Goodwill (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows (in millions):

	Exploration and Production			Bakken Midstream		Total
Beginning balance at January 1	$	1,858		$	—	$	1,858
Reclassification		(375	)		375		—
Impairment		(385	)		—		(385	)
Ending balance at June 30, 2015	$	1,098		$	375	$	1,473