Acquisitions and Divestitures (Tables)

6 Months Ended

Jun. 30, 2017

Acquisitions and Divestitures [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The following table represents the allocation of the acquisition price to the assets acquired and the liabilities assumed based on their fair value at the acquisition date (in millions):

Assets acquired:
Proved properties	$	79
Unproved properties	347
Other property and equipment	5
Liabilities assumed:
Asset retirement obligations	(2		)
Other liabilities	(1		)
Net assets acquired	$	428