Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Extractive Industries [Abstract]

Schedule of Aggregate Capitalized Costs Related to Oil and Gas and Non-oil and Gas Activities

	December 31, 2017
	U.S.			Canada			Total
Proved	$	40,491		$	6,804		$	47,295
Unproved and properties under development		984			1,473			2,457
Total oil and gas		41,475			8,277			49,752
Accumulated DD&A		(32,379	)		(4,055	)		(36,434	)
Oil and gas property and equipment, net	$	9,096		$	4,222		$	13,318
	December 31, 2016
	U.S.			Canada			Total
Proved	$	38,842		$	6,163		$	45,005
Unproved and properties under development		2,115			1,277			3,392
Total oil and gas		40,957			7,440			48,397
Accumulated DD&A		(31,979	)		(3,420	)		(35,399	)
Oil and gas property and equipment, net	$	8,978		$	4,020		$	12,998

Schedule of Property, Plant and Equipment Other

	December 31,
	2017			2016
EnLink	$	9,120		$	8,381
Devon		1,955			1,919
Total midstream and other		11,075			10,300
EnLink		(2,533	)		(2,124	)
Devon		(689	)		(641	)
Total accumulated DD&A		(3,222	)		(2,765	)
Midstream and other property and equipment, net	$	7,853		$	7,535

Summary of Changes in Suspended Exploratory Well Costs

	Year Ended December 31,
	2017			2016			2015
Beginning balance	$	261		$	225		$	199
Additions pending determination of proved reserves		504			247			348
Charges to exploration expense		—			(29	)		(5	)
Reclassifications to proved properties		(466	)		(189	)		(285	)
Foreign currency translation adjustment		14			7			(32	)
Ending balance	$	313		$	261		$	225

Schedule of Aging of Capitalized Exploratory Well Costs

	Year Ended December 31,
	2017		2016		2015
Exploratory well costs capitalized for a period of one year or less	$	113	$	88	$	60
Exploratory well costs capitalized for a period greater than one year		200		173		165
Ending balance	$	313	$	261	$	225
Number of projects with exploratory well costs capitalized for a    period greater than one year		2		2		2