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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
REVENUES AND OTHER INCOME |  |  |  |
Net sales | $ 5,958 | $ 2,928 | $ 11,251 | $ 9,541
Interest, dividends and other income | 49 | 33 | 124 | 67
Gains on sales of equity investments and other assets, net | 3 | 15 | 114 | 22
Total | 6,010 | 2,976 | 11,489 | 9,630
COSTS AND OTHER DEDUCTIONS |  |  |  |
Oil and gas operating expense | 712 | 631 | 1,488 | 1,700
Transportation and gathering expense | 364 | 367 | 693 | 932
Chemical and midstream cost of sales | 676 | 577 | 1,270 | 1,189
Purchased commodities | 487 | 214 | 1,045 | 607
Selling, general and administrative expense | 177 | 225 | 343 | 489
Other operating and non-operating expense | 248 | 114 | 506 | 311
Taxes other than on income | 244 | 68 | 454 | 293
Depreciation, depletion and amortization | 2,371 | 2,119 | 4,565 | 4,428
Asset impairments and other charges | 21 | 6,470 | 156 | 8,273
Anadarko acquisition-related costs | 52 | 149 | 93 | 297
Exploration expense | 86 | 33 | 114 | 70
Interest and debt expense, net | 385 | 310 | 780 | 662
Total | 5,823 | 11,277 | 11,507 | 19,251
Income (loss) before income taxes and other items | 187 | (8,301) | (18) | (9,621)
OTHER ITEMS |  |  |  |
Gains (losses) on interest rate swaps and warrants, net | (223) | (76) | 176 | (661)
Income from equity investments | 179 | 193 | 300 | 60
Total | (44) | 117 | 476 | (601)
Income (loss) from continuing operations before income taxes | 143 | (8,184) | 458 | (10,222)
Income tax benefit (expense) | (43) | 1,468 | (59) | 1,493
Income (loss) from continuing operations | 100 | (6,716) | 399 | (8,729)
Income (loss) from discontinued operations, net of tax | 3 | (1,415) | (442) | (1,415)
NET INCOME (LOSS) | 103 | (8,131) | (43) | (10,144)
Less: Preferred stock dividends | (200) | (222) | (400) | (441)
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS | $ (97) | $ (8,353) | $ (443) | $ (10,585)
PER COMMON SHARE, BASIC |  |  |  |
Loss from continuing operations—basic (in usd per share) | $ (0.11) | $ (7.58) | $ 0 | $ (10.12)
Income (loss) from discontinued operations - basic (in usd per share) | 0.01 | (1.54) | (0.47) | (1.56)
Net loss attributable to common stockholders—basic (in usd per share) | (0.10) | (9.12) | (0.47) | (11.68)
PER COMMON SHARE, DILUTED |  |  |  |
Loss from continuing operations—diluted (in usd per share) | (0.11) | (7.58) | 0 | (10.12)
Income (loss) from discontinued operations - diluted (in usd per share) | 0.01 | (1.54) | (0.47) | (1.56)
Net loss attributable to common stockholders—diluted (in usd per share) | $ (0.10) | $ (9.12) | $ (0.47) | $ (11.68)

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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e62136-109447 + Details
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