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Guarantor Financial Statements (Unaudited) Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 05, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | $ (410) | $ (1,799) | $ (4,511) | $ (4,205)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 1,374 | 1,829
Impairment of oil and gas properties |  | 291 | 2,686 | 4,078 | 5,790
Net gains on crude oil derivative contracts |  |  |  | 0 | (58)
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | (8) | (1)
Other, net |  |  |  | 215 | (1,379)
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 466 | (190)
Net cash provided by operating activities |  |  |  | 1,614 | 1,786
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  | (833) | (1,661) | (1,815) | (3,528)
Intercompany loans |  |  |  | 0 | 0
Dividends from (investments in) consolidated subsidiaries |  |  |  | 0 | 0
Asset sales and other, net |  |  |  | 1,280 | 136
Net cash provided by (used in) investing activities |  |  |  | (535) | (3,392)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 2,811 | 4,422
Repayments of debt |  |  |  | (3,649) | (2,360)
Intercompany loans |  |  |  | 0 | 0
Net proceeds from sale of common stock | $ 1,970 |  |  | 32 | 0
Cash dividends and distributions paid, and contributions received, net |  |  |  | (44) | (440)
Other, net |  |  |  | (23) | (14)
Net cash (used in) provided by financing activities |  |  |  | (873) | 1,608
Net increase in cash and cash equivalents |  |  |  | 206 | 2
Increase in cash and cash equivalents in assets held for sale |  |  |  | (49) | (1)
Cash and cash equivalents at beginning of year | 195 |  |  | 195 | 317
Cash and cash equivalents at end of period |  | 352 | 318 | 352 | 318
FCX Issuer [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (481) | (1,851) | (4,664) | (4,325)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 3 | 2
Impairment of oil and gas properties |  |  |  | 0 | 0
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 2,375 | 3,524
Other, net |  |  |  | 104 | (1,431)
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 2,009 | 2,222
Net cash provided by operating activities |  |  |  | (173) | (8)
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | 0 | 0
Intercompany loans |  |  |  | (994) | (1,073)
Dividends from (investments in) consolidated subsidiaries |  |  |  | 1,935 | 438
Asset sales and other, net |  |  |  | 0 | (10)
Net cash provided by (used in) investing activities |  |  |  | 941 | (645)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 1,505 | 2,735
Repayments of debt |  |  |  | (2,282) | (1,690)
Intercompany loans |  |  |  | 0 | 0
Net proceeds from sale of common stock |  |  |  | 32 |
Cash dividends and distributions paid, and contributions received, net |  |  |  | (5) | (380)
Other, net |  |  |  | (18) | (12)
Net cash (used in) provided by financing activities |  |  |  | (768) | 653
Net increase in cash and cash equivalents |  |  |  | 0 | 0
Increase in cash and cash equivalents in assets held for sale |  |  |  | 0 | 0
Cash and cash equivalents at beginning of year | 0 |  |  | 0 | 0
Cash and cash equivalents at end of period |  | 0 | 0 | 0 | 0
FM O&G LLC Guarantor [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (847) | (2,596) | (4,490) | (5,680)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 92 | 223
Impairment of oil and gas properties |  | 200 | 1,000 | 1,436 | 2,052
Net gains on crude oil derivative contracts |  |  |  |  | (58)
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 2,985 | 4,279
Other, net |  |  |  | 600 | 9
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | (713) | (550)
Net cash provided by operating activities |  |  |  | (90) | 275
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | (433) | (734)
Intercompany loans |  |  |  | (493) | (794)
Dividends from (investments in) consolidated subsidiaries |  |  |  | (41) | (31)
Asset sales and other, net |  |  |  | 91 | (1)
Net cash provided by (used in) investing activities |  |  |  | (876) | (1,560)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 0 | 0
Repayments of debt |  |  |  | 0 | 0
Intercompany loans |  |  |  | 1,018 | 1,321
Net proceeds from sale of common stock |  |  |  | 0 |
Cash dividends and distributions paid, and contributions received, net |  |  |  | 0 | 0
Other, net |  |  |  | (52) | (37)
Net cash (used in) provided by financing activities |  |  |  | 966 | 1,284
Net increase in cash and cash equivalents |  |  |  | 0 | (1)
Increase in cash and cash equivalents in assets held for sale |  |  |  | 0 | 0
Cash and cash equivalents at beginning of year | 0 |  |  | 0 | 1
Cash and cash equivalents at end of period |  | 0 | 0 | 0 | 0
Non-Guarantor Subsidiaries [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (300) | (3,819) | (5,198) | (8,518)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 1,293 | 1,638
Impairment of oil and gas properties |  | 100 | 1,700 | 2,622 | 3,717
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 4,483 | 6,502
Other, net |  |  |  | (489) | 43
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | (836) | (1,870)
Net cash provided by operating activities |  |  |  | 1,875 | 1,512
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | (1,380) | (2,787)
Intercompany loans |  |  |  | 0 | 0
Dividends from (investments in) consolidated subsidiaries |  |  |  | 78 | 74
Asset sales and other, net |  |  |  | 1,189 | 137
Net cash provided by (used in) investing activities |  |  |  | (113) | (2,576)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 1,306 | 1,687
Repayments of debt |  |  |  | (1,367) | (670)
Intercompany loans |  |  |  | 469 | 546
Net proceeds from sale of common stock |  |  |  | 42 |
Cash dividends and distributions paid, and contributions received, net |  |  |  | (1,989) | (481)
Other, net |  |  |  | (17) | (15)
Net cash (used in) provided by financing activities |  |  |  | (1,556) | 1,067
Net increase in cash and cash equivalents |  |  |  | 206 | 3
Increase in cash and cash equivalents in assets held for sale |  |  |  | (49) | (1)
Cash and cash equivalents at beginning of year | 195 |  |  | 195 | 316
Cash and cash equivalents at end of period |  | 352 | 318 | 352 | 318
Consolidation, Eliminations [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 1,218 | 6,467 | 9,841 | 14,318
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | (14) | (34)
Impairment of oil and gas properties |  |  |  | 20 | 21
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | (9,851) | (14,306)
Other, net |  |  |  | 0 | 0
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 6 | 8
Net cash provided by operating activities |  |  |  | 2 | 7
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | (2) | (7)
Intercompany loans |  |  |  | 1,487 | 1,867
Dividends from (investments in) consolidated subsidiaries |  |  |  | (1,972) | (481)
Asset sales and other, net |  |  |  | 0 | 10
Net cash provided by (used in) investing activities |  |  |  | (487) | 1,389
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 0 | 0
Repayments of debt |  |  |  | 0 | 0
Intercompany loans |  |  |  | (1,487) | (1,867)
Net proceeds from sale of common stock |  |  |  | (42) |
Cash dividends and distributions paid, and contributions received, net |  |  |  | 1,950 | 421
Other, net |  |  |  | 64 | 50
Net cash (used in) provided by financing activities |  |  |  | 485 | (1,396)
Net increase in cash and cash equivalents |  |  |  | 0 | 0
Increase in cash and cash equivalents in assets held for sale |  |  |  | 0 | 0
Cash and cash equivalents at beginning of year | $ 0 |  |  | 0 | 0
Cash and cash equivalents at end of period |  | $ 0 | $ 0 | $ 0 | $ 0

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