Goodwill (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill were as follows:

	Exploration and Production			Bakken Midstream		Total
	(In millions)
Balance at January 1, 2015	$	1,858		$	—	$	1,858
Reclassification		(375	)		375		—
Impairment		(1,483	)		—		(1,483	)
Balance at December 31, 2015		—			375		375
Reclassification		—			—		—
Impairment		—			—		—
Balance at December 31, 2016	$	—		$	375	$	375