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Basis of Presentation (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reclassification out of inventory	$ (211)	$ (373)
Reclassification to other long-term assets	$ 404	295
Reclassification Adjustment | Catalyst Inventory
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reclassification out of inventory		17
Reclassification to other long-term assets		$ 17

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
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Amount of noncurrent assets classified as other.

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