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CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
OPERATING REVENUES |  |
Operating revenues | $ 1,639 | $ 2,070
Gain (loss) on derivative instruments | 138 | (391)
Total operating revenues | 1,777 | 1,679
OPERATING EXPENSES |  |
Direct operations | 134 | 100
Transportation, processing and gathering | 236 | 233
Taxes other than income | 86 | 76
Exploration | 4 | 6
Depreciation, depletion and amortization | 369 | 360
General and administrative | 76 | 107
Total operating expenses | 905 | 882
Gain on sale of assets | 5 | 2
INCOME FROM OPERATIONS | 877 | 799
Interest expense | 17 | 21
Interest income | (12) | 0
Income before income taxes | 872 | 778
Income tax expense | 195 | 170
NET INCOME | $ 677 | $ 608
Earnings per share |  |
Basic (in dollars per share) | $ 0.88 | $ 0.75
Diluted (in dollars per share) | $ 0.88 | $ 0.74
Weighted-average common shares outstanding |  |
Basic (in shares) | 764 | 810
Diluted (in shares) | 768 | 814
Natural gas |  |
OPERATING REVENUES |  |
Operating revenues | $ 822 | $ 1,111
Oil |  |
OPERATING REVENUES |  |
Operating revenues | 615 | 699
NGL |  |
OPERATING REVENUES |  |
Operating revenues | 177 | 245
Other |  |
OPERATING REVENUES |  |
Operating revenues | $ 25 | $ 15

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e62136-109447 + Details
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