Segment Information, Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Total Assets by Reportable Segment
Reportable segment assets	$ 47,988	$ 46,173
Corporate, Non-Segment [Member]
Total Assets by Reportable Segment
Reportable segment assets	6,109	5,790
Refining [Member] \| Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	39,450	38,095
Ethanol [Member] \| Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	1,319	1,316
VLP [Member] \| Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	$ 1,110	$ 972

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant