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Debt And Related Expenses (Narrative) (Details) $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Aug. 01, 2023 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Debt Instrument [Line Items] |  |  |
Maturity date extension |  | In the first quarter of 2024, Devon exercised its option to extend the 2023 Senior Credit Facility maturity date from March 24, 2028 to March 24, 2029 |
Senior Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility, borrowing capacity |  |  | $ 3,000
Outstanding credit facility borrowings |  | $ 0 |
Debt-to-capitalization ratio |  | 0.212 |
Outstanding letters of credit |  | $ 3 |
Senior Credit Facility [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt-to-capitalization ratio |  | 0.65 |
8.25% due August 1, 2023 [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of long-term debt | $ 242 |  |
Debt interest rate, stated percentage | 8.25% |  |

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