Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue Recognition [Abstract]

Disaggregation of Revenue by Segment

						Intersegment
(in millions)		E&P		Midstream		Revenues		Total
Three months ended March 31, 2018
Gas sales	$	535	$	–	$	5	$	540
Oil sales		34		–		1		35
NGL sales		65		–		–		65
Marketing		–		829		(576)		253
Gas gathering		–		67		(43)		24
Other (1)		3		–		–		3
Total	$	637	$	896	$	(613)	$	920
Three months ended March 31, 2017
Gas sales	$	500	$	–	$	3	$	503
Oil sales		23		–		–		23
NGL sales		40		–		–		40
Marketing		–		777		(524)		253
Gas gathering		–		81		(54)		27
Other		–		–		–		–
Total	$	563	$	858	$	(575)	$	846

(1) Other E&P revenues consists primarily of water sales to third-party operators.

Disaggregation of Revenue on Geographic Basis

	For the three months ended March 31,
(in millions)		2018		2017
Northeast Appalachia	$	327	$	253
Southwest Appalachia		156		104
Fayetteville Shale		152		205
Other		2		1
Total	$	637	$	563

Reconciliation of Accounts Receivable

(in millions)		March 31, 2018		December 31, 2017
Receivables from contracts with customers	$	273	$	322
Other accounts receivable		109		106
Total accounts receivable	$	382	$	428