Business Segments (Segment Reporting) (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment				4
Revenues	$ 5,824		$ 5,003	$ 16,950	$ 17,022
Production and delivery	3,548		3,366	10,260	9,519
Cost, Depreciation, Amortization and Depletion	533		508	1,479	1,504
Selling, general and administrative expenses	118		98	359	313
Mining exploration and research expenses	30		38	103	87
Environmental obligations and shutdown costs	98		6	239	51
Operating income	1,492		962	4,503	5,507
Interest expense, net	96		140	418	423
Provision for (benefit from) income taxes	508		315	1,546	1,710
Net income (loss) attributable to noncontrolling interests	510		156	1,284	731
Total assets	51,648		49,927	51,648	49,927	$ 51,093
Capital expenditures	1,178		836	3,462	2,422
Metals inventory adjustments	5		25	7	43
Net gain on sales of assets	0		0	0	(2)
Net gain on early extinguishment of debt	5		20	10	28
Other Nonoperating Income (Expense)	71		25	183	67
Equity in affiliated companies’ net earnings	$ 0		8	$ 12	33
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%
FCX
Segment Reporting Information [Line Items]
Dividends Receivable, Percentage	81.00%	81.00%
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	$ 39		92	$ 208	284
Production and delivery	1,275		1,144	3,603	3,279
Cost, Depreciation, Amortization and Depletion	110		100	312	307
Selling, general and administrative expenses	1		1	3	3
Mining exploration and research expenses	1		0	2	1
Environmental obligations and shutdown costs	4		1	26	(12)
Operating income	262		199	966	1,666
Interest expense, net	1		1	1	1
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	8,970		8,452	8,970	8,452
Capital expenditures	167		154	545	430
Metals inventory adjustments	4		3	5	10
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	(11)		(8)	(12)	(33)
Equity in affiliated companies’ net earnings	0		0	0	0
Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	1,025		881	3,190	3,029
Production and delivery	826		800	2,416	2,212
Cost, Depreciation, Amortization and Depletion	111		98	350	297
Selling, general and administrative expenses	3		2	7	6
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	303		42	1,054	806
Interest expense, net	(10)		5	74	12
Provision for (benefit from) income taxes	131		(15)	438	287
Net income (loss) attributable to noncontrolling interests	98		40	276	272
Total assets	10,120		10,216	10,120	10,216
Capital expenditures	76		79	259	203
Metals inventory adjustments	1		22	1	33
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	4		(16)	(25)	1
Equity in affiliated companies’ net earnings	0		0	0	0
Corporate And Eliminations
Segment Reporting Information [Line Items]
Revenues	472		264	1,547	1,050
Production and delivery	(1,586)		(1,389)	(4,637)	(4,832)
Cost, Depreciation, Amortization and Depletion	18		18	50	50
Selling, general and administrative expenses	76		63	238	202
Mining exploration and research expenses	29		38	101	86
Environmental obligations and shutdown costs	94		5	213	63
Operating income	(228)		(121)	(765)	(448)
Interest expense, net	87		115	289	372
Provision for (benefit from) income taxes	(42)		(13)	(51)	60
Net income (loss) attributable to noncontrolling interests	20		11	(23)	23
Total assets	8,327		7,764	8,327	7,764
Capital expenditures	451		188	1,289	559
Metals inventory adjustments	0		0	1	0
Net gain on sales of assets					(2)
Net gain on early extinguishment of debt	5		20	10	38
Other Nonoperating Income (Expense)	43		20	130	45
Equity in affiliated companies’ net earnings	2		1	3	6
Intersegment
Segment Reporting Information [Line Items]
Revenues	0		0	0	0
Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	1,618		1,356	4,709	4,970
Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	219		83	638	325
PT Smelting | Affiliated Entity [Member]
Segment Reporting Information [Line Items]
Revenues			572	27	2,300
Morenci | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	17		18	75	125
Production and delivery	476		408	1,279	1,168
Cost, Depreciation, Amortization and Depletion	47		44	132	132
Selling, general and administrative expenses	0		0	1	1
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	(13)
Operating income	114		115	445	827
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	3,171		2,996	3,171	2,996
Capital expenditures	53		71	176	207
Metals inventory adjustments	4		2	5	2
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	(2)		0	(4)	(1)
Equity in affiliated companies’ net earnings	0		0	0	0
Morenci | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	624		551	1,787	1,992
Other Individually Immaterial Operating Segments | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	22		74	133	159
Production and delivery	799		736	2,324	2,111
Cost, Depreciation, Amortization and Depletion	63		56	180	175
Selling, general and administrative expenses	1		1	2	2
Mining exploration and research expenses	1		0	2	1
Environmental obligations and shutdown costs	4		1	26	1
Operating income	148		84	521	839
Interest expense, net	1		1	1	1
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	5,799		5,456	5,799	5,456
Capital expenditures	114		83	369	223
Metals inventory adjustments	0		1	0	8
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	(9)		(8)	(8)	(32)
Equity in affiliated companies’ net earnings	0		0	0	0
Other Individually Immaterial Operating Segments | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	203		215	627	555
Production and delivery	178		221	539	510
Cost, Depreciation, Amortization and Depletion	17		14	48	35
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	8		(40)	40	(12)
Interest expense, net	0		0	0	0
Provision for (benefit from) income taxes	12		(18)	19	(11)
Net income (loss) attributable to noncontrolling interests	14		11	34	25
Total assets	1,893		1,826	1,893	1,826
Capital expenditures	15		38	80	94
Metals inventory adjustments	0		20	0	22
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	13		5	11	12
Equity in affiliated companies’ net earnings	0		0	0	0
Other Individually Immaterial Operating Segments | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	994		805	2,922	2,978
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	822		666	2,563	2,474
Production and delivery	648		579	1,877	1,702
Cost, Depreciation, Amortization and Depletion	94		84	302	262
Selling, general and administrative expenses	3		2	7	6
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	295		82	1,014	818
Interest expense, net	(10)		5	74	12
Provision for (benefit from) income taxes	119		3	419	298
Net income (loss) attributable to noncontrolling interests	84		29	242	247
Total assets	8,227		8,390	8,227	8,390
Capital expenditures	61		41	179	109
Metals inventory adjustments	1		2	1	11
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	(9)		(21)	(36)	(11)
Equity in affiliated companies’ net earnings	0		0	0	0
Credit for settlement of interest	(13)			(13)
Cerro Verde | Operating Segments | South America | Peruvian Supreme Court
Segment Reporting Information [Line Items]
Interest expense, net				74
Cerro Verde | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	219		83	638	325
Grasberg Segment
Segment Reporting Information [Line Items]
Capital expenditures				1,274	1,148
Grasberg Segment | Operating Segments | Indonesia
Segment Reporting Information [Line Items]
Revenues	2,030		1,726	5,268	5,972
Production and delivery	667		663	1,860	1,853
Cost, Depreciation, Amortization and Depletion	271		265	694	775
Selling, general and administrative expenses	32		26	90	83
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	1,125		844	3,056	3,469
Interest expense, net	10		15	32	30
Provision for (benefit from) income taxes	419		343	1,159	1,363
Net income (loss) attributable to noncontrolling interests	392		105	1,031	436
Total assets	21,020		20,496	21,020	20,496
Capital expenditures	441		389	1,274	1,148
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	(10)
Other Nonoperating Income (Expense)	30		19	92	27
Equity in affiliated companies’ net earnings	(2)		7	9	27
Grasberg Segment | Intersegment | Indonesia
Segment Reporting Information [Line Items]
Revenues	65		72	432	208
Molybdenum
Segment Reporting Information [Line Items]
Capital expenditures				43	16
Molybdenum | Operating Segments
Segment Reporting Information [Line Items]
Revenues	0		0	0	0
Production and delivery	120		94	321	249
Cost, Depreciation, Amortization and Depletion	14		18	48	52
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	13		15	151	98
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	1,747		1,701	1,747	1,701
Capital expenditures	21		7	43	16
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	0		(1)	(1)	(1)
Equity in affiliated companies’ net earnings	0		0	0	0
Molybdenum | Intersegment
Segment Reporting Information [Line Items]
Revenues	147		127	520	399
Rod and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,566		1,436	4,552	4,932
Production and delivery	1,566		1,450	4,558	4,969
Cost, Depreciation, Amortization and Depletion	2		1	4	3
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	10		(8)	18	(16)
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	288		216	288	216
Capital expenditures	2		2	9	6
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	0		0	(1)	(1)
Equity in affiliated companies’ net earnings	0		0	0	0
Rod and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	12		7	28	24
Atlantic Copper Smelting and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	692		604	2,185	1,755
Production and delivery	680		604	2,139	1,789
Cost, Depreciation, Amortization and Depletion	7		8	21	20
Selling, general and administrative expenses	6		6	21	19
Mining exploration and research expenses	0		0	0	0
Environmental obligations and shutdown costs	0		0	0	0
Operating income	7		(9)	23	(68)
Interest expense, net	8		4	22	8
Provision for (benefit from) income taxes	0		0	0	0
Net income (loss) attributable to noncontrolling interests	0		0	0	0
Total assets	1,176		1,082	1,176	1,082
Capital expenditures	20		17	43	60
Metals inventory adjustments	0		0	0	0
Net gain on sales of assets					0
Net gain on early extinguishment of debt	0		0	0	0
Other Nonoperating Income (Expense)	5		11	0	29
Equity in affiliated companies’ net earnings	0		0	0	0
Atlantic Copper Smelting and Refining Segment | Corporate And Eliminations
Segment Reporting Information [Line Items]
Cost, Maintenance					41
Atlantic Copper Smelting and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	8		5	19	5
Corporate And Eliminations | Intersegment
Segment Reporting Information [Line Items]
Revenues	$ (2,069)		$ (1,650)	(6,346)	(5,931)
Indonesia Smelter
Segment Reporting Information [Line Items]
Capital expenditures				$ 1,193	$ 517