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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Oct. 01, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
State tax effected net operating losses |  |  |  |  |
Deferred tax liabilities, net | $ 3,101 |  | $ 774 |  |
Unrealized gain (loss) on investments | 130 |  |  |  |
Gain investments | 2,800 |  |  |  |
Net operating loss carryforwards | 69 |  |  |  |
Other credit carryforwards | 10 |  | 0 |  |
Unrecognized tax benefits | 7 |  | $ 6 | $ 1 | $ 17
Liability for accrued interest | 1 |  |  |  |
Cimarex |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Deferred income taxes | 2,200 | $ 2,201 |  |  |
State |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Net operating loss carryforwards | 3,000 |  |  |  |
Valuation allowance on operating loss carryforwards | 136 |  |  |  |
Federal |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Net operating loss carryforwards | 1,100 |  |  |  |
NOL not subject to expiration | 224 |  |  |  |
Federal | Cimarex |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Net operating loss carryforwards |  | $ 1,300 |  |  |
Federal | Tax Years 2034 Through 2037 |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Net operating loss carryforwards | 875 |  |  |  |
Capital loss carryforward |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Other credit carryforwards | 135 |  |  |  |
Tax credit carryforwards valuation allowance | 29 |  |  |  |
Capital loss carryforward | Tax Year 2022 |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Other credit carryforwards | 64 |  |  |  |
Capital loss carryforward | Tax Year 2025 |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Other credit carryforwards | 71 |  |  |  |
Research and development tax credits |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Unrecognized tax benefits | 1 |  |  |  |
Marginal Well Credits |  |  |  |  |
State tax effected net operating losses |  |  |  |  |
Other credit carryforwards | 10 |  |  |  |
Tax credit carryforwards valuation allowance | $ 4 |  |  |  |

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