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Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Income Statement [Abstract] |  |  |  |
Revenues | $ 4,310 | $ 3,877 | $ 11,362 | $ 10,453
Cost of sales: |  |  |  |
Production and delivery | 2,802 | 2,529 | 7,497 | 7,984
Depreciation, depletion and amortization | 418 | 643 | 1,257 | 1,937
Impairment of oil and gas properties | 0 | 239 | 0 | 4,317
Total cost of sales | 3,220 | 3,411 | 8,754 | 14,238
Selling, general and administrative expenses | 106 | 110 | 366 | 408
Mining exploration and research expenses | 27 | 13 | 61 | 46
Environmental obligations and shutdown costs (credits) | 73 | (3) | 81 | 18
Net gain on sales of assets | (33) | (13) | (66) | (762)
Total costs and expenses | 3,393 | 3,518 | 9,196 | 13,948
Operating income (loss) | 917 | 359 | 2,166 | (3,495)
Interest expense, net | (304) | (187) | (633) | (574)
Net loss (gain) on exchanges and early extinguishment of debt | 11 | 15 | 8 | 51
Other income (expense), net | 2 | (10) | 36 | 54
Income (loss) from continuing operations before income taxes and equity in affiliated companies’ net earnings | 626 | 177 | 1,577 | (3,964)
(Provision for) benefit from income taxes | (387) | 114 | (747) | (79)
Equity in affiliated companies’ net earnings | 3 | 1 | 6 | 9
Net income (loss) from continuing operations | 242 | 292 | 836 | (4,034)
Net income (loss) from discontinued operations | 3 | (6) | 50 | (191)
Net income (loss) | 245 | 286 | 886 | (4,225)
Net income attributable to noncontrolling interests: |  |  |  |
Continuing operations | 35 | (37) | (106) | (146)
Discontinued operations | 0 | (22) | (4) | (44)
Preferred dividends attributable to redeemable noncontrolling interest | 0 | (10) | 0 | (31)
Net income (loss) attributable to common stockholders | $ 280 | $ 217 | $ 776 | $ (4,446)
Basic and diluted net income (loss) per share attributable to common stockholders: |  |  |  |
Continuing operations | $ 0.19 | $ 0.18 | $ 0.50 | $ (3.27)
Discontinued operations | 0.00 | (0.02) | 0.03 | (0.18)
Basic and diluted net income (loss) per share attributable to common stockholders: | $ 0.19 | $ 0.16 | $ 0.53 | $ (3.45)
Basic | 1,448 | 1,346 | 1,447 | 1,289
Diluted | 1,454 | 1,351 | 1,453 | 1,289

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + 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 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in 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 16 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1448-109256 + Details
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