| Dec 31, 2010 | Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Net income including noncontrolling interest | - | - | - | - | - | - | - | - | 1,253 | -1,262 | 48 | 1,139 | 724 | 486 |
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| Depreciation, depletion and amortization | 1,165 | 1,093 | 1,376 | 1,553 | 1,906 | 1,620 | 1,054 | 958 | 1,148 | 987 | 795 | 777 | 862 | 866 |
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| Unsuccessful exploration well costs and previously suspended exploration costs | - | - | - | - | - | - | - | - | - | - | - | - | 170 | 73 |
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| Deferred income tax expense | 143 | 172 | 317 | 158 | -171 | -978 | -388 | 260 | 29 | -278 | -4 | 286 | 180 | 72 |
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| Impairment of assets | - | 369 | 261 | 22 | 51 | 2,493 | 95 | - | - | - | - | - | - | 63 |
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| Accretion of asset retirement obligations | 32 | 38 | 39 | 49 | 51 | 49 | 47 | 43 | 41 | 42 | 47 | 46 | 46 | 53 |
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| Long-term non-cash compensation | - | - | - | - | - | - | - | - | 77 | 47 | 63 | 89 | 62 | 45 |
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| Amortization Of Undeveloped Lease | - | - | - | - | - | - | - | - | - | 27 | 19 | 13 | 11 | 10 |
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| Loss from discontinued operations | - | 132 | 7 | 235 | -119 | -15 | -2 | -1 | 1,064 | -7 | -1 | -2 | -1 | -3 |
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| Mark-to-market loss (gain) on derivative instruments | - | - | - | - | - | - | - | - | -33 | -69 | -112 | 215 | - | -2 |
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| Contingent consideration payment | - | - | - | - | - | - | - | - | - | - | - | - | 140 | - |
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| Mark-to-market loss on contingent consideration | - | - | - | - | - | - | - | - | 9 | -14 | 63 | 78 | 7 | - |
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| Gain from sale of assets | - | - | - | - | 139 | 154 | 2 | 127 | 0 | - | - | 18 | 0 | - |
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| Other operating activities, net | - | - | - | - | -24 | -5 | 45 | 113 | -59 | -35 | -54 | -34 | -75 | -18 |
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| Net decrease (increase) in non-cash working capital | -640 | -825 | 401 | -266 | 4 | -35 | 39 | -136 | 17 | 32 | -118 | 66 | 99 | -75 |
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| Net cash provided by continuing operations activities | 3,129 | 2,000 | 2,995 | 3,211 | 3,049 | 1,183 | 601 | 1,130 | - | - | - | 2,180 | 1,749 | 1,729 |
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| Property additions and dry hole costs | - | - | - | - | - | - | - | - | - | 760 | 670 | 985 | 1,066 | 908 |
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| Acquisition of oil and natural gas properties | - | - | - | - | - | - | - | - | 1,212 | - | - | 129 | 36 | - |
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| Proceeds from sales of property, plant and equipment | - | - | - | - | - | - | - | - | - | - | - | - | 103 | - |
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| Net cash required by investing activities | -2,329 | -1,614 | -3,317 | -3,731 | - | - | - | - | -2,536 | -859 | -418 | -1,109 | -999 | -908 |
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| Retirement of debt | - | - | - | - | - | - | - | - | 521 | 12 | 876 | 648 | 498 | 650 |
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| Early redemption of debt cost | - | - | - | - | - | - | - | - | 27 | - | 39 | 8 | - | 16 |
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| Debt issuance | - | - | - | - | - | - | - | - | - | - | - | - | - | 600 |
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| Debt issuance cost | - | 8 | 7 | 3 | - | - | 14 | - | - | - | - | 14 | 0 | 10 |
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| Borrowings on revolving credit facility | - | - | - | - | - | - | - | - | - | - | - | 400 | 600 | 350 |
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| Repayment of revolving credit facility | - | - | - | - | - | - | - | - | - | - | - | 400 | 600 | 350 |
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| Issue costs of revolving credit facility | - | - | - | - | - | - | - | - | - | - | - | - | - | 15 |
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| Repurchase of common stock | - | - | 250 | 500 | 375 | 250 | - | - | 500 | - | - | - | 150 | 301 |
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| Cash dividends paid | 201 | 213 | 714 | 235 | 236 | 245 | 207 | 173 | 164 | 96 | 77 | 128 | 171 | 180 |
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| Distributions to noncontrolling interest | - | - | - | - | - | - | - | - | 128 | 44 | 138 | 183 | 29 | 119 |
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| Withholding tax on stock-based incentive awards | - | 8 | 3 | 17 | 7 | 9 | - | - | 7 | 7 | 5 | 18 | 14 | 25 |
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| Finance lease obligation payments | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 |
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| Contingent consideration payment | - | - | - | - | - | - | - | - | - | - | - | 82 | 60 | - |
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| Net cash required by financing activities | -566 | -548 | 686 | -108 | - | - | - | - | -1,130 | 40 | -795 | -1,082 | -924 | -717 |
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| Net cash required by discontinued operations | - | - | - | - | 261 | 183 | - | -2 | 2,091 | 3 | - | -14 | - | - |
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| Effect of exchange rate changes on cash and cash equivalents | - | - | - | - | - | - | - | - | 4 | 2 | 1 | -4 | -1 | 2 |
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| Net increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | -53 | 4 | 211 | -29 | -175 | 106 |
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