Guarantor Financial Statements (Unaudited) Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Jun. 03, 2013		Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Cash and cash equivalents	$ 3,294				$ 3,705	$ 4,508	$ 4,822
Accounts receivable	1,879
Inventories	4,946
Other current assets	459				387
Total current assets	10,578				10,297
Property, plant, equipment and development costs, net	46,214				20,999
Investments in consolidated subsidiaries	0
Goodwill	1,904		1,904	[1]	0
Other assets	4,461
Total assets	63,157				35,440	33,689
Current liabilities	5,610				3,343
Long-term debt, less current portion	21,142				3,525
Deferred income taxes	6,840	[2]			3,490
Reclamation and environmental obligations, less current portion	3,106				2,127
Other liabilities	1,810				1,644
Total liabilities	38,508				14,129
Redeemable noncontrolling interest	782				0
Stockholders' equity	19,878				17,543
Noncontrolling interests	3,989				3,768
Total equity	23,867				21,311
Total liabilities and equity	63,157				35,440
Parent Company [Member]
Cash and cash equivalents	0				0
Accounts receivable	4,453
Inventories	0
Other current assets	101
Total current assets	4,554
Property, plant, equipment and development costs, net	29
Investments in consolidated subsidiaries	30,372
Goodwill	0
Other assets	4,020
Total assets	38,975
Current liabilities	1,898
Long-term debt, less current portion	13,484
Deferred income taxes	3,709	[2]
Reclamation and environmental obligations, less current portion	0
Other liabilities	6
Total liabilities	19,097
Redeemable noncontrolling interest	0
Stockholders' equity	19,878
Noncontrolling interests	0
Total equity	19,878
Total liabilities and equity	38,975
Freeport-McMoRan Oil & Gas [Member]
Cash and cash equivalents	59				0
Accounts receivable	1,312
Inventories	20
Other current assets	80
Total current assets	1,471
Property, plant, equipment and development costs, net	8,730
Investments in consolidated subsidiaries	7,442
Goodwill	454
Other assets	4,027
Total assets	22,124
Current liabilities	2,102
Long-term debt, less current portion	10,282
Deferred income taxes	0	[2]
Reclamation and environmental obligations, less current portion	275
Other liabilities	65
Total liabilities	12,724
Redeemable noncontrolling interest	0
Stockholders' equity	9,400
Noncontrolling interests	0
Total equity	9,400
Total liabilities and equity	22,124
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	3,235				3,705
Accounts receivable	1,487
Inventories	4,926
Other current assets	278
Total current assets	9,926
Property, plant, equipment and development costs, net	37,455
Investments in consolidated subsidiaries	84
Goodwill	1,450
Other assets	4,337
Total assets	53,252
Current liabilities	6,983
Long-term debt, less current portion	6,489
Deferred income taxes	3,131	[2]
Reclamation and environmental obligations, less current portion	2,831
Other liabilities	1,739
Total liabilities	21,173
Redeemable noncontrolling interest	782
Stockholders' equity	27,464
Noncontrolling interests	3,833
Total equity	31,297
Total liabilities and equity	53,252
Consolidation, Eliminations [Member]
Cash and cash equivalents	0				0
Accounts receivable	(5,373)
Inventories	0
Other current assets	0
Total current assets	(5,373)
Property, plant, equipment and development costs, net	0
Investments in consolidated subsidiaries	(37,898)
Goodwill	0
Other assets	(7,923)
Total assets	(51,194)
Current liabilities	(5,373)
Long-term debt, less current portion	(9,113)
Deferred income taxes	0	[2]
Reclamation and environmental obligations, less current portion	0
Other liabilities	0
Total liabilities	(14,486)
Redeemable noncontrolling interest	0
Stockholders' equity	(36,864)
Noncontrolling interests	156
Total equity	(36,708)
Total liabilities and equity	$ (51,194)

[1] The final valuation of assets acquired, liabilities assumed and 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 noncontrolling interest based on the preliminary fair value analysis.

[2] All U.S. related deferred income taxes are recorded at the parent company.