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Acquisition and Divestitures (Schedule of WPX Revenue and Earnings Included In Devons Consolidated Comprehensive Statements Of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Total revenues	$ 2,417	$ 394	$ 4,467	$ 2,481
Net earnings (loss)	261	$ (668)	477	$ (2,483)
WPX
Business Acquisition [Line Items]
Total revenues	1,353		2,413
Net earnings (loss)	$ 389		$ 555

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