principal sources of changes in the Standardized Measure from June 1, 2013, to December 31, 2013:
	Reserves acquired in the acquisitions of PXP and MMR		$	14,467
	Sales, net of production expenses		(2,296		)
	Net changes in sales and transfer prices, net of production expenses		(459		)
	Extensions, discoveries and improved recoveries		752
	Changes in estimated future development costs		(1,190		)
	Previously estimated development costs incurred during the year		578
	Sales of reserves in-place		(12		)
	Other purchases of reserves in-place		—
	Revisions of quantity estimates		102
	Accretion of discount		701
	Net change in income taxes		(3,226		)
	Balance at December 31, 2013		$	9,417

SCHEDULE_II_VALUATION_AND_QUAL1

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Tables)	12 Months Ended
	Dec. 31, 2013
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS [Abstract]	'
Valuation and Qualifying Accounts [Table Text Block]	'
					Additions
			Balance at		Charged to		Charged to			Other				Balance at
			Beginning of		Costs and		Other			Additions				End of
			Year		Expense		Accounts			(Deductions)				Year
	Reserves and allowances deducted
	from asset accounts:
	Materials and supplies inventory allowances
	Year Ended December 31, 2013		$	27	$	22	$	—		$	(25	)	a	$	24
	Year Ended December 31, 2012		26		7		—			(6		)	a	27
	Year Ended December 31, 2011		26		4		—			(4		)	a	26
	Valuation allowance for deferred tax assets
	Year Ended December 31, 2013		$	2,443	$	42	$	—		$	—			$	2,485
	Year Ended December 31, 2012		2,393		49		1			—				2,443
	Year Ended December 31, 2011		2,226		146		21			—				2,393
	Reserves for non-income taxes:
	Year Ended December 31, 2013		$	80	$	35	$	(1	)	$	(36	)	b	$	78
	Year Ended December 31, 2012		73		21		(2		)	(12		)	b	80
	Year Ended December 31, 2011		73		12		(2		)	(10		)	b	73
	a.	Primarily represents write-offs of obsolete materials and supplies inventories.
	b.	Represents amounts paid or adjustments to reserves based on revised estimates.

SUMMARY_OF_SIGNIFICANT_ACCOUNT3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	31-May-13	Dec. 31, 2013
Schedule of Significant Accounting Policies [Line Items]	'	'
Minimum ownership percentage of subsidiary for inclusion in consolidated financial statements	'	50.00%
Percentage of ultimate copper recovery from leach stockpiles	'	90.00%
Threshhold for Determining Accounting Treatment for Oil and Gas Dispositions	'	25.00%
Fair Value Inputs, Discount Rate	'	10.00%
Amount of Natural Gas Sales Priced Using Industry Pricing Index, Percentage	'	50.00%
Minimum [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Ownership percentage for investment in unconsolidated companies accounted for using the equity method	'	20.00%
Maximum [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Ownership percentage for investments in unconsolidated companies carried at cost	'	20.00%
Percentage of copper ultimately recoverable from newly placed material on active stockpiles extracted during the first year	'	80.00%
PT Freeport Indonesia [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Ownership percentage of subsidiary	'	90.64%
Plains Exploration & Production Company [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Business Acquisition, Effective Date of Acquisition	31-May-13	31-May-13
Business Acquisition, Date Results Included in Combined Entity	'	1-Jun-13
McMoRan Exploration Co [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Business Acquisition, Effective Date of Acquisition	'	3-Jun-13
Business Acquisition, Date Results Included in Combined Entity	'	4-Jun-13
Oil and Gas Operations Segment [Member]	'	'
Schedule of Significant Accounting Policies [Line Items]	'	'
Interest Costs Capitalized	'	69

SUMMARY_OF_SIGNIFICANT_ACCOUNT4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property Plant and Equipment) (Details)	12 Months Ended
	Dec. 31, 2013
Minimum [Member] | Machinery and equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'3 years
Minimum [Member] | Mobile equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'3 years
Maximum [Member] | Building [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'39 years
Maximum [Member] | Machinery and equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'25 years
Maximum [Member] | Mobile equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'25 years

SUMMARY_OF_SIGNIFICANT_ACCOUNT5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Earnings Per Share) (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

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

Summary of Significant Accounting Policies [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Net income

$959

[1]

$1,048

$610

[1]

$824

$945

$1,140

[2]

$894

$1,001

$3,441

[1]

$3,980

[2]

$5,747

Net income attributable to noncontrolling interests

'

'

'

'

'

'

'

'

-761

-939

-1,187

Preferred dividends on redeemable noncontrolling interest

'

'

'

'

'

'

'

'

-22

0

0

Net income attributable to FCX common stockholders

$707

[1],[3],[4],[5],[6]

$821

[4],[5]

$482

[1],[3],[4],[5],[7]

$648

[3],[4]

$743

[8],[9]

$824

[2]

$710

$764

[10]

$2,658

[1],[3],[4],[5],[6],[7]

$3,041

[10],[2],[8],[9]

$4,560

Weighted-average shares of common stock outstanding (in shares)

'

'

'

'

'

'

'

'

1,002,000,000

949,000,000

947,000,000

Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (millions)

'

'

'

'

'

'

'

'

4,000,000

[11]

5,000,000

[11]

8,000,000

[11]

Weighted-average shares of common stock outstanding for purposes of calculating diluted net income per share (in shares)

'

'

'

'

'

'

'

'

1,006,000,000

954,000,000

955,000,000

Diluted net income per share attributable to FCX common stockholders (in dollars per share)

$0.68

[1],[3],[4],[5],[6]

$0.79

[4],[5]

$0.49

[1],[3],[4],[5],[7]

$0.68

[3],[4]

$0.78

[8],[9]

$0.86

[2]

$0.74

$0.80

[10]

$2.64

[1],[3],[4],[5],[6],[7]

$3.19

[10],[2],[8],[9]

$4.78

Potential anti-dilutive additional shares of common stock from stock options and restricted stock units

'

'

'

'

'

'

'

'

1,000,000

1,000,000

2,000,000

Outstanding stock options with exercise prices greater than average market price of common stock (in shares)

'

'

'

'

'

'

'

'

30,000,000

17,000,000

4,000,000

Weighted-average exercise price of stock options excluded (in dollars per share)

'

'

'

'

'

'

'

'

$40.23

$44.73

$53.91

[1]

Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.

[2]

Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.

[3]

Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.

[4]

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.

[5]

Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.

[6]

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.

[7]

Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.

[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.

[10]

Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

[11]

Excluded shares of common stock associated with outstanding stock options with exercise prices less than the average market price of FCX's common stock that were anti-dilutive based on the treasury stock method totaled approximately one million for the years ended December 31, 2013 and 2012, and two million for the year ended December 31, 2011.

ACQUISITIONS_Details

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

Dec. 31, 2013

31-May-13

Dec. 31, 2013

Jun. 30, 2013

31-May-13

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Jun. 03, 2013

Jun. 03, 2013

Jun. 03, 2013

Mar. 31, 2013

Dec. 31, 2013

Mar. 29, 2013

Dec. 31, 2013

Dec. 31, 2013

Feb. 14, 2013

Feb. 28, 2012

Mar. 31, 2013

Mar. 07, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 29, 2013

Mar. 29, 2013

8% Convertible Perpetual Preferred Stock [Member]

5.75% Convertible Perpetual Preferred Stock, Series 1 [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Kokkola Cobalt Chemicals Refinery [Member]

Kokkola Cobalt Chemicals Refinery [Member]

Kokkola Cobalt Chemicals Refinery [Member]

Intersubsegment Eliminations [Member]

Bank Term Loan [Member]

Bank Term Loan [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Oil and Gas Operations Segment [Member]

Oil and Gas Operations Segment [Member]

Oil and Gas Operations Segment [Member]

Lundin Mining Corporation [Member]

La Generale des Carrieres et des Mines [Member]

Common Stock [Member]

5.75% Convertible Perpetual Preferred Stock, Series 2 [Member]

Kokkola Cobalt Chemicals Refinery [Member]

Kokkola Cobalt Chemicals Refinery [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends Payable, Date to be Paid

'

'

'

3-Feb-14

'

'

'

'

'

'

'

'

'

31-May-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Effective Date of Acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

31-May-13

31-May-13

'

'

'

'

3-Jun-13

'

'

'

'

29-Mar-13

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

$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

[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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5-Dec-12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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.

ACQUISITIONS_Purchase_Price_Al

ACQUISITIONS (Purchase Price Allocation) (Details) (USD $)

7 Months Ended

12 Months Ended

7 Months Ended

7 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

31-May-13

Dec. 31, 2013

Jun. 03, 2013

31-May-13

Dec. 31, 2013

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Intersubsegment Eliminations [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

Investment Owned, Balance, Shares

'

'

'

'

'

'

'

'

51

'

Current assets

$1,291

$1,291

'

'

$1,193

'

$98

'

'

$0

Subject to amortization

12,203

12,203

'

'

11,447

'

756

'

'

0

Not subject to amortization

11,087

11,087

'

'

9,401

'

1,686

'

'

0

Property, plant, and equipment

262

262

'

'

261

'

1

'

'

0

Investment in MMR

0

[1]

0

[1]

'

'

848

[1]

'

0

[1]

'

848

-848

[1]

Other assets

435

435

'

'

12

'

423

'

'

0

Current liabilities

-1,080

-1,080

'

'

-906

'

-174

'

'

0

Debt (current and long-term)

-11,251

-11,251

'

'

-10,631

'

-620

'

'

0

Deferred income taxes

-3,916

[2]

-3,916

[2]

'

'

-3,916

[2]

'

0

[2]

'

'

0

[2]

Other long-term liabilities

-1,061

-1,061

'

'

-799

'

-262

'

'

0

Redeemable noncontrolling interest

-967

-967

'

'

-708

'

-259

'

'

0

Total fair value, excluding goodwill

7,003

7,003

'

'

6,202

'

1,649

'

'

-848

Goodwill

1,916

[3]

1,916

[3]

0

'

437

[3]

'

1,479

[3]

'

'

0

[3]

Total purchase price

8,919

8,919

'

'

6,639

6,639

3,128

3,128

'

-848

Business Combinations, Tax Rate, Fair Value Adjustments, Percent

38.00%

'

'

'

'

'

'

'

'

'

Federal Statutory Income Tax Rate, Percent

35.00%

35.00%

35.00%

35.00%

'

'

'

'

'

'

State and Local Income Taxes, Percent

3.00%

0.00%

0.00%

0.00%

'

'

'

'

'

'

Increase in current assets (primarily current deferred income tax asset)

185

'

'

'

183

'

2

'

'

'

Subject to amortization

-45

'

'

'

0

'

-45

'

'

'

Not subject to amortization

-240

'

'

'

-234

'

-6

'

'

'

Increase in other assets (deferred income tax asset)

24

'

'

'

0

'

24

'

'

'

Net increase in deferred income tax liability

-45

'

'

'

-45

'

0

'

'

'

Net decrease (increase) in other liabilities (primarily warrants)

73

'

'

'

77

'

-4

'

'

'

Decrease n redeemable noncontrolling interest

41

'

'

'

41

'

0

'

'

'

(Decrease) increase in goodwill

$12

'

'

'

($17)

'

$29

'

'

'

[1]

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

[2]

Deferred income taxes have been recognized based on the estimated fair value adjustments to net assets using a 38 percent tax rate, which reflected the 35 percent federal statutory rate and a 3 percent weighted-average of the applicable statutory state tax rates (net of federal benefit).

[3]

During the fourth quarter of 2013, FCX conducted a qualitative goodwill impairment assessment by examining relevant events and circumstances that could have a negative impact on FCX's goodwill, such as macroeconomic conditions, industry and market conditions, cost factors that have a negative effect on earnings and cash flows, overall financial performance, dispositions and acquisitions, and any other relevant events or circumstances. After assessing the relevant events and circumstances for the qualitative impairment assessment, FCX determined that performing a quantitative goodwill impairment test was unnecessary, and no goodwill impairment was recognized.

ACQUISITIONS_Redeemable_Noncon

ACQUISITIONS (Redeemable Noncontrolling Interest) (Details) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 03, 2013	Dec. 31, 2013	Dec. 31, 2011	31-May-13	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2011
					Plains Offshore Operations Inc. [Member]	Plains Offshore Operations Inc. [Member]	Plains Offshore Operations Inc. [Member]	8% Convertible Perpetual Preferred Stock [Member]	5.75% Convertible Perpetual Preferred Stock, Series 1 [Member]	5.75% Convertible Perpetual Preferred Stock, Series 1 [Member]	Minimum [Member]
											Plains Offshore Operations Inc. [Member]
											ft
Redeemable Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Preferred Stock Of Subsidiary	'	'	'	'	'	450,000	'	'	'	'	'
Preferred Stock, Dividend Rate, Percentage	'	'	'	'	'	'	'	8.00%	'	5.75%	'
Proceeds from Issuance of Convertible Preferred Stock	'	'	'	'	'	$450,000,000	'	'	'	'	'
Class of Warrants or Rights, Exercise Price of Warrants or Rights	'	'	'	'	'	$20	'	'	'	'	'
Nondetachable Warrants	'	'	'	'	'	9,100,000	'	'	'	'	'
Common Stock Held In Escrow	'	'	'	'	'	87,000,000	'	'	'	'	'
Depth of Oil and Gas Properties	'	'	'	'	'	'	'	'	'	'	500
Equity Interest Held By Outside Party, Percent	'	'	'	'	'	20.00%	'	'	'	'	'
Preferred Stock Quarterly Cash Dividend Annual Rate Percentage	'	'	'	'	8.00%	'	'	'	'	'	'
Preferred Stock Dividend Rate Percentage Deferred	'	'	'	'	2.00%	'	'	'	'	'	'
Dividends Payable	'	'	'	'	23,000,000	'	'	'	'	'	'
Participating Dividends Future Multiple	'	'	'	'	4	'	'	'	'	'	'
Percentage Of Common Shares Diluted Basis Related To Failed Exit Event Consideration	'	'	'	'	'	49.00%	'	'	'	'	'
Failed Exit Event Parents Purchase Amount Of Junior Preferred Stock	'	'	'	'	'	300,000,000	'	'	'	'	'
Liquidation Preference Multiple	'	'	'	'	'	1.25	'	'	'	'	'
Redeemable noncontrolling interest	716,000,000	0	'	259,000,000	716,000,000	'	708,000,000	'	'	'	'
Preferred Stock Conversion, Converted Instrument, Expiration or Due Date	'	'	'	'	'	'	'	'	9-Jul-13	'	'
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	'	'	'	'	'	'	'	'	'	'
Royalty Trust Units, Fair Value Disclosure	'	'	'	$31,000,000	'	'	'	'	'	'	'

ACQUISITIONS_Pro_Forma_Details

ACQUISITIONS (Pro Forma) (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]	'	'	'	'	'
Revenues	'	'	$23,075,000,000	$22,713,000,000	'
Operating income	'	'	6,267,000,000	6,815,000,000	'
Income from continuing operations	'	'	3,626,000,000	4,277,000,000	'
Net income attributable to FCX common stockholders	'	'	2,825,000,000	3,301,000,000	'
Net income per share attributable to FCX common stockholders, basic	'	'	$2.71	$3.17	'
Net income per share attributable to FCX common stockholders, diluted	'	'	$2.70	$3.16	'
Business Combination, Acquisition Related Costs, Including Acquiree Costs	'	'	519,000,000	'	'
Income Tax Expense (Benefit), Changes in Deferred Tax Liabilities and Deferred Tax Asset Valuation Allowances	16,000,000	183,000,000	199,000,000	'	'
Gain on investment in McMoRan Exploration Co. (MMR)	'	'	128,000,000	0	0
Gain (Loss) on Disposition of Oil and Gas Property	'	'	$77,000,000	'	'

OWNERSHIP_IN_SUBSIDIARIES_AND_1

OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES (Details) (USD $)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2013	Dec. 31, 2012
Summary of investment holdings [Line Items]	'	'	'
Retained earnings (accumulated deficit) of subsidiary	'	$2,742,000,000	$2,399,000,000
Morenci [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Percentage of undivided interest owned by company	'	85.00%	'
Other North America Mines [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	100.00%	'
Cerro Verde [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	53.56%	'
El Abra [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	51.00%	'
Candelaria [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	80.00%	'
Ojos Del Salado [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	80.00%	'
Tenke [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	56.00%	'
Freeport-McMoRan Corporation [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Net assets (liabilities) in subsidiary	'	20,300,000,000	'
Retained earnings (accumulated deficit) of subsidiary	'	-9,000,000,000	'
FCX loans outstanding	'	0	'
Number of pounds of copper purchased from Sumitomo	'	76,000,000	'
Dollar value of pounds purchased from Sumitomo	'	253,000,000	'
Net receivable from Sumitomo	'	12,000,000	49,000,000
PT Freeport Indonesia [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	81.28%	'
Net assets (liabilities) in subsidiary	'	4,900,000,000	'
Retained earnings (accumulated deficit) of subsidiary	'	4,700,000,000	'
FCX loans outstanding	'	0	'
Percentage of cash flows from specified annual amounts of copper, gold and silver calculated by reference to proven and probable reserves as of 12/31/1994 (in hundredths)	'	100.00%	'
Percentage of remaining cash flows	'	60.00%	'
Reduction in Specified Copper Production Resulting from Labor and Pipeline Disruptions (in pounds)	'	228,000,000	'
Reduction in Specified Gold Production Resulting from Labor and Pipeline Disruptions (in ounces)	'	224,000	'
PT Indocopper Investama [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	100.00%	'
Company's indirect ownership percentage of a subsidiary through another wholly owned subsidiary	'	9.36%	'
Atlantic Copper [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	100.00%	'
Net assets (liabilities) in subsidiary	'	-148,000,000	'
Retained earnings (accumulated deficit) of subsidiary	'	-543,000,000	'
FCX loans outstanding	'	642,000,000	'
Freeport-McMoRan Oil & Gas [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Company's direct ownership percentage	'	100.00%	'
Net assets (liabilities) in subsidiary	'	-9,800,000,000	'
Retained earnings (accumulated deficit) of subsidiary	'	-265,000,000	'
FCX loans outstanding	'	3,400,000,000	'
Rio Tinto Share In Joint Venture [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Percentage interest in joint venture contract of work by third party	'	40.00%	'
Percentage of optional participation of any other future exploration costs shared by joint venture	'	40.00%	'
Percent interest in certain assets and future production per terms of the joint venture agreement	40.00%	40.00%	'
Payable to joint venture interests for its share of cash flows	'	$33,000,000	$4,000,000
Sumitomo's Share in Joint Venture [Member]	'	'	'
Summary of investment holdings [Line Items]	'	'	'
Percentage of undivided interest owned by third party	'	15.00%	'

INVENTORIES_INCLUDING_LONGTERM2

INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Components of Inventories) (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2013		Dec. 31, 2012
Components of Inventories [Line Items]	'		'		'
Raw materials	$238		$238		$237
Work-in-process	199	[1]	199	[1]	252	[1]
Finished goods	1,146	[2]	1,146	[2]	911	[2]
Total product inventories	1,583		1,583		1,400
Total current mill and leach stockpiles	1,705		1,705		1,672
Total material and supplies, net	1,730	[3]	1,730	[3]	1,504	[3]
Long-term mill and leach stockpiles	2,386		2,386		1,955
Inventory Write-down	76		76		'
Inventory obsolescence reserves	24		24		27
Current [Member]	'		'		'
Components of Inventories [Line Items]	'		'		'
Mill Stockpiles	91		91		104
Leach stockpiles	1,614	[4]	1,614	[4]	1,568
Total current mill and leach stockpiles	1,705		1,705		1,672
Long-Term [Member]	'		'		'
Components of Inventories [Line Items]	'		'		'
Mill Stockpiles	698		698		615
Leach stockpiles	1,688		1,688		1,340
Long-term mill and leach stockpiles	$2,386	[5]	$2,386	[5]	$1,955	[5]
[1]	FCX's mining operations also have work-in-process inventories that are included in mill and leach stockpiles.
[2]	Primarily included molybdenum concentrates; copper concentrates, anodes, cathodes and rod; and various cobalt products.
[3]	Materials and supplies inventory was net of obsolescence reserves totaling $24 million at December 31, 2013, and $27 million at December 31, 2012.
[4]	Amount is net of a $76 million charge associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles.
[5]	Estimated metals in stockpiles not expected to be recovered within the next 12 months.

PROPERTY_PLANT_EQUIPMENT_AND_M2

PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2007
Property, Plant and Equipment [Line Items]	'	'	'	'
VBPP recorded in connection with the Phelps Dodge acquisition	'	'	'	$2,200,000,000
VBPP transferred to proven and probable reserves	22,000,000	0	762,000,000	'
Cumulative impairments of VBPP	482,000,000	'	'	'
Mining Operations [Member]	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'
Capitalized interest total	$105,000,000	$81,000,000	$109,000,000	'

PROPERTY_PLANT_EQUIPMENT_AND_M3

PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Schedule of PPE) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	$34,249	$29,650
Accumulated depreciation, depletion and amortization	-10,207	-8,651
Property, plant, equipment and mining development costs, net	24,042	20,999
Proven and probable reserves [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	4,651	4,630
Value beyond proven and probable reserves (VBPP) [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	1,044	1,067
Mining development and other [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	4,335	3,821
Buildings and infrastructure [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	4,334	3,811
Machinery and equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	10,379	9,472
Mobile equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	3,903	3,447
Construction in progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant, equipment and mining development costs	$5,603	$3,402

OTHER_ASSETS_Details

OTHER ASSETS (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2010
Schedule Of Other Assets [Line Items]	'		'		'
Legally restricted funds	$392	[1]	$163	[1]	'
Intangible assets	380	[2]	334	[2]	'
Disputed tax assessments	327	[3]	177	[3]	'
Investments: [Abstract]	'		'		'
Available-for-sale securities	44		46		'
Other	63		51		'
Long-term receivable for income tax refunds	77		317		'
Loan to a DRC public electric utility	152		149		'
Debt issue costs	107		26		'
Loan to Gécamines (related party)	34		32		'
Deferred tax assets	2		220		'
Other	149		139		'
Total other assets	1,798		2,189		'
Finite-Lived Intangible Assets, Accumulated Amortization	57		71		'
Legally restricted funds for asset retirement obligations at New Mexico mines	158		161		'
McMoRan Exploration Co [Member]	'		'		'
Investments: [Abstract]	'		'		'
Cost-method investment	0	[4]	446	[4]	'
Number of shares of 5.75% Convertible Perpetual Preferred Stock purchased	'		'		500,000
Preferred Stock, Dividend Rate, Percentage	5.75%		'		'
Aggregate purchase price for preferred stock	'		'		500
PT Smelting [Member]	'		'		'
Investments: [Abstract]	'		'		'
Equity method investment	71	[5]	89	[5]	'
PT Smelting [Member]	'		'		'
Investments: [Abstract]	'		'		'
Company's direct ownership percentage	25.00%		'		'
Unrecognized profit on sales from PT Freeport Indonesia to PT Smelting	58		39		'
Indonesia [Member]	'		'		'
Schedule Of Other Assets [Line Items]	'		'		'
Disputed tax assessments	255		148		'
Bank Time Deposits [Member]	'		'		'
Schedule Of Other Assets [Line Items]	'		'		'
Legally restricted funds	$210		'		'
[1]	Included $210 million (time deposit that secures a bank guarantee) associated with the Cerro Verde royalty dispute and $158 million for AROs related to properties in New Mexico at December 31, 2013, and $161 million for AROs related to properties in New Mexico at December 31, 2012 (refer to Note 12 for further discussion).
[2]	Intangible assets were net of accumulated amortization totaling $57 million at December 31, 2013, and $71 million at December 31, 2012.
[3]	Included Indonesian disputed tax assessments of $255 million at December 31, 2013, and $148 million at December 31, 2012 (refer to Note 12 for further discussion).
[4]	In December 2010, FCX purchased 500,000 shares of MMR’s 5.75% Convertible Perpetual Preferred Stock for an aggregate purchase price of $500 million, which was recorded at cost and subsequently reduced by dividends. On June 3, 2013, FCX acquired MMR (refer to Note 2 for discussion of the acquisition of MMR).
[5]	FCX's 25 percent ownership in PT Smelting (smelter and refinery in Gresik, Indonesia) is recorded using the equity method. Amounts were reduced by unrecognized profits on sales from PT-FI to PT Smelting totaling $58 million at December 31, 2013, and $39 million at December 31, 2012.

ACCOUNTS_PAYABLE_AND_ACCRUED_L2

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accounts Payable and Accrued Liabilities [Line Items]	'		'		'
Commodity derivative contracts	$320		$20		'
Total accounts payable and accrued liabilities	3,700		2,324		'
Cash interest paid, net	397		111		225
Accounts Payable and Accrued Liabilities [Member]	'		'		'
Accounts Payable and Accrued Liabilities [Line Items]	'		'		'
Accounts payable	2,144		1,568		'
Salaries, wages and other compensation	352		287		'
Commodity derivative contracts	205		11		'
Accrued interest	210	[1]	35	[1]	'
Oil and gas royalty and revenue payable	169		0		'
Pension, postretirement, postemployment and other employee benefits	161	[2]	140	[2]	'
Other accrued taxes	142		92		'
Deferred revenue	115		94		'
Payable to joint venture interests for its share of cash flows	33		4		'
Other	$169		$93		'
[1]	Third-party interest paid, net of capitalized interest, was $397 million in 2013, $111 million in 2012 and $225 million in 2011.
[2]	Refer to Note 9 for long-term portion.

DEBT_Details

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

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Feb. 14, 2013

Dec. 31, 2012

Feb. 28, 2012

Mar. 31, 2013

Mar. 07, 2013

Mar. 31, 2007

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2021

Dec. 31, 2013

Dec. 31, 2012

Feb. 28, 2012

Dec. 31, 2022

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2042

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Jun. 03, 2013

Dec. 31, 2013

Dec. 31, 2012

Feb. 28, 2012

Dec. 31, 2013

Dec. 31, 2012

Feb. 28, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Jun. 03, 2013

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

31-May-13

Dec. 31, 2013

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Bridge Loan [Member]

Revolving Credit Facility [Member]

Line of Credit [Member]

Bank Term Loan [Member]

Bank Term Loan [Member]

Bank Term Loan [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Assumed Debt [Member]

Other debt (including equipment capital leases and short-term borrowings) [Member]

Other debt (including equipment capital leases and short-term borrowings) [Member]

Line of Credit [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

3.55% Senior Notes Due 2022 [Member]

3.55% Senior Notes Due 2022 [Member]

3.55% Senior Notes Due 2022 [Member]

3.55% Senior Notes Due 2022 [Member]

3.875% Senior Notes due March 2023 [Member]

3.875% Senior Notes due March 2023 [Member]

3.875% Senior Notes due March 2023 [Member]

5.450% Senior Notes due March 2043 [Member]

5.450% Senior Notes due March 2043 [Member]

5.450% Senior Notes due March 2043 [Member]

4% Convertible Senior Notes due 2017 [Member]

4% Convertible Senior Notes due 2017 [Member]

1.40% Senior Notes Due 2015 [Member]

1.40% Senior Notes Due 2015 [Member]

1.40% Senior Notes Due 2015 [Member]

2.15% Senior Notes Due 2017 [Member]

2.15% Senior Notes Due 2017 [Member]

2.15% Senior Notes Due 2017 [Member]

2.375% Senior Notes due March 2018 [Member]

2.375% Senior Notes due March 2018 [Member]

3.100% Senior Notes due March 2020 [Member]

3.100% Senior Notes due March 2020 [Member]

8.375% Senior Notes Due 2017 [Member]

9.5% Senior Notes due 2031 [Member]

9.5% Senior Notes due 2031 [Member]

9.5% Senior Notes due 2031 [Member]

6.125% Senior Notes due 2034 [Member]

7.125% Debentures due 2027 [Member]

8.25% Senior Notes due 2015 [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Freeport McMoRan Corporation [Member]

Freeport McMoRan Corporation [Member]

Freeport McMoRan Corporation [Member]

Freeport McMoRan Corporation [Member]

Freeport McMoRan Corporation [Member]

Freeport McMoRan Corporation [Member]

Option 1 [Member]

Option 1 [Member]

Option 2 [Member]

Option 2 [Member]

Credit Facility [Domain]

Credit Facility [Domain]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Assumed Debt [Member]

Senior Notes [Member]

Debentures [Member]

Senior Notes [Member]

11.875% Senior Notes due 2014 [Member]

11.875% Senior Notes due 2014 [Member]

4% Convertible Senior Notes due 2017 [Member]

5.25% Convertible Senior Notes due 2013 [Member]

Credit Facility [Domain]

Senior Notes [Member]

Senior Notes [Member]

7.625% Senior Notes due 2018 [Member]

7.625% Senior Notes due 2018 [Member]

6.125% Senior Notes due 2019 [Member]

6.125% Senior Notes due 2019 [Member]

8.625% Senior Notes due 2019 [Member]

8.625% Senior Notes due 2019 [Member]

7.625% Senior Notes due 2020 [Member]

7.625% Senior Notes due 2020 [Member]

6.5% Senior Notes due 2020 [Member]

6.5% Senior Notes due 2020 [Member]

6.625% Senior Notes due 2021 [Member]

6.625% Senior Notes due 2021 [Member]

6.75% Senior Notes due 2022 [Member]

6.75% Senior Notes due 2022 [Member]

6.875% Senior Notes due 2023 [Member]

6.875% Senior Notes due 2023 [Member]

9.5% Senior Notes due 2031 [Member]

9.5% Senior Notes due 2031 [Member]

6.125% Senior Notes due 2034 [Member]

6.125% Senior Notes due 2034 [Member]

7.125% Debentures due 2027 [Member]

7.125% Debentures due 2027 [Member]

Bank Term Loan [Member]

Revolving Credit Facility [Member]

Bank Term Loan [Member]

Revolving Credit Facility [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Debentures [Member]

Debentures [Member]

Credit Facility [Domain]

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

31-May-18

30-Mar-16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Effective Date of Acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

31-May-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

31-May-18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Effective Percentage

'

'

'

'

'

'

'

'

1.67%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.55%

'

3.88%

'

'

5.45%

'

'

'

'

'

1.40%

'

'

2.15%

2.38%

'

3.10%

'

8.38%

'

9.50%

'

6.13%

7.13%

8.25%

'

'

'

11.88%

4.00%

5.25%

'

'

'

'

'

7.63%

6.13%

'

8.63%

'

7.63%

'

6.50%

'

6.63%

'

6.75%

'

6.88%

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Long-term Debt

'

'

'

'

'

'

'

'

'

'

'

2,970,000,000

6,400,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Redemption Period, Start Date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1-Dec-21

'

'

'

15-Dec-22

'

'

15-Sep-42

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption to Principal Amount, Percent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

100.00%

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

104.55%

'

'

'

'

'

104.13%

'

'

'

'

'

'

'

'

'

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Conversion, Converted Instrument, Expiration or Due Date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15-Jun-16

'

15-Oct-14

'

1-Apr-15

'

15-Nov-15

'

1-May-16

'

1-Feb-17

'

15-Feb-18

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

OTHER_LIABILITIES_INCLUDING_EM2

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Employee Benefits [Line Items]	'		'		'
Defined Benefit Plan, Vesting Period	'5 years		'		'
Pension, postretirement, postemployment and other employment benefits	$1,225	[1]	$1,340	[1]	'
Commodity derivative contracts	320		20		'
Reserve for uncertain tax benefits	87		107		'
Other	263		197		'
Total other liabilities	1,690		1,644		'
Number of years Mercer Pension Discount Curve consists of spot interest rates at half-year increments	'30 years		'		'
Years of service required for annuity to equal percentage of executive's highest average compensation for any consecutive three-year period during the preceeding five years before retirement	'25 years		'		'
Estimated future average expected rate of return per annum on pension assets	7.50%		'		'
Estimated future average expected rate of return on passively managed pension assets	7.00%		'		'
Estimated future average expected premium on actively managed pension assets	0.50%		'		'
Accumulated benefit obligations in excess of plan assets [Abstract]	'		'		'
Projected benefit obligation	2,180		2,247		'
Accumulated benefit obligation	1,933		2,031		'
Fair value of plan assets	1,490		1,443		'
Balance of unfunded defined contribution plan	65		59		'
Costs charged to operations for employee savings plans and defined contribution plans	66		43		35
Costs capitalized to oil and gas properties for employee savings plans and defined benefit contribution plans	5		'		'
Other Liabilities [Member]	'		'		'
Employee Benefits [Line Items]	'		'		'
Commodity derivative contracts	$115		$0		'
[1]	Refer to Note 7 for current portion.

OTHER_LIABILITIES_INCLUDING_EM3

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Target Asset Allocation) (Details)	12 Months Ended
	Dec. 31, 2013
Alternative Investments [Member]	'
Target asset allocation [Line Items]	'
Defined benefit plan, target allocation percentage of assets	10.00%
Equity Investments [Member]	'
Target asset allocation [Line Items]	'
Defined benefit plan, target allocation percentage of assets	57.00%
Fixed Income Investments [Member]	'
Target asset allocation [Line Items]	'
Defined benefit plan, target allocation percentage of assets	33.00%

OTHER_LIABILITIES_INCLUDING_EM4

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Schedule of Disclosures) (Details)

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

USD ($)

USD ($)

USD ($)

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Pension plan [Member]

Other Benefits [Member]

Other Benefits [Member]

Minimum [Member]

USD ($)

USD ($)

FCX [Member]

FCX [Member]

FCX [Member]

FCX [Member]

FCX [Member]

FCX [Member]

FCX [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

Postretirement Medical Insurance [Member]

Postretirement Medical And Life Insurance [Member]

Postretirement Medical And Life Insurance [Member]

Postretirement Medical And Life Insurance [Member]

USD ($)

USD ($)

Pension plan [Member]

USD ($)

USD ($)

USD ($)

USD ($)

FMC Plans [Member]

FMC Plans [Member]

FMC Plans [Member]

USD ($)

USD ($)

USD ($)

USD ($)

IDR

IDR

USD ($)

USD ($)

USD ($)

Schedule of disclosures of defined benefit plans [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exchange Rate Of Rupiah To Dollars

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12,128

9,622

'

'

'

'

'

'

'

Defined benefit plan, expected return on plan assets

7.50%

'

'

'

'

'

'

'

'

'

'

'

'

7.75%

'

'

'

'

'

'

'

'

'

'

'

Change in benefit obligation [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Benefit obligation at beginning of year

'

'

'

'

'

$1,871

$1,954

$1,791

'

'

'

'

$259

$240

$206

'

'

'

'

$213

$223

'

'

'

'

Service cost

'

'

'

'

'

'

30

27

24

'

'

'

'

20

17

13

'

'

'

1

1

'

'

'

'

Interest cost

'

'

'

'

'

'

77

79

83

'

'

'

'

14

14

11

'

'

'

7

9

'

'

'

'

Actuarial losses (gains)

'

'

'

'

'

'

-103

142

'

'

'

'

'

13

25

'

'

'

'

-24

2

'

'

'

'

Plan Amendment

'

'

'

'

'

'

0

0

'

'

'

'

'

33

0

'

'

'

'

6

0

'

'

'

'

Foreign exchange losses (gains)

'

'

'

'

'

'

1

1

'

'

'

'

'

-53

-13

'

'

'

'

'

'

'

'

'

'

Benefits paid

'

'

'

'

'

'

-88

-86

'

'

'

'

'

-8

-9

'

'

'

'

-34

-35

'

'

'

'

Benefits paid, net of employee and joint venture partner contributions, and Medicare Part D subsidy

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-21

-22

'

'

'

'

Benefits obligation at end of year

'

'

'

'

'

'

1,871

1,954

1,791

'

'

'

'

259

240

206

'

'

'

182

213

223

'

'

'

Change in plan assets [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of plan assets at beginning of year

'

'

'

'

'

1,350

1,300

1,141

'

'

'

'

124

130

107

'

'

'

'

0

0

'

'

'

'

Actual return on plan assets

'

'

'

'

'

'

112

140

'

'

'

'

'

-3

12

'

'

'

'

'

'

'

'

'

'

Employer contributions

'

'

'

'

'

'

26

[1]

105

[1]

'

'

'

'

'

35

[1]

26

[1]

'

'

'

'

23

25

'

'

'

'

Employee contributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11

10

'

'

'

'

Foreign exchange gains (losses)

'

'

'

'

'

'

0

0

'

'

'

'

'

-30

-6

'

'

'

'

'

'

'

'

'

'

Benefits paid

'

'

'

'

'

'

-88

-86

'

'

'

'

'

-8

-9

'

'

'

'

-34

-35

'

'

'

'

Fair value of plan assets at end of year

'

'

'

'

'

'

1,350

1,300

1,141

'

'

'

'

124

130

107

'

'

'

0

0

0

'

'

'

Funded status at end of year

'

'

'

'

'

'

-521

-654

'

'

'

'

'

-135

-110

'

'

'

'

-182

-213

'

'

'

'

Accumulated benefit obligation

'

'

'

'

'

'

1,742

1,842

'

'

'

'

'

141

136

'

'

'

'

'

'

'

'

'

'

Weighted-average assumptions used to determine benefit obligations [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Discount rate

'

'

'

'

'

'

5.00%

4.10%

'

'

'

'

'

9.00%

6.25%

'

'

'

'

4.30%

3.50%

'

'

'

'

Rate of compensation increase

'

'

'

'

'

'

3.75%

[2]

3.75%

[2]

'

'

'

'

'

10.00%

[2]

8.00%

[2]

'

'

'

'

'

'

'

'

'

'

Balance sheet classification of funded status: [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other assets

'

'

'

'

'

'

8

7

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

Accounts payable and accrued liabilities

'

'

'

'

'

'

-4

-4

'

'

'

'

'

0

0

'

'

'

'

-19

-21

'

9

8

'

Other liabilities

'

'

'

'

'

'

-525

-657

'

'

'

'

'

-135

-110

'

'

'

'

-163

-192

'

75

69

'

Total

'

'

'

'

'

'

-521

-654

'

'

'

'

'

-135

-110

'

'

'

'

-182

-213

'

'

'

'

Estimated future employer contributions in next fiscal year

'

'

'

'

'

5

'

'

'

'

'

'

22

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average assumptions used to determine benefit obligations [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Discount rate

'

'

'

'

'

'

'

'

'

4.10%

[3]

4.60%

[3]

5.40%

[3]

'

6.25%

7.00%

8.50%

'

'

'

3.50%

4.20%

4.90%

'

'

'

Expected return on plan assets

'

'

'

'

'

'

'

'

'

7.50%

[3]

7.50%

[3]

8.00%

[3]

'

7.50%

9.25%

9.25%

'

'

'

'

'

'

'

'

'

Rate of compensation increase

'

'

'

'

'

'

'

'

'

3.75%

[3]

3.75%

[3]

3.75%

[3]

'

8.00%

8.00%

8.00%

'

'

'

'

'

'

'

'

'

Threshold for Amortization of Actuarial Gains (Losses), Percent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Service cost

'

'

'

'

'

'

30

27

24

'

'

'

'

20

17

13

'

'

'

1

1

'

'

'

'

Interest cost

'

'

'

'

'

'

77

79

83

'

'

'

'

14

14

11

'

'

'

7

9

'

'

'

'

Expected return on plan assets

'

'

'

'

'

'

-95

-86

-86

'

'

'

'

-10

-9

-9

'

'

'

'

'

'

'

'

'

Amortization of prior service cost

'

'

'

'

'

'

0

-1

-1

'

'

'

'

0

1

1

'

'

'

'

'

'

'

'

'

Amortization of net actuarial losses

'

'

'

'

'

'

38

33

19

'

'

'

'

8

7

3

'

'

'

'

'

'

'

'

'

Net periodic benefit cost

'

'

'

'

'

'

50

52

39

'

'

'

'

32

30

19

'

'

'

'

'

'

'

'

'

Amounts recognized in other comprehensive loss (income) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prior service (credit) cost

33

'

'

32

-2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prior service (credit) cost, net of tax

21

0

0

17

-1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Actuarial net loss (gain)

'

'

'

542

705

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Actuarial net loss (gain), net of tax

-85

66

137

326

429

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax

'

'

'

574

703

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax

'

'

'

343

428

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated actuarial net loss (gain) in next fiscal year

'

'

'

25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated actuarial net loss (gain) in next fiscal year, net of tax

'

'

'

15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assumed health care cost trend rates abstract

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Health care cost trend rates for the next fiscal year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.75%

'

'

'

'

'

'

Duration over which health care costs reach ultimate trend rate

'15 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ultimate health care cost trend rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.25%

'

'

'

'

'

'

Expected cash flows for benefit plans [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2014

'

'

'

'

'

'

93

'

'

'

'

'

'

21

[4]

'

'

'

'

'

19

'

'

'

'

'

2015

'

'

'

'

'

'

147

'

'

'

'

'

'

12

[4]

'

'

'

'

'

18

'

'

'

'

'

2016

'

'

'

'

'

'

99

'

'

'

'

'

'

13

[4]

'

'

'

'

'

17

'

'

'

'

'

2017

'

'

'

'

'

'

102

'

'

'

'

'

'

18

[4]

'

'

'

'

'

16

'

'

'

'

'

2018

'

'

'

'

'

'

106

'

'

'

'

'

'

21

[4]

'

'

'

'

'

15

'

'

'

'

'

2019-2023

'

'

'

'

'

'

584

'

'

'

'

'

'

194

[4]

'

'

'

'

'

70

'

'

'

'

'

Estimated Other Comprehensive Income, Defined Benefit Plans, Prior Service Cost Arising During Period, Before Tax

'

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated Other Comprehensive Income, Defined Benefit Plans, Prior Service Cost Arising During Period, Net of Tax

'

'

'

$2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Employer contributions for 2014 are expected to approximate $5 million for the FCX plans and $22 million for the PT-FI plan (based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar).

[2]

The rate of compensation increase shown for the PT-FI plan in 2013 related to non-staff employees (staff employees was 8 percent).

[3]

The assumptions shown relate only to the FMC plans.

[4]

Based on a December 31, 2013, exchange rate of 12,128 Indonesian rupiah to one U.S. dollar.

OTHER_LIABILITIES_INCLUDING_EM5

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Schedule of FV of Financial Assets for Pension Plans) (Details) (Pension plan [Member], USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
In Millions, unless otherwise specified
FCX [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	$1,350		$1,300		$1,141
Cash and Receivables In Plan Assets	18		5		'
Payables In Plan Assets	-14		-12		'
PT Freeport Indonesia [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	124		130		107
Cash and Receivables In Plan Assets	62	[1]	61	[1]	'
Investments [Member] | FCX [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	1,346		1,307		'
Investments [Member] | FCX [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	215		232		'
Investments [Member] | FCX [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	1,041		989		'
Investments [Member] | FCX [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	90		86		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Global equity [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	623		481		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Global equity [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Global equity [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	623		481		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Global equity [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. real estate securities [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	40		61		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. real estate securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. real estate securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	40		61		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. real estate securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. small-cap equity [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	65		52		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. small-cap equity [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. small-cap equity [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	65		52		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | U.S. small-cap equity [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Real estate property [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	47		41		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Real estate property [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Real estate property [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Real estate property [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	47		41		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Short-term Investments [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	5		40		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	5		40		'
Investments [Member] | FCX [Member] | Commingled/collective funds [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Government bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	43		48		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Government bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	43		48		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Government bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Government bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Emerging markets equity [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	41		41		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	41		41		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Corporate bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	33		23		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	33		23		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Open-ended mutual funds [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets equity [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	26		28		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	26		28		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets equity [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Foreign bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	51		54		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Foreign bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	51		54		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Foreign bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Foreign bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	20		37		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	20		37		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Mutual funds [Member] | Emerging markets bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Government bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	198		241		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Government bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Government bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	198		241		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Government bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Corporate bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	52		82		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	52		82		'
Investments [Member] | FCX [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Private equity investments [Member] | Private equity investments [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	43		45		'
Investments [Member] | FCX [Member] | Private equity investments [Member] | Private equity investments [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Private equity investments [Member] | Private equity investments [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | FCX [Member] | Private equity investments [Member] | Private equity investments [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	43		45		'
Investments [Member] | FCX [Member] | Other investments [Member] | Other investments [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	29		33		'
Investments [Member] | FCX [Member] | Other investments [Member] | Other investments [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	1		1		'
Investments [Member] | FCX [Member] | Other investments [Member] | Other investments [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	28		32		'
Investments [Member] | FCX [Member] | Other investments [Member] | Other investments [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	62		69		'
Investments [Member] | PT Freeport Indonesia [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	62		69		'
Investments [Member] | PT Freeport Indonesia [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Government bonds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	23		27		'
Investments [Member] | PT Freeport Indonesia [Member] | Government bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	23		27		'
Investments [Member] | PT Freeport Indonesia [Member] | Government bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Government bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Common stocks [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	27		32		'
Investments [Member] | PT Freeport Indonesia [Member] | Common stocks [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	27		32		'
Investments [Member] | PT Freeport Indonesia [Member] | Common stocks [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Common stocks [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Mutual funds [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	12		10		'
Investments [Member] | PT Freeport Indonesia [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	12		10		'
Investments [Member] | PT Freeport Indonesia [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0		0		'
Investments [Member] | PT Freeport Indonesia [Member] | Mutual funds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair value of plan assets measurement [Line items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	$0		$0		'
[1]	Cash consisted primarily of short-term time deposits.

OTHER_LIABILITIES_INCLUDING_EM6

OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (FV, Assets Measured on Recurring Basis) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Fair Value, at the beginning of the period	$86	$85
Realized gains (losses)	1	2
Net unrealized gains (losses) related to assets still held at the end of the year	5	-1
Purchases	3	4
Sales	-1	'
Settlements, net	-4	-4
Fair Value, at the end of the period	90	86
Real estate property [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Fair Value, at the beginning of the period	41	35
Realized gains (losses)	1	2
Net unrealized gains (losses) related to assets still held at the end of the year	6	4
Purchases	0	0
Sales	-1	'
Settlements, net	0	0
Fair Value, at the end of the period	47	41
Private equity investments [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Fair Value, at the beginning of the period	45	50
Realized gains (losses)	0	0
Net unrealized gains (losses) related to assets still held at the end of the year	-1	-5
Purchases	3	4
Sales	0	'
Settlements, net	-4	-4
Fair Value, at the end of the period	$43	$45

STOCKHOLDERS_EQUITY_AND_STOCKB2

STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Details) (USD $)

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

7 Months Ended

12 Months Ended

1 Months Ended

3 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

31-May-13

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

31-May-13

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

31-May-13

31-May-13

31-May-13

31-May-13

Jun. 03, 2013

Jun. 03, 2013

Jun. 03, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Cash Settled Restricted Stock Units [Member]

Cash Settled Restricted Stock Units [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Stock Appreciation Rights (SARs) [Member]

Stock Appreciation Rights (SARs) [Member]

Stock Appreciation Rights (SARs) [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Minimum [Member]

Maximum [Member]

Freeport-McMoRan Oil & Gas [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Stock Appreciation Rights (SARs) [Member]

Cash Settled Restricted Stock Units [Member]

Employment Restructuring Arrangement [Member]

Stock Appreciation Rights (SARs) [Member]

Stock Appreciation Rights (SARs) [Member]

Restricted Stock Units (RSUs) [Member]

Cash Settled Restricted Stock Units [Member]

Restricted Stock Units (RSUs) [Member]

Stock Appreciation Rights (SARs) [Member]

Restricted Stock Units (RSUs) [Member]

Employee Stock Option [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

$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

'

$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.

STOCKHOLDERS_EQUITY_AND_STOCKB3

STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Common Stock) (Details) (USD $)	1 Months Ended			3 Months Ended		12 Months Ended
	Jul. 31, 2013	Feb. 29, 2012	Jun. 30, 2011	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2013
STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Common Stock) [Abstract]	'	'	'	'	'	'
Authorized shares of capital stock	'	'	'	1,850,000,000	'	1,850,000,000
Authorized shares of common stock	'	'	'	1,800,000,000	'	1,800,000,000
Authorized shares of preferred stock	'	'	'	50,000,000	'	50,000,000
Remaining shares available under open-market share purchase program	'	'	'	'	'	23,700,000
Authorized annual rate of common stock dividend (in dollars per share)	'	$1.25	'	'	'	'
Supplemental common stock dividend (in dollars per share)	$1	'	$0.50	'	'	'
Authorized quarterly rate of common stock dividend (in dollars per share)	'	'	'	'	'	$0.31
Dividends Payable, Date Declared	'	'	'	20-Dec-13	'	'
Dividends Payable, Date to be Paid	'	'	'	'	3-Feb-14	'
Dividends Payable, Date of Record	'	'	'	'	15-Jan-14	'

STOCKHOLDERS_EQUITY_AND_STOCKB4

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

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jun. 03, 2013

31-May-13

Jun. 03, 2013

31-May-13

Dec. 31, 2013

31-May-13

Dec. 31, 2013

Dec. 31, 2013

Jun. 03, 2013

2006 stock incentive plan [Member]

Executive Officers Performance Based [Member]

Outside Directors [Member]

Minimum [Member]

Maximum [Member]

McMoRan Exploration Co [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Cash Settled Restricted Stock Units [Member]

Stock Appreciation Rights (SARs) [Member]

Stock Appreciation Rights (SARs) [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Executive Officers Performance Based [Member]

Plains Exploration & Production Company [Member]

McMoRan Exploration Co [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

Plains Exploration & Production Company [Member]

McMoRan Exploration Co [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

STOCKHOLDERS_EQUITY_AND_STOCKB5

STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Accumulated Other Comprehensive Income) [Abstract]	'		'		'		'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	$137		($103)		($215)		'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax	33		'		'		'
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	-5		-4		-4		-3
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	10		5		6		8
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-330		-427		-388		-269
Accumulated Other Comprehensive Income (Loss), Deferred Tax Valuation Allowance	-80		-80		-79		-59
Accumulated other comprehensive loss	-405		-506		-465		-323
Unrealized gains (losses) on securities arising during the period	-1	[1],[2]	0	[1],[2]	-1	[1],[2]	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0	[1],[2]	-1	[1],[2]	-2	[1],[2]	'
Other Comprehensive Income (Loss), Pension and Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax, Portion Attributable to Parent	67	[1],[2]	-65	[1],[2]	-134	[1],[2]	'
Other Comprehensive Income (Loss), Valuation Allowance, Deferred Tax Asset, Change in Amount	0		-1	[1],[2]	-20	[1],[2]	'
Other Comprehensive Income (Loss), Net of Tax, Amount Attributable to Parent, Before Reclassification Adjustments	66	[1],[2]	-67	[1],[2]	-157	[1],[2]	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	5	[3]	0	[3]	0	[3]	'
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	30	[3]	26	[3]	15	[3]	'
Other Comprehensive Income (Loss), Net of Tax, Amount Attributable to Parent, Reclassification Adjustments	35	[3]	26	[3]	15	[3]	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax	-37		39		81		'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax	$17		$15		$8		'
[1]	Included tax benefits (provision) totaling $81 million for 2011, $39 million for 2012 and $(37) million for 2013.
[2]	Included net actuarial gains (losses), net of noncontrolling interest, totaling $(215) million for 2011, $(103) million for 2012 and $137 million for 2013. The year 2013 also included $33 million for prior service costs.
[3]	Included amortization primarily related to actuarial losses that were net of taxes of $8 million for 2011, $15 million for 2012 and $17 million for 2013.

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)

3 Months Ended

7 Months Ended

12 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jul. 31, 2012

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

McMoRan Exploration Co [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Income before income taxes and equity in affiliated companies' net earnings [Abstract]

'

'

'

'

'

'

'

'

'

'

'

United States

'

'

'

$1,104,000,000

$1,539,000,000

$2,112,000,000

'

'

'

'

'

Foreign

'

'

'

3,809,000,000

3,948,000,000

6,706,000,000

'

'

'

'

'

Total

'

'

'

4,913,000,000

5,487,000,000

8,818,000,000

'

'

'

'

'

Current income taxes:

'

'

'

'

'

'

'

'

'

'

'

Federal

'

'

'

203,000,000

238,000,000

394,000,000

'

'

'

'

'

State

'

'

'

9,000,000

7,000,000

21,000,000

'

'

'

'

'

Foreign

'

'

'

1,081,000,000

1,002,000,000

1,934,000,000

'

'

'

'

'

Total current

'

'

'

1,293,000,000

1,247,000,000

2,349,000,000

'

'

'

'

'

Deferred income taxes (benefits):

'

'

'

'

'

'

'

'

'

'

'

Federal

'

'

'

234,000,000

87,000,000

82,000,000

'

'

'

'

'

State

'

'

'

-35,000,000

18,000,000

-19,000,000

'

'

'

'

'

Foreign

'

'

'

346,000,000

363,000,000

622,000,000

'

'

'

'

'

Total deferred

'

'

'

545,000,000

468,000,000

685,000,000

'

'

'

'

'

Adjustments

'

'

'

-199,000,000

[1]

-205,000,000

[2],[3]

53,000,000

[4]

'

'

208,000,000

[2],[3]

'

205,000,000

[2],[3]

Federal operating loss carryforwards

'

'

'

-164,000,000

[5]

0

0

'

'

'

'

'

Provision for income taxes

'

'

'

1,475,000,000

1,510,000,000

3,087,000,000

'

'

'

'

'

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 Other Tax Expense (Benefit)

'

'

'

16,000,000

'

'

69,000,000

'

'

'

'

Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability, Environmental Matters

'

'

'

-76,000,000

'

'

'

'

'

'

'

Term of Stability Agreement

'

'

'

'

'

'

'

'15 years

'

'

'

Foreign Income Tax Rate Under Old Stability Agreement

'

'

'

'

'

'

'

30.00%

'

'

'

Foreign Income Tax Rate Under New Stability Agreegment

'

'

'

'

'

'

'

32.00%

'

'

'

Deferred Foreign Income Tax Expense from New Stability Agreement

'

'

'

'

'

'

'

'

'

29,000,000

'

Deferred Foreign Income Tax Expense (Benefit) Associated with Foreign Reinvested Profits

'

'

'

'

'

'

'

'

'

234,000,000

'

Additional Tax Expense From New Legislation On Mining Royalties

'

'

'

'

'

'

'

'

'

'

53,000,000

Income tax expense (benefit), reconciliation [Abstract]

'

'

'

'

'

'

'

'

'

'

'

U.S. federal statutory tax rate

'

'

'

1,720,000,000

1,920,000,000

3,086,000,000

'

'

'

'

'

Foreign tax credit limitation

'

'

'

117,000,000

110,000,000

163,000,000

'

'

'

'

'

Percentage depletion

'

'

'

-223,000,000

-263,000,000

-283,000,000

'

'

'

'

'

Withholding and other impacts on foreign earnings

'

'

'

83,000,000

-221,000,000

[6]

170,000,000

'

'

'

'

'

Valuation allowance on minimum tax credits

'

'

'

190,000,000

[7]

9,000,000

47,000,000

'

'

'

'

'

State income taxes

'

'

'

-43,000,000

17,000,000

0

'

'

'

'

'

Other items, net

'

'

'

11,000,000

[7]

-44,000,000

-2,000,000

'

'

'

'

'

Provision for income taxes

'

'

'

1,475,000,000

1,510,000,000

3,087,000,000

'

'

'

'

'

Effective income tax rate, reconciliation [Abstract]

'

'

'

'

'

'

'

'

'

'

'

U.S. federal statutory tax rate

'

'

35.00%

35.00%

35.00%

35.00%

'

'

'

'

'

Foreign tax credit limitation

'

'

'

2.00%

2.00%

2.00%

'

'

'

'

'

Percentage depletion

'

'

'

-5.00%

-5.00%

-3.00%

'

'

'

'

'

Withholding taxes

'

'

'

2.00%

-4.00%

2.00%

'

'

'

'

'

Valuation allowance on minimum tax credits

'

'

'

-4.00%

0.00%

-1.00%

'

'

'

'

'

State income taxes

'

'

3.00%

0.00%

0.00%

0.00%

'

'

'

'

'

Other items, net

'

'

'

0.00%

0.00%

0.00%

'

'

'

'

'

Provision for income taxes

'

'

'

30.00%

28.00%

35.00%

'

'

'

'

'

Total income taxes paid to all jurisdictions

'

'

'

1,300,000,000

1,800,000,000

3,400,000,000

'

'

'

'

'

Tax refunds received from all jurisdictions

'

'

'

270,000,000

69,000,000

15,000,000

'

'

'

'

'

Deferred tax assets:

'

'

'

'

'

'

'

'

'

'

'

Foreign tax credits

2,144,000,000

'

2,144,000,000

2,144,000,000

2,022,000,000

'

'

'

'

'

'

Accrued expenses

1,098,000,000

'

1,098,000,000

1,098,000,000

819,000,000

'

'

'

'

'

'

Minimum tax credits

603,000,000

'

603,000,000

603,000,000

474,000,000

'

'

'

'

'

'

Net operating loss carryforwards

925,000,000

'

925,000,000

925,000,000

343,000,000

'

'

'

'

'

'

Employee benefit plans

443,000,000

'

443,000,000

443,000,000

315,000,000

'

'

'

'

'

'

Other

557,000,000

'

557,000,000

557,000,000

374,000,000

'

'

'

'

'

'

Deferred tax assets

5,770,000,000

'

5,770,000,000

5,770,000,000

4,347,000,000

'

'

'

'

'

'

Valuation allowances

-2,487,000,000

'

-2,487,000,000

-2,487,000,000

-2,443,000,000

'

'

'

'

'

'

Net deferred tax assets

3,283,000,000

'

3,283,000,000

3,283,000,000

1,904,000,000

'

'

'

'

'

'

Deferred tax liabilities:

'

'

'

'

'

'

'

'

'

'

'

Property, plant, equipment and development costs

-4,887,000,000

'

-4,887,000,000

-4,887,000,000

-4,462,000,000

'

'

'

'

'

'

Oil and gas properties

-4,708,000,000

'

-4,708,000,000

-4,708,000,000

0

'

'

'

'

'

'

Undistributed earnings

-936,000,000

'

-936,000,000

-936,000,000

-884,000,000

'

'

'

'

'

'

Other

-34,000,000

'

-34,000,000

-34,000,000

-70,000,000

'

'

'

'

'

'

Total deferred tax liabilities

-10,565,000,000

'

-10,565,000,000

-10,565,000,000

-5,416,000,000

'

'

'

'

'

'

Net deferred tax liabilities

-7,282,000,000

'

-7,282,000,000

-7,282,000,000

-3,512,000,000

'

'

'

'

'

'

Valuation allowance on deferred tax asset increase (decrease) during period

'

'

'

$44,000,000

'

'

'

'

'

'

'

[1]

As a result of the oil and gas acquisitions, FCX recognized a net tax benefit of $199 million consisting of income tax benefits of $190 million associated with net reductions in FCX's valuation allowances, $69 million related to the release of the deferred tax liability on PXP's investment in MMR common stock and $16 million associated with the revaluation of state deferred tax liabilities, partially offset by income tax expense of $76 million associated with the write off of deferred tax assets related to environmental liabilities.

[2]

With the exception of TFM, FCX has not elected to permanently reinvest earnings from its foreign subsidiaries and has recorded deferred tax liabilities for foreign earnings that are available to be repatriated to the U.S. Cerro Verde previously recorded deferred Peruvian income tax liabilities for income taxes that would become payable if the reinvested profits used to fund the initial Cerro Verde sulfide expansion were distributed prior to the expiration of Cerro Verde's 1998 stability agreement on December 31, 2013. Because reinvested profits at Cerro Verde were not expected to be distributed prior to December 31, 2013, a net deferred income tax liability of $234 million was reversed and recognized as an income tax benefit in 2012.

[3]

In 2012, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde) signed a new 15-year mining stability agreement with the Peruvian government, which became effective January 1, 2014. In connection with the new mining stability agreement, Cerro Verde's income tax rate increased from 30 percent to 32 percent, and FCX recognized additional deferred tax expense of $29 million.

[4]

In September 2011, Peru enacted a new mining tax and royalty regime and also created a special mining burden that companies with stability agreements could elect to pay. Cerro Verde elected to pay this special mining burden during the remaining term of its 1998 stability agreement, which expired on December 31, 2013. As a result, Cerro Verde recognized additional tax expense of $53 million

[5]

Benefit from the use of federal operating loss carryforwards acquired as part of the oil and gas acquisitions.

[6]

Included the reversal of Cerro Verde's deferred income tax liability of $234 million.

[7]

Included a net tax benefit of $199 million as a result of the oil and gas acquisitions.

INCOME_TAXES_Tax_Credit_Carryf

INCOME TAXES (Tax Credit Carryforward) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

DRC Net Operating Loss Carryforwards [Member]

U.S. state net operating loss carryforwards [Member]

Spanish net operating loss carryforwards [Member]

U.S. Federal Net Operating Loss Carryforwards [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

U.S. foreign tax credit carryforwards [Member]

U.S. state net operating loss carryforwards [Member]

Spanish net operating loss carryforwards [Member]

U.S. Federal Net Operating Loss Carryforwards [Member]

U.S. foreign tax credit carryforwards [Member]

U.S. state net operating loss carryforwards [Member]

Spanish net operating loss carryforwards [Member]

U.S. Federal Net Operating Loss Carryforwards [Member]

Tax credit carryforward [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Tax Assets, Tax Credit Carryforwards, Foreign

$2,144

$2,022

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax

603

474

'

'

'

'

'

'

'

'

'

'

'

'

Tax credit carryforward, amount

'

'

$70

$2,300

$629

$1,700

'

'

'

'

'

'

'

'

Tax credit carryforward, expiration dates

'

'

'

'

'

'

1-Jan-14

1-Jan-14

1-Jan-15

1-Jan-22

31-Dec-23

31-Dec-33

31-Dec-30

31-Dec-33

INCOME_TAXES_Reserve_for_Unrec

INCOME TAXES (Reserve for Unrecognized tax benefits, interest and penalties) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Decreases:	'	'
Amount of unrecognized tax benefit that could impact provision for income taxes	$97	'
Amount of unrecognized tax benefit that could impact provision for income taxes, net of tax benefits	49	'
Unrecognized Tax Benefits [Member]	'	'
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items]	'	'
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance	138	146
Additions:	'	'
Prior year tax positions	18	17
Current year tax positions	14	24
Acquisition of PXP	5	'
Interest and penalties	0	0
Decreases:	'	'
Prior year tax positions	-37	-37
Current year tax positions	0	0
Settlements with tax authorities	0	-11
Lapse of statute of limitations	-28	-1
Interest and penalties	0	0
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance	110	138
Interest [Member]	'	'
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items]	'	'
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance	31	34
Additions:	'	'
Interest and penalties	7	3
Decreases:	'	'
Interest and penalties	-17	-6
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance	21	31
Penalties [Member]	'	'
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items]	'	'
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance	0	0
Additions:	'	'
Interest and penalties	0	0
Decreases:	'	'
Interest and penalties	0	0
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance	$0	$0

INCOME_TAXES_Summary_of_Income

INCOME TAXES (Summary of Income Tax Examinations) (Details)	12 Months Ended
	Dec. 31, 2013
U.S. Federal [Member]	'
Income Tax Examination [Line Items]	'
Additional Open Years Subject To Income Tax Examination	'2013
Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Additional Open Years Subject To Income Tax Examination	'2013
Minimum [Member] | U.S. Federal [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2007
Minimum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Additional Open Years Subject To Income Tax Examination	'2009
Minimum [Member] | Peru [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2009
Additional Open Years Subject To Income Tax Examination	'2011
Minimum [Member] | Chile [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2011
Additional Open Years Subject To Income Tax Examination	'2013
Minimum [Member] | Africa [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2010
Additional Open Years Subject To Income Tax Examination	'2013
Maximum [Member] | U.S. Federal [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2012
Maximum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Additional Open Years Subject To Income Tax Examination	'2010
Maximum [Member] | Peru [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2010
Additional Open Years Subject To Income Tax Examination	'2013
Maximum [Member] | Chile [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2012
Maximum [Member] | Africa [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2012
Period 1 [Member] | Minimum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2005
Period 1 [Member] | Maximum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2008
Period 2 [Member] | Minimum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2011
Period 2 [Member] | Maximum [Member] | Indonesia [Member]	'
Income Tax Examination [Line Items]	'
Income Tax Examination, Year under Examination	'2012

INCOME_TAXES_Mining_Royalty_Ta

INCOME TAXES (Mining Royalty Taxes) (Details) (Chile [Member])

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Stabilized Rate [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Special Mining Burden [Member]

Mining royalty taxes by location [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mining royalty tax rate

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

4.00%

5.00%

5.00%

5.00%

5.00%

5.00%

5.00%

4.00%

4.00%

4.00%

14.00%

14.00%

14.00%

14.00%

14.00%

14.00%

9.00%

9.00%

9.00%

CONTINGENCIES_Details

CONTINGENCIES (Details)

12 Months Ended

1 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Jul. 31, 2013

Dec. 31, 2013

Oct. 31, 2010

Nov. 30, 2011

Mar. 31, 2012

Mar. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Oct. 31, 2010

Nov. 30, 2011

Mar. 31, 2012

Mar. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Oct. 31, 2010

Nov. 30, 2011

Mar. 31, 2012

Mar. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

USD ($)

USD ($)

USD ($)

Cerro Verde [Member]

Cerro Verde [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

Relating To 2005 [Member]

Relating To 2006 [Member]

Relating To 2007 [Member]

Relating To 2008 [Member]

Relating To 2011 [Member]

Relating To 2011 [Member]

Relating To 2005 and 2007 [Member]

Relating to the Period October 2006 through December 2008 [Member]

Relating to the Period October 2006 through December 2008 [Member]

Relating to 2009 [Member]

Relating to 2009 [Member]

Tax Assessment [Member]

Tax Assessment [Member]

Tax Assessment [Member]

Tax Assessment [Member]

Tax Assessment [Member]

Tax Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Interest Assessment [Member]

Other Assets [Member]

Minimum [Member]

Maximum [Member]

USD ($)

USD ($)

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

PT Freeport Indonesia [Member]

Relating To 2005 [Member]

Relating To 2006 [Member]

Relating To 2007 [Member]

Relating To 2008 [Member]

Relating To 2011 [Member]

PT Freeport Indonesia [Member]

Relating To 2005 [Member]

Relating To 2006 [Member]

Relating To 2007 [Member]

Relating To 2008 [Member]

Relating To 2011 [Member]

Relating to the Period October 2006 through December 2008 [Member]

PT Freeport Indonesia [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

PEN

USD ($)

PEN

USD ($)

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

USD ($)

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

Cerro Verde [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Site Contingency [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reasonably Possible Interest Penalties

'

'

'

7.00%

18.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum number of active remediation projects in the United States (in number of projects)

100

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Approximate number of states with active remediation projects (in number of states)

28

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assessment By Foreign Government of Alleged Obligations, Expressed in Foreign Currency

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

492

'

206

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assessment By Foreign Government Of Alleged Obligations

'

'

'

'

'

'

502

152

32

135

114

'

69

'

176

'

74

'

334

103

22

91

62

56

168

49

10

44

52

13

104

'

Assessment By Foreign Government Of Alleged Obligations, Net of Noncontrolling Interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

94

'

39

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax Overpayment, Amount Agreed to by Tax Authority

'

'

'

'

'

'

291

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax Overpayment

'

'

'

'

'

'

320

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Income Tax Refunds

270

69

15

'

'

165

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Disputed Tax Assessments Receivable

'

'

'

'

'

'

'

'

'

'

'

$22

'

$126

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$255

CONTINGENCIES_Environmental_Ob

CONTINGENCIES (Environmental Obligations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accrual for Environmental Loss Contingencies [Roll Forward]	'		'		'
Balance at beginning of year	$1,222,000,000		$1,453,000,000		$1,422,000,000
Accretion Expense	79,000,000	[1]	80,000,000	[1]	88,000,000	[1]
Additions	73,000,000		70,000,000		132,000,000
Reductions	-77,000,000	[2]	-182,000,000	[2]	-68,000,000	[2]
Spending	-130,000,000		-199,000,000		-121,000,000
Balance at end of year	1,167,000,000		1,222,000,000		1,453,000,000
Less current portion	121,000,000		186,000,000		205,000,000
Long-term portion	1,046,000,000		1,036,000,000		1,248,000,000
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]	'		'		'
2014	121,000,000		'		'
2015	151,000,000		'		'
2016	116,000,000		'		'
2017	122,000,000		'		'
2018	110,000,000		'		'
Thereafter	2,000,000,000		'		'
Estimated Environmental Obligations on a Discounted Fair Value Basis	1,100,000,000		'		'
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	2,600,000,000		'		'
Recorded environmental obligations for most significant sites	1,000,000,000		'		'
Minimum [Member]	'		'		'
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]	'		'		'
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	2,100,000,000		'		'
Maximum [Member]	'		'		'
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]	'		'		'
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	$2,700,000,000		'		'
[1]	Represented accretion of the fair value of environmental obligations assumed in the 2007 acquisition of FMC, which were determined on a discounted cash flow basis.
[2]	Reductions primarily reflected revisions for changes in the anticipated scope and timing of environmental remediation projects and the noncash adjustments of environmental matters.

CONTINGENCIES_Asset_Retirement

CONTINGENCIES (Asset Retirement Obligations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Balance at beginning of year	$1,146,000,000	$921,000,000		$856,000,000
Liabilities assumed in the acquisitions of PXP and MMR	'	0	[1]	0	[1]
Liabilities incurred	45,000,000	6,000,000		9,000,000
Settlements and revisions to cash flow estimates, net	123,000,000	211,000,000		48,000,000
Accretion expense	95,000,000	55,000,000		58,000,000
Spending	-107,000,000	-47,000,000		-49,000,000
Other	-2,000,000	0		-1,000,000
Balance at end of year	2,328,000,000	1,146,000,000		921,000,000
Less current portion	-115,000,000	-55,000,000		-31,000,000
Long-term portion	2,213,000,000	1,091,000,000		890,000,000
Fair Value Assumptions, Inflation Rate	2.50%	'		'
Financial Assurance Obligations Associated With Closure And Reclamation Costs	2,400,000,000	'		'
Financial Assurance Obligations Associated With Closure And Reclamation Costs In Form Of Parent Company Guarantees And Financial Capability Demonstrations	1,700,000,000	'		'
Legally Restricted Funds For Asset Retirement Obligations	158,000,000	161,000,000		'
Productive Oil Wells, Number of Wells, Gross	6,600	'		'
Asset Retirement Obligations, Number of Platforms	200	'		'
New Mexico environmental and reclamation programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	465,000,000	'		'
Arizona environmental and reclamation programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	237,000,000	'		'
Colorado Environmental And Reclamation Programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	50,000,000	'		'
Chile environmental and reclamation programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	69,000,000	'		'
Peru Environmental and Reclamation Programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	79,000,000	'		'
PT Freeport Indonesia environmental and reclamation programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Accrued reclamation and closure costs	249,000,000	'		'
Estimated years the mining activities are expected to continue (in years)	'30 years	'		'
Current cash balance of reclamation fund	18,000,000	'		'
Minimum [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Fair Value Assumptions, Risk Free Interest Rate	1.30%	'		'
Maximum [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Fair Value Assumptions, Risk Free Interest Rate	6.30%	'		'
Scenario, Forecast [Member] | Minimum [Member] | PT Freeport Indonesia environmental and reclamation programs [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Current cash balance of reclamation fund	100,000,000	'		'
Plains Exploration & Production Company [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Liabilities assumed in the acquisitions of PXP and MMR	741,000,000	'		'
McMoRan Exploration Co [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Liabilities assumed in the acquisitions of PXP and MMR	287,000,000	'		'
Freeport-McMoRan Oil & Gas [Member]	'	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'		'
Long-term portion	$1,100,000,000	'		'
[1]	The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $287 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.

CONTINGENCIES_Other_Contingenc

CONTINGENCIES (Other Contingencies) (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
				PT Freeport Indonesia [Member]	PT Freeport Indonesia [Member]	PT Freeport Indonesia [Member]
Other contingencies by location [Line Items]	'	'	'	'	'	'
Cap For Indemnity Obligations Provided Upon Sale Agreement Related To Former Subsidiary	$107	'	'	'	'	'
Outstanding Standby Letters Of Credit	326	'	'	'	'	'
Outstanding Surety Bonds Total	331	'	'	'	'	'
Portion Of Surety Bonds Related To Reclamation And Closing Costs	268	'	'	'	'	'
Portion Of Surety Bonds Related To Workers Compensation Self Insurance	21	'	'	'	'	'
Other Surety Bonds	42	'	'	'	'	'
Self Insurance Reserve	52	'	'	'	'	'
Self Insurance Reserve, Current	8	'	'	'	'	'
Self Insurance Reserve, Noncurrent	44	'	'	'	'	'
Estimated Insurance Recoveries	'	'	'	'	63	'
Gain on insurance settlement	$0	$59	$0	$59	$59	$59

COMMITMENTS_AND_GUARANTEES_Det

COMMITMENTS AND GUARANTEES (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating leases, future minimum payments due: [Abstract]	'	'	'
2014	$45	'	'
2015	42	'	'
2016	42	'	'
2017	40	'	'
2018	35	'	'
Thereafter	132	'	'
Total aggregate rental expense under operating leases	$96	$77	$70

COMMITMENTS_AND_GUARANTEES_Con

COMMITMENTS AND GUARANTEES (Contractual Obligations) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	$4,700	'
2014	1,379	'
2015	1,313	'
2016	863	'
2017	686	'
2018	142	'
Thereafter	327	'
Derivative Liability	320	20
Copper concentrates [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	800	'
Electricity [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	471	'
Transportation [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	853	'
Freeport-McMoRan Oil & Gas [Member] | Ultra-deepwater Drillship Contracts [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	1,500	'
Freeport-McMoRan Oil & Gas [Member] | Deferred Option Premiums and Accrued Interest [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Unconditional purchase obligations	454	'
Deferred Option Premiums and Accrued Interest [Member]	'	'
Unconditional purchase obligations [Line Items]	'	'
Derivative Liability	$444	'

COMMITMENTS_AND_GUARANTEES_Min

COMMITMENTS AND GUARANTEES (Mining Contracts) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Contractual obligations mining contracts [line items]	'	'	'
Number of Extention Periods Available Under Mining Contract	2	'	'
PT Freeport Indonesia [Member]	'	'	'
Contractual obligations mining contracts [line items]	'	'	'
Period For Option To Extend Mining Contract	'10 years	'	'
Number Of Years Working With Foreign Government	'40 years	'	'
Gold And Silver Sales Royalty Rate (in hundredths)	1.00%	'	'
Quantity of ore produced subject to additional royalties	200,000	'	'
Royalty Expense	$109	$93	$137
Product Exports Ban, Date	12-Jan-17	'	'
Tenke Fungurume [Member]	'	'	'
Contractual obligations mining contracts [line items]	'	'	'
Royalty Expense	29	25	24
Royalty Rate Payable Under Amended And Restated Mining Convention (in hundredths)	2.00%	'	'
Percentage of mining property owned by the company	56.00%	57.75%	'
Conversion of intercompany loans	$50	'	'
Minimum [Member] | PT Freeport Indonesia [Member]	'	'	'
Contractual obligations mining contracts [line items]	'	'	'
Copper Royalty Rate Payable (in hundredths)	1.50%	'	'
Price Of Copper Per Pound	0.9	'	'
Progressive Export Duty on Copper Concentrates, Percent	25.00%	'	'
Maximum [Member] | PT Freeport Indonesia [Member]	'	'	'
Contractual obligations mining contracts [line items]	'	'	'
Copper Royalty Rate Payable (in hundredths)	3.50%	'	'
Price Of Copper Per Pound	1.1	'	'
Progressive Export Duty on Copper Concentrates, Percent	60.00%	'	'

COMMITMENTS_AND_GUARANTEES_Com

COMMITMENTS AND GUARANTEES (Community Development Programs) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
PT Freeport Indonesia [Member]	'	'	'
Contractual obligations community development programs [line items]	'	'	'
Percentage of annual revenue committed for the development of the local people in the area of operations	1.00%	'	'
Amount charged to cost of sales for the commitment	$41	$39	$50
Tenke Fungurume [Member]	'	'	'
Contractual obligations community development programs [line items]	'	'	'
Amount charged to cost of sales for the commitment	$4	$4	$4
Percentage of net sales revenue from production to community development fund to assist the local communities with development of local infrastructure and related services	0.30%	'	'

COMMITMENTS_AND_GUARANTEES_Fin

COMMITMENTS AND GUARANTEES (Financial Guarantees) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Morenci [Member]	'
Financial guarantees [line items]	'
Percentage of undivided interest in the Morenci complex	85.00%
Maximum potential payment the company is obligated to make to Sumitomo upon exercise of the put option	$267
Sumitomo's Share in Joint Venture [Member]	'
Financial guarantees [line items]	'
Percentage of undivided interest owned by third party	15.00%

FINANCIAL_INSTRUMENTS_Unrealiz

FINANCIAL INSTRUMENTS (Unrealized gains losses) (Details) (Commodity Contract [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Embedded derivatives in provisional sales contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Atlantic Copper [Member] | Amounts recorded in Sales [Member]	'		'		'
Realized gains (losses):	'		'		'
Realized and unrealized gains (losses)	($136)	[1]	$77	[1]	($519)	[1]
Crude Oil Options [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Plains Exploration & Production Company [Member] | Amounts recorded in Sales [Member]	'		'		'
Realized gains (losses):	'		'		'
Realized and unrealized gains (losses)	-344	[1]	0	[1]	0	[1]
Natural Gas Swaps [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Plains Exploration & Production Company [Member] | Amounts recorded in Sales [Member]	'		'		'
Realized gains (losses):	'		'		'
Realized and unrealized gains (losses)	10	[1]	0	[1]	0	[1]
Copper Forward Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Atlantic Copper [Member] | Amounts recorded in Cost of Sales [Member]	'		'		'
Realized gains (losses):	'		'		'
Realized and unrealized gains (losses)	3	[2]	15	[2]	-2	[2]
Fair Value Hedging [Member] | Amounts recorded in Sales [Member]	'		'		'
Unrealized gains (losses):	'		'		'
Derivative financial instruments	1		15		-28
Hedged item	-1		-15		28
Realized gains (losses):	'		'		'
Matured derivative financial instruments	($17)		($2)		($28)
[1]	Amounts recorded in revenues.
[2]	Amounts recorded in cost of sales as production and delivery costs.

FINANCIAL_INSTRUMENTS_Unsettle

FINANCIAL INSTRUMENTS (Unsettled Derivatives) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Derivatives, Fair Value [Line Items]	'		'
Paid to brokers associated with margin requirements	$1		$7
Derivative Asset	59		33
Derivative Liability	320		20
Trade accounts receivable [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative Asset	53		24
Derivative Liability	0		9
Other current assets [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative Asset	6		5
Derivative Liability	0		0
Accounts payable and accrued liabilities [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative Asset	0		4
Derivative Liability	205		11
Other Liabilities [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative Asset	0		0
Derivative Liability	115		0
Commodity Contract [Member] | Designated as Hedging Instrument [Member] | Copper Futures and Swap Contracts [Member] | Other current assets [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset position	6	[1]	5	[1]
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset position	69		41
Liability position	330		28
Derivative Asset, Fair Value, Gross Liability	10		8
Derivative Liability, Fair Value, Gross Asset	10		8
Derivative Asset	59		33
Derivative Liability	320		20
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Natural Gas Swaps [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability position	4		0
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Copper Futures and Swap Contracts [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability position	0	[1]	1	[1]
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Embedded derivatives in provisional sales purchases contracts [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset position	63		36
Liability position	16		27
Derivative Asset, Fair Value, Gross Liability	10		8
Derivative Liability, Fair Value, Gross Asset	10		8
Derivative Asset	53		28
Derivative Liability	6		19
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Crude Oil Options [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability position	309	[2]	0	[2]
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Copper Forward Contracts [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability position	1		0
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Crude Oil and Natural Gas Derivatives [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset position	0		0
Liability position	313		0
Derivative Asset, Fair Value, Gross Liability	0		0
Derivative Liability, Fair Value, Gross Asset	0		0
Derivative Asset	0		0
Derivative Liability	313		0
Commodity Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Copper Derivatives [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset position	6		5
Liability position	1		1
Derivative Asset, Fair Value, Gross Liability	0		0
Derivative Liability, Fair Value, Gross Asset	0		0
Derivative Asset	6		5
Derivative Liability	$1		$1
[1]	FCX had paid $1 million to brokers at December 31, 2013, and $7 million at December 31, 2012, for margin requirements (recorded in other current assets).
[2]	Included $444 million for deferred premiums and accrued interest at December 31, 2013.

FINANCIAL_INSTRUMENTS_Derivati

FINANCIAL INSTRUMENTS (Derivative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2009
In Millions, unless otherwise specified
Derivative [Line Items]	'	'	'	'
Credit Derivative, Maximum Exposure, Undiscounted	$54	'	'	'
Cash and cash equivalents	1,985	3,705	4,822	3,738
Embedded derivatives in provisional sales contracts, Copper [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative held (in lbs except gold in oz)	673,000,000	'	'	'
Average contract price	3.24	'	'	'
Average market price	3.34	'	'	'
Embedded derivatives in provisional sales contracts, Gold [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative held (in lbs except gold in oz)	254,000	'	'	'
Average contract price	1,245	'	'	'
Average market price	1,202	'	'	'
Embedded derivatives in provisional purchase contracts, Copper [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative held (in lbs except gold in oz)	60,000,000	'	'	'
Average contract price	3.26	'	'	'
Average market price	3.34	'	'	'
Atlantic Copper [Member] | Copper Forward Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative held (in lbs except gold in oz)	10,000,000	'	'	'
Average contract price	3.27	'	'	'
Maximum [Member] | Embedded derivatives in provisional sales contracts, Copper [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Maturities	'June 2014	'	'	'
Maximum [Member] | Embedded derivatives in provisional sales contracts, Gold [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Maturities	'April 2014	'	'	'
Maximum [Member] | Embedded derivatives in provisional purchase contracts, Copper [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Maturities	'April 2014	'	'	'
Maximum [Member] | Atlantic Copper [Member] | Copper Forward Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Maturities	'February 2014	'	'	'
Fair Value Hedging [Member] | Commodity Contract [Member] | Derivatives Designated as Hedging Instrument [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative held (in lbs except gold in oz)	44,000,000	'	'	'
Average contract price	3.28	'	'	'
Fair Value Hedging [Member] | Maximum [Member] | Commodity Contract [Member] | Derivatives Designated as Hedging Instrument [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Maturities	'November 2014	'	'	'
Bank Time Deposits [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Cash and cash equivalents	$211	$514	'	'

FINANCIAL_INSTRUMENTS_Oil_and_

FINANCIAL INSTRUMENTS (Oil and Gas) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

Deferred Option Premiums and Accrued Interest [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Natural Gas Swaps [Member]

Natural Gas Swaps [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

2014 Positions [Member]

2014 Positions [Member]

2014 Positions [Member]

2015 Positions [Member]

Derivatives Not Designated as Hedging Instruments [Member]

2014 Positions [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

MMBTU

Derivatives Not Designated as Hedging Instruments [Member]

2014 Positions [Member]

2014 Positions [Member]

2014 Positions [Member]

2015 Positions [Member]

75 MBbls [Member]

30 MBbls [Member]

5 MBbls [Member]

84 MBbls [Member]

MMBTU

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Derivatives Not Designated as Hedging Instruments [Member]

Put Option [Member]

Put Option [Member]

Put Option [Member]

Put Option [Member]

75 MBbls [Member]

30 MBbls [Member]

5 MBbls [Member]

84 MBbls [Member]

MBbls

MBbls

MBbls

MBbls

Put Option [Member]

Put Option [Member]

Put Option [Member]

Put Option [Member]

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability

$320

$20

$444

'

'

'

'

'

'

'

'

'

'

'

Derivative, Nonmonetary Notional Amount

'

'

'

75

[1]

30

[1]

5

[1]

84

[1]

37,000,000

100,000

'

'

'

'

'

Derivative, Average Floor Price

'

'

'

90

[1],[2]

95

[1],[2]

100

[1],[2]

90

[1],[2]

'

'

'

'

'

'

'

Derivative, Average Floor Price Limit

'

'

'

70

[1],[2]

75

[1],[2]

80

[1],[2]

70

[1],[2]

'

'

'

'

'

'

'

Deferred Premium Price

'

'

'

'

'

'

'

'

'

6.33

5.74

[1]

6.09

[1]

7.11

[1]

6.89

[1]

Derivative, Underlying Basis

'

'

'

'Brent

'Brent

'Brent

'Brent

'

'

'

'

'

'

'

Maximum Price Limit per Barrel

20

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative, Swap Type, Fixed Price

'

'

'

'

'

'

'

'

4.09

'

'

'

'

'

Derivative Latest Maturity Period

'

'

'

'

'

'

'

'

'December 2014

'

'

'

'

'

[1]

If the index price is less than the per barrel floor, FCX receives the difference between the per barrel floor and the index price up to a maximum of $20 per barrel less the option premium. If the index price is at or above the per barrel floor, FCX pays the option premium and no cash settlement is received.

[2]

The average strike prices do not reflect any premiums to purchase the put options.

FAIR_VALUE_MEASUREMENT_Details

FAIR VALUE MEASUREMENT (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

In Millions, unless otherwise specified

Bank Time Deposits [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Natural Gas Swaps [Member]

Natural Gas Swaps [Member]

Natural Gas Swaps [Member]

Natural Gas Swaps [Member]

Natural Gas Swaps [Member]

Copper Forward Contracts [Member]

Copper Forward Contracts [Member]

Copper Forward Contracts [Member]

Copper Forward Contracts [Member]

Copper Forward Contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Warrant [Member]

Warrant [Member]

Warrant [Member]

Warrant [Member]

Warrant [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

U.S. core fixed income fund [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Money market funds [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Government mortgage-backed securities [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Government bonds and notes [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Asset-backed securities [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Municipal bonds [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Embedded derivatives in provisional sales/purchases contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Copper futures and swap contracts [Member]

Bank Time Deposits [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Minimum [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Carrying Amount, Fair Value Disclosure [Member]

Cost-method investments [Member]

Cost-method investments [Member]

Cost-method investments [Member]

Cost-method investments [Member]

Cost-method investments [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Measurements, Recurring [Member]

Carrying Amount, Fair Value Disclosure [Member]

Estimate of Fair Value, Fair Value Disclosure [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Investment securities (current and long-term):

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment securities

'

'

'

$44

[1],[2]

$492

$44

[1],[2]

$585

$23

[1],[2]

$24

$21

[1],[2]

$561

$0

[1],[2]

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$21

[1],[2]

$22

[1],[2]

$21

[1],[2]

$22

[1],[2]

$0

[1],[2]

$0

[1],[2]

$21

[1],[2]

$22

[1],[2]

$0

[1],[2]

$0

[1],[2]

$18

[1],[2]

$16

[1],[2]

$18

[1],[2]

$16

[1],[2]

$18

[1],[2]

$16

[1],[2]

$0

[1],[2]

$0

[1],[2]

$0

[1],[2]

$0

[1],[2]

$5

[1],[2]

$8

[1],[2]

$5

[1],[2]

$8

[1],[2]

$5

[1],[2]

$8

[1],[2]

$0

[1],[2]

$0

[1],[2]

$0

[1],[2]

$0

[1],[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$446

[3]

$539

[3]

$0

[3]

$539

[3]

$0

[3]

'

'

'

Legally restricted funds (long-term):

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Legally restricted funds

'

'

'

182

[1],[2],[4]

163

[1],[2]

182

[1],[2],[4]

163

[1],[2]

28

[1],[2],[4]

7

[1],[2]

154

[1],[2],[4]

156

[1],[2]

0

[1],[2],[4]

0

[1],[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

48

[1],[2],[4]

50

[1],[2]

48

[1],[2],[4]

50

[1],[2]

0

[1],[2],[4]

0

[1],[2]

48

[1],[2],[4]

50

[1],[2]

0

[1],[2],[4]

0

[1],[2]

28

[1],[2],[4]

7

[1],[2]

28

[1],[2],[4]

7

[1],[2]

28

[1],[2],[4]

7

[1],[2]

0

[1],[2],[4]

0

[1],[2]

0

[1],[2],[4]

0

[1],[2]

'

'

'

'

'

'

'

'

'

'

34

[1],[2],[4]

36

[1],[2]

34

[1],[2],[4]

36

[1],[2]

0

[1],[2],[4]

0

[1],[2]

34

[1],[2],[4]

36

[1],[2]

0

[1],[2],[4]

0

[1],[2]

28

[1],[2],[4]

30

[1],[2]

28

[1],[2],[4]

30

[1],[2]

0

[1],[2],[4]

0

[1],[2]

28

[1],[2],[4]

30

[1],[2]

0

[1],[2],[4]

0

[1],[2]

28

[1],[2],[4]

24

[1],[2]

28

[1],[2],[4]

24

[1],[2]

0

[1],[2],[4]

0

[1],[2]

28

[1],[2],[4]

24

[1],[2]

0

[1],[2],[4]

0

[1],[2]

15

[1],[2],[4]

15

[1],[2]

15

[1],[2],[4]

15

[1],[2]

0

[1],[2],[4]

0

[1],[2]

15

[1],[2],[4]

15

[1],[2]

0

[1],[2],[4]

0

[1],[2]

1

[1],[2],[4]

1

[1],[2]

1

[1],[2],[4]

1

[1],[2]

0

[1],[2],[4]

0

[1],[2]

1

[1],[2],[4]

1

[1],[2]

0

[1],[2],[4]

0

[1],[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivatives:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Asset

59

33

'

69

[2],[5]

41

[2],[5]

69

[2],[5]

41

[2],[5]

5

[2],[5]

5

[2],[5]

64

[2],[5]

36

[2],[5]

0

[2],[5]

0

[2],[5]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

63

[2],[5]

36

[2],[5]

63

[2],[5]

36

[2],[5]

0

[2],[5]

0

[2],[5]

63

[2],[5]

36

[2],[5]

0

[2],[5]

0

[2],[5]

6

[2],[5]

5

[2],[5]

6

[2],[5]

5

[2],[5]

5

[2],[5]

5

[2],[5]

1

[2],[5]

0

[2],[5]

0

[2],[5]

0

[2],[5]

'

'

'

'

'

'

'

'

'

'

Total assets

'

'

'

'

'

295

789

56

36

239

753

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivatives: [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability

320

20

'

332

[2]

28

[2],[5]

332

[2]

28

[2],[5]

1

[2]

1

[2],[5]

20

[2]

27

[2],[5]

311

[2]

0

[2],[5]

16

[2],[5]

27

[2],[5]

16

[2],[5]

27

[2],[5]

0

[2],[5]

0

[2],[5]

16

[2],[5]

27

[2],[5]

0

[2],[5]

0

[2],[5]

309

[2],[5]

309

[2],[5]

0

[2],[5]

0

[2],[5]

309

[2],[5]

4

[2]

4

[2]

0

[2]

4

[2]

0

[2]

1

[2],[5]

1

[2],[5]

1

[2],[5]

0

[2],[5]

0

[2],[5]

1

[2],[5]

1

[2],[5]

1

[2],[5]

0

[2],[5]

0

[2],[5]

2

[2],[6]

2

[2],[6]

0

[2],[6]

0

[2],[6]

2

[2],[6]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-309

0

'

Long-term debt, including current portion

'

'

'

20,706

[7]

3,527

[7]

20,487

[7]

3,589

[7]

0

[7]

0

[7]

20,487

[7]

3,589

[7]

0

[7]

0

[7]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total liabilities

'

'

'

'

'

20,819

3,617

1

1

20,507

3,616

311

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Legally restricted funds

$392

[8]

$163

[8]

$210

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$210

'

'

'

'

'

'

'

'

'

Dividend Rate of Investee Preferred Stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.75%

'

'

'

'

'

'

'

'

Fair Value Assumptions, Implied Volatility Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

17.00%

[1]

Current portion included in other current assets and long-term portion included in other assets.

[2]

Recorded at fair value.

[3]

Recorded at cost and included in other assets.

[4]

Legally restricted funds excluded $210 million of time deposits (which approximated fair value) at December 31, 2013, associated with the Cerro Verde royalty dispute (refer to Note 12 for further discussion).

[5]

rude oil options are net of $444 million for deferred premiums and accrued interest.

[6]

Included in other liabilities. Refer to Note 2 for further discussion.

[7]

Recorded at cost except for debt assumed in the PXP and FMC acquisitions, which were recorded at fair value at the respective acquisition dates.

[8]

Included $210 million (time deposit that secures a bank guarantee) associated with the Cerro Verde royalty dispute and $158 million for AROs related to properties in New Mexico at December 31, 2013, and $161 million for AROs related to properties in New Mexico at December 31, 2012 (refer to Note 12 for further discussion).

FAIR_VALUE_MEASUREMENT_FAIR_VA

FAIR VALUE MEASUREMENT FAIR VALUE MEASUREMENT (Unobservable inputs) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

Deferred Option Premiums and Accrued Interest [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Crude Oil Options [Member]

Warrant [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Sales [Member]

Interest Expense [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value Assumptions, Implied Volatility Rate

'

'

'

'

'

'

'

'

'

'

'

17.00%

45.00%

23.00%

'

Deferred Premium Price

'

'

'

5.15

7.22

6.33

'

'

'

'

'

'

'

'

'

Derivative Liability

$320

$20

$444

'

'

'

$311

[1]

$0

[1],[2]

$0

'

'

'

'

'

$0

Derivative financial instruments assumed in the PXP acquisition

'

'

'

'

'

'

'

'

-83

'

'

'

'

'

-10

Net realized losses

'

'

'

'

'

'

'

'

-38

[3]

37

1

'

'

'

0

Net unrealized (losses) gains included in earnings related to assets and liabilities still held at the end of the period

'

'

'

'

'

'

'

'

-230

[4]

228

2

'

'

'

8

[5]

Settlement payments

'

'

'

'

'

'

'

'

42

'

'

'

'

'

0

Derivative Liability

$320

$20

$444

'

'

'

$311

[1]

$0

[1],[2]

($309)

'

'

'

'

'

($2)

[1]

Recorded at fair value.

[2]

rude oil options are net of $444 million for deferred premiums and accrued interest.

[3]

Included net realized losses of $37 million recorded in revenues and $1 million of interest expense associated with the deferred premiums for the seven month period from June 1, 2013, to December 31, 2013.

[4]

Included unrealized losses of $228 million recorded in revenues and $2 million of interest expense associated with the deferred premiums.

[5]

Recorded in other (expense) income, net.

BUSINESS_SEGMENTS_Mine_Product

BUSINESS SEGMENTS (Mine Production and Purchase Percentages) (Details)	12 Months Ended
	Dec. 31, 2013
Morenci [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Division's Copper Production	39.00%
Cerro Verde [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Division's Copper Production	42.00%
Candelaria [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Division's Copper Production	28.00%
South America [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Atlantic Copper's annual concentrate requirements purchased from intercompany	32.00%
Indonesia [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Atlantic Copper's annual concentrate requirements purchased from intercompany	16.00%
North America Copper Mines Segment [Member]	'
Mining Segment Reporting Information [Line Items]	'
Percentage of Atlantic Copper's annual concentrate requirements purchased from intercompany	13.00%
PT Smelting [Member]	'
Mining Segment Reporting Information [Line Items]	'
Deferred Intercompany Profit, Percentage	25.00%

BUSINESS_SEGMENTS_Product_Reve

BUSINESS SEGMENTS (Product Revenue) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Product revenue [Line Items]	'		'		'
Revenues	$20,921	[1]	$18,010	[1]	$20,880	[1]
Treatment and refining charges included in copper concentrates revenues	400		311		362
Refined Copper Products [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	7,466		9,699		10,297
Copper in concentrates [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	7,040	[2]	4,589	[2]	5,938	[2]
Gold [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	1,656		1,741		2,429
Molybdenum [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	1,110		1,187		1,348
Oil [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	2,310		0		0
Other [Member]	'		'		'
Product revenue [Line Items]	'		'		'
Revenues	$1,339		$794		$868
[1]	Revenues are attributed to countries based on the location of the customer.
[2]	Amounts are net of treatment and refining charges totaling $400 million for 2013, $311 million for 2012 and $362 million for 2011.

BUSINESS_SEGMENTS_Revenues_by_

BUSINESS SEGMENTS (Revenues by Geographic Area of Customer) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	$20,921	[1]	$18,010	[1]	$20,880	[1]
United States [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	9,418	[1]	6,285	[1]	7,176	[1]
Japan [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	2,141	[1]	2,181	[1]	2,501	[1]
Indonesia [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	1,651	[1]	2,054	[1]	2,266	[1]
Spain [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	1,223	[1]	1,581	[1]	1,643	[1]
Switzerland [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	1,098	[1]	731	[1]	1,219	[1]
China [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	1,078	[1]	579	[1]	942	[1]
Chile [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	754	[1]	704	[1]	741	[1]
Korea [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	297	[1]	525	[1]	561	[1]
Others [Member]	'		'		'
Revenues by geographic area of customer [Line Items]	'		'		'
Revenues	$3,261	[1]	$3,370	[1]	$3,831	[1]
[1]	Revenues are attributed to countries based on the location of the customer.

BUSINESS_SEGMENTS_Long_Lived_A

BUSINESS SEGMENTS (Long Lived Assets by Geographic Area) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2010
In Millions, unless otherwise specified
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	$51,204	[1]	$24,589	[1]	$21,697	[1]
United States [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	32,969	[1],[2]	8,689	[1]	7,899	[1]
Indonesia [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	5,799	[1]	5,127	[1]	4,469	[1]
Democratic Republic of Congo [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	3,994	[1]	3,926	[1]	3,497	[1]
Peru [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	5,181	[1]	3,933	[1]	3,265	[1]
Chile [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	2,699	[1]	2,587	[1]	2,242	[1]
Others [Member]	'		'		'
Long Lived assets by geographic area of customer [Line Items]	'		'		'
Long-Lived Assets	$562	[1]	$327	[1]	$325	[1]
[1]	Long-lived assets exclude deferred tax assets, intangible assets and goodwill.
[2]	Increased primarily because of the PXP and MMR acquisitions.

BUSINESS_SEGMENTS_Revenue_by_M

BUSINESS SEGMENTS (Revenue by Major Customers and Labor Matters) (Details) (USD $)	12 Months Ended
In Billions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Major Customer and Labor Matters [Line Items]	'	'	'
Percentage of Employees Covered by Collective Bargaining Agreements	49.00%	'	'
Percentage of Employees Covered by Collective Bargaining Agreements that Expire within One Year	1.00%	'	'
PT Smelting [Member]	'	'	'
Major Customer and Labor Matters [Line Items]	'	'	'
Revenues to major customers	$1.70	$2.10	$2.30
Percent of revenues to major customers as compared to total consolidated revenues	8.00%	11.00%	11.00%

BUSINESS_SEGMENTS_Segment_Repo

BUSINESS SEGMENTS (Segment Reporting) (Details) (USD $)

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

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit), Changes in Deferred Tax Liabilities and Deferred Tax Asset Valuation Allowances

$16,000,000

'

$183,000,000

'

'

'

'

'

$199,000,000

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

20,921,000,000

[1]

18,010,000,000

[1]

20,880,000,000

[1]

Intersegment

'

'

'

'

'

'

'

'

0

0

0

Production and delivery

'

'

'

'

'

'

'

'

11,840,000,000

10,382,000,000

9,898,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

2,797,000,000

1,179,000,000

1,022,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

657,000,000

431,000,000

415,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

210,000,000

285,000,000

271,000,000

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

66,000,000

-22,000,000

134,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

0

-59,000,000

0

Operating income

1,650,000,000

[2],[3]

1,707,000,000

[2]

639,000,000

[2]

1,355,000,000

[2]

1,358,000,000

[4],[5]

1,411,000,000

1,311,000,000

1,734,000,000

5,351,000,000

[2],[3]

5,814,000,000

[4],[5]

9,140,000,000

Interest expense, net

'

'

'

'

'

'

'

'

518,000,000

186,000,000

312,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

1,475,000,000

1,510,000,000

3,087,000,000

Total assets

63,473,000,000

'

'

'

35,440,000,000

'

'

'

63,473,000,000

35,440,000,000

32,070,000,000

Capital expenditures

'

'

'

'

'

'

'

'

5,286,000,000

3,494,000,000

2,534,000,000

North America Copper Mines Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

570,000,000

202,000,000

594,000,000

Intersegment

'

'

'

'

'

'

'

'

4,613,000,000

5,284,000,000

5,035,000,000

Production and delivery

'

'

'

'

'

'

'

'

3,266,000,000

2,933,000,000

2,565,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

402,000,000

360,000,000

278,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

5,000,000

4,000,000

4,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

5,000,000

1,000,000

7,000,000

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

-1,000,000

-16,000,000

4,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

1,506,000,000

2,204,000,000

2,771,000,000

Interest expense, net

'

'

'

'

'

'

'

'

4,000,000

1,000,000

4,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

8,920,000,000

'

'

'

8,148,000,000

'

'

'

8,920,000,000

8,148,000,000

6,974,000,000

Capital expenditures

'

'

'

'

'

'

'

'

1,066,000,000

825,000,000

494,000,000

Morenci [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

244,000,000

156,000,000

418,000,000

Intersegment

'

'

'

'

'

'

'

'

1,673,000,000

1,846,000,000

1,697,000,000

Production and delivery

'

'

'

'

'

'

'

'

1,233,000,000

1,076,000,000

984,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

133,000,000

122,000,000

116,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

2,000,000

2,000,000

2,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

1,000,000

7,000,000

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

-11,000,000

4,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

549,000,000

812,000,000

1,002,000,000

Interest expense, net

'

'

'

'

'

'

'

'

3,000,000

1,000,000

2,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

3,110,000,000

'

'

'

2,445,000,000

'

'

'

3,110,000,000

2,445,000,000

2,006,000,000

Capital expenditures

'

'

'

'

'

'

'

'

737,000,000

266,000,000

95,000,000

Other North America Copper Mines [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

326,000,000

46,000,000

176,000,000

Intersegment

'

'

'

'

'

'

'

'

2,940,000,000

3,438,000,000

3,338,000,000

Production and delivery

'

'

'

'

'

'

'

'

2,033,000,000

1,857,000,000

1,581,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

269,000,000

238,000,000

162,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

3,000,000

2,000,000

2,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

5,000,000

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

-1,000,000

-5,000,000

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

957,000,000

1,392,000,000

1,769,000,000

Interest expense, net

'

'

'

'

'

'

'

'

1,000,000

0

2,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

5,810,000,000

'

'

'

5,703,000,000

'

'

'

5,810,000,000

5,703,000,000

4,968,000,000

Capital expenditures

'

'

'

'

'

'

'

'

329,000,000

559,000,000

399,000,000

South America [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

3,852,000,000

3,910,000,000

4,572,000,000

Intersegment

'

'

'

'

'

'

'

'

633,000,000

818,000,000

686,000,000

Production and delivery

'

'

'

'

'

'

'

'

2,069,000,000

2,114,000,000

1,905,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

346,000,000

287,000,000

258,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

7,000,000

6,000,000

7,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

2,063,000,000

2,321,000,000

3,088,000,000

Interest expense, net

'

'

'

'

'

'

'

'

3,000,000

7,000,000

1,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

720,000,000

557,000,000

1,075,000,000

Total assets

10,580,000,000

'

'

'

10,163,000,000

'

'

'

10,580,000,000

10,163,000,000

8,714,000,000

Capital expenditures

'

'

'

'

'

'

'

'

1,145,000,000

931,000,000

603,000,000

Cerro Verde [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

1,473,000,000

1,767,000,000

2,115,000,000

Intersegment

'

'

'

'

'

'

'

'

360,000,000

388,000,000

417,000,000

Production and delivery

'

'

'

'

'

'

'

'

781,000,000

813,000,000

827,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

152,000,000

139,000,000

135,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

3,000,000

3,000,000

4,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

897,000,000

1,200,000,000

1,566,000,000

Interest expense, net

'

'

'

'

'

'

'

'

2,000,000

7,000,000

1,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

316,000,000

228,000,000

[6]

553,000,000

Total assets

6,584,000,000

'

'

'

5,821,000,000

'

'

'

6,584,000,000

5,821,000,000

5,110,000,000

Capital expenditures

'

'

'

'

'

'

'

'

960,000,000

558,000,000

198,000,000

Candelaria [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

1,155,000,000

797,000,000

1,265,000,000

Intersegment

'

'

'

'

'

'

'

'

273,000,000

430,000,000

269,000,000

Production and delivery

'

'

'

'

'

'

'

'

700,000,000

702,000,000

644,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

69,000,000

32,000,000

28,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

2,000,000

1,000,000

1,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

657,000,000

492,000,000

861,000,000

Interest expense, net

'

'

'

'

'

'

'

'

0

0

0

Provision for income taxes

'

'

'

'

'

'

'

'

236,000,000

141,000,000

310,000,000

Total assets

1,545,000,000

'

'

'

1,853,000,000

'

'

'

1,545,000,000

1,853,000,000

1,384,000,000

Capital expenditures

'

'

'

'

'

'

'

'

110,000,000

259,000,000

178,000,000

Other South America Mines [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

1,224,000,000

1,346,000,000

1,192,000,000

Intersegment

'

'

'

'

'

'

'

'

0

0

0

Production and delivery

'

'

'

'

'

'

'

'

588,000,000

599,000,000

434,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

125,000,000

116,000,000

95,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

2,000,000

2,000,000

2,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

509,000,000

629,000,000

661,000,000

Interest expense, net

'

'

'

'

'

'

'

'

1,000,000

0

0

Provision for income taxes

'

'

'

'

'

'

'

'

168,000,000

188,000,000

212,000,000

Total assets

2,451,000,000

'

'

'

2,489,000,000

'

'

'

2,451,000,000

2,489,000,000

2,220,000,000

Capital expenditures

'

'

'

'

'

'

'

'

75,000,000

114,000,000

227,000,000

Indonesia - Grasberg [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

3,751,000,000

[7]

3,611,000,000

[7]

4,504,000,000

[8]

Intersegment

'

'

'

'

'

'

'

'

336,000,000

310,000,000

542,000,000

Production and delivery

'

'

'

'

'

'

'

'

2,309,000,000

2,349,000,000

1,791,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

247,000,000

212,000,000

215,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

110,000,000

121,000,000

124,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

1,000,000

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

-59,000,000

'

Operating income

'

'

'

'

'

'

'

'

1,420,000,000

1,298,000,000

2,916,000,000

Interest expense, net

'

'

'

'

'

'

'

'

12,000,000

5,000,000

8,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

603,000,000

497,000,000

1,256,000,000

Total assets

7,437,000,000

'

'

'

6,591,000,000

'

'

'

7,437,000,000

6,591,000,000

5,349,000,000

Capital expenditures

'

'

'

'

'

'

'

'

1,030,000,000

843,000,000

648,000,000

Africa - Tenke [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

1,590,000,000

1,349,000,000

1,282,000,000

Intersegment

'

'

'

'

'

'

'

'

47,000,000

10,000,000

7,000,000

Production and delivery

'

'

'

'

'

'

'

'

754,000,000

615,000,000

591,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

246,000,000

176,000,000

140,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

12,000,000

6,000,000

8,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

625,000,000

562,000,000

550,000,000

Interest expense, net

'

'

'

'

'

'

'

'

2,000,000

1,000,000

6,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

131,000,000

112,000,000

120,000,000

Total assets

4,849,000,000

'

'

'

4,622,000,000

'

'

'

4,849,000,000

4,622,000,000

3,890,000,000

Capital expenditures

'

'

'

'

'

'

'

'

205,000,000

539,000,000

193,000,000

Molybdenum [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

0

0

0

Intersegment

'

'

'

'

'

'

'

'

522,000,000

529,000,000

595,000,000

Production and delivery

'

'

'

'

'

'

'

'

317,000,000

320,000,000

259,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

82,000,000

59,000,000

45,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

0

0

0

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

123,000,000

150,000,000

291,000,000

Interest expense, net

'

'

'

'

'

'

'

'

0

0

0

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

2,107,000,000

'

'

'

2,018,000,000

'

'

'

2,107,000,000

2,018,000,000

1,819,000,000

Capital expenditures

'

'

'

'

'

'

'

'

164,000,000

245,000,000

438,000,000

Rod & Refining [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

4,995,000,000

4,989,000,000

5,523,000,000

Intersegment

'

'

'

'

'

'

'

'

27,000,000

27,000,000

26,000,000

Production and delivery

'

'

'

'

'

'

'

'

4,990,000,000

4,993,000,000

5,527,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

9,000,000

9,000,000

8,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

0

0

0

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

1,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

23,000,000

14,000,000

13,000,000

Interest expense, net

'

'

'

'

'

'

'

'

0

0

0

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

239,000,000

'

'

'

242,000,000

'

'

'

239,000,000

242,000,000

259,000,000

Capital expenditures

'

'

'

'

'

'

'

'

4,000,000

6,000,000

10,000,000

Atlantic Copper Smelting & Refining [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Cost of Goods Sold, Maintenance Costs

'

'

'

'

'

'

'

'

50,000,000

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

2,027,000,000

2,683,000,000

2,969,000,000

Intersegment

'

'

'

'

'

'

'

'

14,000,000

26,000,000

15,000,000

Production and delivery

'

'

'

'

'

'

'

'

2,054,000,000

2,640,000,000

2,991,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

42,000,000

42,000,000

40,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

20,000,000

19,000,000

22,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

-75,000,000

[9]

8,000,000

-69,000,000

Interest expense, net

'

'

'

'

'

'

'

'

16,000,000

12,000,000

15,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

1,039,000,000

'

'

'

992,000,000

'

'

'

1,039,000,000

992,000,000

1,109,000,000

Capital expenditures

'

'

'

'

'

'

'

'

67,000,000

16,000,000

32,000,000

Corporate, Other & Eliminations [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

4,000,000

7,000,000

8,000,000

Intersegment

'

'

'

'

'

'

'

'

0

0

0

Production and delivery

'

'

'

'

'

'

'

'

7,000,000

3,000,000

-3,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

11,000,000

7,000,000

7,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

354,000,000

257,000,000

231,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

11,000,000

12,000,000

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

-3,000,000

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

-379,000,000

-269,000,000

-227,000,000

Interest expense, net

'

'

'

'

'

'

'

'

220,000,000

79,000,000

191,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

21,000,000

[10]

344,000,000

636,000,000

Total assets

1,047,000,000

'

'

'

2,050,000,000

'

'

'

1,047,000,000

2,050,000,000

3,064,000,000

Capital expenditures

'

'

'

'

'

'

'

'

56,000,000

20,000,000

57,000,000

Other Mining and Eliminations Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

1,516,000,000

[11]

1,259,000,000

[11]

1,428,000,000

[11]

Intersegment

'

'

'

'

'

'

'

'

-6,192,000,000

-7,004,000,000

-6,906,000,000

Production and delivery

'

'

'

'

'

'

'

'

-4,608,000,000

-5,585,000,000

-5,728,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

48,000,000

27,000,000

31,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

29,000,000

18,000,000

19,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

193,000,000

272,000,000

264,000,000

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

67,000,000

-3,000,000

129,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

-405,000,000

-474,000,000

-193,000,000

Interest expense, net

'

'

'

'

'

'

'

'

80,000,000

81,000,000

87,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

1,003,000,000

'

'

'

614,000,000

'

'

'

1,003,000,000

614,000,000

892,000,000

Capital expenditures

'

'

'

'

'

'

'

'

113,000,000

69,000,000

59,000,000

Mining Operations [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

18,301,000,000

18,003,000,000

20,872,000,000

Intersegment

'

'

'

'

'

'

'

'

0

0

0

Production and delivery

'

'

'

'

'

'

'

'

11,151,000,000

10,379,000,000

9,901,000,000

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

1,422,000,000

1,172,000,000

1,015,000,000

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

183,000,000

174,000,000

184,000,000

Mining exploration and research expenses

'

'

'

'

'

'

'

'

199,000,000

273,000,000

271,000,000

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

66,000,000

-19,000,000

134,000,000

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

-59,000,000

'

Operating income

'

'

'

'

'

'

'

'

5,280,000,000

6,083,000,000

9,367,000,000

Interest expense, net

'

'

'

'

'

'

'

'

117,000,000

107,000,000

121,000,000

Provision for income taxes

'

'

'

'

'

'

'

'

1,454,000,000

1,166,000,000

2,451,000,000

Total assets

36,174,000,000

'

'

'

33,390,000,000

'

'

'

36,174,000,000

33,390,000,000

29,006,000,000

Capital expenditures

'

'

'

'

'

'

'

'

3,794,000,000

3,474,000,000

2,477,000,000

Oil and Gas Operations Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Unaffiliated customers

'

'

'

'

'

'

'

'

2,616,000,000

[12]

0

0

Intersegment

'

'

'

'

'

'

'

'

0

0

0

Production and delivery

'

'

'

'

'

'

'

'

682,000,000

0

0

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

1,364,000,000

0

0

Selling, general and administrative expenses

'

'

'

'

'

'

'

'

120,000,000

0

0

Mining exploration and research expenses

'

'

'

'

'

'

'

'

0

0

0

Environmental obligations and shutdown costs

'

'

'

'

'

'

'

'

0

0

0

Gain on insurance settlement

'

'

'

'

'

'

'

'

'

0

'

Operating income

'

'

'

'

'

'

'

'

450,000,000

0

0

Interest expense, net

'

'

'

'

'

'

'

'

181,000,000

0

0

Provision for income taxes

'

'

'

'

'

'

'

'

0

0

0

Total assets

26,252,000,000

'

'

'

0

'

'

'

26,252,000,000

0

0

Capital expenditures

'

'

'

'

'

'

'

'

1,436,000,000

0

0

PT Smelting [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Revenues to major customers

'

'

'

'

'

'

'

'

1,700,000,000

2,100,000,000

2,300,000,000

Cerro Verde [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Deferred Foreign Income Tax Expense (Benefit) Associated with Foreign Reinvested Profits

'

'

'

'

'

'

'

'

234,000,000

'

'

Crude Oil and Natural Gas Swaps [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues:

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net

($118,000,000)

($158,000,000)

($36,000,000)

'

'

'

'

'

($312,000,000)

'

'

[1]

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

[2]

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.

[3]

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.

[4]

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.

[5]

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.

[6]

Included a credit of $234 million for the reversal of a net deferred tax liability.

[7]

Included PT-FI's sales to PT Smelting totaling $1.7 billion in 2013 and $2.1 billion in 2012.

[8]

Included PT-FI's sales to PT Smelting totaling $2.3 billion.

[9]

Included $50 million for shutdown costs associated with Atlantic Copper's scheduled 68-day maintenance turnaround, which was completed in fourth-quarter 2013.

[10]

Included $199 million of net benefits resulting from oil and gas acquisitions.

[11]

Included revenues from FCX's molybdenum sales company, which included sales of molybdenum produced by the molybdenum mines and by certain of the North and South America copper mines.

[12]

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.

GUARANTOR_FINANCIAL_STATEMENTS2

GUARANTOR FINANCIAL STATEMENTS (Details) (USD $)	Dec. 31, 2013	Mar. 07, 2013
In Millions, unless otherwise specified	FM O&G LLC Guarantor [Member]	Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]	'	'
Debt Instrument, Face Amount	'	$6,500
Ownership percentage of subsidiary	100.00%	'

GUARANTOR_FINANCIAL_STATEMENTS3

GUARANTOR FINANCIAL STATEMENTS (Condensed Consolidating Balance Sheet) (Details) (USD $)	Dec. 31, 2013		Jun. 03, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current assets:	'		'	'	'	'	'
Cash and cash equivalents	$1,985,000,000		'	$3,705,000,000	'	$4,822,000,000	$3,738,000,000
Accounts receivables	2,562,000,000		'	'	'	'	'
Inventories	5,018,000,000		'	'	'	'	'
Other current assets	407,000,000		'	387,000,000	'	'	'
Total current assets	9,972,000,000		'	10,297,000,000	'	'	'
Property, plant, equipment and mining development costs, net	24,042,000,000		'	20,999,000,000	'	'	'
Subject to amortization	12,472,000,000		'	0	'	'	'
Not subject to amortization	10,887,000,000		'	0	'	'	'
Investment in consolidated subsidiaries	0		'	'	'	'	'
Goodwill	1,916,000,000	[1]	'	0	'	'	'
Other Assets	4,184,000,000		'	'	'	'	'
Total assets	63,473,000,000		'	35,440,000,000	32,070,000,000	'	'
LIABILITIES AND EQUITY	'		'	'	'	'	'
Current liabilities	4,773,000,000		'	3,343,000,000	'	'	'
Long-term debt, less current portion	20,394,000,000		'	3,525,000,000	'	'	'
Deferred income taxes	7,410,000,000		'	3,490,000,000	'	'	'
Environmental and asset retirement obligations, less current portion	3,259,000,000		'	2,127,000,000	'	'	'
Other liabilities	1,690,000,000		'	1,644,000,000	'	'	'
Total liabilities	37,526,000,000		'	14,129,000,000	'	'	'
Redeemable noncontrolling interest	716,000,000		259,000,000	0	'	'	'
Equity:	'		'	'	'	'	'
Stockholders' equity	20,934,000,000		'	17,543,000,000	'	'	'
Noncontrolling interests	4,297,000,000		'	3,768,000,000	'	'	'
Total equity	25,231,000,000		'	21,311,000,000	18,553,000,000	14,560,000,000	'
Total liabilities and equity	63,473,000,000		'	35,440,000,000	'	'	'
FCX Issuer [Member]	'		'	'	'	'	'
Current assets:	'		'	'	'	'	'
Cash and cash equivalents	0		'	0	'	'	'
Accounts receivables	855,000,000		'	'	'	'	'
Inventories	0		'	'	'	'	'
Other current assets	114,000,000		'	'	'	'	'
Total current assets	969,000,000		'	'	'	'	'
Property, plant, equipment and mining development costs, net	27,000,000		'	'	'	'	'
Subject to amortization	0		'	'	'	'	'
Not subject to amortization	0		'	'	'	'	'
Investment in consolidated subsidiaries	31,162,000,000		'	'	'	'	'
Goodwill	0		'	'	'	'	'
Other Assets	7,126,000,000		'	'	'	'	'
Total assets	39,284,000,000		'	'	'	'	'
LIABILITIES AND EQUITY	'		'	'	'	'	'
Current liabilities	1,003,000,000		'	'	'	'	'
Long-term debt, less current portion	13,184,000,000		'	'	'	'	'
Deferred income taxes	4,137,000,000	[2]	'	'	'	'	'
Environmental and asset retirement obligations, less current portion	0		'	'	'	'	'
Other liabilities	26,000,000		'	'	'	'	'
Total liabilities	18,350,000,000		'	'	'	'	'
Redeemable noncontrolling interest	0		'	'	'	'	'
Equity:	'		'	'	'	'	'
Stockholders' equity	20,934,000,000		'	'	'	'	'
Noncontrolling interests	0		'	'	'	'	'
Total equity	20,934,000,000		'	'	'	'	'
Total liabilities and equity	39,284,000,000		'	'	'	'	'
FM O&G LLC Guarantor [Member]	'		'	'	'	'	'
Current assets:	'		'	'	'	'	'
Cash and cash equivalents	0		'	0	'	'	'
Accounts receivables	659,000,000		'	'	'	'	'
Inventories	18,000,000		'	'	'	'	'
Other current assets	20,000,000		'	'	'	'	'
Total current assets	697,000,000		'	'	'	'	'
Property, plant, equipment and mining development costs, net	43,000,000		'	'	'	'	'
Subject to amortization	6,207,000,000		'	'	'	'	'
Not subject to amortization	2,649,000,000		'	'	'	'	'
Investment in consolidated subsidiaries	9,712,000,000		'	'	'	'	'
Goodwill	437,000,000		'	'	'	'	'
Other Assets	4,640,000,000		'	'	'	'	'
Total assets	24,385,000,000		'	'	'	'	'
LIABILITIES AND EQUITY	'		'	'	'	'	'
Current liabilities	758,000,000		'	'	'	'	'
Long-term debt, less current portion	7,199,000,000		'	'	'	'	'
Deferred income taxes	0		'	'	'	'	'
Environmental and asset retirement obligations, less current portion	301,000,000		'	'	'	'	'
Other liabilities	3,436,000,000		'	'	'	'	'
Total liabilities	11,694,000,000		'	'	'	'	'
Redeemable noncontrolling interest	0		'	'	'	'	'
Equity:	'		'	'	'	'	'
Stockholders' equity	12,691,000,000		'	'	'	'	'
Noncontrolling interests	0		'	'	'	'	'
Total equity	12,691,000,000		'	'	'	'	'
Total liabilities and equity	24,385,000,000		'	'	'	'	'
Non-Guarantor Subsidiaries [Member]	'		'	'	'	'	'
Current assets:	'		'	'	'	'	'
Cash and cash equivalents	1,985,000,000		'	3,705,000,000	'	'	'
Accounts receivables	2,258,000,000		'	'	'	'	'
Inventories	5,000,000,000		'	'	'	'	'
Other current assets	273,000,000		'	'	'	'	'
Total current assets	9,516,000,000		'	'	'	'	'
Property, plant, equipment and mining development costs, net	23,972,000,000		'	'	'	'	'
Subject to amortization	6,265,000,000		'	'	'	'	'
Not subject to amortization	8,238,000,000		'	'	'	'	'
Investment in consolidated subsidiaries	12,468,000,000		'	'	'	'	'
Goodwill	1,479,000,000		'	'	'	'	'
Other Assets	4,128,000,000		'	'	'	'	'
Total assets	66,066,000,000		'	'	'	'	'
LIABILITIES AND EQUITY	'		'	'	'	'	'
Current liabilities	4,222,000,000		'	'	'	'	'
Long-term debt, less current portion	8,056,000,000		'	'	'	'	'
Deferred income taxes	3,273,000,000		'	'	'	'	'
Environmental and asset retirement obligations, less current portion	2,958,000,000		'	'	'	'	'
Other liabilities	1,893,000,000		'	'	'	'	'
Total liabilities	20,402,000,000		'	'	'	'	'
Redeemable noncontrolling interest	716,000,000		'	'	'	'	'
Equity:	'		'	'	'	'	'
Stockholders' equity	41,100,000,000		'	'	'	'	'
Noncontrolling interests	3,848,000,000		'	'	'	'	'
Total equity	44,948,000,000		'	'	'	'	'
Total liabilities and equity	66,066,000,000		'	'	'	'	'
Eliminations [Member]	'		'	'	'	'	'
Current assets:	'		'	'	'	'	'
Cash and cash equivalents	0		'	0	'	'	'
Accounts receivables	-1,210,000,000		'	'	'	'	'
Inventories	0		'	'	'	'	'
Other current assets	0		'	'	'	'	'
Total current assets	-1,210,000,000		'	'	'	'	'
Property, plant, equipment and mining development costs, net	0		'	'	'	'	'
Subject to amortization	0		'	'	'	'	'
Not subject to amortization	0		'	'	'	'	'
Investment in consolidated subsidiaries	-53,342,000,000		'	'	'	'	'
Goodwill	0		'	'	'	'	'
Other Assets	-11,710,000,000		'	'	'	'	'
Total assets	-66,262,000,000		'	'	'	'	'
LIABILITIES AND EQUITY	'		'	'	'	'	'
Current liabilities	-1,210,000,000		'	'	'	'	'
Long-term debt, less current portion	-8,045,000,000		'	'	'	'	'
Deferred income taxes	0		'	'	'	'	'
Environmental and asset retirement obligations, less current portion	0		'	'	'	'	'
Other liabilities	-3,665,000,000		'	'	'	'	'
Total liabilities	-12,920,000,000		'	'	'	'	'
Redeemable noncontrolling interest	0		'	'	'	'	'
Equity:	'		'	'	'	'	'
Stockholders' equity	-53,791,000,000		'	'	'	'	'
Noncontrolling interests	449,000,000		'	'	'	'	'
Total equity	-53,342,000,000		'	'	'	'	'
Total liabilities and equity	($66,262,000,000)		'	'	'	'	'
[1]	During the fourth quarter of 2013, FCX conducted a qualitative goodwill impairment assessment by examining relevant events and circumstances that could have a negative impact on FCX's goodwill, such as macroeconomic conditions, industry and market conditions, cost factors that have a negative effect on earnings and cash flows, overall financial performance, dispositions and acquisitions, and any other relevant events or circumstances. After assessing the relevant events and circumstances for the qualitative impairment assessment, FCX determined that performing a quantitative goodwill impairment test was unnecessary, and no goodwill impairment was recognized.
[2]	All U.S. related deferred income taxes are recorded at the parent company.

GUARANTOR_FINANCIAL_STATEMENTS4

GUARANTOR FINANCIAL STATEMENTS (Condensed Consolidating Comprehensive Income Statement) (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, unless otherwise specified

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

Condensed Comprehensive Income Statements [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

$20,921

[1]

$18,010

[1]

$20,880

[1]

Cost of Goods Sold

'

'

'

'

'

'

'

'

14,637

11,561

10,920

Other operating costs and expenses

'

'

'

'

'

'

'

'

933

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

15,570

12,196

11,740

Operating income

1,650

[2],[3]

1,707

[2]

639

[2]

1,355

[2]

1,358

[4],[5]

1,411

1,311

1,734

5,351

[2],[3]

5,814

[4],[5]

9,140

Interest expense, net

'

'

'

'

'

'

'

'

-518

-186

-312

Losses on early extinguishment of debt

'

'

'

'

'

'

'

'

-35

-168

-68

Gain on investment in McMoRan Exploration Co. (MMR)

'

'

'

'

'

'

'

'

128

0

0

Other income (expense), net

'

'

'

'

'

'

'

'

-13

'

'

Income before income taxes and equity in affiliated companies' net earnings

'

'

'

'

'

'

'

'

4,913

5,487

8,818

Benefit from (provision for) income taxes

'

'

'

'

'

'

'

'

-1,475

-1,510

-3,087

Equity in affiliated companies’ net earnings (losses)

'

'

'

'

'

'

'

'

3

3

16

Net income

959

[6]

1,048

610

[6]

824

945

1,140

[7]

894

1,001

3,441

[6]

3,980

[7]

5,747

Net income and preferred dividends attributable to noncontrolling interests

'

'

'

'

'

'

'

'

-783

-939

-1,187

Net income attributable to FCX common stockholders

707

[2],[3],[6],[8],[9]

821

[2],[8]

482

[10],[2],[6],[8],[9]

648

[2],[9]

743

[4],[5]

824

[7]

710

764

[11]

2,658

[10],[2],[3],[6],[8],[9]

3,041

[11],[4],[5],[7]

4,560

Other comprehensive income

'

'

'

'

'

'

'

'

101

'

'

Total comprehensive income (loss)

'

'

'

'

'

'

'

'

2,759

3,000

4,418

FCX Issuer [Member]

'

'

'

'

'

'

'

'

'

'

'

Condensed Comprehensive Income Statements [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

0

'

'

Cost of Goods Sold

'

'

'

'

'

'

'

'

5

'

'

Other operating costs and expenses

'

'

'

'

'

'

'

'

129

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

134

'

'

Operating income

'

'

'

'

'

'

'

'

-134

'

'

Interest expense, net

'

'

'

'

'

'

'

'

-319

'

'

Losses on early extinguishment of debt

'

'

'

'

'

'

'

'

-45

'

'

Gain on investment in McMoRan Exploration Co. (MMR)

'

'

'

'

'

'

'

'

128

'

'

Other income (expense), net

'

'

'

'

'

'

'

'

61

'

'

Income before income taxes and equity in affiliated companies' net earnings

'

'

'

'

'

'

'

'

-309

'

'

Benefit from (provision for) income taxes

'

'

'

'

'

'

'

'

81

'

'

Equity in affiliated companies’ net earnings (losses)

'

'

'

'

'

'

'

'

2,886

'

'

Net income

'

'

'

'

'

'

'

'

2,658

'

'

Net income and preferred dividends attributable to noncontrolling interests

'

'

'

'

'

'

'

'

0

'

'

Net income attributable to FCX common stockholders

'

'

'

'

'

'

'

'

2,658

'

'

Other comprehensive income

'

'

'

'

'

'

'

'

0

'

'

Total comprehensive income (loss)

'

'

'

'

'

'

'

'

2,658

'

'

FM O&G LLC Guarantor [Member]

'

'

'

'

'

'

'

'

'

'

'

Condensed Comprehensive Income Statements [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

1,177

'

'

Cost of Goods Sold

'

'

'

'

'

'

'

'

976

'

'

Other operating costs and expenses

'

'

'

'

'

'

'

'

89

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

1,065

'

'

Operating income

'

'

'

'

'

'

'

'

112

'

'

Interest expense, net

'

'

'

'

'

'

'

'

-129

'

'

Losses on early extinguishment of debt

'

'

'

'

'

'

'

'

0

'

'

Gain on investment in McMoRan Exploration Co. (MMR)

'

'

'

'

'

'

'

'

0

'

'

Other income (expense), net

'

'

'

'

'

'

'

'

0

'

'

Income before income taxes and equity in affiliated companies' net earnings

'

'

'

'

'

'

'

'

-17

'

'

Benefit from (provision for) income taxes

'

'

'

'

'

'

'

'

17

'

'

Equity in affiliated companies’ net earnings (losses)

'

'

'

'

'

'

'

'

281

'

'

Net income

'

'

'

'

'

'

'

'

281

'

'

Net income and preferred dividends attributable to noncontrolling interests

'

'

'

'

'

'

'

'

0

'

'

Net income attributable to FCX common stockholders

'

'

'

'

'

'

'

'

281

'

'

Other comprehensive income

'

'

'

'

'

'

'

'

0

'

'

Total comprehensive income (loss)

'

'

'

'

'

'

'

'

281

'

'

Non-Guarantor Subsidiaries [Member]

'

'

'

'

'

'

'

'

'

'

'

Condensed Comprehensive Income Statements [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

19,744

'

'

Cost of Goods Sold

'

'

'

'

'

'

'

'

13,656

'

'

Other operating costs and expenses

'

'

'

'

'

'

'

'

715

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

14,371

'

'

Operating income

'

'

'

'

'

'

'

'

5,373

'

'

Interest expense, net

'

'

'

'

'

'

'

'

-129

'

'

Losses on early extinguishment of debt

'

'

'

'

'

'

'

'

10

'

'

Gain on investment in McMoRan Exploration Co. (MMR)

'

'

'

'

'

'

'

'

0

'

'

Other income (expense), net

'

'

'

'

'

'

'

'

-15

'

'

Income before income taxes and equity in affiliated companies' net earnings

'

'

'

'

'

'

'

'

5,239

'

'

Benefit from (provision for) income taxes

'

'

'

'

'

'

'

'

-1,573

'

'

Equity in affiliated companies’ net earnings (losses)

'

'

'

'

'

'

'

'

268

'

'

Net income

'

'

'

'

'

'

'

'

3,934

'

'

Net income and preferred dividends attributable to noncontrolling interests

'

'

'

'

'

'

'

'

-706

'

'

Net income attributable to FCX common stockholders

'

'

'

'

'

'

'

'

3,228

'

'

Other comprehensive income

'

'

'

'

'

'

'

'

101

'

'

Total comprehensive income (loss)

'

'

'

'

'

'

'

'

3,329

'

'

Eliminations [Member]

'

'

'

'

'

'

'

'

'

'

'

Condensed Comprehensive Income Statements [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

0

'

'

Cost of Goods Sold

'

'

'

'

'

'

'

'

0

'

'

Other operating costs and expenses

'

'

'

'

'

'

'

'

0

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

0

'

'

Operating income

'

'

'

'

'

'

'

'

0

'

'

Interest expense, net

'

'

'

'

'

'

'

'

59

'

'

Losses on early extinguishment of debt

'

'

'

'

'

'

'

'

0

'

'

Gain on investment in McMoRan Exploration Co. (MMR)

'

'

'

'

'

'

'

'

0

'

'

Other income (expense), net

'

'

'

'

'

'

'

'

-59

'

'

Income before income taxes and equity in affiliated companies' net earnings

'

'

'

'

'

'

'

'

0

'

'

Benefit from (provision for) income taxes

'

'

'

'

'

'

'

'

0

'

'

Equity in affiliated companies’ net earnings (losses)

'

'

'

'

'

'

'

'

-3,432

'

'

Net income

'

'

'

'

'

'

'

'

-3,432

'

'

Net income and preferred dividends attributable to noncontrolling interests

'

'

'

'

'

'

'

'

-77

'

'

Net income attributable to FCX common stockholders

'

'

'

'

'

'

'

'

-3,509

'

'

Other comprehensive income

'

'

'

'

'

'

'

'

0

'

'

Total comprehensive income (loss)

'

'

'

'

'

'

'

'

($3,509)

'

'

[1]

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

[2]

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.

[3]

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.

[4]

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.

[5]

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.

[6]

Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.

[7]

Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.

[8]

Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.

[9]

Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.

[10]

Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.

[11]

Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

GUARANTOR_FINANCIAL_STATEMENTS5

GUARANTOR FINANCIAL STATEMENTS (Condensed Consolidated Cash Flow Statement) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Cash flow from operating activities:	'		'		'
Net income	$3,441	[1]	$3,980	[2]	$5,747
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	2,797		1,179		1,022
Net losses on crude oil and natural gas derivative contracts	334		0		0
Gain on investment in McMoRan Exploration Co. (MMR)	-128		0		0
Equity in Earnings of consolidated Subsidiaries	0		'		'
Other, net	72		'		'
Increase (decrease) in working capital and changes in other tax payment, excluding amounts from the acquisitions	-377		'		'
Net cash provided by operating activities	6,139		3,774		6,620
Cash flow from investing activities:	'		'		'
Capital expenditures	-5,286		-3,494		-2,534
Acquisitions, net of cash acquired	-5,441		'		'
Intercompany loans	0		'		'
Distributions from consolidated subsidiary	0		'		'
Other, net	-181		31		-1
Net cash used in investing activities	-10,908		-3,463		-2,535
Cash flow from financing activities:	'		'		'
Proceeds from Debt	11,501		3,029		48
Repayments of Debt and redemption of MMR preferred stock	-5,704		'		'
Intercompany loans	0		'		'
Cash dividends and distributions paid	-2,537		'		'
Other, net	-211		'		'
Net cash provided by (used in) financing activities	3,049		-1,428		-3,001
Net decrease in cash and cash equivalents	-1,720		-1,117		1,084
Cash and cash equivalents at beginning of year	3,705		'		4,822
Cash and cash equivalents at end of year	1,985		3,705		'
FCX Issuer [Member]	'		'		'
Cash flow from operating activities:	'		'		'
Net income	2,658		'		'
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	4		'		'
Net losses on crude oil and natural gas derivative contracts	0		'		'
Gain on investment in McMoRan Exploration Co. (MMR)	-128		'		'
Equity in Earnings of consolidated Subsidiaries	-2,886		'		'
Other, net	8		'		'
Increase (decrease) in working capital and changes in other tax payment, excluding amounts from the acquisitions	272		'		'
Net cash provided by operating activities	-72		'		'
Cash flow from investing activities:	'		'		'
Capital expenditures	0		'		'
Acquisitions, net of cash acquired	-5,437		'		'
Intercompany loans	834		'		'
Distributions from consolidated subsidiary	629		'		'
Other, net	15		'		'
Net cash used in investing activities	-3,959		'		'
Cash flow from financing activities:	'		'		'
Proceeds from Debt	11,260		'		'
Repayments of Debt and redemption of MMR preferred stock	-4,737		'		'
Intercompany loans	0		'		'
Cash dividends and distributions paid	-2,281		'		'
Other, net	-211		'		'
Net cash provided by (used in) financing activities	4,031		'		'
Net decrease in cash and cash equivalents	0		'		'
Cash and cash equivalents at beginning of year	0		'		'
Cash and cash equivalents at end of year	0		'		'
FM O&G LLC Guarantor [Member]	'		'		'
Cash flow from operating activities:	'		'		'
Net income	281		'		'
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	616		'		'
Net losses on crude oil and natural gas derivative contracts	334		'		'
Gain on investment in McMoRan Exploration Co. (MMR)	0		'		'
Equity in Earnings of consolidated Subsidiaries	-281		'		'
Other, net	-14		'		'
Increase (decrease) in working capital and changes in other tax payment, excluding amounts from the acquisitions	735		'		'
Net cash provided by operating activities	1,671		'		'
Cash flow from investing activities:	'		'		'
Capital expenditures	-894		'		'
Acquisitions, net of cash acquired	0		'		'
Intercompany loans	0		'		'
Distributions from consolidated subsidiary	0		'		'
Other, net	30		'		'
Net cash used in investing activities	-864		'		'
Cash flow from financing activities:	'		'		'
Proceeds from Debt	0		'		'
Repayments of Debt and redemption of MMR preferred stock	-416		'		'
Intercompany loans	-391		'		'
Cash dividends and distributions paid	0		'		'
Other, net	0		'		'
Net cash provided by (used in) financing activities	-807		'		'
Net decrease in cash and cash equivalents	0		'		'
Cash and cash equivalents at beginning of year	0		'		'
Cash and cash equivalents at end of year	0		'		'
Non-Guarantor Subsidiaries [Member]	'		'		'
Cash flow from operating activities:	'		'		'
Net income	3,934		'		'
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	2,177		'		'
Net losses on crude oil and natural gas derivative contracts	0		'		'
Gain on investment in McMoRan Exploration Co. (MMR)	0		'		'
Equity in Earnings of consolidated Subsidiaries	-265		'		'
Other, net	78		'		'
Increase (decrease) in working capital and changes in other tax payment, excluding amounts from the acquisitions	-1,384		'		'
Net cash provided by operating activities	4,540		'		'
Cash flow from investing activities:	'		'		'
Capital expenditures	-4,392		'		'
Acquisitions, net of cash acquired	-4		'		'
Intercompany loans	-162		'		'
Distributions from consolidated subsidiary	0		'		'
Other, net	-226		'		'
Net cash used in investing activities	-4,784		'		'
Cash flow from financing activities:	'		'		'
Proceeds from Debt	241		'		'
Repayments of Debt and redemption of MMR preferred stock	-551		'		'
Intercompany loans	-281		'		'
Cash dividends and distributions paid	-885		'		'
Other, net	0		'		'
Net cash provided by (used in) financing activities	-1,476		'		'
Net decrease in cash and cash equivalents	-1,720		'		'
Cash and cash equivalents at beginning of year	3,705		'		'
Cash and cash equivalents at end of year	1,985		'		'
Eliminations [Member]	'		'		'
Cash flow from operating activities:	'		'		'
Net income	-3,432		'		'
Adjustments to reconcile net income to net cash provided by operating activities:	'		'		'
Depreciation, depletion and amortization	0		'		'
Net losses on crude oil and natural gas derivative contracts	0		'		'
Gain on investment in McMoRan Exploration Co. (MMR)	0		'		'
Equity in Earnings of consolidated Subsidiaries	3,432		'		'
Other, net	0		'		'
Increase (decrease) in working capital and changes in other tax payment, excluding amounts from the acquisitions	0		'		'
Net cash provided by operating activities	0		'		'
Cash flow from investing activities:	'		'		'
Capital expenditures	0		'		'
Acquisitions, net of cash acquired	0		'		'
Intercompany loans	-672		'		'
Distributions from consolidated subsidiary	-629		'		'
Other, net	0		'		'
Net cash used in investing activities	-1,301		'		'
Cash flow from financing activities:	'		'		'
Proceeds from Debt	0		'		'
Repayments of Debt and redemption of MMR preferred stock	0		'		'
Intercompany loans	672		'		'
Cash dividends and distributions paid	629		'		'
Other, net	0		'		'
Net cash provided by (used in) financing activities	1,301		'		'
Net decrease in cash and cash equivalents	0		'		'
Cash and cash equivalents at beginning of year	0		'		'
Cash and cash equivalents at end of year	$0		'		'
[1]	Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
[2]	Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.

QUARTERLY_FINANCIAL_INFORMATIO2

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

In Millions, except Per Share data, unless otherwise specified

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, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

PT Freeport Indonesia [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Cerro Verde [Member]

Candelaria [Member]

Candelaria [Member]

Crude Oil and Natural Gas Swaps [Member]

Crude Oil and Natural Gas Swaps [Member]

Crude Oil and Natural Gas Swaps [Member]

Crude Oil and Natural Gas Swaps [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

McMoRan Exploration Co [Member]

Schedule of Quarterly Financial Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

$5,885

[1]

$6,165

[1]

$4,288

[1]

$4,583

$4,513

$4,417

$4,475

$4,605

$20,921

[1]

$18,010

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating income

1,650

[2],[3]

1,707

[2]

639

[2]

1,355

[2]

1,358

[4],[5]

1,411

1,311

1,734

5,351

[2],[3]

5,814

[4],[5]

9,140

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

959

[6]

1,048

610

[6]

824

945

1,140

[7]

894

1,001

3,441

[6]

3,980

[7]

5,747

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income attributable to noncontrolling interests

252

227

128

176

202

316

[7]

184

237

783

939

[7]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income attributable to FCX common stockholders

707

[1],[2],[3],[6],[8]

821

[1],[2]

482

[1],[2],[6],[8],[9]

648

[2],[8]

743

[4],[5]

824

[7]

710

764

[10]

2,658

[1],[2],[3],[6],[8],[9]

3,041

[10],[4],[5],[7]

4,560

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic net income per share attributable to FCX common stockholders (in dollars per share)

$0.68

$0.79

$0.49

$0.68

$0.78

$0.87

$0.75

$0.81

$2.65

$3.20

$4.81

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Diluted net income per share attributable to FCX common stockholders (in dollars per share)

$0.68

[1],[2],[3],[6],[8]

$0.79

[1],[2]

$0.49

[1],[2],[6],[8],[9]

$0.68

[2],[8]

$0.78

[4],[5]

$0.86

[7]

$0.74

$0.80

[10]

$2.64

[1],[2],[3],[6],[8],[9]

$3.19

[10],[4],[5],[7]

$4.78

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

118

158

36

312

'

'

'

Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Portion Attributable to Parent

73

98

23

'

'

'

'

'

194

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Amount Per Share

$0.07

$0.09

$0.02

'

'

'

'

'

$0.19

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Acquisition Related Costs

4

1

61

14

9

'

'

'

80

9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Acquisition Related Costs, Net of Tax

3

1

36

10

7

'

'

'

50

7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Acquisition Related Costs, Net of Tax, Amount Per Share

'

'

$0.04

$0.01

$0.01

'

'

'

$0.05

$0.01

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory Write-down

76

'

'

'

'

'

'

'

76

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory Write-down, Effect on Net Income

49

'

'

'

'

'

'

'

49

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory Write-down, Amount Per Share

$0.05

'

'

'

'

'

'

'

$0.05

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Executive Employment Agreement Costs

37

'

'

'

'

'

'

'

37

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Executive Employment Agreement Costs, Net of Tax

23

'

'

'

'

'

'

'

23

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Executive Employment Agreement Costs, Amount Per Share

$0.02

'

'

'

'

'

'

'

$0.02

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Charges For New Labor Agreements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36

'

36

'

16

16

'

'

'

'

'

'

'

Charges For New Labor Agreements Effect On Net Income

'

'

'

'

'

'

'

'

'

'

'

'

'

'

13

'

13

'

8

8

'

'

'

'

'

'

'

Charges For New Labor Agreements Effect on Diluted Earnings Per Share (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.01

'

$0.01

'

$0.01

$0.01

'

'

'

'

'

'

'

Extinguishment of Debt, Gain (Loss), Net of Tax

-7

'

-5

40

'

'

'

149

28

149

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Extinguishment of Debt, Gain (Loss), Per Share, Net of Tax

($0.01)

'

($0.01)

$0.04

'

'

'

$0.16

$0.03

$0.16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit), Changes in Deferred Tax Liabilities and Deferred Tax Asset Valuation Allowances

16

'

183

'

'

'

'

'

199

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit), Changes in Deferred Tax Liabilities and Deferred Tax Asset Valuation Allowances, Amount Per Share

$0.01

'

$0.19

'

'

'

'

'

$0.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain

'

'

'

'

'

'

'

'

128

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

128

128

128

Business Combination, Step Acquisition, Equity Interest In Acquiree Remeasurement Gain, Amount Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.13

$0.13

Gain on insurance settlement

'

'

'

'

'

'

'

'

0

59

0

59

59

59

'

'

'

'

'

'

'

'

'

'

'

'

'

Insurance Recoveries, Impact on Net Income Attributable to Common Stockholders

'

'

'

'

'

'

'

'

'

'

'

31

'

31

'

'

'

'

'

'

'

'

'

'

'

'

'

Insurance Recoveries, Impact on Net Income Attributable to Common Stockholders, Per Share

'

'

'

'

'

'

'

'

'

'

'

$0.03

'

$0.03

'

'

'

'

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit) Associated with Changes in Foreign Tax Rates and Certain Tax Elections

'

'

'

'

'

'

'

'

-199

[11]

-205

[12],[13]

53

[14]

'

'

'

'

208

[12],[13]

'

205

[12],[13]

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit) Associated with Changes in Foreign Tax Rates and Certain Tax Elections, Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

108

'

107

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit) Associated with Changes in Foreign Tax Rates and Certain Tax Elections, Net of Noncontrolling Interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$100

'

$98

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit) Associated with Changes in Foreign Tax Rates and Certain Tax Elections, Net of Noncontrolling Interest, Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.11

'

$0.11

'

'

'

'

'

'

'

'

'

[1]

Included charges of $36 million ($23 million to net income attributable to FCX common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to FCX common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to FCX common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to FCX common stockholders or $0.19 per share) for the year 2013 (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for net unrealized and noncash realized losses on crude oil and natural gas derivative contracts.

[2]

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.

[3]

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.

[4]

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.

[5]

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.

[6]

Included a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.

[7]

Included a net tax benefit of $208 million ($108 million attributable to noncontrolling interests and $100 million to net income attributable to FCX common stockholders or $0.11 per share) in the third quarter and $205 million ($107 million attributable to noncontrolling interests and $98 million to net income attributable to FCX common stockholders or $0.11 per share) for the year associated with adjustments to Cerro Verde's deferred income taxes. Refer to Note 11 for further discussion.

[8]

Included net losses (gains) on early extinguishment of debt totaling $40 million ($0.04 per share) in the first quarter, $(5) million ($(0.01) per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $(7) million ($(0.01) per share) in the fourth quarter and $28 million ($0.03 per share) for the year. Refer to Note 8 for further discussion.

[9]

Included a gain of $128 million ($0.13 per share) in the second quarter and for the year primarily related to FCX's preferred stock investment in and the subsequent acquisition of MMR.

[10]

Included losses on early extinguishment of debt totaling $149 million ($0.16 per share) in the first quarter and for the year. Refer to Note 8 for further discussion.

[11]

As a result of the oil and gas acquisitions, FCX recognized a net tax benefit of $199 million consisting of income tax benefits of $190 million associated with net reductions in FCX's valuation allowances, $69 million related to the release of the deferred tax liability on PXP's investment in MMR common stock and $16 million associated with the revaluation of state deferred tax liabilities, partially offset by income tax expense of $76 million associated with the write off of deferred tax assets related to environmental liabilities.

[12]

With the exception of TFM, FCX has not elected to permanently reinvest earnings from its foreign subsidiaries and has recorded deferred tax liabilities for foreign earnings that are available to be repatriated to the U.S. Cerro Verde previously recorded deferred Peruvian income tax liabilities for income taxes that would become payable if the reinvested profits used to fund the initial Cerro Verde sulfide expansion were distributed prior to the expiration of Cerro Verde's 1998 stability agreement on December 31, 2013. Because reinvested profits at Cerro Verde were not expected to be distributed prior to December 31, 2013, a net deferred income tax liability of $234 million was reversed and recognized as an income tax benefit in 2012.

[13]

In 2012, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde) signed a new 15-year mining stability agreement with the Peruvian government, which became effective January 1, 2014. In connection with the new mining stability agreement, Cerro Verde's income tax rate increased from 30 percent to 32 percent, and FCX recognized additional deferred tax expense of $29 million.

[14]

In September 2011, Peru enacted a new mining tax and royalty regime and also created a special mining burden that companies with stability agreements could elect to pay. Cerro Verde elected to pay this special mining burden during the remaining term of its 1998 stability agreement, which expired on December 31, 2013. As a result, Cerro Verde recognized additional tax expense of $53 million

SUPPLEMENTARY_MINERAL_RESERVE_2

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Details)	Dec. 31, 2013
	lb
Supplementary Mineral Reserve Information [Abstract]	'
Long-term average price for copper used to estimate recoverable reserves (in dollars per pound)	2
Long-term average price for gold used to estimate recoverable reserves (in dollars per ounce)	1,000
Long-term average price for molybdenum used to estimate recoverable reserves (in dollars per pound)	10
Long-term average price for silver used to estimate recoverable reserves (in dollars per ounce)	15
Long-term average price for cobalt used to estimate recoverable reserves (in dollars per pound)	10
Three-year average London spot price for copper (per pound)	3.64
Three-year average London spot price for gold (per ounce)	1,550
Three-year average price for molybdenum (per pound)	12.85
Estimated recoverable proven and probable copper reserves in leach stockpiles (in pounds)	3,300,000,000
Estimated recoverable proven and probable copper reserves in mill stockpiles (in pounds)	1,400,000,000

SUPPLEMENTARY_MINERAL_RESERVE_3

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details)	Dec. 31, 2013
	lb
Copper (pounds) [Member] | North America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	36,200,000,000	[1]
Copper (pounds) [Member] | South America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	37,000,000,000	[1]
Copper (pounds) [Member] | Indonesia [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	30,000,000,000	[1]
Copper (pounds) [Member] | Africa [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	8,000,000,000	[1]
Gold (ounces) [Member] | North America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	400,000
Gold (ounces) [Member] | South America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	1,100,000
Gold (ounces) [Member] | Indonesia [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	29,800,000
Gold (ounces) [Member] | Africa [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	0
Molybdenum (pounds) [Member] | North America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	2,550,000,000
Molybdenum (pounds) [Member] | South America [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	710,000,000
Molybdenum (pounds) [Member] | Indonesia [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Africa [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	0
Consolidated Basis [Member] | Copper (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	111,200,000,000	[2],[3]
Consolidated Basis [Member] | Gold (ounces) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	31,300,000	[2],[3]
Consolidated Basis [Member] | Molybdenum (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	3,260,000,000	[2],[3]
Consolidated Basis [Member] | Cobalt (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	870,000,000
Consolidated Basis [Member] | Silver (ounces) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	308,500,000
Net Equity Interest [Member] | Copper (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	88,600,000,000	[2],[4]
Net Equity Interest [Member] | Gold (ounces) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	28,300,000	[2],[4]
Net Equity Interest [Member] | Molybdenum (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	2,930,000,000	[2],[4]
Net Equity Interest [Member] | Cobalt (pounds) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	480,000,000
Net Equity Interest [Member] | Silver (ounces) [Member]	'
Estimated Recoverable Proven and Probable Reserves [Line Items]	'
Estimated Recoverable Proven and Probable Copper Reserves	252,900,000
[1]	Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.
[2]	Included estimated recoverable metals contained in stockpiles.
[3]	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
[4]	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

SUPPLEMENTARY_MINERAL_RESERVE_4

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details)	Dec. 31, 2013
	MT
Total 100% basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	16,121,000,000	[1]
Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Average ore grade of copper per metric ton	0.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.16%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	3,779,000,000	[1]
Average ore grade of copper per metric ton	0.27%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1],[2]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	1,449,000,000	[1]
Average ore grade of copper per metric ton	0.31%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1],[2]
Average ore grade of molybdenum per metric ton	0.02%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	149,000,000	[1]
Average ore grade of copper per metric ton	0.45%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	2,534,000,000	[1]
Average ore grade of copper per metric ton	0.23%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1],[2]
Average ore grade of molybdenum per metric ton	0.03%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	69,000,000	[1]
Average ore grade of copper per metric ton	0.34%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	376,000,000	[1]
Average ore grade of copper per metric ton	0.42%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.02	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1],[2]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	15,000,000	[1]
Average ore grade of copper per metric ton	0.43%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	105,000,000	[1]
Average ore grade of copper per metric ton	0.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.17%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	189,000,000	[1]
North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	73,000,000	[1]
Average ore grade of copper per metric ton	0.39%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	4,047,000,000	[1]
Average ore grade of copper per metric ton	0.37%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.01%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	576,000,000	[1]
Average ore grade of copper per metric ton	0.45%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	281,000,000	[1]
Average ore grade of copper per metric ton	0.58%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.14	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	8,000,000	[1]
Average ore grade of copper per metric ton	1.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.23	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	206,000,000	[1]
Average ore grade of copper per metric ton	0.95%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	1.08	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	152,000,000	[1]
Average ore grade of copper per metric ton	0.56%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.73	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	54,000,000	[1]
Average ore grade of copper per metric ton	2.22%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.97	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	1,000,000,000	[1]
Average ore grade of copper per metric ton	1.02%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.78	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	420,000,000	[1]
Average ore grade of copper per metric ton	1.24%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	1.07	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	526,000,000	[1]
Average ore grade of copper per metric ton	0.83%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.7	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Amount of ore reserves (in metric tons of ore)	113,000,000	[1]
Average ore grade of copper per metric ton	3.34%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Copper (pounds) [Member] | Total 100% basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	128,000,000,000	[3]
Copper (pounds) [Member] | Consolidated Basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	111,200,000,000	[3],[4]
Copper (pounds) [Member] | Net Equity Interest [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	88,600,000,000	[3],[5]
Copper (pounds) [Member] | North America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	36,200,000,000	[6]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	14,600,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	7,900,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,200,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	11,000,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	500,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	2,600,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	200,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	300,000,000	[3]
Copper (pounds) [Member] | South America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	37,000,000,000	[6]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	29,400,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	3,600,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	3,900,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	100,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	30,000,000,000	[6]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	3,600,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,600,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	2,500,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	18,900,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	9,800,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	8,300,000,000	[3]
Copper (pounds) [Member] | Africa [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	8,000,000,000	[6]
Copper (pounds) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	8,000,000,000	[3]
Gold (ounces) [Member] | Total 100% basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	43,100,000	[3]
Gold (ounces) [Member] | Consolidated Basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	31,300,000	[3],[4]
Gold (ounces) [Member] | Net Equity Interest [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	28,300,000	[3],[5]
Gold (ounces) [Member] | North America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	400,000
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	100,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	100,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	200,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[2],[3]
Gold (ounces) [Member] | Indonesia [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	29,800,000
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	5,800,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	2,800,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	16,100,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	6,500,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	9,300,000	[3]
Gold (ounces) [Member] | Africa [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0
Gold (ounces) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Total 100% basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	3,280,000,000	[3]
Molybdenum (pounds) [Member] | Consolidated Basis [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	3,260,000,000	[3],[4]
Molybdenum (pounds) [Member] | Net Equity Interest [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	2,930,000,000	[3],[5]
Molybdenum (pounds) [Member] | North America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	2,550,000,000
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	150,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	390,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	1,080,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	10,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	330,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	610,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	710,000,000
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	710,000,000	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Africa [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]	'
Ore, average ore grades and recoverable proven and probable reserves [Line Items]	'
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
[1]	Excludes material contained in stockpiles.
[2]	Amounts not shown because of rounding.
[3]	Included estimated recoverable metals contained in stockpiles.
[4]	Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
[5]	Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.
[6]	Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.

SUPPLEMENTARY_OIL_AND_GAS_INFO2

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Details) (USD $)

7 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Feb. 14, 2014

Dec. 31, 2013

Feb. 14, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Haynesville [Member]

Eagle Ford [Member]

California [Member]

Gulf of Mexico [Member]

Oil and Gas Operations Segment [Member]

Natural Gas [Member]

Natural Gas [Member]

Crude Oil [Member]

Crude Oil [Member]

Minimum [Member]

Maximum [Member]

Oil and Gas In Process Activities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Asset Retirement Costs

'

'

'

'

'

'

'

'

'

$1,100,000,000

'

'

'

'

'

'

Asset Retirement Costs, Liabilities Assumed

'

'

'

0

[1]

0

[1]

'

'

'

'

1,028,000,000

[1]

'

'

'

'

'

'

General and Administrative Costs Capitalized

'

'

'

'

'

'

'

'

'

67,000,000

'

'

'

'

'

'

Interest Costs Capitalized

'

'

'

'

'

'

'

'

'

$69,000,000

'

'

'

'

'

'

Average Depletion Depreciation and Amortization Expense Per Unit of Production

35.54

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Costs Not Subject to Amortization to be Transferred, Percentage

61.00%

61.00%

61.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Majority of Costs Not Subject to Amortization to be Transferred, Period

'

'5 years

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Remainder of Costs Not Subject to Amortization to be Transferred, Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'7 years

'10 years

Net Undeveloped Acreage Covered by Expiring Leases, Percentage

41.00%

41.00%

41.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Acreage Held by Production, Percentage

'

'

'

'

'

90.00%

70.00%

'

'

'

'

'

'

'

'

'

Average Sales Prices

'

'

'

'

'

'

'

'

'

'

3.89

3.67

97.46

96.94

'

'

Total Reserve Volumes Subject to Reference Price Differential Quality Adjustments, Percentage

'

'

'

'

'

'

'

40.00%

25.00%

'

'

'

'

'

'

'

Fair Value Inputs, Discount Rate

'

10.00%

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Realized Sales Prices Used in Reserve Reports

'

3.64

99.67

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $287 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.

SUPPLEMENTARY_OIL_AND_GAS_INFO3

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Costs Incurred) (Details) (USD $)	7 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Property acquisition costs:	'
Proved properties	$12,205	[1]
Unproved properties	11,259	[2]
Exploration costs	502
Development costs	854
Total	24,820
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Oil and Gas Properties, Subject to Depletion	12,203
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Oil and Gas Properties, Not Subject to Depletion	$11,087
[1]	Included $12.2 billion from the acquisitions of PXP and MMR.
[2]	Included $11.1 billion from the acquisitions of PXP and MMR.

SUPPLEMENTARY_OIL_AND_GAS_INFO4

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Capitalized Costs) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Oil and Gas Information [Abstract]	'
Properties subject to amortization	$13,829
Accumulated amortization	-1,357
Total	$12,472

SUPPLEMENTARY_OIL_AND_GAS_INFO5

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Costs Not Subject to Amortization) (Details) (USD $)	Dec. 31, 2013
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]	'
Total	$10,887,000,000
Onshore [Member] | U.S. [Member]	'
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]	'
Acquisition costs	3,109,000,000
Exploration costs	8,000,000
Capitalized interest	11,000,000
Offshore [Member] | U.S. [Member]	'
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]	'
Acquisition costs	7,528,000,000
Exploration costs	163,000,000
Capitalized interest	53,000,000
Offshore [Member] | International [Member]	'
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]	'
Acquisition costs	15,000,000
Exploration costs	0
Capitalized interest	$0

SUPPLEMENTARY_OIL_AND_GAS_INFO6

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Results of Operations for Oil and Gas Producing Activities) (Details) (USD $)	7 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Supplemental Oil and Gas Information [Abstract]	'
Revenues from oil and gas producing activities	$2,616
Production and delivery costs	-682
Depreciation, depletion and amortization	-1,358
Income tax expense (based on FCX's statutory tax rate)	-219
Results of operations from oil and gas producing activities (excluding general and administrative expenses, interest expense and interest income)	$357

SUPPLEMENTARY_OIL_AND_GAS_INFO7

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Estimated Quantities of Oil and Natural Gas Reserves) (Details)	7 Months Ended
	Dec. 31, 2013
	Boe
Proved reserves:	'
Acquisitions of PXP and MMR (BOE)	472,000,000	[1]
Extension and discoveries (BOE)	24,000,000	[1]
Revisions of previous estimates (BOE)	7,000,000	[1]
Sales of reserves in place (BOE)	-1,000,000	[1]
Production (BOE)	-38,000,000	[1]
Balance at December 31, 2013 (BOE)	464,000,000	[1]
Proved developed reserves at December 31, 2013 (BOE)	307,000,000	[1]
Proved undeveloped reserves at December 31, 2013 (BOE)	157,000,000	[1]
Eagle Ford [Member]	'
Proved reserves:	'
Extension and discoveries (BOE)	16,000,000
Gulf of Mexico [Member]	'
Proved reserves:	'
Extension and discoveries (BOE)	5,000,000
Onshore California and Deepwater Gulf of Mexico [Member]	'
Proved reserves:	'
Revisions of previous estimates (BOE)	29,000,000
Haynesville and Deepwater Gulf of Mexico [Member]	'
Proved reserves:	'
Revisions of previous estimates (BOE)	22,000,000
Natural Gas Liquids [Member]	'
Proved reserves:	'
Balance at December 31, 2013	20,000,000
Proved developed reserves at December 31, 2013	14,000,000
Proved undeveloped reserves at December 31, 2013	6,000,000
Oil [Member]	'
Proved reserves:	'
Acquisitions of PXP and MMR	368,000,000	[1],[2]
Extensions and discoveries	20,000,000	[1],[2]
Revisions of previous estimates	11,000,000	[1],[2]
Sale of reserves in-place	0	[1],[2]
Production	-29,000,000	[1],[2]
Balance at December 31, 2013	370,000,000	[1],[2]
Proved developed reserves at December 31, 2013	236,000,000	[1],[2]
Proved undeveloped reserves at December 31, 2013	134,000,000	[1],[2]
Natural Gas [Member]	'
Proved reserves:	'
Acquisitions of PXP and MMR	626,000,000,000	[1]
Extensions and discoveries	20,000,000,000	[1]
Revisions of previous estimates	-26,000,000,000	[1]
Sale of reserves in-place	-3,000,000,000	[1]
Production	-55,000,000,000	[1]
Balance at December 31, 2013	562,000,000,000	[1]
Proved developed reserves at December 31, 2013	423,000,000,000	[1]
Proved undeveloped reserves at December 31, 2013	139,000,000,000	[1]
[1]	MMbls =illion barrels; Bcf =illion cubic feet; MMBOE =illion BOE
[2]	Included 20 MMBbls of NGL proved reserves, consisting of 14 MMBbls of proved developed and 6 MMBbls of proved undeveloped at December 31, 2013.

SUPPLEMENTARY_OIL_AND_GAS_INFO8

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Standardized Measure of Future Net Cash Flows) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]	'		'	'	'
Future cash inflows	$38,901		'	'	'
Future production expense	-12,774		'	'	'
Future development costs	-6,480	[1]	'	'	'
Future income tax expense	-4,935		'	'	'
Future net cash flows	14,712		'	'	'
Discounted at 10% per year	-5,295		'	'	'
Standardized Measure	9,417		'	'	'
Asset Retirement Obligation	2,328		1,146	921	856
Oil and Gas Operations Segment [Member]	'		'	'	'
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]	'		'	'	'
Asset Retirement Obligation	$1,800		'	'	'
[1]	Included estimated asset retirement costs of $1.8 billion.

SUPPLEMENTARY_OIL_AND_GAS_INFO9

SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Changes in the Standardized Measure) (Details) (USD $)	7 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Supplemental Oil and Gas Information [Abstract]	'
Reserves acquired in the acquisitions of PXP and MMR	$14,467
Sales, net of production expenses	-2,296
Net changes in sales and transfer prices, net of production expenses	-459
Extensions, discoveries and improved recoveries	752
Changes in estimated future development costs	-1,190
Previously estimated development costs incurred during the year	578
Sales of reserves in-place	-12
Other purchases of reserves in-place	0
Revisions of quantity estimates	102
Accretion of discount	701
Net change in income taxes	-3,226
Balance at December 31, 2013	$9,417

SCHEDULE_II_VALUATION_AND_QUAL2

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Materials and supplies inventory allowance	'		'		'
Movement in Valuation Allowances and Reserves [Roll Forward]	'		'		'
Balance at Beginning of Year	$27		$26		$26
Additions Charged to Cost and Expense	22		7		4
Additons Charged to Other Accounts	0		0		0
Other Additions (Deductions)	-25	[1]	-6	[1]	-4	[1]
Balance at End of Year	24		27		26
Valuation allowance for deferred tax assets	'		'		'
Movement in Valuation Allowances and Reserves [Roll Forward]	'		'		'
Balance at Beginning of Year	2,443		2,393		2,226
Additions Charged to Cost and Expense	42		49		146
Additons Charged to Other Accounts	0		1		21
Other Additions (Deductions)	0		0		0
Balance at End of Year	2,485		2,443		2,393
Reserves for non-income taxes	'		'		'
Movement in Valuation Allowances and Reserves [Roll Forward]	'		'		'
Balance at Beginning of Year	80		73		73
Additions Charged to Cost and Expense	35		21		12
Additons Charged to Other Accounts	-1		-2		-2
Other Additions (Deductions)	-36	[2]	-12	[2]	-10	[2]
Balance at End of Year	$78		$80		$73
[1]	Primarily represents write-offs of obsolete materials and supplies inventories.
[2]	Represents amounts paid or adjustments to reserves based on revised estimates.