INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Components of Inventories) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	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.