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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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