Business Segments (Segment Reporting) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 01, 2024	Aug. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 6,790	$ 5,824	$ 19,735	$ 16,950
Production and delivery	4,077	3,553	11,796	10,267
Depreciation, depletion and amortization (DD&A)	600	533	1,704	1,479
Selling, general and administrative expenses	117	118	384	359
Exploration and research expenses	38	30	115	103
Environmental obligations and shutdown costs	20	98	115	239
Operating income	1,938	1,492	5,621	4,503
Interest expense, net	72	96	249	418
Net gain on early extinguishment of debt	0	5	0	10
Other Nonoperating Income (Expense)	97	71	295	183
Provision for (benefit from) income taxes	737	508	2,003	1,546
Equity in affiliated companies’ net earnings	10	0	14	12
Net income (loss) attributable to noncontrolling interests	710	510	2,063	1,284
Total assets	55,400	51,648	55,400	51,648			$ 52,506
Capital expenditures	1,199	1,178	3,569	3,462
Cerro Verde
Segment Reporting Information [Line Items]
Investment owned, percent					55.08%	53.56%
PT Freeport Indonesia
Segment Reporting Information [Line Items]
Provision for (benefit from) income taxes	182
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	52	39	152	208
Production and delivery	1,303	1,279	3,678	3,608
Depreciation, depletion and amortization (DD&A)	109	110	327	312
Selling, general and administrative expenses	1	1	3	3
Exploration and research expenses	8	6	34	43
Environmental obligations and shutdown costs	0	4	0	26
Operating income	170	257	587	925
Interest expense, net	0	1	1	1
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	9	(11)	8	(12)
Provision for (benefit from) income taxes	0	0	0	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	9,819	8,970	9,819	8,970
Capital expenditures	263	167	743	545
Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	1,123	1,025	3,486	3,190
Production and delivery	817	827	2,450	2,417
Depreciation, depletion and amortization (DD&A)	110	111	332	350
Selling, general and administrative expenses	2	3	6	7
Exploration and research expenses	2	2	11	8
Environmental obligations and shutdown costs	0	0	0	0
Operating income	385	301	1,164	1,046
Interest expense, net	6	(10)	16	74
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	20	4	49	(25)
Provision for (benefit from) income taxes	158	131	475	438
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	126	98	380	276
Total assets	10,289	10,120	10,289	10,120
Capital expenditures	100	76	272	259
Corporate And Eliminations
Segment Reporting Information [Line Items]
Revenues	440	472	1,336	1,547
Production and delivery	(1,417)	(1,591)	(4,180)	(4,647)
Depreciation, depletion and amortization (DD&A)	14	18	47	50
Selling, general and administrative expenses	76	76	261	238
Exploration and research expenses	26	22	62	52
Environmental obligations and shutdown costs	20	94	115	213
Operating income	(286)	(216)	(764)	(705)
Interest expense, net	46	88	187	293
Net gain on early extinguishment of debt		5		10
Other Nonoperating Income (Expense)	34	43	128	132
Provision for (benefit from) income taxes	(47)	(42)	15	(51)
Equity in affiliated companies’ net earnings	4	2	7	3
Net income (loss) attributable to noncontrolling interests	(17)	20	19	(23)
Total assets	4,078	4,909	4,078	4,909
Capital expenditures	63	38	152	96
Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	1,539	1,618	4,477	4,709
Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	193	219	477	638
Morenci | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	40	17	90	75
Production and delivery	492	480	1,389	1,284
Depreciation, depletion and amortization (DD&A)	47	47	140	132
Selling, general and administrative expenses	0	0	1	1
Exploration and research expenses	4	2	13	8
Environmental obligations and shutdown costs	0	0	0	0
Operating income	50	112	227	437
Interest expense, net	0	0	0	0
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	(1)	(2)	(1)	(4)
Provision for (benefit from) income taxes	0	0	0	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	3,172	3,171	3,172	3,171
Capital expenditures	48	53	139	176
Morenci | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	553	624	1,680	1,787
Other Individually Immaterial Operating Segments | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	12	22	62	133
Production and delivery	811	799	2,289	2,324
Depreciation, depletion and amortization (DD&A)	62	63	187	180
Selling, general and administrative expenses	1	1	2	2
Exploration and research expenses	4	4	21	35
Environmental obligations and shutdown costs	0	4	0	26
Operating income	120	145	360	488
Interest expense, net	0	1	1	1
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	10	(9)	9	(8)
Provision for (benefit from) income taxes	0	0	0	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	6,647	5,799	6,647	5,799
Capital expenditures	215	114	604	369
Other Individually Immaterial Operating Segments | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	237	203	699	627
Production and delivery	187	178	538	539
Depreciation, depletion and amortization (DD&A)	18	17	51	48
Selling, general and administrative expenses	0	0	0	0
Exploration and research expenses	(1)	0	2	2
Environmental obligations and shutdown costs	0	0	0	0
Operating income	33	8	108	38
Interest expense, net	0	0	0	0
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	(2)	13	11	11
Provision for (benefit from) income taxes	10	12	45	19
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	12	14	48	34
Total assets	2,013	1,893	2,013	1,893
Capital expenditures	18	15	63	80
Other Individually Immaterial Operating Segments | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	986	994	2,797	2,922
Other Individually Immaterial Operating Segments | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Cerro Verde | Cerro Verde
Segment Reporting Information [Line Items]
Interest expense, net		(13)		(13)
Cerro Verde | Peruvian Supreme Court
Segment Reporting Information [Line Items]
Interest expense, net				(74)
Cerro Verde | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	886	822	2,787	2,563
Production and delivery	630	649	1,912	1,878
Depreciation, depletion and amortization (DD&A)	92	94	281	302
Selling, general and administrative expenses	2	3	6	7
Exploration and research expenses	3	2	9	6
Environmental obligations and shutdown costs	0	0	0	0
Operating income	352	293	1,056	1,008
Interest expense, net	6	(10)	16	74
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	22	(9)	38	(36)
Provision for (benefit from) income taxes	148	119	430	419
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	114	84	332	242
Total assets	8,276	8,227	8,276	8,227
Capital expenditures	82	61	209	179
Labor-related charges	34		99
Cerro Verde | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	193	219	477	638
Grasberg Segment
Segment Reporting Information [Line Items]
Capital expenditures			1,198	1,209
Grasberg Segment | Operating Segments | Indonesia
Segment Reporting Information [Line Items]
Revenues	2,856	2,030	7,689	5,268
Production and delivery	918	672	2,451	1,871
Depreciation, depletion and amortization (DD&A)	340	271	923	694
Selling, general and administrative expenses	32	32	93	90
Exploration and research expenses	2	0	8	0
Environmental obligations and shutdown costs	0	0	0	0
Operating income	1,690	1,120	4,600	3,045
Interest expense, net	10	9	17	28
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	42	30	110	90
Provision for (benefit from) income taxes	625	419	1,524	1,159
Equity in affiliated companies’ net earnings	6	(2)	7	9
Net income (loss) attributable to noncontrolling interests	601	392	1,664	1,031
Total assets	27,474	24,438	27,474	24,438
Capital expenditures	713	854	2,203	2,467
Administrative fine		55		55
Grasberg Segment | Intersegment | Indonesia
Segment Reporting Information [Line Items]
Revenues	126	65	386	432
Molybdenum
Segment Reporting Information [Line Items]
Capital expenditures			88	43
Molybdenum | Operating Segments
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Production and delivery	140	120	393	321
Depreciation, depletion and amortization (DD&A)	19	14	51	48
Selling, general and administrative expenses	0	0	0	0
Exploration and research expenses	0	0	0	0
Environmental obligations and shutdown costs	0	0	0	0
Operating income	(27)	13	(29)	151
Interest expense, net	0	0	0	0
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	0	0	0	(1)
Provision for (benefit from) income taxes	0	0	0	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	1,955	1,747	1,955	1,747
Capital expenditures	25	21	88	43
Molybdenum | Intersegment
Segment Reporting Information [Line Items]
Revenues	132	147	415	520
Rod and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,560	1,566	4,742	4,552
Production and delivery	1,562	1,566	4,741	4,558
Depreciation, depletion and amortization (DD&A)	2	2	4	4
Selling, general and administrative expenses	0	0	0	0
Exploration and research expenses	0	0	0	0
Environmental obligations and shutdown costs	0	0	0	0
Operating income	7	10	29	18
Interest expense, net	0	0	0	0
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	(1)	0	(1)	(1)
Provision for (benefit from) income taxes	0	0	0	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	294	288	294	288
Capital expenditures	7	2	23	9
Rod and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	11	12	32	28
Atlantic Copper Smelting and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	759	692	2,330	2,185
Production and delivery	754	680	2,263	2,139
Depreciation, depletion and amortization (DD&A)	6	7	20	21
Selling, general and administrative expenses	6	6	21	21
Exploration and research expenses	0	0	0	0
Environmental obligations and shutdown costs	0	0	0	0
Operating income	(1)	7	34	23
Interest expense, net	10	8	28	22
Net gain on early extinguishment of debt		0		0
Other Nonoperating Income (Expense)	(7)	5	1	0
Provision for (benefit from) income taxes	1	0	(11)	0
Equity in affiliated companies’ net earnings	0	0	0	0
Net income (loss) attributable to noncontrolling interests	0	0	0	0
Total assets	1,491	1,176	1,491	1,176
Capital expenditures	28	20	88	43
Atlantic Copper Smelting and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	6	8	8	19
Corporate And Eliminations | Intersegment
Segment Reporting Information [Line Items]
Revenues	$ (2,007)	$ (2,069)	$ (5,795)	$ (6,346)