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Business Segments (Unaudited) (Tables) | 6 Months Ended
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Jun. 30, 2016
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information By Segment | Financial Information by Business Segments
(In millions) | Mining Operations a |  |  |  |  |  |
| North America Copper Mines |  | South America |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Atlantic |  | Other |  |  |  |  |  | Corporate, |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  | Molyb- |  |  |  | Copper |  | Mining |  |  |  | U.S. |  | Other |  |
|  |  |  |  |  |  | Cerro |  |  |  |  |  |  |  | denum |  | Rod & |  | Smelting |  | & Elimi- |  | Total |  | Oil & Gas |  | & Elimi- |  | FCX
| Morenci |  | Other |  | Total |  | Verde |  | Other |  | Total |  | Grasberg |  | Mines |  | Refining |  | & Refining |  | nations |  | Mining |  | Operations |  | nations |  | Total
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 79 |  |  | $ | 43 |  |  | $ | 122 |  |  | $ | 494 |  |  | $ | 123 |  |  | $ | 617 |  |  | $ | 532 |  | b | $ | — |  |  | $ | 919 |  |  | $ | 493 |  |  | $ | 241 |  | c | $ | 2,924 |  |  | $ | 410 |  |  | $ | — |  |  | $ | 3,334 |
Intersegment | 404 |  |  | 534 |  |  | 938 |  |  | 60 |  |  | — |  |  | 60 |  |  | (1 | ) | d | 45 |  |  | 7 |  |  | 2 |  |  | (1,051 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 298 |  |  | 428 |  |  | 726 |  |  | 303 |  |  | 103 |  |  | 406 |  |  | 356 |  |  | 50 |  |  | 919 |  |  | 466 |  |  | (866 | ) |  | 2,057 |  |  | 889 |  | e | 10 |  |  | 2,956 |
Depreciation, depletion and amortization | 57 |  |  | 77 |  |  | 134 |  |  | 109 |  |  | 27 |  |  | 136 |  |  | 93 |  |  | 17 |  |  | 3 |  |  | 7 |  |  | 20 |  |  | 410 |  |  | 218 |  |  | 4 |  |  | 632 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 290 |  |  | 1 |  | f | 291 |
Selling, general and administrative expenses | 1 |  |  | 1 |  |  | 2 |  |  | 2 |  |  | — |  |  | 2 |  |  | 22 |  |  | — |  |  | — |  |  | 4 |  |  | 2 |  |  | 32 |  |  | 81 |  | g | 47 |  |  | 160 |
Mining exploration and research expenses | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 15 |  |  | 15 |  |  | — |  |  | — |  |  | 15 |
Environmental obligations and shutdown costs | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10 |  |  | 10 |  |  | — |  |  | 1 |  |  | 11 |
Net gain on sales of assets | (577 | ) |  | — |  |  | (577 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (172 | ) |  | (749 | ) |  | — |  |  | — |  |  | (749 | )
Operating income (loss) | 704 |  |  | 71 |  |  | 775 |  |  | 140 |  |  | (7 | ) |  | 133 |  |  | 60 |  |  | (22 | ) |  | 4 |  |  | 18 |  |  | 181 |  |  | 1,149 |  |  | (1,068 | ) |  | (63 | ) |  | 18 |
Interest expense, net | — |  |  | 1 |  |  | 1 |  |  | 20 |  |  | — |  |  | 20 |  |  | — |  |  | — |  |  | — |  |  | 4 |  |  | 19 |  |  | 44 |  |  | 93 |  |  | 59 |  |  | 196 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | 45 |  |  | (2 | ) |  | 43 |  |  | 18 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 61 |  |  | — |  |  | 55 |  |  | 116 |
Total assets at June 30, 2016 | 2,960 |  |  | 4,676 |  |  | 7,636 |  |  | 9,330 |  |  | 1,609 |  |  | 10,939 |  |  | 9,550 |  |  | 1,969 |  |  | 217 |  |  | 607 |  |  | 6,151 |  | h | 37,069 |  |  | 3,902 |  |  | 325 |  |  | 41,296 |
Capital expenditures | 37 |  |  | 5 |  |  | 42 |  |  | 135 |  |  | 1 |  |  | 136 |  |  | 234 |  |  | — |  |  | — |  |  | 5 |  |  | 24 |  | i | 441 |  |  | 388 |  | j | 4 |  |  | 833 |
Three Months Ended June 30, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 180 |  |  | $ | 92 |  |  | $ | 272 |  |  | $ | 195 |  |  | $ | 221 |  |  | $ | 416 |  |  | $ | 792 |  | b | $ | — |  |  | $ | 1,089 |  |  | $ | 495 |  |  | $ | 305 |  | c | $ | 3,369 |  |  | $ | 569 |  | k | $ | — |  |  | $ | 3,938 |
Intersegment | 427 |  |  | 706 |  |  | 1,133 |  |  | 37 |  |  | — |  |  | 37 |  |  | (2 | ) | d | 102 |  |  | 8 |  |  | 5 |  |  | (1,283 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 386 |  |  | 576 |  | l | 962 |  |  | 165 |  |  | 150 |  |  | 315 |  |  | 455 |  |  | 84 |  | l | 1,088 |  |  | 468 |  |  | (1,004 | ) | l | 2,368 |  |  | 281 |  | e | 2 |  |  | 2,651 |
Depreciation, depletion and amortization | 55 |  |  | 84 |  |  | 139 |  |  | 40 |  |  | 32 |  |  | 72 |  |  | 78 |  |  | 25 |  |  | 3 |  |  | 9 |  |  | 19 |  |  | 345 |  |  | 485 |  |  | 3 |  |  | 833 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,686 |  |  | — |  |  | 2,686 |
Selling, general and administrative expenses | — |  |  | 2 |  |  | 2 |  |  | — |  |  | 1 |  |  | 1 |  |  | 25 |  |  | — |  |  | — |  |  | 4 |  |  | 5 |  |  | 37 |  |  | 49 |  |  | 62 |  |  | 148 |
Mining exploration and research expenses | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 28 |  |  | 30 |  |  | — |  |  | — |  |  | 30 |
Environmental obligations and shutdown costs | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 11 |  |  | 11 |  |  | — |  |  | — |  |  | 11 |
Operating income (loss) | 166 |  |  | 134 |  |  | 300 |  |  | 27 |  |  | 38 |  |  | 65 |  |  | 232 |  |  | (7 | ) |  | 6 |  |  | 19 |  |  | (37 | ) |  | 578 |  |  | (2,932 | ) |  | (67 | ) |  | (2,421 | )
Interest expense, net | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | 39 |  |  | 42 |  |  | 41 |  |  | 59 |  |  | 142 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | (5 | ) |  | 11 |  |  | 6 |  |  | 95 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 101 |  |  | — |  |  | (800 | ) |  | (699 | )
Total assets at June 30, 2015 | 3,806 |  |  | 5,582 |  |  | 9,388 |  |  | 8,567 |  |  | 1,935 |  |  | 10,502 |  |  | 8,959 |  |  | 2,052 |  |  | 286 |  |  | 786 |  |  | 6,461 |  | h | 38,434 |  |  | 15,393 |  |  | 181 |  |  | 54,008 |
Capital expenditures | 79 |  |  | 28 |  |  | 107 |  |  | 444 |  |  | 13 |  |  | 457 |  |  | 213 |  |  | 4 |  |  | — |  |  | 4 |  |  | 70 |  | i | 855 |  |  | 777 |  | j | 29 |  |  | 1,661 |
a. | Excludes the results of Tenke, which is reported as discontinued operations (refer to Note 2).
b. | Includes PT-FI’s sales to PT Smelting totaling $287 million in second-quarter 2016 and $293 million in second-quarter 2015.
c. | 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.
d. | 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.
e. | 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.
f. | Reflects impairment charges for international oil and gas properties primarily in Morocco.
g. | Includes $37 million for net restructuring charges.
h. | 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).
i. | Includes capital expenditures of $20 million in second-quarter 2016 and $58 million in second-quarter 2015 associated with discontinued operations.
j. | 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.
k. | Includes net mark-to-market gains of $6 million associated with crude oil derivative contracts.
l. | Includes inventory adjustments totaling $11 million at other North America copper mines, $3 million at Molybdenum mines and $45 million at Other Mining & Eliminations.
(In millions) | Mining Operations a |  |  |  |  |  |
| North America Copper Mines |  | South America |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Atlantic |  | Other |  |  |  |  |  | Corporate, |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  | Molyb- |  |  |  | Copper |  | Mining |  |  |  | U.S. |  | Other |  |
|  |  |  |  |  |  | Cerro |  |  |  |  |  |  |  | denum |  | Rod & |  | Smelting |  | & Elimi- |  | Total |  | Oil & Gas |  | & Elimi- |  | FCX
| Morenci |  | Other |  | Total |  | Verde |  | Other |  | Total |  | Grasberg |  | Mines |  | Refining |  | & Refining |  | nations |  | Mining |  | Operations |  | nations |  | Total
Six Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 241 |  |  | $ | 99 |  |  | $ | 340 |  |  | $ | 980 |  |  | $ | 267 |  |  | $ | 1,247 |  |  | $ | 1,030 |  | b | $ | — |  |  | $ | 1,890 |  |  | $ | 915 |  |  | $ | 449 |  | c | $ | 5,871 |  |  | $ | 705 |  |  | $ | — |  |  | $ | 6,576 |
Intersegment | 761 |  |  | 1,095 |  |  | 1,856 |  |  | 101 |  |  | — |  |  | 101 |  |  | 57 |  |  | 90 |  |  | 15 |  |  | 3 |  |  | (2,122 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 638 |  |  | 876 |  |  | 1,514 |  |  | 594 |  |  | 222 |  |  | 816 |  |  | 750 |  |  | 102 |  |  | 1,889 |  |  | 859 |  |  | (1,784 | ) |  | 4,146 |  |  | 1,296 |  | d | 13 |  |  | 5,455 |
Depreciation, depletion and amortization | 119 |  |  | 159 |  |  | 278 |  |  | 210 |  |  | 58 |  |  | 268 |  |  | 174 |  |  | 36 |  |  | 5 |  |  | 15 |  |  | 38 |  |  | 814 |  |  | 473 |  |  | 7 |  |  | 1,294 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4,061 |  |  | 17 |  | e | 4,078 |
Selling, general and administrative expenses | 1 |  |  | 2 |  |  | 3 |  |  | 4 |  |  | — |  |  | 4 |  |  | 36 |  |  | — |  |  | — |  |  | 8 |  |  | 6 |  |  | 57 |  |  | 130 |  | f | 111 |  |  | 298 |
Mining exploration and research expenses | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 32 |  |  | 33 |  |  | — |  |  | — |  |  | 33 |
Environmental obligations and shutdown costs | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 20 |  |  | 20 |  |  | — |  |  | 1 |  |  | 21 |
Net gain on sales of assets | (577 | ) |  | — |  |  | (577 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (172 | ) |  | (749 | ) |  | — |  |  | — |  |  | (749 | )
Operating income (loss) | 821 |  |  | 156 |  |  | 977 |  |  | 273 |  |  | (13 | ) |  | 260 |  |  | 127 |  |  | (48 | ) |  | 11 |  |  | 36 |  |  | 187 |  |  | 1,550 |  |  | (5,255 | ) |  | (149 | ) |  | (3,854 | )
Interest expense, net | 1 |  |  | 1 |  |  | 2 |  |  | 42 |  |  | — |  |  | 42 |  |  | — |  |  | — |  |  | — |  |  | 8 |  |  | 39 |  |  | 91 |  |  | 164 |  |  | 132 |  |  | 387 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | 90 |  |  | (8 | ) |  | 82 |  |  | 54 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 136 |  |  | — |  |  | 57 |  |  | 193 |
Capital expenditures | 65 |  |  | 11 |  |  | 76 |  |  | 291 |  |  | 2 |  |  | 293 |  |  | 459 |  |  | 1 |  |  | 1 |  |  | 7 |  |  | 63 |  | g | 900 |  |  | 868 |  | h | 47 |  |  | 1,815 |
Six Months Ended June 30, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 286 |  |  | $ | 207 |  |  | $ | 493 |  |  | $ | 443 |  |  | $ | 452 |  |  | $ | 895 |  |  | $ | 1,413 |  | b | $ | — |  |  | $ | 2,151 |  |  | $ | 1,035 |  |  | $ | 653 |  | c | $ | 6,640 |  |  | $ | 1,069 |  | i | $ | — |  |  | $ | 7,709 |
Intersegment | 877 |  |  | 1,370 |  |  | 2,247 |  |  | 51 |  |  | (7 | ) | j | 44 |  |  | (16 | ) | j | 215 |  |  | 15 |  |  | 11 |  |  | (2,516 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 760 |  |  | 1,145 |  | k | 1,905 |  |  | 363 |  |  | 297 |  |  | 660 |  |  | 894 |  |  | 167 |  | k | 2,151 |  |  | 987 |  |  | (2,003 | ) | k | 4,761 |  |  | 564 |  | d | 5 |  |  | 5,330 |
Depreciation, depletion and amortization | 106 |  |  | 166 |  |  | 272 |  |  | 77 |  |  | 70 |  |  | 147 |  |  | 148 |  |  | 51 |  |  | 5 |  |  | 19 |  |  | 35 |  |  | 677 |  |  | 1,015 |  |  | 7 |  |  | 1,699 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,790 |  |  | — |  |  | 5,790 |
Selling, general and administrative expenses | 1 |  |  | 2 |  |  | 3 |  |  | 1 |  |  | 1 |  |  | 2 |  |  | 50 |  |  | — |  |  | — |  |  | 9 |  |  | 11 |  |  | 75 |  |  | 103 |  |  | 121 |  |  | 299 |
Mining exploration and research expenses | — |  |  | 5 |  |  | 5 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 52 |  |  | 57 |  |  | — |  |  | — |  |  | 57 |
Environmental obligations and shutdown costs | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 24 |  |  | 24 |  |  | — |  |  | — |  |  | 24 |
Net gain on sales of assets | — |  |  | (39 | ) |  | (39 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (39 | ) |  | — |  |  | — |  |  | (39 | )
Operating income (loss) | 296 |  |  | 298 |  |  | 594 |  |  | 53 |  |  | 77 |  |  | 130 |  |  | 305 |  |  | (3 | ) |  | 10 |  |  | 31 |  |  | 18 |  |  | 1,085 |  |  | (6,403 | ) |  | (133 | ) |  | (5,451 | )
Interest expense, net | 1 |  |  | 1 |  |  | 2 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 5 |  |  | 79 |  |  | 87 |  |  | 78 |  |  | 116 |  |  | 281 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | — |  |  | 30 |  |  | 30 |  |  | 124 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 154 |  |  | — |  |  | (1,567 | ) |  | (1,413 | )
Capital expenditures | 163 |  |  | 51 |  |  | 214 |  |  | 875 |  |  | 27 |  |  | 902 |  |  | 438 |  |  | 7 |  |  | 1 |  |  | 8 |  |  | 119 |  | g | 1,689 |  |  | 1,795 |  | h | 44 |  |  | 3,528 |
a. | Excludes the results of Tenke, which is reported as discontinued operations (refer to Note 2).
b. | 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.
c. | 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.
d. | 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.
e. | Reflects impairment charges for international oil and gas properties primarily in Morocco.
f. | Includes $39 million for net restructuring charges.
g. | 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.
h. | 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.
i. | Includes net mark-to-market gains of $58 million associated with crude oil derivative contracts.
j. | 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.
k. | 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.

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