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Business Segments (Unaudited) (Tables) | 9 Months Ended
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Sep. 30, 2015
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information By Segment | Financial Information by Business Segments
(In millions) | Mining Operations |  |  |  |  |  |
| North America Copper Mines |  | South America |  | Indonesia |  | Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Atlantic |  | Other |  |  |  |  |  | Corporate, |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Molyb- |  |  |  | Copper |  | Mining |  |  |  | U.S. |  | Other |  |
|  |  | Other |  |  |  | Cerro |  | Other |  |  |  |  |  |  |  | denum |  | Rod & |  | Smelting |  | & Elimi- |  | Total |  | Oil & Gas |  | & Elimi- |  | FCX
| Morenci |  | Mines |  | Total |  | Verde |  | Mines a |  | Total |  | Grasberg |  | Tenke |  | Mines |  | Refining |  | & Refining |  | nations |  | Mining |  | Operations |  | nations |  | Total
Three Months Ended September 30, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 165 |  |  | $ | 58 |  |  | $ | 223 |  |  | $ | 238 |  |  | $ | 187 |  |  | $ | 425 |  |  | $ | 557 |  | b | $ | 299 |  |  | $ | — |  |  | $ | 946 |  |  | $ | 438 |  |  | $ | 267 |  | c | $ | 3,155 |  |  | $ | 525 |  | d | $ | 1 |  |  | $ | 3,681 |
Intersegment | 332 |  |  | 614 |  |  | 946 |  |  | 13 |  |  | — |  |  | 13 |  |  | 52 |  |  | 29 |  |  | 83 |  |  | 5 |  |  | 1 |  |  | (1,129 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 357 |  |  | 671 |  |  | 1,028 |  | e | 177 |  |  | 167 |  | e | 344 |  |  | 417 |  |  | 209 |  |  | 86 |  | e | 946 |  |  | 410 |  |  | (842 | ) | e | 2,598 |  |  | 293 |  |  | 2 |  | e | 2,893 |
Depreciation, depletion and amortization | 51 |  |  | 85 |  |  | 136 |  |  | 57 |  |  | 32 |  |  | 89 |  |  | 90 |  |  | 65 |  |  | 26 |  |  | 2 |  |  | 10 |  |  | 16 |  |  | 434 |  |  | 450 |  |  | 4 |  |  | 888 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,480 |  |  | 172 |  | f | 3,652 |
Selling, general and administrative expenses | 1 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | 24 |  |  | 2 |  |  | — |  |  | — |  |  | 4 |  |  | 5 |  |  | 37 |  |  | 37 |  |  | 50 |  |  | 124 |
Mining exploration and research expenses | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 31 |  |  | 32 |  |  | — |  |  | — |  |  | 32 |
Environmental obligations and shutdown costs | — |  |  | 3 |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 33 |  |  | 36 |  |  | — |  |  | 1 |  |  | 37 |
Operating income (loss) | 88 |  |  | (88 | ) |  | — |  |  | 16 |  |  | (12 | ) |  | 4 |  |  | 78 |  |  | 52 |  |  | (29 | ) |  | 3 |  |  | 15 |  |  | (105 | ) |  | 18 |  |  | (3,735 | ) |  | (228 | ) |  | (3,945 | )
Interest expense, net | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |  |  | 19 |  |  | 23 |  |  | 51 |  |  | 89 |  |  | 163 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | 2 |  |  | 21 |  |  | 6 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 29 |  |  | — |  |  | (389 | ) |  | (360 | )
Total assets at September 30, 2015 | 3,720 |  |  | 5,159 |  |  | 8,879 |  |  | 9,136 |  |  | 1,843 |  |  | 10,979 |  |  | 8,965 |  |  | 5,100 |  |  | 2,017 |  |  | 235 |  |  | 699 |  |  | 1,326 |  |  | 38,200 |  |  | 11,911 |  |  | 272 |  |  | 50,383 |
Capital expenditures | 61 |  |  | 33 |  |  | 94 |  |  | 421 |  |  | 16 |  |  | 437 |  |  | 222 |  |  | 69 |  |  | 3 |  |  | 1 |  |  | 10 |  |  | 10 |  |  | 846 |  |  | 635 |  | g | 46 |  |  | 1,527 |
Three Months Ended September 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 140 |  |  | $ | 79 |  |  | $ | 219 |  |  | $ | 295 |  |  | $ | 441 |  |  | $ | 736 |  |  | $ | 1,086 |  | b | $ | 379 |  |  | $ | — |  |  | $ | 1,219 |  |  | $ | 597 |  |  | $ | 470 |  | c | $ | 4,706 |  |  | $ | 990 |  | d | $ | — |  |  | $ | 5,696 |
Intersegment | 428 |  |  | 843 |  |  | 1,271 |  |  | 63 |  |  | 48 |  |  | 111 |  |  | 167 |  |  | 49 |  |  | 173 |  |  | 8 |  |  | 4 |  |  | (1,783 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 341 |  |  | 561 |  |  | 902 |  |  | 178 |  |  | 293 |  |  | 471 |  |  | 700 |  |  | 206 |  |  | 86 |  |  | 1,220 |  |  | 578 |  |  | (1,283 | ) |  | 2,880 |  |  | 273 |  |  | (1 | ) |  | 3,152 |
Depreciation, depletion and amortization | 51 |  |  | 82 |  |  | 133 |  |  | 41 |  |  | 61 |  |  | 102 |  |  | 92 |  |  | 58 |  |  | 25 |  |  | 2 |  |  | 11 |  |  | 15 |  |  | 438 |  |  | 504 |  |  | 3 |  |  | 945 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 308 |  |  | — |  |  | 308 |
Selling, general and administrative expenses | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | 1 |  |  | 27 |  |  | 3 |  |  | — |  |  | — |  |  | 4 |  |  | 7 |  |  | 43 |  |  | 55 |  |  | 60 |  |  | 158 |
Mining exploration and research expenses | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 27 |  |  | 29 |  |  | — |  |  | — |  |  | 29 |
Environmental obligations and shutdown costs | — |  |  | (5 | ) |  | (5 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 23 |  |  | 18 |  |  | — |  |  | — |  |  | 18 |
Net gain on sales of assets | — |  |  | (14 | ) |  | (14 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (32 | ) |  | (46 | ) |  | — |  |  | — |  |  | (46 | )
Operating income (loss) | 176 |  |  | 295 |  |  | 471 |  |  | 139 |  |  | 134 |  |  | 273 |  |  | 434 |  |  | 161 |  |  | 62 |  |  | 5 |  |  | 8 |  |  | (70 | ) |  | 1,344 |  |  | (150 | ) |  | (62 | ) |  | 1,132 |
Interest expense, net | 1 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |  |  | 19 |  |  | 24 |  |  | 51 |  |  | 83 |  |  | 158 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | 47 |  |  | 95 |  |  | 142 |  |  | 181 |  |  | 36 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 359 |  |  | — |  |  | (10 | ) |  | 349 |
Total assets at September 30, 2014 | 3,689 |  |  | 5,742 |  |  | 9,431 |  |  | 7,006 |  |  | 3,721 |  |  | 10,727 |  |  | 8,537 |  |  | 5,010 |  |  | 2,089 |  |  | 282 |  |  | 948 |  |  | 1,025 |  |  | 38,049 |  |  | 25,328 |  |  | 498 |  |  | 63,875 |
Capital expenditures | 158 |  |  | 30 |  |  | 188 |  |  | 416 |  |  | 23 |  |  | 439 |  |  | 243 |  |  | 40 |  |  | 12 |  |  | 1 |  |  | 3 |  |  | 11 |  |  | 937 |  |  | 908 |  | g | 8 |  |  | 1,853 |
a. | Third-quarter 2014 includes the results of the Candelaria and Ojos del Salado mining operations, which were sold in November 2014.
b. | Includes PT-FI’s sales to PT Smelting totaling $61 million in third-quarter 2015 and $628 million in third-quarter 2014.
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 net mark-to-market gains associated with crude oil and natural gas derivative contracts totaling $29 million in third-quarter 2015 and $64 million in third-quarter 2014.
e. | Includes charges totaling $133 million at North America copper mines for inventory adjustments, impairments and restructuring, $11 million at other South America mines for restructuring, $5 million at Molybdenum mines and $35 million at other mining & eliminations for inventory adjustments and restructuring, and $2 million for restructuring at corporate, other & eliminations.
f. | Primarily includes impairment charges for Morocco oil and gas properties.
g. | Excludes capital expenditures totaling $37 million in third-quarter 2015 and $7 million in third-quarter 2014 primarily related to the Morocco oil and gas properties, which are included in corporate, other & eliminations.
(In millions) | Mining Operations |  |  |  |  |  |
| North America Copper Mines |  | South America |  | Indonesia |  | Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Atlantic |  | Other |  |  |  |  |  | Corporate, |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Molyb- |  |  |  | Copper |  | Mining |  |  |  | U.S. |  | Other |  |
|  |  | Other |  |  |  | Cerro |  | Other |  |  |  |  |  |  |  | denum |  | Rod & |  | Smelting |  | & Elimi- |  | Total |  | Oil & Gas |  | & Elimi- |  | FCX
| Morenci |  | Mines |  | Total |  | Verde |  | Mines a |  | Total |  | Grasberg |  | Tenke |  | Mines |  | Refining |  | & Refining |  | nations |  | Mining |  | Operations b |  | nations |  | Total
Nine Months Ended September 30, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 451 |  |  | $ | 265 |  |  | $ | 716 |  |  | $ | 681 |  |  | $ | 639 |  |  | $ | 1,320 |  |  | $ | 1,969 |  | c | $ | 991 |  |  | $ | — |  |  | $ | 3,097 |  |  | $ | 1,473 |  |  | $ | 921 |  | d | $ | 10,487 |  |  | $ | 1,594 |  | e | $ | 1 |  |  | $ | 12,082 |
Intersegment | 1,209 |  |  | 1,984 |  |  | 3,193 |  |  | 64 |  |  | (7 | ) | f | 57 |  |  | 37 |  |  | 98 |  |  | 298 |  |  | 20 |  |  | 12 |  |  | (3,715 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 1,117 |  |  | 1,816 |  |  | 2,933 |  | g | 540 |  |  | 464 |  | g | 1,004 |  |  | 1,311 |  |  | 634 |  |  | 253 |  | g | 3,097 |  |  | 1,397 |  |  | (2,840 | ) | g | 7,789 |  |  | 857 |  |  | 7 |  | g | 8,653 |
Depreciation, depletion and amortization | 157 |  |  | 251 |  |  | 408 |  |  | 134 |  |  | 102 |  |  | 236 |  |  | 238 |  |  | 195 |  |  | 77 |  |  | 7 |  |  | 29 |  |  | 51 |  |  | 1,241 |  |  | 1,465 |  |  | 11 |  |  | 2,717 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 9,270 |  |  | 172 |  | h | 9,442 |
Selling, general and administrative expenses | 2 |  |  | 2 |  |  | 4 |  |  | 2 |  |  | 1 |  |  | 3 |  |  | 74 |  |  | 8 |  |  | — |  |  | — |  |  | 13 |  |  | 16 |  |  | 118 |  |  | 140 |  |  | 171 |  |  | 429 |
Mining exploration and research expenses | — |  |  | 6 |  |  | 6 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 95 |  |  | 101 |  |  | — |  |  | — |  |  | 101 |
Environmental obligations and shutdown costs | — |  |  | 3 |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 57 |  |  | 60 |  |  | — |  |  | 1 |  |  | 61 |
Net gain on sales of assets | — |  |  | (39 | ) |  | (39 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (39 | ) |  | — |  |  | — |  |  | (39 | )
Operating income (loss) | 384 |  |  | 210 |  |  | 594 |  |  | 69 |  |  | 65 |  |  | 134 |  |  | 383 |  |  | 252 |  |  | (32 | ) |  | 13 |  |  | 46 |  |  | (173 | ) |  | 1,217 |  |  | (10,138 | ) |  | (361 | ) |  | (9,282 | )
Interest expense, net | 2 |  |  | 1 |  |  | 3 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 8 |  |  | 57 |  |  | 69 |  |  | 129 |  |  | 260 |  |  | 458 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | — |  |  | 32 |  |  | 32 |  |  | 145 |  |  | 59 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 236 |  |  | — |  |  | (1,978 | ) |  | (1,742 | )
Capital expenditures | 224 |  |  | 84 |  |  | 308 |  |  | 1,296 |  |  | 43 |  |  | 1,339 |  |  | 660 |  |  | 166 |  |  | 10 |  |  | 2 |  |  | 18 |  |  | 37 |  |  | 2,540 |  |  | 2,430 |  | i | 85 |  |  | 5,055 |
Nine Months Ended September 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaffiliated customers | $ | 215 |  |  | $ | 195 |  |  | $ | 410 |  |  | $ | 996 |  |  | $ | 1,387 |  |  | $ | 2,383 |  |  | $ | 2,071 |  | c | $ | 1,071 |  |  | $ | — |  |  | $ | 3,599 |  |  | $ | 1,808 |  |  | $ | 1,374 |  | d | $ | 12,716 |  |  | $ | 3,487 |  | e | $ | — |  |  | $ | 16,203 |
Intersegment | 1,346 |  |  | 2,489 |  |  | 3,835 |  |  | 150 |  |  | 243 |  |  | 393 |  |  | 175 |  |  | 102 |  |  | 469 |  |  | 24 |  |  | 15 |  |  | (5,013 | ) |  | — |  |  | — |  |  | — |  |  | — |
Production and delivery | 936 |  |  | 1,622 |  |  | 2,558 |  |  | 538 |  |  | 939 |  |  | 1,477 |  |  | 1,594 |  |  | 556 |  |  | 243 |  |  | 3,601 |  |  | 1,784 |  |  | (3,753 | ) |  | 8,060 |  |  | 913 |  |  | (2 | ) |  | 8,971 |
Depreciation, depletion and amortization | 128 |  |  | 240 |  |  | 368 |  |  | 120 |  |  | 164 |  |  | 284 |  |  | 194 |  |  | 172 |  |  | 71 |  |  | 7 |  |  | 31 |  |  | 51 |  |  | 1,178 |  |  | 1,736 |  |  | 10 |  |  | 2,924 |
Impairment of oil and gas properties | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 308 |  |  | — |  |  | 308 |
Selling, general and administrative expenses | 1 |  |  | 2 |  |  | 3 |  |  | 2 |  |  | 3 |  |  | 5 |  |  | 73 |  |  | 9 |  |  | — |  |  | — |  |  | 13 |  |  | 20 |  |  | 123 |  |  | 171 |  |  | 163 |  |  | 457 |
Mining exploration and research expenses | — |  |  | 6 |  |  | 6 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 87 |  |  | 93 |  |  | — |  |  | — |  |  | 93 |
Environmental obligations and shutdown costs | — |  |  | (5 | ) |  | (5 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 105 |  |  | 100 |  |  | — |  |  | — |  |  | 100 |
Net gain on sales of assets | — |  |  | (14 | ) |  | (14 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (32 | ) |  | (46 | ) |  | — |  |  | — |  |  | (46 | )
Operating income (loss) | 496 |  |  | 833 |  |  | 1,329 |  |  | 486 |  |  | 524 |  |  | 1,010 |  |  | 385 |  |  | 436 |  |  | 155 |  |  | 15 |  |  | (5 | ) |  | (117 | ) |  | 3,208 |  |  | 359 |  |  | (171 | ) |  | 3,396 |
Interest expense, net | 2 |  |  | 1 |  |  | 3 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10 |  |  | 55 |  |  | 69 |  |  | 201 |  |  | 213 |  |  | 483 |
Provision for (benefit from) income taxes | — |  |  | — |  |  | — |  |  | 177 |  |  | 232 |  |  | 409 |  |  | 166 |  |  | 93 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 668 |  |  | — |  |  | 366 |  |  | 1,034 |
Capital expenditures | 691 |  |  | 124 |  |  | 815 |  |  | 1,207 |  |  | 71 |  |  | 1,278 |  |  | 722 |  |  | 100 |  |  | 45 |  |  | 3 |  |  | 9 |  |  | 38 |  |  | 3,010 |  |  | 2,392 |  | i | 13 |  |  | 5,415 |
a. | For the first nine months of 2014 Other South America Mines include the results of the Candelaria and Ojos del Salado mining operations, which were sold in November 2014.
b. | The first nine months of 2014 include the results from Eagle Ford, which was sold in June 2014.
c. | Includes PT-FI’s sales to PT Smelting totaling $704 million for the first nine months of 2015 and $1.5 billion for the first nine months of 2014.
d. | 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.
e. | Includes net mark-to-market gains (losses) associated with crude oil and natural gas derivative contracts totaling $87 million for the first nine months 2015 and $(56) million for the first nine months of 2014.
f. | Includes net reductions for provisional pricing adjustments to prior period open sales. There were no intersegment sales from El Abra for the first nine months of 2015.
g. | Includes charges totaling $144 million at North America copper mines for inventory adjustments, impairments and restructuring, $11 million at other South America mines for restructuring, $8 million at Molybdenum mines and $84 million at other mining & eliminations for inventory adjustments and restructuring, and $2 million for restructuring at corporate, other & eliminations.
h. | Primarily includes impairment charges for Morocco oil and gas properties.
i. | Excludes capital expenditures totaling $81 million for the first nine months of 2015 and $7 million for the first nine months of 2014 primarily related to the Morocco oil and gas properties, which are included in corporate, other & eliminations.

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