Goodwill

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

6.  Goodwill

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

	Exploration and Production		Midstream			Total
	(In millions)
Balance at January 1, 2017	$	—	$	375		$	375
Disposition		—		(15	)		(15	)
Balance at September 30, 2017	$	—	$	360		$	360

The change in the carrying amount of goodwill relates to the sale of our enhanced oil recovery assets in the Permian Basin. See Note 2, Disposition.