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Guarantor Financial Statements (Unaudited) Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 05, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | $ 286 | $ (3,790) | $ (4,225) | $ (7,995)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 2,017 | 2,717
Impairment of oil and gas properties |  | 239 | 3,652 | 4,317 | 9,442
Net gains on crude oil derivative contracts |  |  |  | 0 | (87)
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | (9) | 1
Other, net |  |  |  | 31 | (1,812)
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 463 | 342
Net cash provided by operating activities |  |  |  | 2,594 | 2,608
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  | (494) | (1,527) | (2,309) | (5,055)
Intercompany loans |  |  |  | 0 | 0
Dividends from (investments in) consolidated subsidiaries |  |  |  | 0 | (2)
Asset sales and other, net |  |  |  | 1,415 | 116
Net cash provided by (used in) investing activities |  |  |  | (894) | (4,941)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 3,463 | 6,552
Repayments of debt |  |  |  | (4,539) | (4,693)
Intercompany loans |  |  |  | 0 | 0
Net proceeds from sale of common stock | $ 1,970 | 411 |  | 442 | 999
Cash dividends and distributions paid, and contributions received, net |  |  |  | (92) | (636)
Other, net |  |  |  | (22) | (15)
Net cash (used in) provided by financing activities |  |  |  | (748) | 2,207
Net increase (decrease) in cash and cash equivalents |  |  |  | 952 | (126)
(Increase) decrease in cash and cash equivalents in assets held for sale |  |  |  | (39) | 42
Cash and cash equivalents at beginning of year | 195 |  |  | 195 | 317
Cash and cash equivalents at end of period |  | 1,108 | 233 | 1,108 | 233
FCX Issuer [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 217 | (3,830) | (4,446) | (8,155)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 4 | 3
Impairment of oil and gas properties |  |  |  | 0 | 0
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 2,450 | 5,967
Other, net |  |  |  | (116) | (1,953)
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 1,844 | 4,001
Net cash provided by operating activities |  |  |  | (264) | (137)
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | 0 | (7)
Intercompany loans |  |  |  | (1,021) | (1,310)
Dividends from (investments in) consolidated subsidiaries |  |  |  | 1,643 | 693
Asset sales and other, net |  |  |  | 0 | (21)
Net cash provided by (used in) investing activities |  |  |  | 622 | (645)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 1,721 | 3,893
Repayments of debt |  |  |  | (2,498) | (3,550)
Intercompany loans |  |  |  | 0 | 0
Net proceeds from sale of common stock |  |  |  | 442 | 999
Cash dividends and distributions paid, and contributions received, net |  |  |  | (5) | (547)
Other, net |  |  |  | (18) | (13)
Net cash (used in) provided by financing activities |  |  |  | (358) | 782
Net increase (decrease) in cash and cash equivalents |  |  |  | 0 | 0
(Increase) decrease 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 |  | (589) | (3,240) | (5,079) | (8,920)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 146 | 303
Impairment of oil and gas properties |  | 95 | 1,700 | 1,531 | 3,710
Net gains on crude oil derivative contracts |  |  |  |  | (87)
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 3,202 | 6,516
Other, net |  |  |  | 575 | 2
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | (669) | (1,213)
Net cash provided by operating activities |  |  |  | (294) | 311
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | (497) | (959)
Intercompany loans |  |  |  | (518) | (955)
Dividends from (investments in) consolidated subsidiaries |  |  |  | (41) | (49)
Asset sales and other, net |  |  |  | 208 | (2)
Net cash provided by (used in) investing activities |  |  |  | (848) | (1,965)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 0 | 0
Repayments of debt |  |  |  | 0 | 0
Intercompany loans |  |  |  | 1,223 | 1,708
Net proceeds from sale of common stock |  |  |  | 0 | 0
Cash dividends and distributions paid, and contributions received, net |  |  |  | (78) | (17)
Other, net |  |  |  | (2) | (37)
Net cash (used in) provided by financing activities |  |  |  | 1,143 | 1,654
Net increase (decrease) in cash and cash equivalents |  |  |  | 1 | 0
(Increase) decrease 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 |  | 1 | 1 | 1 | 1
Non-Guarantor Subsidiaries [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (233) | (3,846) | (5,430) | (12,364)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | 1,882 | 2,474
Impairment of oil and gas properties |  | 200 | 2,000 | 2,765 | 5,684
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | 5,072 | 8,947
Other, net |  |  |  | (424) | 139
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | (714) | (2,457)
Net cash provided by operating activities |  |  |  | 3,151 | 2,423
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | (1,814) | (4,079)
Intercompany loans |  |  |  | 0 | 0
Dividends from (investments in) consolidated subsidiaries |  |  |  | 124 | 102
Asset sales and other, net |  |  |  | 1,210 | 118
Net cash provided by (used in) investing activities |  |  |  | (480) | (3,859)
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 1,742 | 2,659
Repayments of debt |  |  |  | (2,041) | (1,143)
Intercompany loans |  |  |  | 316 | 557
Net proceeds from sale of common stock |  |  |  | 374 | 0
Cash dividends and distributions paid, and contributions received, net |  |  |  | (2,096) | (749)
Other, net |  |  |  | (15) | (14)
Net cash (used in) provided by financing activities |  |  |  | (1,720) | 1,310
Net increase (decrease) in cash and cash equivalents |  |  |  | 951 | (126)
(Increase) decrease in cash and cash equivalents in assets held for sale |  |  |  | (39) | 42
Cash and cash equivalents at beginning of year | 195 |  |  | 195 | 316
Cash and cash equivalents at end of period |  | 1,107 | 232 | 1,107 | 232
Consolidation, Eliminations [Member] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 891 | 7,126 | 10,730 | 21,444
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |  |  |
Depreciation, Depletion and Amortization |  |  |  | (15) | (63)
Impairment of oil and gas properties |  |  |  | 21 | 48
Net gains on crude oil derivative contracts |  |  |  |  | 0
Equity in losses (earnings) of consolidated subsidiaries |  |  |  | (10,733) | (21,429)
Other, net |  |  |  | (4) | 0
Changes in working capital and other tax payments, excluding amounts from dispositions |  |  |  | 2 | 11
Net cash provided by operating activities |  |  |  | 1 | 11
Cash flow from investing activities: |  |  |  |  |
Capital expenditures |  |  |  | 2 | (10)
Intercompany loans |  |  |  | 1,539 | 2,265
Dividends from (investments in) consolidated subsidiaries |  |  |  | (1,726) | (748)
Asset sales and other, net |  |  |  | (3) | 21
Net cash provided by (used in) investing activities |  |  |  | (188) | 1,528
Cash flow from financing activities: |  |  |  |  |
Proceeds from debt |  |  |  | 0 | 0
Repayments of debt |  |  |  | 0 | 0
Intercompany loans |  |  |  | (1,539) | (2,265)
Net proceeds from sale of common stock |  |  |  | (374) | 0
Cash dividends and distributions paid, and contributions received, net |  |  |  | 2,087 | 677
Other, net |  |  |  | 13 | 49
Net cash (used in) provided by financing activities |  |  |  | 187 | (1,539)
Net increase (decrease) in cash and cash equivalents |  |  |  | 0 | 0
(Increase) decrease 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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