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Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Revenue by Segment
Revenues	[1]	$ 22,102	$ 24,263
Refining [Member]
Revenue by Segment
Revenues		20,985	23,218
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		8,244	9,374
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		10,663	11,917
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		2,078	1,927
Renewable Diesel [Member]
Revenue by Segment
Revenues		306	252
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		306	252
Ethanol [Member]
Revenue by Segment
Revenues		811	793
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		629	620
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 182	$ 173
[1] Includes excise taxes on sales by certain of our international operations of $1,368 million and $1,330 million for the three months ended March 31, 2020 and 2019, respectively.

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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