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Business Segments (Unaudited) (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | May 30, 2016 | Dec. 31, 2015
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | $ 3,334 |  | $ 3,938 |  | $ 6,576 |  | $ 7,709 |  |  |
Intersegment |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Production and delivery |  |  | 2,956 |  | 2,651 |  | 5,455 |  | 5,330 |  |  |
Depreciation, depletion and amortization |  |  | 632 |  | 833 |  | 1,294 |  | 1,699 |  |  |
Impairment of oil and gas properties |  |  | 291 |  | 2,686 |  | 4,078 |  | 5,790 |  |  |
Selling, general and administrative expenses |  |  | 160 |  | 148 |  | 298 |  | 299 |  |  |
Mining exploration and research expenses |  |  | 15 |  | 30 |  | 33 |  | 57 |  |  |
Environmental obligations and shutdown costs |  |  | 11 |  | 11 |  | 21 |  | 24 |  |  |
Net gain on sales of assets |  |  | (749) |  | 0 |  | (749) |  | (39) |  |  |
Operating income (loss) |  |  | 18 |  | (2,421) |  | (3,854) |  | (5,451) |  |  |
Interest expense, net |  |  | 196 |  | 142 |  | 387 |  | 281 |  |  |
Provision for (benefit from) income taxes |  |  | 116 |  | (699) |  | 193 |  | (1,413) |  |  |
Total Assets |  |  | 41,296 |  | 54,008 |  | 41,296 |  | 54,008 |  |  | $ 46,577
Capital expenditures |  |  | 833 |  | 1,661 |  | 1,815 |  | 3,528 |  |  |
Restructuring Costs |  |  | (37) |  |  |  | 39 |  |  |  |  |
Disposal Group, Including Discontinued Operation, Assets |  |  | 4,700 |  | 4,900 |  | 4,700 |  | 4,900 |  |  |
Oil and gas inventory write downs |  |  | (2) |  | (59) |  | (7) |  | (63) |  |  |
Mining Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 2,924 | [1] | 3,369 | [1] | 5,871 | [2] | 6,640 | [2] |  |
Intersegment |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Production and delivery |  |  | 2,057 | [1] | 2,368 | [1] | 4,146 | [2] | 4,761 | [2] |  |
Depreciation, depletion and amortization |  |  | 410 | [1] | 345 | [1] | 814 | [2] | 677 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 32 | [1] | 37 | [1] | 57 | [2] | 75 | [2] |  |
Mining exploration and research expenses |  |  | 15 | [1] | 30 | [1] | 33 | [2] | 57 | [2] |  |
Environmental obligations and shutdown costs |  |  | 10 | [1] | 11 | [1] | 20 | [2] | 24 | [2] |  |
Net gain on sales of assets |  |  | (749) | [1] |  |  | (749) | [2] | (39) | [2] |  |
Operating income (loss) |  |  | 1,149 | [1] | 578 | [1] | 1,550 | [2] | 1,085 | [2] |  |
Interest expense, net |  |  | 44 | [1] | 42 | [1] | 91 | [2] | 87 | [2] |  |
Provision for (benefit from) income taxes |  |  | 61 | [1] | 101 | [1] | 136 | [2] | 154 | [2] |  |
Total Assets | [1] |  | 37,069 |  | 38,434 |  | 37,069 |  | 38,434 |  |  |
Capital expenditures |  |  | 441 | [1] | 855 | [1] | 900 | [2] | 1,689 | [2] |  |
North America Copper Mines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 122 | [1] | 272 | [1] | 340 | [2] | 493 | [2] |  |
Intersegment |  |  | 938 | [1] | 1,133 | [1] | 1,856 | [2] | 2,247 | [2] |  |
Production and delivery |  |  | 726 | [1] | 962 | [1] | 1,514 | [2] | 1,905 | [2] |  |
Depreciation, depletion and amortization |  |  | 134 | [1] | 139 | [1] | 278 | [2] | 272 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 2 | [1] | 2 | [1] | 3 | [2] | 3 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 2 | [1] | 1 | [2] | 5 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | (577) | [1] |  |  | (577) | [2] | (39) | [2] |  |
Operating income (loss) |  |  | 775 | [1] | 300 | [1] | 977 | [2] | 594 | [2] |  |
Interest expense, net |  |  | 1 | [1] | 1 | [1] | 2 | [2] | 2 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 7,636 |  | 9,388 |  | 7,636 |  | 9,388 |  |  |
Capital expenditures |  |  | 42 | [1] | 107 | [1] | 76 | [2] | 214 | [2] |  |
Morenci [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 79 | [1] | 180 | [1] | 241 | [2] | 286 | [2] |  |
Intersegment |  |  | 404 | [1] | 427 | [1] | 761 | [2] | 877 | [2] |  |
Production and delivery |  |  | 298 | [1] | 386 | [1] | 638 | [2] | 760 | [2] |  |
Depreciation, depletion and amortization |  |  | 57 | [1] | 55 | [1] | 119 | [2] | 106 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 1 | [1] | 0 | [1] | 1 | [2] | 1 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | (577) | [1] |  |  | (577) | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 704 | [1] | 166 | [1] | 821 | [2] | 296 | [2] |  |
Interest expense, net |  |  | 0 | [1] | 0 | [1] | 1 | [2] | 1 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 2,960 |  | 3,806 |  | 2,960 |  | 3,806 |  |  |
Capital expenditures |  |  | 37 | [1] | 79 | [1] | 65 | [2] | 163 | [2] |  |
Other North America Copper Mines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 43 | [1] | 92 | [1] | 99 | [2] | 207 | [2] |  |
Intersegment |  |  | 534 | [1] | 706 | [1] | 1,095 | [2] | 1,370 | [2] |  |
Production and delivery |  |  | 428 | [1] | 576 | [1],[3] | 876 | [2] | 1,145 | [2],[4] |  |
Depreciation, depletion and amortization |  |  | 77 | [1] | 84 | [1] | 159 | [2] | 166 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 1 | [1] | 2 | [1] | 2 | [2] | 2 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 2 | [1] | 1 | [2] | 5 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | (39) | [2] |  |
Operating income (loss) |  |  | 71 | [1] | 134 | [1] | 156 | [2] | 298 | [2] |  |
Interest expense, net |  |  | 1 | [1] | 1 | [1] | 1 | [2] | 1 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 4,676 |  | 5,582 |  | 4,676 |  | 5,582 |  |  |
Capital expenditures |  |  | 5 | [1] | 28 | [1] | 11 | [2] | 51 | [2] |  |
Oil and gas inventory write downs |  |  |  |  | (11) |  |  |  | (11) |  |  |
South America Mines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 617 | [1] | 416 | [1] | 1,247 | [2] | 895 | [2] |  |
Intersegment |  |  | 60 | [1] | 37 | [1] | 101 | [2] | 44 | [2] |  |
Production and delivery |  |  | 406 | [1] | 315 | [1] | 816 | [2] | 660 | [2] |  |
Depreciation, depletion and amortization |  |  | 136 | [1] | 72 | [1] | 268 | [2] | 147 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 2 | [1] | 1 | [1] | 4 | [2] | 2 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 133 | [1] | 65 | [1] | 260 | [2] | 130 | [2] |  |
Interest expense, net |  |  | 20 | [1] | 0 | [1] | 42 | [2] | 1 | [2] |  |
Provision for (benefit from) income taxes |  |  | 43 | [1] | 6 | [1] | 82 | [2] | 30 | [2] |  |
Total Assets | [1] |  | 10,939 |  | 10,502 |  | 10,939 |  | 10,502 |  |  |
Capital expenditures |  |  | 136 | [1] | 457 | [1] | 293 | [2] | 902 | [2] |  |
Cerro Verde [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 494 | [1] | 195 | [1] | 980 | [2] | 443 | [2] |  |
Intersegment |  |  | 60 | [1] | 37 | [1] | 101 | [2] | 51 | [2] |  |
Production and delivery |  |  | 303 | [1] | 165 | [1] | 594 | [2] | 363 | [2] |  |
Depreciation, depletion and amortization |  |  | 109 | [1] | 40 | [1] | 210 | [2] | 77 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 2 | [1] | 0 | [1] | 4 | [2] | 1 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 140 | [1] | 27 | [1] | 273 | [2] | 53 | [2] |  |
Interest expense, net |  |  | 20 | [1] | 0 | [1] | 42 | [2] | 1 | [2] |  |
Provision for (benefit from) income taxes |  |  | 45 | [1] | (5) | [1] | 90 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 9,330 |  | 8,567 |  | 9,330 |  | 8,567 |  |  |
Capital expenditures |  |  | 135 | [1] | 444 | [1] | 291 | [2] | 875 | [2] |  |
Other South America Mines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 123 | [1] | 221 | [1] | 267 | [2] | 452 | [2] |  |
Intersegment |  |  | 0 | [1] | 0 | [1] | 0 | [2] | (7) | [2],[5] |  |
Production and delivery |  |  | 103 | [1] | 150 | [1] | 222 | [2] | 297 | [2] |  |
Depreciation, depletion and amortization |  |  | 27 | [1] | 32 | [1] | 58 | [2] | 70 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 0 | [1] | 1 | [1] | 0 | [2] | 1 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | (7) | [1] | 38 | [1] | (13) | [2] | 77 | [2] |  |
Interest expense, net |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Provision for (benefit from) income taxes |  |  | (2) | [1] | 11 | [1] | (8) | [2] | 30 | [2] |  |
Total Assets | [1] |  | 1,609 |  | 1,935 |  | 1,609 |  | 1,935 |  |  |
Capital expenditures |  |  | 1 | [1] | 13 | [1] | 2 | [2] | 27 | [2] |  |
Indonesia - Grasberg [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 532 | [1],[6] | 792 | [1],[6] | 1,030 | [2],[7] | 1,413 | [2],[7] |  |
Intersegment |  |  | (1) | [1],[8] | (2) | [1],[8] | 57 | [2] | (16) | [2],[5] |  |
Production and delivery |  |  | 356 | [1] | 455 | [1] | 750 | [2] | 894 | [2] |  |
Depreciation, depletion and amortization |  |  | 93 | [1] | 78 | [1] | 174 | [2] | 148 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 22 | [1] | 25 | [1] | 36 | [2] | 50 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 60 | [1] | 232 | [1] | 127 | [2] | 305 | [2] |  |
Interest expense, net |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Provision for (benefit from) income taxes |  |  | 18 | [1] | 95 | [1] | 54 | [2] | 124 | [2] |  |
Total Assets | [1] |  | 9,550 |  | 8,959 |  | 9,550 |  | 8,959 |  |  |
Capital expenditures |  |  | 234 | [1] | 213 | [1] | 459 | [2] | 438 | [2] |  |
Molybdenum mines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Intersegment |  |  | 45 | [1] | 102 | [1] | 90 | [2] | 215 | [2] |  |
Production and delivery |  |  | 50 | [1] | 84 | [1],[3] | 102 | [2] | 167 | [2],[4] |  |
Depreciation, depletion and amortization |  |  | 17 | [1] | 25 | [1] | 36 | [2] | 51 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | (22) | [1] | (7) | [1] | (48) | [2] | (3) | [2] |  |
Interest expense, net |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 1,969 |  | 2,052 |  | 1,969 |  | 2,052 |  |  |
Capital expenditures |  |  | 0 | [1] | 4 | [1] | 1 | [2] | 7 | [2] |  |
Oil and gas inventory write downs |  |  |  |  | (3) |  |  |  | (3) |  |  |
Rod & Refining [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 919 | [1] | 1,089 | [1] | 1,890 | [2] | 2,151 | [2] |  |
Intersegment |  |  | 7 | [1] | 8 | [1] | 15 | [2] | 15 | [2] |  |
Production and delivery |  |  | 919 | [1] | 1,088 | [1] | 1,889 | [2] | 2,151 | [2] |  |
Depreciation, depletion and amortization |  |  | 3 | [1] | 3 | [1] | 5 | [2] | 5 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 4 | [1] | 6 | [1] | 11 | [2] | 10 | [2] |  |
Interest expense, net |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 217 |  | 286 |  | 217 |  | 286 |  |  |
Capital expenditures |  |  | 0 | [1] | 0 | [1] | 1 | [2] | 1 | [2] |  |
Atlantic Copper Smelting & Refining [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 493 | [1] | 495 | [1] | 915 | [2] | 1,035 | [2] |  |
Intersegment |  |  | 2 | [1] | 5 | [1] | 3 | [2] | 11 | [2] |  |
Production and delivery |  |  | 466 | [1] | 468 | [1] | 859 | [2] | 987 | [2] |  |
Depreciation, depletion and amortization |  |  | 7 | [1] | 9 | [1] | 15 | [2] | 19 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 4 | [1] | 4 | [1] | 8 | [2] | 9 | [2] |  |
Mining exploration and research expenses |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Environmental obligations and shutdown costs |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Net gain on sales of assets |  |  | 0 | [1] |  |  | 0 | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 18 | [1] | 19 | [1] | 36 | [2] | 31 | [2] |  |
Interest expense, net |  |  | 4 | [1] | 2 | [1] | 8 | [2] | 5 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1] |  | 607 |  | 786 |  | 607 |  | 786 |  |  |
Capital expenditures |  |  | 5 | [1] | 4 | [1] | 7 | [2] | 8 | [2] |  |
Other Mining & Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 241 | [1],[9] | 305 | [1],[9] | 449 | [2],[10] | 653 | [2],[10] |  |
Intersegment |  |  | (1,051) | [1] | (1,283) | [1] | (2,122) | [2] | (2,516) | [2] |  |
Production and delivery |  |  | (866) | [1] | (1,004) | [1],[3] | (1,784) | [2] | (2,003) | [2],[4] |  |
Depreciation, depletion and amortization |  |  | 20 | [1] | 19 | [1] | 38 | [2] | 35 | [2] |  |
Impairment of oil and gas properties |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Selling, general and administrative expenses |  |  | 2 | [1] | 5 | [1] | 6 | [2] | 11 | [2] |  |
Mining exploration and research expenses |  |  | 15 | [1] | 28 | [1] | 32 | [2] | 52 | [2] |  |
Environmental obligations and shutdown costs |  |  | 10 | [1] | 11 | [1] | 20 | [2] | 24 | [2] |  |
Net gain on sales of assets |  |  | (172) | [1] |  |  | (172) | [2] | 0 | [2] |  |
Operating income (loss) |  |  | 181 | [1] | (37) | [1] | 187 | [2] | 18 | [2] |  |
Interest expense, net |  |  | 19 | [1] | 39 | [1] | 39 | [2] | 79 | [2] |  |
Provision for (benefit from) income taxes |  |  | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2] |  |
Total Assets | [1],[11] |  | 6,151 |  | 6,461 |  | 6,151 |  | 6,461 |  |  |
Capital expenditures |  |  | 24 | [1],[12] | 70 | [1],[12] | 63 | [2],[13] | 119 | [2],[13] |  |
Oil and gas inventory write downs |  |  |  |  | (45) |  |  |  | (49) |  |  |
U.S. Oil & Gas Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 410 |  | 569 | [14] | 705 |  | 1,069 | [15] |  |
Intersegment |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Production and delivery |  |  | 889 | [16] | 281 | [16] | 1,296 | [17] | 564 | [17] |  |
Depreciation, depletion and amortization |  |  | 218 |  | 485 |  | 473 |  | 1,015 |  |  |
Impairment of oil and gas properties |  |  | 290 |  | 2,686 |  | 4,061 |  | 5,790 |  |  |
Selling, general and administrative expenses |  |  | 81 | [18] | 49 |  | 130 | [19] | 103 |  |  |
Mining exploration and research expenses |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Environmental obligations and shutdown costs |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Net gain on sales of assets |  |  | 0 |  |  |  | 0 |  | 0 |  |  |
Operating income (loss) |  |  | (1,068) |  | (2,932) |  | (5,255) |  | (6,403) |  |  |
Interest expense, net |  |  | 93 |  | 41 |  | 164 |  | 78 |  |  |
Provision for (benefit from) income taxes |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Total Assets |  |  | 3,902 |  | 15,393 |  | 3,902 |  | 15,393 |  |  |
Capital expenditures |  |  | 388 | [20] | 777 | [20] | 868 | [21] | 1,795 | [21] |  |
Oil and Gas Drillship settlement/Idle rig costs and inventory write downs |  |  | (692) |  | (22) |  | (892) |  | (39) |  |  |
Corporate, Other & Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Intersegment |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Production and delivery |  |  | 10 |  | 2 |  | 13 |  | 5 |  |  |
Depreciation, depletion and amortization |  |  | 4 |  | 3 |  | 7 |  | 7 |  |  |
Impairment of oil and gas properties |  |  | 1 | [22] | 0 |  | 17 | [23] | 0 |  |  |
Selling, general and administrative expenses |  |  | 47 |  | 62 |  | 111 |  | 121 |  |  |
Mining exploration and research expenses |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |
Environmental obligations and shutdown costs |  |  | 1 |  | 0 |  | 1 |  | 0 |  |  |
Net gain on sales of assets |  |  | 0 |  |  |  | 0 |  | 0 |  |  |
Operating income (loss) |  |  | (63) |  | (67) |  | (149) |  | (133) |  |  |
Interest expense, net |  |  | 59 |  | 59 |  | 132 |  | 116 |  |  |
Provision for (benefit from) income taxes |  |  | 55 |  | (800) |  | 57 |  | (1,567) |  |  |
Total Assets |  |  | 325 |  | 181 |  | 325 |  | 181 |  |  |
Capital expenditures |  |  | $ 4 |  | 29 |  | $ 47 |  | 44 |  |  |
Crude oil and natural gas swaps [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Net mark-to-market gains on derivative contracts |  |  |  |  | 6 |  |  |  | 58 |  |  |
Pt Smelting [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred Intercompany Profit, Percentage |  |  |  |  |  |  | 25.00% |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 25.00% |  |  |  | 25.00% |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  | $ 287 |  | 293 |  | $ 564 |  | 643 |  |  |
Morocco | Corporate, Other & Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditures | [20] |  | 4 |  | 29 |  | 47 |  | 44 |  |  |
Discontinued Operations, Held-for-sale [Member] | Other Mining & Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditures | [20] |  | $ 20 |  | $ 58 |  | $ 55 |  | $ 97 |  |  |
Morenci [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Change in Ownership, Percentage |  |  |  |  |  |  | 13.00% |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Morenci [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Change in Ownership, Percentage |  | 13.00% |  |  |  |  |  |  |  |  |  |
Percentage Of Undivided Interest Owned By Company |  |  | 72.00% |  |  |  | 72.00% |  |  |  | 85.00% |
[1] | Excludes the results of Tenke, which is reported as discontinued operations (refer to Note 2).
[2] | Excludes the results of Tenke, which is reported as discontinued operations (refer to Note 2).
[3] | Includes inventory adjustments totaling $11 million at other North America copper mines, $3 million at Molybdenum mines and $45 million at Other Mining & Eliminations.
[4] | Includes inventory adjustments totaling $11 million at other North America copper mines, $3 million at Molybdenum mines and $49 million at Other Mining & Eliminations for the first six months of 2015.
[5] | Reflects net reductions for provisional pricing adjustments to prior period open sales. There were no intersegment sales from El Abra or Grasberg for the first six months of 2015.
[6] | Includes PT-FI’s sales to PT Smelting totaling $287 million in second-quarter 2016 and $293 million in second-quarter 2015.
[7] | Includes PT-FI's sales to PT Smelting totaling $564 million for the first six months of 2016 and $643 million for the first six months of 2015.
[8] | Reflects net reductions for provisional pricing adjustments to prior period open sales. There were no intersegment sales from Grasberg in second-quarter 2016 or 2015.
[9] | Includes revenues from FCX's molybdenum sales company, which includes sales of molybdenum produced by the Molybdenum mines and by certain of the North and South America copper mines.
[10] | Includes revenues from FCX's molybdenum sales company, which includes sales of molybdenum produced by the Molybdenum mines and by certain of the North and South America copper mines.
[11] | Includes assets held for sale totaling $4.7 billion at June 30, 2016 and $4.9 billion at June 30, 2015, associated with discontinued operations (refer to Note 2).
[12] | Includes capital expenditures of $20 million in second-quarter 2016 and $58 million in second-quarter 2015 associated with discontinued operations.
[13] | Includes capital expenditures of $55 million for the first six months of 2016 and $97 million for the first six months of 2015 associated with discontinued operations.
[14] | Includes net mark-to-market gains of $6 million associated with crude oil derivative contracts.
[15] | Includes net mark-to-market gains of $58 million associated with crude oil derivative contracts.
[16] | Includes charges at oil and gas operations totaling $692 million in second-quarter 2016 and $22 million in second-quarter 2015, primarily associated with drillship settlement/idle rig costs and inventory write-downs.
[17] | Includes charges at oil and gas operations totaling $892 million for the first six months of 2016 and $39 million for the first six months of 2015, primarily associated with drillship settlement/idle rig costs and inventory write downs.
[18] | Includes $37 million for net restructuring charges.
[19] | Includes $39 million for net restructuring charges.
[20] | Excludes international oil and gas capital expenditures totaling $4 million in second-quarter 2016 and $29 million in second-quarter 2015, primarily related to the Morocco oil and gas properties, which are included in Corporate, Other & Eliminations.
[21] | Excludes international oil and gas capital expenditures totaling $47 million for the first six months of 2016 and $44 million for the first six months of 2015, primarily related to the Morocco oil and gas properties, which are included in Corporate, Other & Eliminations.
[22] | Reflects impairment charges for international oil and gas properties primarily in Morocco
[23] | Reflects impairment charges for international oil and gas properties primarily in Morocco.

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