SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Asset Impairments Recorded in Connection with Fair Value Assessments (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Schedule Of Significant Accounting Policies [Line Items]
Goodwill impairment	$ 87,000,000	$ 0
Inventory and other, impairments	18,000,000	0
Impairments	4,472,000,000	0
Oil and gas proved property
Schedule Of Significant Accounting Policies [Line Items]
Tangible asset impairment charges	4,299,000,000	0
Gathering, processing, and transmission facilities
Schedule Of Significant Accounting Policies [Line Items]
Tangible asset impairment charges	68,000,000	$ 0
Impairments	$ 68,000,000

Inventory And Other, Impairments

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Schedule Of Significant Accounting Policies [Line Items]

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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