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Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - Commodity Contract - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Natural Gas | Basis Swaps |  |
Financial Assets: |  |
Assets, fair value disclosure | $ 2 | $ 2
Natural Gas | Basis Swaps | Quoted Prices in Active Markets (Level 1) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 | 0
Natural Gas | Basis Swaps | Significant Other Observable Inputs (Level 2) |  |
Financial Assets: |  |
Assets, fair value disclosure | 2 | 2
Natural Gas | Basis Swaps | Significant Unobservable Inputs (Level 3) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 | 0
Natural Gas | Price Swaps |  |
Financial Liabilities: |  |
Liabilities, fair value disclosure | 71 | 104
Natural Gas | Price Swaps | Quoted Prices in Active Markets (Level 1) |  |
Financial Liabilities: |  |
Liabilities, fair value disclosure | 0 | 0
Natural Gas | Price Swaps | Significant Other Observable Inputs (Level 2) |  |
Financial Liabilities: |  |
Liabilities, fair value disclosure | 71 | 104
Natural Gas | Price Swaps | Significant Unobservable Inputs (Level 3) |  |
Financial Liabilities: |  |
Liabilities, fair value disclosure | 0 | 0
Natural Gas Swaps | Basis Swaps |  |
Financial Assets: |  |
Assets, fair value disclosure |  | 105
Natural Gas Swaps | Basis Swaps | Quoted Prices in Active Markets (Level 1) |  |
Financial Assets: |  |
Assets, fair value disclosure |  | 0
Natural Gas Swaps | Basis Swaps | Significant Other Observable Inputs (Level 2) |  |
Financial Assets: |  |
Assets, fair value disclosure |  | 105
Natural Gas Swaps | Basis Swaps | Significant Unobservable Inputs (Level 3) |  |
Financial Assets: |  |
Assets, fair value disclosure |  | $ 0
Natural Gas Swaps | Price Swaps |  |
Financial Assets: |  |
Assets, fair value disclosure | 109 |
Natural Gas Swaps | Price Swaps | Quoted Prices in Active Markets (Level 1) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 |
Natural Gas Swaps | Price Swaps | Significant Other Observable Inputs (Level 2) |  |
Financial Assets: |  |
Assets, fair value disclosure | 109 |
Natural Gas Swaps | Price Swaps | Significant Unobservable Inputs (Level 3) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 |
Brent Crude Oil (Brent) Linked Gas Sales Contract |  |
Financial Assets: |  |
Assets, fair value disclosure | 144 |
Brent Crude Oil (Brent) Linked Gas Sales Contract | Quoted Prices in Active Markets (Level 1) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 |
Brent Crude Oil (Brent) Linked Gas Sales Contract | Significant Other Observable Inputs (Level 2) |  |
Financial Assets: |  |
Assets, fair value disclosure | 0 |
Brent Crude Oil (Brent) Linked Gas Sales Contract | Significant Unobservable Inputs (Level 3) |  |
Financial Assets: |  |
Assets, fair value disclosure | $ 144 |

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