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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2012 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 4,377 | $ 3,877 | $ 3,334 | $ 3,242 | $ 3,516 | $ 3,382 | $ 3,938 | $ 3,771 | $ 14,830 | $ 14,607 | $ 20,001
Cost of sales: |  |  |  |  |  |  |  |  |  |  |  |
Production and delivery |  |  |  |  |  |  |  |  |  | 10,697 | 10,693 | 11,116
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  | 2,530 | 3,240 | 3,635
Impairment of Oil and Gas Properties |  |  | 239 | 291 | 3,800 | 3,700 | 3,700 | 2,700 | 3,100 | 4,317 | 13,144 | 3,737
Metals inventory adjustments |  | 9 | 20 | 2 | 5 | 184 | 91 | 59 | 4 | 36 | 338 | 6
Total cost of sales |  |  |  |  |  |  |  |  |  | 17,580 | 27,415 | 18,494
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 607 | 558 | 580
Mining exploration and research expenses |  |  |  |  |  |  |  |  |  | 64 | 107 | 106
Environmental obligations and shutdown costs |  |  |  |  |  |  |  |  |  | 20 | 78 | 119
Goodwill impairment |  |  |  |  |  |  |  |  |  | 0 | 0 | 1,717
Net gain on sales of assets |  | 113 |  | (13) | (749) |  |  |  | (39) | (649) | (39) | (717)
Total costs and expenses |  |  |  |  |  |  |  |  |  | 17,622 | 28,119 | 20,299
Operating loss |  | 703 | 359 | 18 | (3,872) | (4,097) | (3,964) | (2,421) | (3,030) | (2,792) | (13,512) | (298)
Interest expense, net |  |  |  |  |  |  |  |  |  | (755) | (617) | (606)
Net gain on exchanges and early extinguishment of debt |  |  |  |  |  |  |  |  |  | 26 | 0 | 73
Other income, net |  |  |  |  |  |  |  |  |  | 49 | 1 | 31
Loss from continuing operations before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  | (3,472) | (14,128) | (800)
(Provision for) benefit from income taxes |  |  |  |  |  |  |  |  |  | (371) | 1,951 | (225)
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  | 11 | (3) | 3
Net loss from continuing operations |  | 202 | 292 | (229) | (4,097) | (4,090) | (3,815) | (1,828) | (2,447) | (3,832) | (12,180) | (1,022)
Net (loss) income from discontinued operations |  | (2) | (6) | (181) | (4) | (4) | 25 | 29 | 41 | (193) | 91 | 277
Net loss |  | 200 | 286 | (410) | (4,101) | (4,094) | (3,790) | (1,799) | (2,406) | (4,025) | (12,089) | (745)
Net income attributable to noncontrolling interests: Continuing Operations |  |  |  |  |  |  |  |  |  | (227) | (27) | (358)
Net income attributable to noncontrolling interests: Discontinued Operations |  | (19) | (22) | (12) | (10) | (11) | (16) | (26) | (26) | (63) | (79) | (165)
Gain on redemption and preferred dividends attributable to redeemable noncontrolling interest |  |  |  |  |  |  |  |  |  | 161 | (41) | (40)
Net loss attributable to common stockholders |  | $ 292 | $ 217 | $ (479) | $ (4,184) | $ (4,081) | $ (3,830) | $ (1,851) | $ (2,474) | $ (4,154) | $ (12,236) | $ (1,308)
Basic and diluted net (loss) income per share attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) |  | $ 0.22 | $ 0.18 | $ (0.23) | $ (3.34) | $ (3.46) | $ (3.59) | $ (1.78) | $ (2.40) | $ (2.96) | $ (11.32) | $ (1.37)
Discontinued operations (in dollars per share) |  | (0.01) | (0.02) | (0.15) | (0.01) | (0.01) | 0.01 | 0.00 | 0.02 | (0.20) | 0.01 | 0.11
Earnings per share, basic and diluted (in dollars per share) |  | $ 0.21 | $ 0.16 | $ (0.38) | $ (3.35) | $ (3.47) | $ (3.58) | $ (1.78) | (2.38) | $ (3.16) | $ (11.31) | $ (1.26)
Basic and diluted weighted-average shares of common stock outstanding (in shares) |  |  |  |  |  |  |  |  |  | 1,318 | 1,082 | 1,039
Dividends declared per share of common stock (in dollars per share) | $ 1.25 |  |  |  |  |  |  |  | $ 0.20 | $ 0 | $ 0.2605 | $ 1.25

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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66092785&loc=d3e4542-108314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 1C -URI http://asc.fasb.org/extlink&oid=68049868&loc=SL66093883-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=68049868&loc=SL66093879-108312 + Details
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- Definition Costs incurred related to mineral extraction, processing and marketing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256 + Details
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- Definition The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256 + Details
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