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Debt (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Jun. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2015 | Dec. 31, 2016
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt and Capital Lease Obligations, Including Current Maturities | $ 15,363 |  |  |  | $ 16,027
Less current portion of long-term debt and short-term borrownings | (2,228) |  |  |  | (1,232)
Long-term debt | 13,135 |  |  |  | 14,795
Liabilities, Fair Value Adjustment | 171 |  |  |  | 179
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | 95 |  |  |  | 100
Revolving Credit Facility [Abstract] |  |  |  |  |
Interest Costs Incurred | 195 |  | $ 218 | $ 211 |
Other Debt, Including Capital Leases and Short Term Borrowings [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt and Capital Lease Obligations, Including Current Maturities | $ 5 |  |  |  | 5
Senior Notes Due 2017 2 Point 15 Percent [Member] | Senior Notes [Member] |  |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.15% |  |  |  |
Repayments of Debt | $ 500 |  |  |  |
FCX [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt, Gross | 13,242 |  |  |  | 13,745
Cerro Verde [Member] | Shareholder Loan [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt | 224 |  |  |  | 261
Freeport-McMoRan Oil & Gas | Senior Notes [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt, Gross | 267 |  |  |  | 267
Freeport McMoRan Corporation [Member] | Debentures [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt, Gross | 358 |  |  |  | 359
Line of Credit [Member] | Cerro Verde [Member] | Line of Credit [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt | 1,267 |  |  |  | $ 1,390
Letter of Credit [Member] | Line of Credit [Member] |  |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Long-term Line of Credit | 39 |  |  |  |
Revolving Credit Facility, Remaining Borrowing Capacity | 1,500 |  |  |  |
Revolving Credit Facility [Member] | Line of Credit [Member] |  |  |  |  |
Debt Instruments [Line Items] |  |  |  |  |
Long-term Debt | 0 |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Revolving Credit Facility, Remaining Borrowing Capacity | 3,500 |  |  |  |
Property, Plant and Equipment [Member] |  |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Interest Costs Capitalized | 28 |  | 20 |  |
Oil and Gas Properties [Member] |  |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Interest Costs Capitalized |  | $ 0 |  |  |
Oil and Gas Operations Segment [Member] | Oil and Gas Properties [Member] |  |  |  |  |
Revolving Credit Facility [Abstract] |  |  |  |  |
Interest Costs Capitalized | $ 0 |  | $ 7 |  |

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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- 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/presentationRef -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=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- 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://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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