Business Segments (Segment Reporting) (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment				4
Revenues	$ 5,737		$ 5,416	$ 11,126	$ 12,019
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(3,548)		(3,003)	(6,712)	(6,153)
Cost, Depreciation, Amortization and Depletion	547		507	946	996
Selling, general and administrative expenses	(115)		(100)	(241)	(215)
Mining exploration and research expenses	42		25	73	49
Environmental obligations and shutdown costs	74		29	141	45
Operating income	1,410		1,736	3,011	4,545
Interest expense, net	171		156	322	283
Provision for (benefit from) income taxes	539		571	1,038	1,395
Net income (loss) attributable to noncontrolling interests	388		198	774	575
Total assets	50,907		50,113	50,907	50,113	$ 51,093
Capital expenditures	1,163		863	2,284	1,586
Metals inventory adjustments	1		18	2	18
Net gain on sales of assets	$ 0		(2)	$ 0	(2)
PT Smelting
Segment Reporting Information [Line Items]
Deferred Intercompany Profit, Percentage				39.50%
PT Freeport Indonesia
Segment Reporting Information [Line Items]
Portion of Gold Sales Attributable to Parent		$ 35
Administrative fine			41	$ 55	41
PT Freeport Indonesia | FCX
Segment Reporting Information [Line Items]
Noncontrolling interest, ownership percentage by parent	48.76%			48.76%		81.00%
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	$ 40		47	$ 169	192
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(1,166)		(1,117)	(2,328)	(2,135)
Cost, Depreciation, Amortization and Depletion	99		102	202	207
Selling, general and administrative expenses	(1)		(1)	(2)	(2)
Mining exploration and research expenses	1		1	1	1
Environmental obligations and shutdown costs	1		(13)	22	(13)
Operating income	321		640	704	1,467
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	8,921		8,177	8,921	8,177
Capital expenditures	182		146	378	276
Metals inventory adjustments	1		7	1	7
Net gain on sales of assets			0		0
Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	973		882	2,165	2,148
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(783)		(742)	(1,590)	(1,412)
Cost, Depreciation, Amortization and Depletion	132		102	239	199
Selling, general and administrative expenses	(2)		(2)	(4)	(4)
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	231		159	751	764
Interest expense, net	55		4	84	7
Provision for (benefit from) income taxes	113		61	307	302
Net income (loss) attributable to noncontrolling interests	20		58	178	232
Total assets	10,334		10,222	10,334	10,222
Capital expenditures	83		68	183	124
Metals inventory adjustments	0		11	0	11
Net gain on sales of assets			0		0
Corporate And Eliminations
Segment Reporting Information [Line Items]
Revenues	478		381	1,075	786
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	1,554		1,728	3,051	3,443
Cost, Depreciation, Amortization and Depletion	19		16	32	32
Selling, general and administrative expenses	(75)		(62)	(162)	(139)
Mining exploration and research expenses	41		24	72	48
Environmental obligations and shutdown costs	73		42	119	58
Operating income	(263)		(185)	(537)	(327)
Interest expense, net	95		137	202	257
Provision for (benefit from) income taxes	16		76	(9)	73
Net income (loss) attributable to noncontrolling interests	0		(1)	(43)	12
Total assets	8,068		7,955	8,068	7,955
Capital expenditures	488		219	838	371
Metals inventory adjustments	0		0	1	0
Net gain on sales of assets			(2)		(2)
Intersegment
Segment Reporting Information [Line Items]
Revenues	0		0	0	0
Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	1,550		1,808	3,091	3,614
Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	175		134	419	242
PT Smelting | Affiliated Entity [Member]
Segment Reporting Information [Line Items]
Revenues			827	27	1,700
Morenci | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	26		17	58	107
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(422)		(397)	(803)	(760)
Cost, Depreciation, Amortization and Depletion	42		44	85	88
Selling, general and administrative expenses	(1)		(1)	(1)	(1)
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		(13)	0	(13)
Operating income	130		318	331	712
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	3,167		2,839	3,167	2,839
Capital expenditures	67		63	123	136
Metals inventory adjustments	1		0	1	0
Net gain on sales of assets			0		0
Morenci | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	570		730	1,163	1,441
Other Individually Immaterial Operating Segments | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	14		30	111	85
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(744)		(720)	(1,525)	(1,375)
Cost, Depreciation, Amortization and Depletion	57		58	117	119
Selling, general and administrative expenses	0		0	(1)	(1)
Mining exploration and research expenses	1		1	1	1
Environmental obligations and shutdown costs	1		0	22	0
Operating income	191		322	373	755
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	5,754		5,338	5,754	5,338
Capital expenditures	115		83	255	140
Metals inventory adjustments	0		7	0	7
Net gain on sales of assets			0		0
Other Individually Immaterial Operating Segments | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	190		180	424	340
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(174)		(177)	(361)	(289)
Cost, Depreciation, Amortization and Depletion	15		11	31	21
Selling, general and administrative expenses	0		0	0	0
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	1		(10)	32	28
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		(7)	7	7
Net income (loss) attributable to noncontrolling interests	2		8	20	14
Total assets	1,890		1,843	1,890	1,843
Capital expenditures	26		33	65	56
Metals inventory adjustments	0		2	0	2
Net gain on sales of assets			0		0
Other Individually Immaterial Operating Segments | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	980		1,078	1,928	2,173
Other Individually Immaterial Operating Segments | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	0		0	0	0
Cerro Verde | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	783		702	1,741	1,808
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(609)		(565)	(1,229)	(1,123)
Cost, Depreciation, Amortization and Depletion	117		91	208	178
Selling, general and administrative expenses	(2)		(2)	(4)	(4)
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	230		169	719	736
Interest expense, net	55		4	84	7
Provision for (benefit from) income taxes	113		68	300	295
Net income (loss) attributable to noncontrolling interests	18		50	158	218
Total assets	8,444		8,379	8,444	8,379
Capital expenditures	57		35	118	68
Metals inventory adjustments	0		9	0	9
Net gain on sales of assets			0		0
Cerro Verde | Operating Segments | South America | Peruvian Supreme Court
Segment Reporting Information [Line Items]
Interest expense, net	50			74
Cerro Verde | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	175		134	419	242
Grasberg Segment
Segment Reporting Information [Line Items]
Capital expenditures				833	759
Grasberg Segment | Operating Segments | Indonesia
Segment Reporting Information [Line Items]
Revenues	2,039		1,920	3,238	4,246
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(858)		(564)	(1,193)	(1,190)
Cost, Depreciation, Amortization and Depletion	275		262	423	510
Selling, general and administrative expenses	(30)		(30)	(58)	(57)
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	1,074		1,122	1,931	2,625
Interest expense, net	13		13	22	15
Provision for (benefit from) income taxes	410		434	740	1,020
Net income (loss) attributable to noncontrolling interests	368		141	639	331
Total assets	20,460		20,679	20,460	20,679
Capital expenditures	384		388	833	759
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets			0		0
Grasberg Segment | Intersegment | Indonesia
Segment Reporting Information [Line Items]
Revenues	198		58	367	136
Molybdenum
Segment Reporting Information [Line Items]
Capital expenditures				22	9
Molybdenum | Operating Segments
Segment Reporting Information [Line Items]
Revenues	0		0	0	0
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(105)		(80)	(201)	(155)
Cost, Depreciation, Amortization and Depletion	14		18	34	34
Selling, general and administrative expenses	0		0	0	0
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	31		46	138	83
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	1,717		1,702	1,717	1,702
Capital expenditures	13		8	22	9
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets			0		0
Molybdenum | Intersegment
Segment Reporting Information [Line Items]
Revenues	150		144	373	272
Rod and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,463		1,753	2,986	3,496
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(1,465)		(1,765)	(2,992)	(3,519)
Cost, Depreciation, Amortization and Depletion	1		1	2	2
Selling, general and administrative expenses	0		0	0	0
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	7		(5)	8	(8)
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	280		300	280	300
Capital expenditures	2		2	7	4
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets			0		0
Rod and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	10		8	16	17
Atlantic Copper Smelting and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	744		433	1,493	1,151
Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization (Deprecated 2019-01-31)	(725)		(463)	(1,459)	(1,185)
Cost, Depreciation, Amortization and Depletion	7		6	14	12
Selling, general and administrative expenses	(7)		(5)	(15)	(13)
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	9		(41)	16	(59)
Interest expense, net	8		2	14	4
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	1,127		1,078	1,127	1,078
Capital expenditures	11		32	23	43
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets			0		0
Atlantic Copper Smelting and Refining Segment | Corporate And Eliminations
Segment Reporting Information [Line Items]
Cost, Maintenance					40
Atlantic Copper Smelting and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	4		0	11	0
Corporate And Eliminations | Intersegment
Segment Reporting Information [Line Items]
Revenues	$ (2,087)		$ (2,152)	(4,277)	(4,281)
Indonesia Smelter
Segment Reporting Information [Line Items]
Capital expenditures				$ 780	$ 344