Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Adoption of ASC 606

The adoption of ASC 606 as of January 1, 2018 had the following impact on the Company's results of operations for the three months ended March 31, 2018:

	Three Months Ended March 31, 2018
	As Reported		ASC 605 (Without Adoption of ASC 606)		Effect of Change Higher (Lower)
	(in millions)
Revenues and other income:
Oil and gas	$	1,266	$	1,223	$	43
Costs and expenses:
Oil and gas production	$	213	$	170	$	43

Disaggregation of Revenue

The following table provides information about disaggregated revenue from contracts with purchasers by product type:

	Three Months Ended March 31, 2018
	(in millions)
Oil sales	$	1,013
NGL sales	165
Gas sales	88
Total oil and gas sales	1,266
Sales of purchased oil and gas	1,070
Total revenue derived from contracts with purchasers	$	2,336