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Leases (Schedule of Right-of-use Assets and Lease Liabilities) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Leases [Abstract] |  |  |
Right-of-use assets, finance lease |  | $ 17 | $ 248
Finance lease liabilities: |  |  |
Current lease liabilities, finance lease | [1] | 5 | 25
Long-term lease liabilities, finance lease |  | 12 | 293
Total lease liabilities, finance lease | [2] | 17 | 318
Right-of-use assets, operating lease |  | 230 | 55
Operating lease liabilities: |  |  |
Current lease liabilities, operating lease | [1] | 84 | 28
Long-term lease liabilities, operating lease |  | 146 | 27
Total lease liabilities, operating lease | [2] | 230 | 55
Right-of-use assets |  | 247 | 303
Lease liabilities: |  |  |
Current lease liabilities | [1] | 89 | 53
Long-term lease liabilities |  | 158 | 320
Total lease liabilities | [2] | $ 247 | $ 373
[1] | Current lease liabilities are included in other current liabilities on the consolidated balance sheets
[2] | Devon has entered into certain leases of equipment related to the exploration, development and production of oil and gas that had terms not yet commenced as of September 30, 2025 and are therefore excluded from the amounts shown above.

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