Accounts Receivable

12 Months Ended

Dec. 31, 2017

Accounts Receivable Net [Abstract]

Accounts Receivable

12. Accounts Receivable

Components of accounts receivable include the following:

	December 31, 2017			December 31, 2016
Oil, gas and NGL sales	$	559		$	487
Joint interest billings		134			110
Marketing and midstream revenues		959			708
Other		29			69
Gross accounts receivable		1,681			1,374
Allowance for doubtful accounts		(11	)		(18	)
Net accounts receivable	$	1,670		$	1,356