Guarantor Financial Statements (Unaudited) Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
ASSETS
Current assets		$ 8,697	$ 9,045
Property, plant, equipment and mining development costs, net		27,095	26,220
Oil and gas properties, net - full cost method
Subject to amortization, less accumulated amortization		4,649	9,187
Not subject to amortization		9,312	10,087
Investments in consolidated subsidiaries		0	0
Other assets		4,255	4,135
Total assets		54,008	58,674	$ 63,903
LIABILITIES AND EQUITY
Current liabilities		4,739	5,172
Long-term debt, less current portion		20,111	18,371
Deferred income taxes		4,870	6,398
Environmental and asset retirement obligations, less current portion		3,716	3,647
Other liabilities		1,760	1,861
Total liabilities		35,196	35,449
Redeemable noncontrolling interest		757	751
Equity:
Stockholders' equity		13,805	18,287
Noncontrolling interests		4,250	4,187
Total equity		18,055	22,474
Total liabilities and equity		54,008	58,674
FCX Issuer [Member]
ASSETS
Current assets		257	323
Property, plant, equipment and mining development costs, net		20	22
Oil and gas properties, net - full cost method
Subject to amortization, less accumulated amortization		0	0
Not subject to amortization		0	0
Investments in consolidated subsidiaries		24,153	28,765
Other assets		9,991	8,914
Total assets		34,421	38,024
LIABILITIES AND EQUITY
Current liabilities		3,106	1,592
Long-term debt, less current portion		15,841	14,930
Deferred income taxes	[1]	1,613	3,161
Environmental and asset retirement obligations, less current portion		0	0
Other liabilities		56	54
Total liabilities		20,616	19,737
Redeemable noncontrolling interest		0	0
Equity:
Stockholders' equity		13,805	18,287
Noncontrolling interests		0	0
Total equity		13,805	18,287
Total liabilities and equity		34,421	38,024
FM O&G LLC Guarantor [Member]
ASSETS
Current assets		2,900	2,635
Property, plant, equipment and mining development costs, net		51	46
Oil and gas properties, net - full cost method
Subject to amortization, less accumulated amortization		1,507	3,296
Not subject to amortization		2,649	2,447
Investments in consolidated subsidiaries		2,216	6,460
Other assets		4,703	3,947
Total assets		14,026	18,831
LIABILITIES AND EQUITY
Current liabilities		433	560
Long-term debt, less current portion		5,181	3,874
Deferred income taxes		0	0
Environmental and asset retirement obligations, less current portion		307	302
Other liabilities		3,361	3,372
Total liabilities		9,282	8,108
Redeemable noncontrolling interest		0	0
Equity:
Stockholders' equity		4,744	10,723
Noncontrolling interests		0	0
Total equity		4,744	10,723
Total liabilities and equity		14,026	18,831
Non-Guarantor Subsidiaries [Member]
ASSETS
Current assets		9,665	8,659
Property, plant, equipment and mining development costs, net		27,024	26,152
Oil and gas properties, net - full cost method
Subject to amortization, less accumulated amortization		3,142	5,907
Not subject to amortization		6,659	7,640
Investments in consolidated subsidiaries		4,019	10,246
Other assets		4,179	4,061
Total assets		54,688	62,665
LIABILITIES AND EQUITY
Current liabilities		5,325	5,592
Long-term debt, less current portion		10,221	8,879
Deferred income taxes		3,257	3,237
Environmental and asset retirement obligations, less current portion		3,409	3,345
Other liabilities		1,829	1,910
Total liabilities		24,041	22,963
Redeemable noncontrolling interest		757	751
Equity:
Stockholders' equity		26,173	35,268
Noncontrolling interests		3,717	3,683
Total equity		29,890	38,951
Total liabilities and equity		54,688	62,665
Eliminations [Member]
ASSETS
Current assets		(4,125)	(2,572)
Property, plant, equipment and mining development costs, net		0	0
Oil and gas properties, net - full cost method
Subject to amortization, less accumulated amortization		0	(16)
Not subject to amortization		4	0
Investments in consolidated subsidiaries		(30,388)	(45,471)
Other assets		(14,618)	(12,787)
Total assets		(49,127)	(60,846)
LIABILITIES AND EQUITY
Current liabilities		(4,125)	(2,572)
Long-term debt, less current portion		(11,132)	(9,312)
Deferred income taxes		0	0
Environmental and asset retirement obligations, less current portion		0	0
Other liabilities		(3,486)	(3,475)
Total liabilities		(18,743)	(15,359)
Redeemable noncontrolling interest		0	0
Equity:
Stockholders' equity		(30,917)	(45,991)
Noncontrolling interests		533	504
Total equity		(30,384)	(45,487)
Total liabilities and equity		$ (49,127)	$ (60,846)

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