FINANCIAL INSTRUMENTS (Oil and Gas) (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Deferred Option Premiums and Accrued Interest [Member]	Dec. 31, 2013 Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 75 MBbls [Member] Put Option [Member] MBbls		Dec. 31, 2013 Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 30 MBbls [Member] Put Option [Member] MBbls		Dec. 31, 2013 Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 5 MBbls [Member] Put Option [Member] MBbls		Dec. 31, 2013 Crude Oil Options [Member] 2015 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 84 MBbls [Member] Put Option [Member] MBbls		Dec. 31, 2013 Natural Gas Swaps [Member] Derivatives Not Designated as Hedging Instruments [Member] MMBTU	Dec. 31, 2013 Natural Gas Swaps [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] MMBTU	Dec. 31, 2013 Weighted Average [Member] Crude Oil Options [Member]	Dec. 31, 2013 Weighted Average [Member] Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 75 MBbls [Member] Put Option [Member]		Dec. 31, 2013 Weighted Average [Member] Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 30 MBbls [Member] Put Option [Member]		Dec. 31, 2013 Weighted Average [Member] Crude Oil Options [Member] 2014 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 5 MBbls [Member] Put Option [Member]		Dec. 31, 2013 Weighted Average [Member] Crude Oil Options [Member] 2015 Positions [Member] Derivatives Not Designated as Hedging Instruments [Member] 84 MBbls [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.