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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Footnotes) (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic |  | $ 0.72 |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Diluted |  | $ 0.71 | $ 0.19 | $ 0.18 | $ 0.16 |  |  |  |  | $ 1.25 |  |
Weighted Average Number of Shares Outstanding, Diluted |  | 1,455,000,000.00 | 1,454,000,000.00 | 1,453,000,000.00 | 1,454,000,000.00 | 1,410,000,000 | 1,351,000,000 | 1,269,000,000 | 1,251,000,000 | 1,454,000,000.00 | 1,318,000,000 | 1,082,000,000
Net (loss) income attributable to common stockholders |  | $ (1,041) | $ (280) | $ (268) | $ (228) | $ (292) | $ (217) | $ 479 | $ 4,184 | $ (1,817) | $ 4,154 | $ 12,236
Continuing operations (in dollars per share) |  |  |  |  |  | $ 0.22 | $ 0.18 | $ (0.23) | $ (3.34) | $ 1.21 | $ (2.96) | $ (11.32)
Income (Loss) from Continuing Operations, Per Basic Share |  | $ 0.71 |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations, Per Diluted Share |  | $ 0.70 | $ 0.19 | $ 0.18 | $ 0.13 |  |  |  |  | $ 1.21 |  |
Production and delivery |  |  |  |  |  |  |  |  |  | $ 10,300 | $ 10,697 | $ 10,693
Interest expense, net |  |  |  |  |  |  |  |  |  | (801) | (755) | (617)
Provision for (benefit from) income taxes |  |  |  |  |  |  |  |  |  | 883 | 371 | (1,951)
Net income from continuing operations attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  | (274) | (227) | (27)
Operating income (loss) |  | $ 1,467 | $ 917 | $ 669 | $ 580 | $ 703 | $ 359 | $ 18 | $ (3,872) | 3,633 | (2,792) | (13,512)
Environmental obligations and shutdown costs |  | 157 | 64 | (30) | 19 |  |  |  |  | 210 |  |
Net gain on sales of assets |  | 15 | 33 | 10 | 23 | (113) | 13 | 749 |  | 81 | 649 | 39
Net tax credits to net income attributable to common stockholders |  |  |  |  |  |  |  |  |  | $ 438 |  |
Earnings per share attributable to common stockholders related to Tax Reform (usd per share) |  |  |  |  |  |  |  |  |  | $ 0.30 |  |
Provisional net tax benefits associated with Tax Reform |  |  |  |  |  |  |  |  |  | $ 393 | 0 | 0
Impairment of oil and gas properties |  |  |  |  |  |  | 200 | 300 | 3,800 | $ 0 | $ 4,317 | $ 13,144
Impairment of oil and gas properties (usd per share) |  |  |  |  |  |  |  |  |  |  | $ 3.28 |
Oil and Gas Idle rig costs, inventory adjustments, asset impairments and other |  |  |  |  |  | 142 | 50 | 729 | $ 201 |  | $ 1,100 |
Oil and Gas Idle Rig Costs, Inventory Adjustments, Asset Impairments and Other, Amount per Share |  |  |  |  |  |  |  |  |  |  | $ 0.84 |
Net gains on sales of assets (usd per share) |  |  |  |  |  |  |  |  |  | $ 0.06 | $ 0.49 |
TF Holdings Limited | Disposed of by Sale, Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposal of discontinued operations |  |  |  |  |  | 16 | (5) | (177) |  |  | $ 198 |
Earnings per share related to disposal of discontinued operations (usd per share) |  |  |  |  |  |  |  |  |  |  | $ 0.15 |
Freeport-McMoRan Oil & Gas | Deepwater Gulf of Mexico and onshore California oil and gas properties |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain on redemption of preferred stock | $ 199 |  |  |  |  | 199 |  |  |  |  |  |
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee, Amount Per Share |  |  |  |  |  |  |  |  |  |  | $ 0.15 |
Cerro Verde Royalty Dispute | Royalty Assessments | Cerro Verde |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0 |  |
Production and delivery |  |  |  |  |  |  |  |  |  | $ 203 |  |
Interest expense, net |  |  |  |  |  |  |  |  |  | (145) |  |
Provision for (benefit from) income taxes |  |  |  |  |  |  |  |  |  | 7 |  |
Net income from continuing operations attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  | $ 169 |  |
One-time Termination Benefits | Grasberg Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.04 |  |
Production and delivery |  |  |  |  |  |  |  |  |  | $ 120 |  |
Net income from continuing operations attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  | 66 |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  | $ (125) |  |
One-time Termination Benefits | Grasberg Segment [Member] | Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Production and delivery |  | $ (8) | $ (9) | $ (87) | $ (21) |  |  |  |  |  |  |
Alternative minimum tax credits, changes to valuation allowances and net loss carryback [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.28 |  |
Net tax credits to net income attributable to common stockholders |  |  |  |  |  | $ 84 | $ 332 | $ (42) |  | $ 374 |  |
Site Remediation, Reclamation and Closure Costs |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.14 |  |
Judicial Ruling | Cerro Verde Royalty Dispute | Unfavorable Regulatory Actions |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Loss In Period, Attributable To Parent |  |  |  |  |  |  |  |  |  | $ 186 |  |

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