Consolidated Comprehensive Statements Of Earnings - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	[1]	Dec. 31, 2015	[1]
Income Statement [Abstract]
Upstream revenues	$ 5,307	$ 3,981		$ 5,885
Marketing and midstream revenues	8,642	6,323		7,260
Total revenues	13,949	10,304		13,145
Production expenses	1,823	1,803		2,439
Exploration expenses	380	215		451
Marketing and midstream expenses	7,730	5,533		6,461
Depreciation, depletion and amortization	2,074	2,096		4,022
Asset impairments	17	1,310		17,647
Asset dispositions	(217)	(1,483)		7
General and administrative expenses	872	865		1,193
Financing costs, net	498	907		519
Other expenses	(124)	375		264
Total expenses	13,053	11,621		33,003
Earnings (loss) before income taxes	896	(1,317)		(19,858)
Income tax expense (benefit)	(182)	141		(6,213)
Net earnings (loss)	1,078	(1,458)		(13,645)
Net earnings (loss) attributable to noncontrolling interests	180	(402)		(749)
Net earnings (loss) attributable to Devon	$ 898	$ (1,056)		$ (12,896)
Net earnings (loss) per share attributable to Devon:
Basic	$ 1.71	$ (2.09)		$ (31.72)
Diluted	$ 1.70	$ (2.09)		$ (31.72)
Comprehensive earnings (loss):
Net earnings (loss)	$ 1,078	$ (1,458)		$ (13,645)
Other comprehensive earnings, net of tax:
Foreign currency translation and other	83	11		(443)
Pension and postretirement plans	29	22		10
Other comprehensive earnings, net of tax	112	33		(433)
Comprehensive earnings (loss)	1,190	(1,425)		(14,078)
Comprehensive earnings (loss) attributable to noncontrolling interests	180	(402)		(749)
Comprehensive earnings (loss) attributable to Devon	$ 1,010	$ (1,023)		$ (13,329)

[1] Prior year amounts have been recast due to change in accounting principle. See Note 2 in “Item 8. Financial Statements and Supplementary Data” of this report.