Acquisitions (Details) (USD $)	12 Months Ended				0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 01, 2011	Oct. 02, 2011 Meraux Acquisition [Member]	Dec. 31, 2012 Meraux Acquisition [Member]	Dec. 31, 2011 Meraux Acquisition [Member]	Aug. 01, 2011 Pembroke Acquisition [Member]	Sep. 30, 2012 Pembroke Acquisition [Member]	Dec. 31, 2011 Pembroke Acquisition [Member]
Purchase Price Allocation
Current assets, net of cash acquired									$ 2,215,000,000
Inventories						227,000,000
Property, plant, and equipment						293,000,000			947,000,000
Intangible assets									22,000,000
Deferred charges and other assets, net						28,000,000			37,000,000
Current liabilities, less current portion of debt and capital lease obligations									(1,294,000,000)
Debt and capital leases assumed, including current portion									(12,000,000)
Deferred income taxes									(159,000,000)
Other long-term liabilities						(1,000,000)			(60,000,000)
Noncontrolling interest									(5,000,000)
Purchase price, net of cash acquired						547,000,000			1,691,000,000
Acquisitions (Textual)
Effective date of acquisition					Oct. 01, 2011			Aug. 01, 2011
Purchase price of acquired entity					586,000,000			1,800,000,000
Throughput capacity of petroleum refining (in barrels per day)					135,000			270,000
Acquisition of Meraux Refinery	0	0	547,000,000				547,000,000
Purchase price allocation adjustment to inventory						8,000,000
Purchase price allocation adjustment to property, plant, and equipment						(27,000,000)			143,000,000
Purchase price allocation adjustment to deferred charges and other assets						19,000,000
Percentage of outstanding shares acquired								100.00%
Purchase price of working capital								1,100,000,000
Acquisition of Pembroke Refinery, net of cash acquired	0	0	1,691,000,000							1,700,000,000
Purchase price allocation adjustment increase to deferred tax liabilities									124,000,000
Purchase price allocation adjustment increase to other long-term liabilities									17,000,000
Depreciation expense true-up	$ 1,720,000,000	$ 1,574,000,000	$ 1,534,000,000						$ 6,000,000
Joint venture ownership percentage			15.00%	85.00%