Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statements of operations was as follows:



	Before adoption of ASC 606		Adjustments			As Reported
			($ in millions)
Statement of Operations for the Year Ended December 31, 2018
Marketing revenues	$	5,871	$	(795	)	$	5,076
Marketing operating expenses	$	5,953	$	(795	)	$	5,158

Disaggregation of revenue

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



	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		229			—			686
Marketing revenue	$	3,197	$	1,423		$	456		$	5,076

Accounts receivable

Accounts receivable as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018			2017
	($ in millions)
Oil, natural gas and NGL sales	$	976		$	959
Joint interest billings	211			209
Other	77			184
Allowance for doubtful accounts	(17		)	(30		)
Total accounts receivable, net	$	1,247		$	1,322