(4)Revenue

(a) Disaggregation of Revenue

In the following table, revenue is disaggregated by type (in thousands). The table also identifies the reportable segment to which the disaggregated revenues relate. For more information on reportable segments, see Note 16—Segment Information.


	Year Ended December 31,						Segment to which
	2016		2017		2018		revenues relate
Revenues from contracts with customers:
Natural gas sales	$	1,260,750		1,769,284		2,287,939	Exploration and production
Natural gas liquids sales (ethane)		52,949		93,041		172,653	Exploration and production
Natural gas liquids sales (C3+ NGLs)		380,043		777,400		1,005,124	Exploration and production
Oil sales		61,319		108,195		187,178	Exploration and production
Gathering and compression		12,169		11,386		17,817	Gathering and processing
Water handling and treatment		792		1,334		3,527	Water handling and treatment
Marketing		393,049		258,045		458,901	Marketing
Total		2,161,071		3,018,685		4,133,139
Income from derivatives and other sources		(416,546)		636,889		6,487
Total revenue and other	$	1,744,525		3,655,574		4,139,626

(b) Transaction Price Allocated to Remaining Performance Obligations

For our product sales that have a contract term greater than one year, we have utilized the practical expedient in ASC 606, which does not require the disclosure of the transaction price allocated to remaining performance obligations if the variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under our product sales contracts, each unit of product delivered to the customer represents a separate performance obligation; therefore, future volumes are wholly unsatisfied and disclosure of the transaction price allocated to remaining performance obligations is not required. For our product sales that have a contract term of one year or less, we have utilized the practical expedient in ASC 606, which does not require the disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less.

Under our sales contracts, we invoice customers after our performance obligations have been satisfied, at which point payment is unconditional. Accordingly, our contracts do not give rise to contract assets or liabilities under ASC 606. At December 31, 2017 and 2018, our receivables from contracts with customers were $300 million and $475 million, respectively.