Guarantor Financial Statements (Unaudited) Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Jun. 03, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Cash and cash equivalents	$ 2,219			$ 3,705	$ 3,727	$ 4,822
Accounts receivable	2,229
Inventories	4,853
Other current assets	305			387
Total current assets	9,606			10,297
Property, plant, equipment and development costs, net	46,647			20,999
Investments in consolidated subsidiaries	0
Goodwill	1,932		1,932	0
Other assets	4,413
Total assets	62,598			35,440	34,517
Current liabilities	4,498			3,343
Long-term debt, less current portion	21,053			3,525
Deferred income taxes	6,922	[1]		3,490
Reclamation and environmental obligations, less current portion	3,077			2,127
Other liabilities	1,774			1,644
Total liabilities	37,324			14,129
Redeemable noncontrolling interest	720			0
Stockholders' equity	20,405			17,543
Noncontrolling interests	4,149			3,768
Total equity	24,554			21,311
Total liabilities and equity	62,598			35,440
FCX Issuer [Member]
Cash and cash equivalents	0			0
Accounts receivable	706
Inventories	0
Other current assets	49
Total current assets	755
Property, plant, equipment and development costs, net	28
Investments in consolidated subsidiaries	30,314
Goodwill	0
Other assets	7,448
Total assets	38,545
Current liabilities	911
Long-term debt, less current portion	13,484
Deferred income taxes	3,718	[1]
Reclamation and environmental obligations, less current portion	0
Other liabilities	27
Total liabilities	18,140
Redeemable noncontrolling interest	0
Stockholders' equity	20,405
Noncontrolling interests	0
Total equity	20,405
Total liabilities and equity	38,545
FM O&G LLC Guarantor [Member]
Cash and cash equivalents	2			0
Accounts receivable	964
Inventories	18
Other current assets	31
Total current assets	1,015
Property, plant, equipment and development costs, net	8,865
Investments in consolidated subsidiaries	9,596
Goodwill	455
Other assets	4,219
Total assets	24,150
Current liabilities	726
Long-term debt, less current portion	10,049
Deferred income taxes	0	[1]
Reclamation and environmental obligations, less current portion	281
Other liabilities	3,447
Total liabilities	14,503
Redeemable noncontrolling interest	0
Stockholders' equity	9,647
Noncontrolling interests	0
Total equity	9,647
Total liabilities and equity	24,150
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	2,217			3,705
Accounts receivable	1,966
Inventories	4,835
Other current assets	225
Total current assets	9,243
Property, plant, equipment and development costs, net	37,754
Investments in consolidated subsidiaries	0
Goodwill	1,477
Other assets	4,401
Total assets	52,875
Current liabilities	4,268
Long-term debt, less current portion	5,421
Deferred income taxes	3,204	[1]
Reclamation and environmental obligations, less current portion	2,796
Other liabilities	2,054
Total liabilities	17,743
Redeemable noncontrolling interest	720
Stockholders' equity	30,684
Noncontrolling interests	3,728
Total equity	34,412
Total liabilities and equity	52,875
Eliminations [Member]
Cash and cash equivalents	0			0
Accounts receivable	(1,407)
Inventories	0
Other current assets	0
Total current assets	(1,407)
Property, plant, equipment and development costs, net	0
Investments in consolidated subsidiaries	(39,910)
Goodwill	0
Other assets	(11,655)
Total assets	(52,972)
Current liabilities	(1,407)
Long-term debt, less current portion	(7,901)
Deferred income taxes	0	[1]
Reclamation and environmental obligations, less current portion	0
Other liabilities	(3,754)
Total liabilities	(13,062)
Redeemable noncontrolling interest	0
Stockholders' equity	(40,331)
Noncontrolling interests	421
Total equity	(39,910)
Total liabilities and equity	$ (52,972)

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