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Debt And Related Expenses (Narrative) (Details) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 15, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 27, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Long-term Debt |  | $ 472 | $ 242 | $ 0 |
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 |  |  |
Credit Facility, Commitment Fee |  | $ 5 |  |  |
Commercial paper |  | 0 |  |  |
Commercial Paper [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit Facility, borrowing capacity |  | 3,000 |  |  |
Senior Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit Facility, borrowing capacity |  |  | $ 3,000 |  |
Outstanding credit facility borrowings |  | 0 |  |  |
Outstanding letters of credit |  | $ 4 |  |  |
Debt-to-capitalization ratio |  | 0.265 |  |  |
Senior Credit Facility [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt-to-capitalization ratio |  | 0.65 |  |  |
Term Loan Credit Agreement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding credit facility borrowings |  |  |  |  | $ 1,000
Debt-to-capitalization ratio |  | 0.265 |  |  |
Aggregate Principal Amount |  | $ 2,000 |  |  |
Interest rate on the term loan |  | 5.81% |  |  |
Term Loan Credit Agreement [Member] | Tranche One [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate Principal Amount |  | $ 500,000 |  |  |
Term Loan Credit Agreement [Member] | Tranche Two [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate Principal Amount |  | $ 1,500 |  |  |
5.20% due 2034 [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt interest rate, stated percentage |  | 5.20% |  |  |
Issuance of Senior Long-Term Debt |  | $ 1,250 |  |  |
5.75% due 2054 [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt interest rate, stated percentage |  | 5.75% |  |  |
Issuance of Senior Long-Term Debt |  | $ 1,000 |  |  |
5.25% due September 15, 2024 [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Long-term Debt | $ 472 |  |  |  |
Debt interest rate, stated percentage | 5.25% |  |  |  |
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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