Guarantor Financial Statements (Unaudited) Condensed Consolidating Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Revenues	$ 3,334		$ 3,938		$ 6,576		$ 7,709
Total costs and expenses	3,316		6,359		10,430		13,160
Operating (loss) income	18		(2,421)		(3,854)		(5,451)
Interest expense, net	(196)		(142)		(387)		(281)
Other income (expense), net	64		36		100		43
Loss before income taxes and equity in affiliated companies' net earnings	(114)		(2,527)		(4,141)		(5,689)
(Provision for) benefit from income taxes	(116)		699		(193)		1,413
Equity in affiliated companies' net (losses) earnings	1		0		8		1
Net loss from continuing operations	(229)		(1,828)		(4,326)		(4,275)
Net (loss) income from discontinued operations	(181)		29		(185)		70
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(410)		(1,799)		(4,511)		(4,205)
Income (Loss) From Continuing Operations Attributable to Noncontrolling Entity and Preferred Dividends	(57)		(26)		(130)		(68)
Net income from discontinued operations attributable to noncontrolling interests	(12)		(26)		(22)		(52)
Net loss attributable to common stockholders	(479)		(1,851)		(4,663)		(4,325)
Other comprehensive income (loss)	15		9		15		21
Total comprehensive (loss) income	(464)		(1,842)		(4,648)		(4,304)
Impairment of oil and gas properties	291		2,686		4,078		5,790
FCX Issuer [Member]
Revenues	0		0		0		0
Total costs and expenses	17		19		44		35
Operating (loss) income	(17)		(19)		(44)		(35)
Interest expense, net	(141)		(121)		(278)		(236)
Other income (expense), net	107		127		157		156
Loss before income taxes and equity in affiliated companies' net earnings	(51)		(13)		(165)		(115)
(Provision for) benefit from income taxes	(345)		(265)		(2,128)		(686)
Equity in affiliated companies' net (losses) earnings	(90)		(1,573)		(2,376)		(3,524)
Net loss from continuing operations	(486)		(1,851)		(4,669)		(4,325)
Net (loss) income from discontinued operations	5		0		5		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(481)		(1,851)		(4,664)		(4,325)
Income (Loss) From Continuing Operations Attributable to Noncontrolling Entity and Preferred Dividends	0		0		0		0
Net income from discontinued operations attributable to noncontrolling interests	0		0		0		0
Net loss attributable to common stockholders	(481)		(1,851)		(4,664)		(4,325)
Other comprehensive income (loss)	15		9		15		21
Total comprehensive (loss) income	(466)		(1,842)		(4,649)		(4,304)
Impairment of oil and gas properties					0		0
FM O&G LLC Guarantor [Member]
Revenues	106		169		184		350
Total costs and expenses	964	[1]	1,217	[2]	2,593	[3]	2,535	[4]
Operating (loss) income	(858)		(1,048)		(2,409)		(2,185)
Interest expense, net	(15)		(2)		(19)		(6)
Other income (expense), net	0		0		0		0
Loss before income taxes and equity in affiliated companies' net earnings	(873)		(1,050)		(2,428)		(2,191)
(Provision for) benefit from income taxes	306		374		922		790
Equity in affiliated companies' net (losses) earnings	(280)		(1,920)		(2,984)		(4,279)
Net loss from continuing operations	(847)		(2,596)		(4,490)		(5,680)
Net (loss) income from discontinued operations	0		0		0		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(847)		(2,596)		(4,490)		(5,680)
Income (Loss) From Continuing Operations Attributable to Noncontrolling Entity and Preferred Dividends	0		0		0		0
Net income from discontinued operations attributable to noncontrolling interests	0		0		0		0
Net loss attributable to common stockholders	(847)		(2,596)		(4,490)		(5,680)
Other comprehensive income (loss)	0		0		0		0
Total comprehensive (loss) income	(847)		(2,596)		(4,490)		(5,680)
Impairment of oil and gas properties	200		1,000		1,436		2,052
Impairment of Oil and Gas Properties rounded					1,500
Non-Guarantor Subsidiaries [Member]
Revenues	3,228		3,769		6,392		7,359
Total costs and expenses	2,335	[1]	5,120	[2]	7,787	[3]	10,603	[4]
Operating (loss) income	893		(1,351)		(1,395)		(3,244)
Interest expense, net	(124)		(53)		(238)		(96)
Other income (expense), net	28		(57)		68		(49)
Loss before income taxes and equity in affiliated companies' net earnings	797		(1,461)		(1,565)		(3,389)
(Provision for) benefit from income taxes	(69)		592		1,019		1,317
Equity in affiliated companies' net (losses) earnings	(853)		(2,972)		(4,483)		(6,502)
Net loss from continuing operations	(125)		(3,841)		(5,029)		(8,574)
Net (loss) income from discontinued operations	(175)		22		(169)		56
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(300)		(3,819)		(5,198)		(8,518)
Income (Loss) From Continuing Operations Attributable to Noncontrolling Entity and Preferred Dividends	(50)		(12)		(117)		(42)
Net income from discontinued operations attributable to noncontrolling interests	(12)		(26)		(22)		(52)
Net loss attributable to common stockholders	(362)		(3,857)		(5,337)		(8,612)
Other comprehensive income (loss)	15		9		15		21
Total comprehensive (loss) income	(347)		(3,848)		(5,322)		(8,591)
Impairment of oil and gas properties	100		1,700		2,622		3,717
Consolidation, Eliminations [Member]
Revenues	0		0		0		0
Total costs and expenses	0		3		6		(13)
Operating (loss) income	0		(3)		(6)		13
Interest expense, net	84		34		148		57
Other income (expense), net	(71)		(34)		(125)		(64)
Loss before income taxes and equity in affiliated companies' net earnings	13		(3)		17		6
(Provision for) benefit from income taxes	(8)		(2)		(6)		(8)
Equity in affiliated companies' net (losses) earnings	1,224		6,465		9,851		14,306
Net loss from continuing operations	1,229		6,460		9,862		14,304
Net (loss) income from discontinued operations	(11)		7		(21)		14
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,218		6,467		9,841		14,318
Income (Loss) From Continuing Operations Attributable to Noncontrolling Entity and Preferred Dividends	(7)		(14)		(13)		(26)
Net income from discontinued operations attributable to noncontrolling interests	0		0		0		0
Net loss attributable to common stockholders	1,211		6,453		9,828		14,292
Other comprehensive income (loss)	(15)		(9)		(15)		(21)
Total comprehensive (loss) income	$ 1,196		$ 6,444		9,813		14,271
Impairment of oil and gas properties					$ 20		$ 21

[1] Includes charges totaling $0.2 billion at the FM O&G LLC guarantor and $0.1 billion at the non-guarantor subsidiaries related to impairment of FCX's oil and gas properties pursuant to full cost accounting rules.

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

[3] Includes charges totaling $1.5 billion at the FM O&G LLC guarantor and $2.6 billion at the non-guarantor subsidiaries related to impairment of FCX's oil and gas properties pursuant to full cost accounting rules.

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