Guarantor Financial Statements (Unaudited) Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,458		$ 1,985		$ 3,294	$ 3,705
Accounts receivable	2,758		2,562
Other current assets	6,038		5,425
Total current assets	10,254		9,972
Property, plant, equipment and mining development costs, net	25,407		24,042
Oil and gas properties - full cost method
Subject to amortization, less accumulated amortization	11,057		12,472
Not subject to amortization	10,769		10,887
Investments in consolidated subsidiaries	0		0
Goodwill	1,717		1,916
Other assets	4,805		4,184
Total assets	64,009		63,473		63,157
LIABILITIES AND EQUITY
Current liabilities	7,558		4,773
Long-term debt, less current portion	17,512		20,394
Deferred income taxes	7,451		7,410
Environmental and asset retirement obligations, less current portion	3,294		3,259
Other liabilities	1,782		1,690
Total liabilities	37,597		37,526
Redeemable noncontrolling interest	745		716
Equity:
Stockholders' equity	21,332		20,934
Noncontrolling interests	4,335		4,297
Total equity	25,667		25,231
Total liabilities and equity	64,009		63,473
FCX Issuer [Member]
Current assets:
Cash and cash equivalents	0		0		0	0
Accounts receivable	388		855
Other current assets	78		114
Total current assets	466		969
Property, plant, equipment and mining development costs, net	25		27
Oil and gas properties - full cost method
Subject to amortization, less accumulated amortization	0		0
Not subject to amortization	0		0
Investments in consolidated subsidiaries	32,769		31,162
Goodwill	0		0
Other assets	6,346		7,126
Total assets	39,606		39,284
LIABILITIES AND EQUITY
Current liabilities	1,550		1,003
Long-term debt, less current portion	12,435		13,184
Deferred income taxes	4,244	[1]	4,137	[1]
Environmental and asset retirement obligations, less current portion	0		0
Other liabilities	46		26
Total liabilities	18,275		18,350
Redeemable noncontrolling interest	0		0
Equity:
Stockholders' equity	21,331		20,934
Noncontrolling interests	0		0
Total equity	21,331		20,934
Total liabilities and equity	39,606		39,284
FM O&G LLC Guarantor [Member]
Current assets:
Cash and cash equivalents	1		0		59	0
Accounts receivable	2,840		659
Other current assets	56		38
Total current assets	2,897		697
Property, plant, equipment and mining development costs, net	45		43
Oil and gas properties - full cost method
Subject to amortization, less accumulated amortization	4,583		6,207
Not subject to amortization	1,853		2,649
Investments in consolidated subsidiaries	10,107		9,712
Goodwill	217		437
Other assets	3,432		4,640
Total assets	23,134		24,385
LIABILITIES AND EQUITY
Current liabilities	1,026		758
Long-term debt, less current portion	6,762		7,199
Deferred income taxes	0		0
Environmental and asset retirement obligations, less current portion	291		301
Other liabilities	3,457		3,436
Total liabilities	11,536		11,694
Redeemable noncontrolling interest	0		0
Equity:
Stockholders' equity	11,598		12,691
Noncontrolling interests	0		0
Total equity	11,598		12,691
Total liabilities and equity	23,134		24,385
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	1,457		1,985		3,235	3,705
Accounts receivable	2,466		2,258
Other current assets	5,904		5,273
Total current assets	9,827		9,516
Property, plant, equipment and mining development costs, net	25,337		23,972
Oil and gas properties - full cost method
Subject to amortization, less accumulated amortization	6,460		6,265
Not subject to amortization	8,916		8,238
Investments in consolidated subsidiaries	11,416		12,468
Goodwill	1,500		1,479
Other assets	4,241		4,128
Total assets	67,697		66,066
LIABILITIES AND EQUITY
Current liabilities	6,088		4,222
Long-term debt, less current portion	5,885		8,056
Deferred income taxes	3,207		3,273
Environmental and asset retirement obligations, less current portion	3,003		2,958
Other liabilities	1,753		1,893
Total liabilities	19,936		20,402
Redeemable noncontrolling interest	745		716
Equity:
Stockholders' equity	43,140		41,100
Noncontrolling interests	3,876		3,848
Total equity	47,016		44,948
Total liabilities and equity	67,697		66,066
Eliminations [Member]
Current assets:
Cash and cash equivalents	0		0		0	0
Accounts receivable	(2,936)		(1,210)
Other current assets	0		0
Total current assets	(2,936)		(1,210)
Property, plant, equipment and mining development costs, net	0		0
Oil and gas properties - full cost method
Subject to amortization, less accumulated amortization	14		0
Not subject to amortization	0		0
Investments in consolidated subsidiaries	(54,292)		(53,342)
Goodwill	0		0
Other assets	(9,214)		(11,710)
Total assets	(66,428)		(66,262)
LIABILITIES AND EQUITY
Current liabilities	(1,106)		(1,210)
Long-term debt, less current portion	(7,570)		(8,045)
Deferred income taxes	0		0
Environmental and asset retirement obligations, less current portion	0		0
Other liabilities	(3,474)		(3,665)
Total liabilities	(12,150)		(12,920)
Redeemable noncontrolling interest	0		0
Equity:
Stockholders' equity	(54,737)		(53,791)
Noncontrolling interests	459		449
Total equity	(54,278)		(53,342)
Total liabilities and equity	$ (66,428)		$ (66,262)

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