COMMITMENTS AND GUARANTEES (Operating Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Operating Leased Assets And Liabilities [Line Items]
Operating Lease, Liability, Noncurrent	$ 281	$ 190
Lease right-of-use assets (included in property, plant, equipment and mine development costs, net)	277	207
Operating leases	42	42	$ 55
Variable and short-term leases	62	74	79
Total operating lease costs	104	116	134
Operating Lease, Payments	54	36	38
Finance Lease, Principal Payments	$ 25	$ 4	$ 4
Operating Lease, Weighted Average Discount Rate, Percent	4.20%	5.40%
Operating Lease, Weighted Average Remaining Lease Term	12 years 4 months 24 days	7 years 8 months 12 days
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 46
Lessee, Operating Lease, Liability, Payments, Due Year Two	35
Lessee, Operating Lease, Liability, Payments, Due Year Three	73
Lessee, Operating Lease, Liability, Payments, Due Year Four	27
Lessee, Operating Lease, Liability, Payments, Due Year Five	24
Lessee, Operating Lease, Liability, Payments, Due after Year Five	194
Lessee, Operating Lease, Liability, Payments, Due	399
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(80)
Operating Lease, Liability	319	$ 228
Operating Lease, Liability, Current	$ (38)	$ (38)
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, equipment and mine development costs, net	Property, plant, equipment and mine development costs, net
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
PT Freeport Indonesia
Schedule of Operating Leased Assets And Liabilities [Line Items]
Operating Lease, Liability, Noncurrent	$ 126