Segment Information, Activity (Details) $ in Millions		3 Months Ended
		Mar. 31, 2017 USD ($) segments	Mar. 31, 2016 USD ($)
Segment Information for our Reportable Segments
Operating revenues	[1]	$ 21,772	$ 15,714
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		19,428	13,507
Lower of cost or market inventory valuation adjustment		0	(293)
Operating expenses		1,117	1,030
General and administrative expenses		190	156
Depreciation and amortization expense		500	485
Total costs and expenses		21,235	14,885
Operating income (loss)		$ 537	829
Disclosure of Entity's Reportable Segments (Textual)
Number of reportable segments | segments		3
Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Operating revenues		$ (166)	(113)
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		(166)	(113)
Corporate, Non-Segment [Member]
Segment Information for our Reportable Segments
Operating revenues		(166)	(113)
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		(166)	(113)
Operating expenses		0	0
General and administrative expenses		190	156
Depreciation and amortization expense		12	12
Total costs and expenses		36	55
Operating income (loss)		(202)	(168)
Refining [Member]
Segment Information for our Reportable Segments
Operating revenues		20,887	14,920
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		18,641	12,799
Refining [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Operating revenues		0	0
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		166	113
Refining [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Operating revenues		20,887	14,920
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		18,807	12,912
Lower of cost or market inventory valuation adjustment			(263)
Operating expenses		984	907
General and administrative expenses		0	0
Depreciation and amortization expense		449	449
Total costs and expenses		20,240	14,005
Operating income (loss)		647	915
Ethanol [Member]
Segment Information for our Reportable Segments
Operating revenues		885	794
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		787	708
Ethanol [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Operating revenues		60	34
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		0	0
Ethanol [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Operating revenues		945	828
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		787	708
Lower of cost or market inventory valuation adjustment			(30)
Operating expenses		109	99
General and administrative expenses		0	0
Depreciation and amortization expense		27	12
Total costs and expenses		923	789
Operating income (loss)		22	39
VLP [Member]
Segment Information for our Reportable Segments
Operating revenues		0	0
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		0	0
VLP [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Operating revenues		106	79
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		0	0
VLP [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Operating revenues		106	79
Cost of sales (excluding the lower of cost or market inventory valuation adjustment)		0	0
Lower of cost or market inventory valuation adjustment			0
Operating expenses		24	24	[2]
General and administrative expenses		0	0
Depreciation and amortization expense		12	12	[2]
Total costs and expenses		36	36
Operating income (loss)		$ 70	$ 43

[1] Includes excise taxes on sales by certain of our international operations of $1,272 million and $1,395 million for the three months ended March 31, 2017 and 2016, respectively.

[2] The VLP segment information for the three months ended March 31, 2016 has been retrospectively adjusted for VLP’s acquisitions that occurred subsequent to March 31, 2016.