Business Segments (Segment Reporting) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Jan. 01, 2023
Segment Reporting Information [Line Items]
Revenues	$ 5,728	$ 6,321
Production and delivery	3,756	3,844
Depreciation, depletion and amortization (DD&A)	466	595
Selling, general and administrative expenses	154	144
Exploration and research expenses	39	37
Environmental obligations and shutdown costs	10	67
Operating income	1,303	1,634
Interest expense, net	70	89
Other Nonoperating Income (Expense)	58	129
Provision for (benefit from) income taxes	500	512
Equity in affiliated companies’ net earnings	2	0
Net income (loss) attributable to noncontrolling interests	441	689
Net loss attributable to common stockholders	352	473
Total assets	56,022	54,198	$ 54,848
Capital expenditures	1,172	1,254
PT Freeport Indonesia
Segment Reporting Information [Line Items]
Provision for (benefit from) income taxes		182
PT Freeport Indonesia | FCX
Segment Reporting Information [Line Items]
Noncontrolling interest, ownership percentage by parent			81.00%	48.76%
PT Freeport Indonesia | PT Indonesia Asahan Aluminium (Persero) (Inalum) [Member]
Segment Reporting Information [Line Items]
Noncontrolling interest, ownership percentage by parent			19.00%
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	191	77
Production and delivery	1,212	1,224
Depreciation, depletion and amortization (DD&A)	124	112
Selling, general and administrative expenses	1	1
Exploration and research expenses	12	12
Environmental obligations and shutdown costs	(7)	0
Operating income	288	153
Interest expense, net	0	0
Other Nonoperating Income (Expense)	2	(2)
Provision for (benefit from) income taxes	0	0
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	10,189	9,463
Capital expenditures	255	237
Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	1,129	1,034
Production and delivery	788	773
Depreciation, depletion and amortization (DD&A)	111	108
Selling, general and administrative expenses	2	2
Exploration and research expenses	4	4
Environmental obligations and shutdown costs	0	0
Operating income	471	249
Interest expense, net	4	5
Other Nonoperating Income (Expense)	31	24
Provision for (benefit from) income taxes	193	103
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	143	90
Total assets	10,239	10,035
Capital expenditures	85	82
Corporate And Eliminations
Segment Reporting Information [Line Items]
Revenues	468	400
Production and delivery	(1,300)	(1,270)
Depreciation, depletion and amortization (DD&A)	11	16
Selling, general and administrative expenses	115	101
Exploration and research expenses	21	19
Environmental obligations and shutdown costs	17	67
Operating income	(276)	(392)
Interest expense, net	46	73
Other Nonoperating Income (Expense)	14	63
Provision for (benefit from) income taxes	9	13
Equity in affiliated companies’ net earnings	(1)	2
Net income (loss) attributable to noncontrolling interests	23	(1)
Total assets	3,755	4,042
Capital expenditures	49	38
Oil And Gas Charges	109
Corporate And Eliminations | Miami Smelter
Segment Reporting Information [Line Items]
Production and delivery	73
Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0
Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	1,439	1,425
Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	247	102
Morenci | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	83	37
Production and delivery	419	459
Depreciation, depletion and amortization (DD&A)	50	48
Selling, general and administrative expenses	0	0
Exploration and research expenses	6	4
Environmental obligations and shutdown costs	(7)	0
Operating income	109	66
Interest expense, net	0	0
Other Nonoperating Income (Expense)	(1)	0
Provision for (benefit from) income taxes	0	0
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	3,239	3,148
Capital expenditures	59	44
Morenci | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	494	540
Other Individually Immaterial Operating Segments | Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	108	40
Production and delivery	793	765
Depreciation, depletion and amortization (DD&A)	74	64
Selling, general and administrative expenses	1	1
Exploration and research expenses	6	8
Environmental obligations and shutdown costs	0	0
Operating income	179	87
Interest expense, net	0	0
Other Nonoperating Income (Expense)	3	(2)
Provision for (benefit from) income taxes	0	0
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	6,950	6,315
Capital expenditures	196	193
Other Individually Immaterial Operating Segments | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	212	208
Production and delivery	201	170
Depreciation, depletion and amortization (DD&A)	20	16
Selling, general and administrative expenses	0	0
Exploration and research expenses	2	1
Environmental obligations and shutdown costs	0	0
Operating income	62	21
Interest expense, net	0	0
Other Nonoperating Income (Expense)	(1)	13
Provision for (benefit from) income taxes	22	12
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	17	14
Total assets	2,073	1,960
Capital expenditures	11	22
Other Individually Immaterial Operating Segments | Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	945	885
Other Individually Immaterial Operating Segments | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	73	0
Cerro Verde | Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	917	826
Production and delivery	587	603
Depreciation, depletion and amortization (DD&A)	91	92
Selling, general and administrative expenses	2	2
Exploration and research expenses	2	3
Environmental obligations and shutdown costs	0	0
Operating income	409	228
Interest expense, net	4	5
Other Nonoperating Income (Expense)	32	11
Provision for (benefit from) income taxes	171	91
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	126	76
Total assets	8,166	8,075
Capital expenditures	74	60
Cerro Verde | Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	174	102
Grasberg Segment | Operating Segments | Indonesia
Segment Reporting Information [Line Items]
Revenues	1,564	2,648
Production and delivery	578	861
Depreciation, depletion and amortization (DD&A)	186	335
Selling, general and administrative expenses	27	31
Exploration and research expenses	2	2
Environmental obligations and shutdown costs	0	0
Operating income	777	1,596
Interest expense, net	9	1
Other Nonoperating Income (Expense)	16	38
Provision for (benefit from) income taxes	288	409
Equity in affiliated companies’ net earnings	3	(2)
Net income (loss) attributable to noncontrolling interests	275	600
Total assets	28,006	27,162
Capital expenditures	704	842
Grasberg Segment | Intersegment | Indonesia
Segment Reporting Information [Line Items]
Revenues	6	177
Molybdenum
Segment Reporting Information [Line Items]
Capital expenditures	19	27
Molybdenum | Operating Segments
Segment Reporting Information [Line Items]
Revenues	0	0
Production and delivery	122	119
Depreciation, depletion and amortization (DD&A)	26	16
Selling, general and administrative expenses	0	0
Exploration and research expenses	0	0
Environmental obligations and shutdown costs	0	0
Operating income	29	10
Interest expense, net	0	0
Other Nonoperating Income (Expense)	0	0
Provision for (benefit from) income taxes	0	0
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	2,021	1,885
Capital expenditures	19	27
Molybdenum | Intersegment
Segment Reporting Information [Line Items]
Revenues	177	145
Rod and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,624	1,489
Production and delivery	1,622	1,487
Depreciation, depletion and amortization (DD&A)	1	1
Selling, general and administrative expenses	0	0
Exploration and research expenses	0	0
Environmental obligations and shutdown costs	0	0
Operating income	9	11
Interest expense, net	0	0
Other Nonoperating Income (Expense)	0	0
Provision for (benefit from) income taxes	0	0
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	364	257
Capital expenditures	17	5
Rod and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	8	10
Atlantic Copper Smelting and Refining Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	752	673
Production and delivery	734	650
Depreciation, depletion and amortization (DD&A)	7	7
Selling, general and administrative expenses	9	9
Exploration and research expenses	0	0
Environmental obligations and shutdown costs	0	0
Operating income	5	7
Interest expense, net	11	10
Other Nonoperating Income (Expense)	(5)	6
Provision for (benefit from) income taxes	10	(13)
Equity in affiliated companies’ net earnings	0	0
Net income (loss) attributable to noncontrolling interests	0	0
Total assets	1,448	1,354
Capital expenditures	43	23
Atlantic Copper Smelting and Refining Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	3	0
Corporate And Eliminations | Intersegment
Segment Reporting Information [Line Items]
Revenues	$ (1,880)	$ (1,859)