Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following table shows revenue disaggregated by operating area and product type, for the years ended December 31, 2019 and 2018:

	Year Ended December 31, 2019
	Oil			Natural Gas			NGL			Total
	($ in millions)
Marcellus	$	—		$	856		$	—		$	856
Haynesville	—			620			—			620
Eagle Ford	1,289			153			119			1,561
Brazos Valley	721			32			16			769
Powder River Basin	369			77			32			478
Mid-Continent	164			44			25			233
Revenue from contracts with customers	2,543			1,782			192			4,517
Gains (losses) on oil, natural gas and NGL derivatives	(212		)	217			—			5
Oil, natural gas and NGL revenue	$	2,331		$	1,999		$	192		$	4,522
Marketing revenue from contracts with customers	$	2,473		$	900		$	246		$	3,619
Other marketing revenue	311			41			—			352
Losses on marketing derivatives	—			(4		)	—			(4		)
Marketing revenue	$	2,784		$	937		$	246		$	3,967
	Year Ended December 31, 2018
	Oil			Natural Gas			NGL			Total
	($ in millions)
Marcellus	$	—		$	924		$	—		$	924
Haynesville	2			836			—			838
Eagle Ford	1,514			173			185			1,872
Powder River Basin	244			68			38			350
Mid-Continent	246			84			55			385
Utica	195			401			224			820
Revenue from contracts with customers	2,201			2,486			502			5,189
Gains (losses) on oil, natural gas and NGL derivatives	124			(147		)	(11		)	(34		)
Oil, natural gas and NGL revenue	$	2,325		$	2,339		$	491		$	5,155
Marketing revenue from contracts with customers	$	2,740		$	1,194		$	456		$	4,390
Other marketing revenue	457			222			—			679
Gains on marketing derivatives	—			7			—			7
Marketing revenue	$	3,197		$	1,423		$	456		$	5,076

Accounts receivable

Accounts receivable as of December 31, 2019 and 2018 are detailed below:

	December 31,
	2019			2018
	($ in millions)
Oil, natural gas and NGL sales	$	737		$	976
Joint interest billings	200			211
Other	74			77
Allowance for doubtful accounts	(21		)	(17		)
Total accounts receivable, net	$	990		$	1,247