Net Loss Per Share Attributable To Devon (Earnings Per Share Computations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Net loss:
Net loss attributable to Devon		$ (3,056)	$ (3,599)
Attributable to participating securities			(1)
Basic and diluted loss		$ (3,056)	$ (3,600)
Common shares:
Common shares outstanding - total		479	410
Attributable to participating securities		(5)	(4)
Common shares outstanding - basic		474	406
Common shares outstanding - diluted		474	406
Net loss per share attributable to Devon:
Basic		$ (6.44)	$ (8.88)
Diluted		$ (6.44)	$ (8.88)
Antidilutive options	[1]	3	4

[1] Amounts represent options to purchase shares of Devon's common stock that are excluded from the diluted net loss per share calculations because the options are antidilutive.