Guarantor Financial Statements (Unaudited) Condensed Consolidating Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Revenues	$ 4,248		$ 5,522	$ 8,401		$ 10,507
Total costs and expenses	6,622		4,369	13,738		8,243
Operating (loss) income	(2,374)		1,153	(5,337)		2,264
Interest expense, net	(149)		(164)	(295)		(325)
Net gain on early extinguishment of debt	0		5	0		5
Other income (expense), net	37		(8)	44		25
(Loss) income before income taxes and equity in affiliated companies' net earnings	(2,486)		986	(5,588)		1,969
Benefit from (provision for) income taxes	687		(328)	1,382		(685)
Equity in affiliated companies' net (losses) earnings	0		2	1		2
Net (loss) income	(1,799)		660	(4,205)		1,286
Net income and preferred dividends attributable to noncontrolling interests	(52)		(178)	(120)		(294)
Net (loss) income attributable to common stockholders	(1,851)		482	(4,325)		992
Other comprehensive income (loss)	9		1	21		4
Total comprehensive (loss) income	(1,842)		483	(4,304)		996
Impairment of oil and gas properties	2,686		0	5,790		0
FCX Issuer [Member]
Revenues	0		0	0		0
Total costs and expenses	19		21	35		32
Operating (loss) income	(19)		(21)	(35)		(32)
Interest expense, net	(121)		(87)	(236)		(169)
Net gain on early extinguishment of debt			(1)			(1)
Other income (expense), net	127		17	156		37
(Loss) income before income taxes and equity in affiliated companies' net earnings	(13)		(92)	(115)		(165)
Benefit from (provision for) income taxes	(265)		26	(686)		5
Equity in affiliated companies' net (losses) earnings	(1,573)		548	(3,524)		1,152
Net (loss) income	(1,851)		482	(4,325)		992
Net income and preferred dividends attributable to noncontrolling interests	0		0	0		0
Net (loss) income attributable to common stockholders	(1,851)		482	(4,325)		992
Other comprehensive income (loss)	9		1	21		4
Total comprehensive (loss) income	(1,842)		483	(4,304)		996
Impairment of oil and gas properties				0
FM O&G LLC Guarantor [Member]
Revenues	169		570	350		1,214
Total costs and expenses	1,217	[1]	489	2,535	[2]	1,015
Operating (loss) income	(1,048)		81	(2,185)		199
Interest expense, net	(2)		(44)	(6)		(85)
Net gain on early extinguishment of debt			6			6
Other income (expense), net	0		1	0		1
(Loss) income before income taxes and equity in affiliated companies' net earnings	(1,050)		44	(2,191)		121
Benefit from (provision for) income taxes	374		26	790		(17)
Equity in affiliated companies' net (losses) earnings	(1,920)		126	(4,279)		256
Net (loss) income	(2,596)		196	(5,680)		360
Net income and preferred dividends attributable to noncontrolling interests	0		0	0		0
Net (loss) income attributable to common stockholders	(2,596)		196	(5,680)		360
Other comprehensive income (loss)	0		0	0		0
Total comprehensive (loss) income	(2,596)		196	(5,680)		360
Impairment of oil and gas properties	990			2,052
Non-Guarantor Subsidiaries [Member]
Revenues	4,079		4,952	8,051		9,293
Total costs and expenses	5,383	[1]	3,865	11,181	[2]	7,204
Operating (loss) income	(1,304)		1,087	(3,130)		2,089
Interest expense, net	(67)		(51)	(124)		(109)
Net gain on early extinguishment of debt			0			0
Other income (expense), net	(56)		(8)	(48)		25
(Loss) income before income taxes and equity in affiliated companies' net earnings	(1,427)		1,028	(3,302)		2,005
Benefit from (provision for) income taxes	580		(378)	1,286		(670)
Equity in affiliated companies' net (losses) earnings	(2,972)		154	(6,502)		339
Net (loss) income	(3,819)		804	(8,518)		1,674
Net income and preferred dividends attributable to noncontrolling interests	(38)		(180)	(94)		(291)
Net (loss) income attributable to common stockholders	(3,857)		624	(8,612)		1,383
Other comprehensive income (loss)	9		1	21		4
Total comprehensive (loss) income	(3,848)		625	(8,591)		1,387
Impairment of oil and gas properties	1,674			3,717
Eliminations [Member]
Revenues	0		0	0		0
Total costs and expenses	3		(6)	(13)		(8)
Operating (loss) income	(3)		6	13		8
Interest expense, net	41		18	71		38
Net gain on early extinguishment of debt			0			0
Other income (expense), net	(34)		(18)	(64)		(38)
(Loss) income before income taxes and equity in affiliated companies' net earnings	4		6	20		8
Benefit from (provision for) income taxes	(2)		(2)	(8)		(3)
Equity in affiliated companies' net (losses) earnings	6,465		(826)	14,306		(1,745)
Net (loss) income	6,467		(822)	14,318		(1,740)
Net income and preferred dividends attributable to noncontrolling interests	(14)		2	(26)		(3)
Net (loss) income attributable to common stockholders	6,453		(820)	14,292		(1,743)
Other comprehensive income (loss)	(9)		(1)	(21)		(4)
Total comprehensive (loss) income	$ 6,444		$ (821)	14,271		$ (1,747)
Impairment of oil and gas properties				$ 21

[1] Includes charges totaling $1.0 billion at the FM O&G LLC guarantor and $1.7 billion at the non-guarantor subsidiaries related to ceiling test impairment of FCX's oil and gas properties pursuant to full cost accounting rules.

[2] Includes charges totaling $2.1 billion at the FM O&G LLC guarantor and $3.7 billion at the non-guarantor subsidiaries related to ceiling test impairment of FCX's oil and gas properties pursuant to full cost accounting rules.