FINANCIAL INSTRUMENTS (Unsettled Derivatives) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
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.