Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues and other income:
Revenue	$ 2,010	$ 2,244
Interest and other income (loss), net	(206)	191
Derivative gain (loss), net	453	(13)
Loss on disposition of assets, net	0	(9)
Total revenues and other income	2,257	2,413
Costs and expenses:
Production and ad valorem taxes	75	68
Depletion, depreciation and amortization	434	421
Exploration and abandonments	9	20
General and administrative	56	94
Accretion of discount on asset retirement obligations	2	3
Interest	27	29
Other	85	147
Costs and Expenses	1,892	1,960
Income before income taxes	365	453
Income tax provision	76	103
Net income attributable to common stockholders	$ 289	$ 350
Net income per share attributable to common stockholders:
Basic and diluted net income per share attributable to common stockholders	$ 1.74	$ 2.06
Weighted average shares outstanding:
Basic and diluted weighted average shares outstanding	166	169
Dividends declared per share	$ 0.55	$ 0.32
Oil and gas
Revenues and other income:
Revenue	$ 1,095	$ 1,135
Costs and expenses:
Costs and expenses	176	221
Sales of purchased oil and gas
Revenues and other income:
Revenue	915	1,109
Costs and expenses:
Costs and expenses	$ 1,028	$ 957