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Guarantor Financial Statements (Unaudited) Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Current assets, other than assets held-for-sale | $ 9,045 | $ 10,720 |  |
Property, plant, equipment and mine development costs, net | 28,497 | 28,010 |  |
Investments in consolidated subsidiaries | 0 | 0 |  |
Other assets | 3,517 | 3,486 |  |
Total assets | 41,059 | 42,216 | $ 36,637 |
LIABILITIES AND EQUITY |  |  |  |
Current liabilities, other than liabilities held for sale | 3,247 | 3,329 |  |
Long-term debt, less current portion | 9,902 | 11,124 |  |
Deferred income taxes | 4,067 | 4,032 |  |
Environmental and asset retirement obligations, less current portion | 3,632 | 3,609 |  |
Investments in consolidated subsidiaries | 0 | 0 |  |
Other liabilities | 2,370 | 2,230 |  |
Total liabilities | 23,218 | 24,324 |  |
Equity: |  |  |  |
Stockholders' equity | 9,783 | 9,798 |  |
Noncontrolling interests | 8,058 | 8,094 |  |
Total equity | 17,841 | 17,892 | $ 11,926 | $ 11,296
Total liabilities and equity | 41,059 | 42,216 |  |
Eliminations [Member] |  |  |  |
ASSETS |  |  |  |
Current assets, other than assets held-for-sale | (525) | (585) |  |
Property, plant, equipment and mine development costs, net | 2 | 0 |  |
Investments in consolidated subsidiaries | (17,935) | (19,064) |  |
Other assets | (733) | (635) |  |
Total assets | (19,191) | (20,284) |  |
LIABILITIES AND EQUITY |  |  |  |
Current liabilities, other than liabilities held for sale | (561) | (617) |  |
Long-term debt, less current portion | (11,261) | (11,103) |  |
Deferred income taxes | 0 | 0 |  |
Environmental and asset retirement obligations, less current portion | 0 | 0 |  |
Investments in consolidated subsidiaries | (11,208) | (11,091) |  |
Other liabilities | (3,486) | (3,486) |  |
Total liabilities | (26,516) | (26,297) |  |
Equity: |  |  |  |
Stockholders' equity | 1,913 | 601 |  |
Noncontrolling interests | 5,412 | 5,412 |  |
Total equity | 7,325 | 6,013 |  |
Total liabilities and equity | (19,191) | (20,284) |  |
FCX Issuer [Member] | Reportable Legal Entities [Member] |  |  |  |
ASSETS |  |  |  |
Current assets, other than assets held-for-sale | 253 | 309 |  |
Property, plant, equipment and mine development costs, net | 19 | 19 |  |
Investments in consolidated subsidiaries | 17,935 | 19,064 |  |
Other assets | 977 | 880 |  |
Total assets | 19,184 | 20,272 |  |
LIABILITIES AND EQUITY |  |  |  |
Current liabilities, other than liabilities held for sale | 199 | 245 |  |
Long-term debt, less current portion | 8,595 | 9,594 |  |
Deferred income taxes | 519 | 524 |  |
Environmental and asset retirement obligations, less current portion | 0 | 0 |  |
Investments in consolidated subsidiaries | 0 | 0 |  |
Other liabilities | 88 | 111 |  |
Total liabilities | 9,401 | 10,474 |  |
Equity: |  |  |  |
Stockholders' equity | 9,783 | 9,798 |  |
Noncontrolling interests | 0 | 0 |  |
Total equity | 9,783 | 9,798 |  |
Total liabilities and equity | 19,184 | 20,272 |  |
FM O&G LLC Guarantor [Member] | Reportable Legal Entities [Member] |  |  |  |
ASSETS |  |  |  |
Current assets, other than assets held-for-sale | 516 | 620 |  |
Property, plant, equipment and mine development costs, net | 6 | 7 |  |
Investments in consolidated subsidiaries | 0 | 0 |  |
Other assets | 23 | 23 |  |
Total assets | 545 | 650 |  |
LIABILITIES AND EQUITY |  |  |  |
Current liabilities, other than liabilities held for sale | 30 | 34 |  |
Long-term debt, less current portion | 7,005 | 6,984 |  |
Deferred income taxes | 0 | 0 |  |
Environmental and asset retirement obligations, less current portion | 230 | 227 |  |
Investments in consolidated subsidiaries | 574 | 578 |  |
Other liabilities | 3,340 | 3,340 |  |
Total liabilities | 11,179 | 11,163 |  |
Equity: |  |  |  |
Stockholders' equity | (10,634) | (10,513) |  |
Noncontrolling interests | 0 | 0 |  |
Total equity | (10,634) | (10,513) |  |
Total liabilities and equity | 545 | 650 |  |
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |  |
ASSETS |  |  |  |
Current assets, other than assets held-for-sale | 8,801 | 10,376 |  |
Property, plant, equipment and mine development costs, net | 28,470 | 27,984 |  |
Investments in consolidated subsidiaries | 0 | 0 |  |
Other assets | 3,250 | 3,218 |  |
Total assets | 40,521 | 41,578 |  |
LIABILITIES AND EQUITY |  |  |  |
Current liabilities, other than liabilities held for sale | 3,579 | 3,667 |  |
Long-term debt, less current portion | 5,563 | 5,649 |  |
Deferred income taxes | 3,548 | 3,508 |  |
Environmental and asset retirement obligations, less current portion | 3,402 | 3,382 |  |
Investments in consolidated subsidiaries | 10,634 | 10,513 |  |
Other liabilities | 2,428 | 2,265 |  |
Total liabilities | 29,154 | 28,984 |  |
Equity: |  |  |  |
Stockholders' equity | 8,721 | 9,912 |  |
Noncontrolling interests | 2,646 | 2,682 |  |
Total equity | 11,367 | 12,594 |  |
Total liabilities and equity | $ 40,521 | $ 41,578 |  |

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