v3.19.1

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Operating revenues
Financial derivatives	$ 84	$ 41
Total operating revenues	1,324	1,066
Operating expenses
Oil and natural gas purchases	3	2
Transportation costs	100	115
Lease operating expense	158	163
General and administrative	89	81
Depreciation, depletion and amortization	507	487
Gain on sale of assets	(3)	0
Impairment charges	1,103	2
Exploration and other expense	5	12
Taxes, other than income taxes	77	65
Total operating expenses	2,039	927
Operating (loss) income	(715)	139
Other income	4	0
Gain (loss) on extinguishment/modification of debt	73	(16)
Interest expense	(365)	(326)
Loss before income taxes	(1,003)	(203)
Income tax expense	0	0
Net loss	(1,003)	(203)
Oil
Operating revenues
Operating revenues	1,045	812
Natural gas
Operating revenues
Operating revenues	75	110
NGLs
Operating revenues
Operating revenues	$ 120	$ 103

Gain (Loss) On Extinguishment And Restructuring Of Debt

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Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

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Amount of operating lease expense. Excludes sublease income.

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The amount of expenses related to oil and gas producing activities.

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Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale.

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