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Dispositions (Details) MMBTU in Thousands, bbl in Millions |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 14, 2016 USD ($) | Sep. 12, 2016 USD ($) | Aug. 01, 2016 | Jul. 25, 2016 USD ($) | Jun. 17, 2016 USD ($) | May 31, 2016 USD ($) | May 09, 2016 USD ($) | May 02, 2016 USD ($) | Dec. 31, 2016 MMBTU | Sep. 30, 2016 USD ($) $ / bbl $ / MMBTU | Jun. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 | Sep. 30, 2016 USD ($) $ / bbl $ / MMBTU bbl | Sep. 30, 2015 USD ($) | Dec. 31, 2016 USD ($) | May 30, 2016 | Dec. 31, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of additional interest in Morenci |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 996,000,000 |  | $ 0 |  |  |
Intersegment |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  | 0 |  | 0 |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total current assets held for sale |  |  |  |  |  |  |  |  |  |  | 4,663,000,000 |  |  | 4,868,000,000 |  |  | 4,663,000,000 |  | 4,868,000,000 |  |  | $ 744,000,000
Total long-term assets held for sale |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 4,124,000,000
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total current liabilities held for sale |  |  |  |  |  |  |  |  |  |  | 821,000,000 |  |  |  |  |  | 821,000,000 |  |  |  |  | 108,000,000
Total long-term liabilities held for sale |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 718,000,000
Noncontrolling interests |  |  |  |  |  |  |  |  |  |  | 4,334,000,000 |  |  |  |  |  | 4,334,000,000 |  |  |  |  | 4,216,000,000
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income from discontinued operations |  |  |  |  |  |  |  |  |  |  | $ (6,000,000) |  |  | 25,000,000 |  |  | $ (191,000,000) |  | 95,000,000 |  |  |
Morenci [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Ownership, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.00% |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Serbia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  |  |  |  |  |  |  | May 02, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of additional interest in Morenci |  |  |  |  |  |  |  |  | $ 135,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  |  | $ 107,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Timok [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Previously Unissued Stock by Subsidiary |  |  |  |  |  |  |  |  |  |  |  |  | $ 133,000,000 |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Morenci [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  |  |  |  |  | May 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of additional interest in Morenci |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Previously Unissued Stock by Subsidiary |  |  |  |  |  |  | $ 576,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Ownership, Percentage |  |  |  |  |  |  | 13.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  |  |  |  |  |  |  |  |  | 72.00% |  |  |  |  |  | 72.00% |  |  |  | 85.00% |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Morenci [Member] | Sumitomo Metal Mining Co., Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent Of Undivided Interest Owned By Third Party |  |  |  |  |  |  |  |  |  |  | 13.00% |  |  |  |  |  | 13.00% |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Morenci [Member] | Sumitomo Metal Mining Arizona Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent Of Undivided Interest Owned By Third Party |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  | 15.00% |  |  |  | 15.00% |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Oil and Gas Royalty Interests [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  |  |  |  | Jun. 17, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of additional interest in Morenci |  |  |  |  |  | $ 102,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Haynesville [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  |  |  | Jul. 25, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of additional interest in Morenci |  |  |  |  | $ 87,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Gulf of Mexico [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  | Sep. 12, 2016 | Aug. 01, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  | $ 582,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  | $ 2,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | $ 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  | Oct. 14, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations, Held-for-sale [Member] | Tenke Fungurume [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Date |  |  |  |  |  |  |  | May 09, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  | $ 120,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  |  |  |  |  |  | $ 2,650,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intersegment |  |  |  |  |  |  |  |  |  |  | $ (53,000,000) |  |  | (29,000,000) | $ 41,000,000 |  | $ (125,000,000) |  | (98,000,000) |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |  |  | 68,000,000 |  |  |  |  |  | 68,000,000 |  |  |  |  | 29,000,000
Inventories |  |  |  |  |  |  |  |  |  |  | 1,129,000,000 |  |  |  |  |  | 1,129,000,000 |  |  |  |  | 584,000,000
Receivables and other current assets |  |  |  |  |  |  |  |  |  |  | 140,000,000 |  |  |  |  |  | 140,000,000 |  |  |  |  | 131,000,000
Property, plant, equipment and mining development costs, net |  |  |  |  |  |  |  |  |  |  | 3,062,000,000 |  |  |  |  |  | 3,062,000,000 |  |  |  |  | 0
Other assets |  |  |  |  |  |  |  |  |  |  | 250,000,000 |  |  |  |  |  | 250,000,000 |  |  |  |  | 0
Total current assets held for sale |  |  |  |  |  |  |  |  |  |  | 4,649,000,000 |  |  |  |  |  | 4,649,000,000 |  |  |  |  | 744,000,000
Property, plant, equipment and mining development costs, net |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 3,261,000,000
Inventories |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 608,000,000
Other assets |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 241,000,000
Total long-term assets held for sale |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 4,110,000,000
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and accrued liabilities |  |  |  |  |  |  |  |  |  |  | 84,000,000 |  |  |  |  |  | 84,000,000 |  |  |  |  | 108,000,000
Deferred income taxes |  |  |  |  |  |  |  |  |  |  | 691,000,000 |  |  |  |  |  | 691,000,000 |  |  |  |  | 0
Asset retirement obligations and other liabilities |  |  |  |  |  |  |  |  |  |  | 46,000,000 |  |  |  |  |  | 46,000,000 |  |  |  |  | 0
Total current liabilities held for sale |  |  |  |  |  |  |  |  |  |  | 821,000,000 |  |  |  |  |  | 821,000,000 |  |  |  |  | 108,000,000
Deferred income taxes |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 681,000,000
Asset retirement obligations and other liabilities |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 37,000,000
Total long-term liabilities held for sale |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  | 718,000,000
Noncontrolling interests |  |  |  |  |  |  |  |  |  |  | 1,192,000,000 |  |  |  |  |  | 1,192,000,000 |  |  |  |  | $ 1,178,000,000
Net (Loss) Income from Discontinued Operations in the Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [1] |  |  |  |  |  |  |  |  |  | 261,000,000 |  |  | 299,000,000 |  |  | 819,000,000 |  | 991,000,000 |  |  |
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production and delivery costs |  |  |  |  |  |  |  |  |  |  | 248,000,000 |  |  | 207,000,000 |  |  | 730,000,000 |  | 637,000,000 |  |  |
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  | 0 | [2] |  | 65,000,000 |  |  | 80,000,000 | [2] | 195,000,000 |  |  |
Interest expense allocated from parent | [3] |  |  |  |  |  |  |  |  |  | 12,000,000 |  |  | 6,000,000 |  |  | 33,000,000 |  | 20,000,000 |  |  |
Other costs and expenses, net |  |  |  |  |  |  |  |  |  |  | 4,000,000 |  |  | 7,000,000 |  |  | 10,000,000 |  | 24,000,000 |  |  |
(Loss) income before income taxes and estimated loss on disposal |  |  |  |  |  |  |  |  |  |  | (3,000,000) |  |  | 14,000,000 |  |  | (34,000,000) |  | 115,000,000 |  |  |
Estimated loss on disposal | [4] |  |  |  |  |  |  |  |  |  | (5,000,000) |  |  | 0 |  |  | (182,000,000) |  | 0 |  |  |
Net (loss) income before income taxes |  |  |  |  |  |  |  |  |  |  | (8,000,000) |  |  | 14,000,000 |  |  | (216,000,000) |  | 115,000,000 |  |  |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  | 11,000,000 |  |  | 25,000,000 |  | (20,000,000) |  |  |
Net (loss) income from discontinued operations |  |  |  |  |  |  |  |  |  |  | $ (6,000,000) |  |  | $ 25,000,000 |  |  | $ (191,000,000) |  | $ 95,000,000 |  |  |
Discontinued Operations, Held-for-sale [Member] | Tenke Fungurume [Member] | Cobalt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  | 60,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration, Reference Price |  | 70 |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations, Held-for-sale [Member] | Tenke Fungurume [Member] | Copper [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  | 60,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration, Reference Price |  |  |  |  |  |  |  | $ 3.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations, Held-for-sale [Member] | Tenke Fungurume [Member] | Lundin Mining Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent Of Undivided Interest Owned By Third Party |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  | 30.00% |  |  |  |  |  |
Discontinued Operations, Held-for-sale [Member] | Tenke Fungurume [Member] | Tenke Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  |  |  |  |  |  |  |  |  |  |  | 56.00% |  |  | 56.00% |  |  |  |  |  |
Disposal Group, Not Discontinued Operations [Member] | Kokkola Cobalt Chemicals Refinery [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  |  |  |  |  |  |  |  |  | 56.00% |  |  |  |  |  | 56.00% |  |  |  |  |
Disposal Group, Not Discontinued Operations [Member] | Kokkola Cobalt Chemicals Refinery [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |
Disposal Group, Not Discontinued Operations [Member] | Kisanfu Exploration Project [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  | 100.00% |  |  |  |  |
Disposal Group, Not Discontinued Operations [Member] | Kisanfu Exploration Project [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |  |
Crude Oil [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2020 [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Onshore California [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Percent of Required Need, Coverage |  |  |  |  |  |  |  |  |  |  | 48.00% |  |  |  |  |  | 48.00% |  |  |  |  |
Derivative, Forward Price | $ / MMBTU |  |  |  |  |  |  |  |  |  |  | 3.1445 |  |  |  |  |  | 3.1445 |  |  |  |  |
Natural Gas [Member] | Commodity Contract [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  |  |  |  |  |  |  |  |  | 28,900 |  |  |  |  |  |  |  |  |  |  |  |
Crude Oil [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Percent of Required Need, Coverage |  |  |  |  |  |  |  |  |  |  | 72.00% |  |  |  |  |  | 72.00% |  |  |  |  |
Derivative, Forward Price | $ / bbl |  |  |  |  |  |  |  |  |  |  | 50.00 |  |  |  |  |  | 50.00 |  |  |  |  |
Crude Oil [Member] | Commodity Contract [Member] | Crude Oil and Natural Gas Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | bbl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19.4 |  |  |  |  |
Derivative, Forward Price | $ / bbl |  |  |  |  |  |  |  |  |  |  | 56.04 |  |  |  |  |  | 56.04 |  |  |  |  |
Crude Oil [Member] | Commodity Contract [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | bbl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.2 |  |  |  |  |
Derivative, Price Risk Option Strike Price | $ / bbl |  |  |  |  |  |  |  |  |  |  | 63.69 |  |  |  |  |  | 63.69 |  |  |  |  |
[1] | a.In accordance with accounting guidance, amounts are net of eliminations of intercompany sales totaling $53 million in third-quarter 2016, $29 million in third-quarter 2015, $125 million for the first nine months of 2016 and $98 million for the first nine months of 2015
[2] | b.In accordance with accounting guidance, depreciation, depletion and amortization is not recognized subsequent to classification as assets held for sale.
[3] | c.In accordance with accounting guidance, interest associated with FCX's Term Loan that will be required to be repaid as a result of the sale of TFHL has been allocated to discontinued operations.
[4] | d.In accordance with accounting guidance, an estimated loss on disposal was recorded, which will be adjusted through closing of the transaction.

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