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Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue by Segment
Revenues	[1]	$ 30,849	$ 23,562	$ 88,303	$ 67,588
Corporate, Reconciling Items And Eliminations [Member]
Revenue by Segment
Revenues		(212)	(159)	(570)	(463)
Corporate [Member]
Revenue by Segment
Revenues		1	0	3	0
Elimination of Intersegment Revenues [Member]
Revenue by Segment
Revenues		(213)	(159)	(573)	(463)
Corporate - Other Revenues [Member] | Corporate [Member]
Revenue by Segment
Revenues		1	0	3	0
Refining [Member]
Revenue by Segment
Revenues		29,984	22,728	85,675	65,030
Refining [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		29,989	22,729	85,685	65,031
Refining [Member] | Elimination of Intersegment Revenues [Member]
Revenue by Segment
Revenues		5	1	10	1
Refining [Member] | Gasoline and Blendstocks [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		12,664	10,310	35,810	29,368
Refining [Member] | Distillates [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		14,052	10,477	41,169	29,909
Refining [Member] | Other Product Revenues [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		3,273	1,942	8,706	5,754
Ethanol [Member]
Revenue by Segment
Revenues		864	834	2,625	2,558
Ethanol [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		932	882	2,781	2,694
Ethanol [Member] | Elimination of Intersegment Revenues [Member]
Revenue by Segment
Revenues		68	48	156	136
Ethanol [Member] | Ethanol [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		755	740	2,240	2,290
Ethanol [Member] | Distillers Grains [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		177	142	541	404
VLP [Member]
Revenue by Segment
Revenues		0	0	0	0
VLP [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		140	110	407	326
VLP [Member] | Elimination of Intersegment Revenues [Member]
Revenue by Segment
Revenues		140	110	407	326
VLP [Member] | Pipeline Transportation [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		31	23	93	71
VLP [Member] | Terminaling [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		107	86	309	253
VLP [Member] | Storage and Other [Member] | Operating Segments [Member]
Revenue by Segment
Revenues		$ 2	$ 1	$ 5	$ 2
[1] Includes excise taxes on sales by certain of our international operations of $1,338 million and $1,447 million for the three months ended September 30, 2018 and 2017, respectively, and $4,272 million and $4,103 million for the nine months ended September 30, 2018 and 2017, respectively.

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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.

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