BUSINESS SEGMENTS INFORMATION (Segment Reporting) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 22,780	$ 22,845	$ 14,198
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	13,041	12,016	10,031
Depreciation, depletion and amortization	2,019	1,998	1,528
Metals inventory adjustments	29	16	96
Selling, general and administrative expenses	420	383	370
Mining exploration and research expenses	115	55	50
Environmental obligations and shutdown costs	121	91	159
Net gain on sales of assets	(2)	(80)	(473)
Operating income (loss)	7,037	8,366	2,437
Interest expense, net	560	602	598
Provision for (benefit from) income taxes	(2,267)	(2,299)	(944)
Total assets	51,093	48,022	42,144
Capital expenditures	3,469	2,115	1,961
Gain on Sale of Investments			486
Sale of Investment, Tax Expense			(135)
Settlements and revisions to cash flow estimates, net	381	331	(13)
Current Federal Tax Expense (Benefit)	0	0	53
Pt Freeport Indonesia Environmental And Reclamation Programs
Segment Reporting Information [Line Items]
Settlements and revisions to cash flow estimates, net	131	397
Covid-19 [Member]
Segment Reporting Information [Line Items]
Idle Facility Costs			258
Cerro Verde | Covid-19 [Member]
Segment Reporting Information [Line Items]
Idle Facility Costs			89
Grasberg Segment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,575	1,296	1,161
Molybdenum
Segment Reporting Information [Line Items]
Capital expenditures	33	6	19
Rod & Refining | Covid-19 [Member]
Segment Reporting Information [Line Items]
Idle Facility Costs			30
Indonesia
Segment Reporting Information [Line Items]
Revenues	3,026	3,132	1,760
Operating Segments | Molybdenum
Segment Reporting Information [Line Items]
Revenues	0	0	0
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	359	253	230
Depreciation, depletion and amortization	74	67	57
Metals inventory adjustments	0	1	10
Selling, general and administrative expenses	0	0	0
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	132	123	(75)
Interest expense, net	0	0	0
Provision for (benefit from) income taxes	0	0	0
Total assets	1,697	1,713	1,760
Capital expenditures	33	6	19
Operating Segments | Rod & Refining
Segment Reporting Information [Line Items]
Revenues	6,281	6,356	4,781
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	6,330	6,381	4,819
Depreciation, depletion and amortization	5	5	16
Metals inventory adjustments	0	0	3
Selling, general and administrative expenses	0	0	0
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	1
Net gain on sales of assets	0	0	0
Operating income (loss)	(23)	(1)	(25)
Interest expense, net	0	0	0
Provision for (benefit from) income taxes	0	0	0
Total assets	183	228	211
Capital expenditures	9	2	6
Operating Segments | Atlantic Copper Smelting & Refining
Segment Reporting Information [Line Items]
Revenues	2,439	2,961	2,020
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	2,452	2,907	1,962
Depreciation, depletion and amortization	27	28	29
Metals inventory adjustments	0	0	0
Selling, general and administrative expenses	25	24	21
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	(19)	0
Operating income (loss)	(61)	21	25
Interest expense, net	15	6	6
Provision for (benefit from) income taxes	1	0	(2)
Total assets	1,262	1,318	877
Capital expenditures	76	34	29
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenues	428	262	77
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	4,361	3,461	3,100
Depreciation, depletion and amortization	410	369	355
Metals inventory adjustments	16	13	52
Selling, general and administrative expenses	5	4	4
Mining exploration and research expenses	1	1	2
Environmental obligations and shutdown costs	(4)	(1)	(1)
Net gain on sales of assets	0	0	0
Operating income (loss)	1,921	2,978	852
Interest expense, net	2	1	2
Provision for (benefit from) income taxes	0	0	0
Total assets	8,604	7,916	7,737
Capital expenditures	597	342	428
Operating Segments | North America | Morenci
Segment Reporting Information [Line Items]
Revenues	175	82	29
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	1,542	1,226	1,269
Depreciation, depletion and amortization	177	152	166
Metals inventory adjustments	8	13	4
Selling, general and administrative expenses	2	2	2
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	(5)	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	965	1,417	603
Interest expense, net	1	0	2
Provision for (benefit from) income taxes	0	0	0
Total assets	3,052	2,708	2,574
Capital expenditures	263	135	102
Operating Segments | North America | Other
Segment Reporting Information [Line Items]
Revenues	253	180	48
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	2,819	2,235	1,831
Depreciation, depletion and amortization	233	217	189
Metals inventory adjustments	8	0	48
Selling, general and administrative expenses	3	2	2
Mining exploration and research expenses	1	1	2
Environmental obligations and shutdown costs	1	(1)	(1)
Net gain on sales of assets	0	0	0
Operating income (loss)	956	1,561	249
Interest expense, net	1	1	0
Provision for (benefit from) income taxes	0	0	0
Total assets	5,552	5,208	5,163
Capital expenditures	334	207	326
Operating Segments | South America
Segment Reporting Information [Line Items]
Revenues	4,212	4,456	2,713
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	3,061	2,429	1,978
Depreciation, depletion and amortization	408	413	421
Metals inventory adjustments	13	0	3
Selling, general and administrative expenses	8	8	6
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	1,228	2,066	547
Interest expense, net	15	28	139
Provision for (benefit from) income taxes	(453)	(820)	(239)
Total assets	10,271	10,615	10,152
Capital expenditures	304	162	183
Operating Segments | South America | Cerro Verde
Segment Reporting Information [Line Items]
Revenues	3,444	3,736	2,282
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	2,359	2,000	1,599
Depreciation, depletion and amortization	357	366	367
Metals inventory adjustments	10	0	0
Selling, general and administrative expenses	8	8	6
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	1,216	1,822	552
Interest expense, net	15	28	139
Provision for (benefit from) income taxes	(461)	(730)	(238)
Total assets	8,398	8,694	8,474
Capital expenditures	164	132	141
Labor and Related Expense		92
Operating Segments | South America | Other
Segment Reporting Information [Line Items]
Revenues	768	720	431
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	702	429	379
Depreciation, depletion and amortization	51	47	54
Metals inventory adjustments	3	0	3
Selling, general and administrative expenses	0	0	0
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	12	244	(5)
Interest expense, net	0	0	0
Provision for (benefit from) income taxes	8	(90)	(1)
Total assets	1,873	1,921	1,678
Capital expenditures	140	30	42
Operating Segments | Indonesia | Grasberg Segment [Member]
Segment Reporting Information [Line Items]
Revenues	8,028	7,241	3,534
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	2,684	2,425	1,606
Depreciation, depletion and amortization	1,025	1,049	580
Metals inventory adjustments	0	0	0
Selling, general and administrative expenses	117	111	108
Mining exploration and research expenses	0	0	0
Environmental obligations and shutdown costs	0	0	0
Net gain on sales of assets	0	0	0
Operating income (loss)	4,600	3,938	1,320
Interest expense, net	40	48	39
Provision for (benefit from) income taxes	(1,820)	(1,524)	(606)
Total assets	20,639	18,971	16,918
Capital expenditures	1,575	1,296	1,161
Operating Segments | Indonesia | Grasberg Segment [Member] | PT Smelting
Segment Reporting Information [Line Items]
Revenues	3,000	3,100	1,800
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	1,392	1,569	1,073
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	(6,206)	(5,840)	(3,664)
Depreciation, depletion and amortization	70	67	70
Metals inventory adjustments	0	2	28
Selling, general and administrative expenses	265	236	231
Mining exploration and research expenses	114	54	48
Environmental obligations and shutdown costs	125	92	159
Net gain on sales of assets	(2)	(61)	(473)
Operating income (loss)	(760)	(759)	(207)
Interest expense, net	488	519	412
Provision for (benefit from) income taxes	5	45	(97)
Total assets	8,437	7,261	4,489
Capital expenditures	875	273	135
Corporate And Eliminations [Member] | Freeport Cobalt
Segment Reporting Information [Line Items]
Net gain on sales of assets		(60)
Corporate And Eliminations [Member] | Covid-19 [Member]
Segment Reporting Information [Line Items]
Idle Facility Costs			57
Corporate And Eliminations [Member] | Atlantic Copper Smelting & Refining
Segment Reporting Information [Line Items]
Cost, Maintenance	41
Corporate And Eliminations [Member] | Miami smelter
Segment Reporting Information [Line Items]
Cost, Maintenance		87
Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0	0
Intersegment | Molybdenum
Segment Reporting Information [Line Items]
Revenues	565	444	222
Intersegment | Rod & Refining
Segment Reporting Information [Line Items]
Revenues	31	29	33
Intersegment | Atlantic Copper Smelting & Refining
Segment Reporting Information [Line Items]
Revenues	4	0	17
Intersegment | Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(7,786)	(7,778)	(4,881)
Intersegment | North America
Segment Reporting Information [Line Items]
Revenues	6,282	6,563	4,287
Intersegment | North America | Morenci
Segment Reporting Information [Line Items]
Revenues	2,514	2,728	2,015
Intersegment | North America | Other
Segment Reporting Information [Line Items]
Revenues	3,768	3,835	2,272
Intersegment | South America
Segment Reporting Information [Line Items]
Revenues	506	460	242
Intersegment | South America | Cerro Verde
Segment Reporting Information [Line Items]
Revenues	506	460	242
Intersegment | South America | Other
Segment Reporting Information [Line Items]
Revenues	0	0	0
Intersegment | Indonesia | Grasberg Segment [Member]
Segment Reporting Information [Line Items]
Revenues	398	282	80
Unfavorable Regulatory Actions | Operating Segments | Indonesia | Grasberg Segment [Member]
Segment Reporting Information [Line Items]
Provision for (benefit from) income taxes		189	(35)
Asbestos Contamination in Talc-Based Personal Care Products
Segment Reporting Information [Line Items]
Charge for talc-related litigation	0	0	130
Timok, Lower Zone [Member]
Segment Reporting Information [Line Items]
Current Federal Tax Expense (Benefit)		53	$ 53
Production and Delivery Costs [Member] | Pt Freeport Indonesia Environmental And Reclamation Programs
Segment Reporting Information [Line Items]
Settlements and revisions to cash flow estimates, net	$ 116	$ 340