Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

DEBT - Components of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt Instruments [Line Items]
Long-term Debt	$ 9,450	$ 9,711
Long-term Debt and Capital Lease Obligations, Repayments of Principal in Next Twelve Months	(372)	(34)
Long-term debt	9,078	9,677
4.00% Senior Notes Due 2021
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.00%
Senior Notes [Member] \| 3.55% Senior Notes Due 2022
Debt Instruments [Line Items]
Long-term Debt	$ 0	523
Debt Instrument, Interest Rate, Stated Percentage	3.55%
Senior Notes [Member] \| 3.875% Senior Notes due March 2023
Debt Instruments [Line Items]
Long-term Debt	$ 995	994
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Senior Notes [Member] \| senior notes 4.55 [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 728	728
Debt Instrument, Interest Rate, Stated Percentage	4.55%
Senior Notes [Member] \| Senior Notes due 2027, 5% [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 594	593
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Senior Notes [Member] \| Senior Notes Due 2028, 4.125% [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 693	691
Debt Instrument, Interest Rate, Stated Percentage	4.125%
Senior Notes [Member] \| Senior Notes Due 2028, 4.375%
Debt Instruments [Line Items]
Long-term Debt	$ 643	642
Debt Instrument, Interest Rate, Stated Percentage	4.375%
Senior Notes [Member] \| Senior Notes due 2029, 5.25% [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 593	593
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Senior Notes [Member] \| Senior Notes Due 2030, 4.25%
Debt Instruments [Line Items]
Long-term Debt	$ 593	592
Debt Instrument, Interest Rate, Stated Percentage	4.25%
Senior Notes [Member] \| Senior Notes Due 2030, 4.625%
Debt Instruments [Line Items]
Long-term Debt	$ 841	840
Debt Instrument, Interest Rate, Stated Percentage	4.625%
Senior Notes [Member] \| Senior Notes due 2034 5 point 4 percent [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 742	742
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Senior Notes [Member] \| 5.450% Senior Notes due March 2043 [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 1,846	$ 1,845
Debt Instrument, Interest Rate, Stated Percentage	5.45%
Senior Notes [Member] \| 6.125% Senior Notes due 2019 [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.125%
Senior Notes [Member] \| 3.100% Senior Notes due March 2020 [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Senior Notes [Member] \| 6.5% Senior Notes due 2020 [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%	6.50%
Senior Notes [Member] \| 6.625% Senior Notes due 2021 [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
Senior Notes [Member] \| 4.00% Senior Notes Due 2021
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Senior Notes [Member] \| 6.75% Senior Notes due 2022 [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.75%	6.75%
Senior Notes [Member] \| 6.875% Senior Notes due 2023
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.875%	6.875%
Other Debt [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 70	$ 49
Revolving Credit Facility [Member] \| Line of Credit [Member]
Debt Instruments [Line Items]
Long-term Debt	0	0
Cerro Verde \| Line of Credit [Member]
Debt Instruments [Line Items]
Long-term Debt	325	523
Freeport McMoRan Corporation [Member] \| Senior Notes [Member] \| Senior Notes Due 2031 [Member]
Debt Instruments [Line Items]
Long-term Debt	123	124
Freeport McMoRan Corporation [Member] \| Senior Notes [Member] \| Senior Notes Due 2034 [Member]
Debt Instruments [Line Items]
Long-term Debt	117	117
Freeport McMoRan Corporation [Member] \| Debentures [Member] \| Debentures Due 2027 [Member]
Debt Instruments [Line Items]
Long-term Debt	115	115
PT-FI \| Line of Credit [Member]
Debt Instruments [Line Items]
Long-term Debt	$ 432	$ 0