Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001035002 (http://www.sec.gov/CIK)

Inventory Disclosure [Abstract]	Period [Axis]
	2016-04-01 - 2016-06-30	2016-01-01 - 2016-12-31	2016-01-01 - 2016-03-31	2015-10-01 - 2015-12-31	2015-01-01 - 2015-12-31	2014-01-01 - 2014-12-31
Inventory Disclosure [Abstract]
Schedule of Inventories
Refinery feedstocks		2,068,000,000		2,404,000,000	2,404,000,000
Refined petroleum products and blendstocks		3,153,000,000		3,774,000,000	3,774,000,000
Ethanol feedstocks and products		238,000,000		242,000,000	242,000,000
Materials and supplies		250,000,000		244,000,000	244,000,000
Inventories, before lower of cost or market inventory valuation reserve		5,709,000,000		6,664,000,000	6,664,000,000
Lower of cost or market inventory valuation reserve		0		(766,000,000)	(766,000,000)
Inventories		5,709,000,000		5,898,000,000	5,898,000,000
Inventories (Textual)
Lower of cost or market inventory valuation reserve		0		766,000,000	766,000,000
Lower of cost or market inventory valuation adjustment	454,000,000	747,000,000	293,000,000	(790,000,000)	(790,000,000)	0
Effect of LIFO inventory liquidation on income		120,000,000
Excess of market value over carrying amount of LIFO inventories		1,900,000,000
Inventory not valued at LIFO		641,000,000		668,000,000	668,000,000