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Income Taxes - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
State tax effected net operating losses |  |  |  |
Valuation allowance on operating loss carryforwards | $ 8 |  |  |
Unrecognized tax benefits | 16 | $ 20 | $ 13 | $ 7
Liability for accrued interest | 4 |  |  |
Capital loss carryforward |  |  |  |
State tax effected net operating losses |  |  |  |
Other credit carryforwards | 11 |  |  |
Marginal Well Credits |  |  |  |
State tax effected net operating losses |  |  |  |
Other credit carryforwards | 4 |  |  |
Research and development tax credits |  |  |  |
State tax effected net operating losses |  |  |  |
Unrecognized tax benefits | 3 |  |  |
Federal |  |  |  |
State tax effected net operating losses |  |  |  |
Net operating loss carryforwards | 357 |  |  |
NOL subject to expiration | 293 |  |  |
NOL not subject to expiration | 65 |  |  |
NOL net of valuations | 319 |  |  |
Valuation allowance on operating loss carryforwards | 38 |  |  |
State |  |  |  |
State tax effected net operating losses |  |  |  |
Net operating loss carryforwards | 2,600 |  |  |
NOL net of valuations | 936 |  |  |
Valuation allowance on operating loss carryforwards | 60 |  |  |
State | Capital loss carryforward |  |  |  |
State tax effected net operating losses |  |  |  |
Tax credit carryforwards valuation allowance | 4 |  |  |
Cimarex | Research and development tax credits |  |  |  |
State tax effected net operating losses |  |  |  |
Unrecognized tax benefits | $ 7 |  |  |

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