Impairments (Details) $ in Millions	9 Months Ended
Sep. 30, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Future commodity prices escalated by an inflationary rate, period	2 years
Proved oil and natural gas properties
Property, Plant and Equipment [Line Items]
Rate used to discount expected future net cash flows	11.00%
Total impairments	$ 8,446
Sand Mine
Property, Plant and Equipment [Line Items]
Total impairments	$ 76

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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