Impairments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012 Aruba Refinery [Member]	Mar. 31, 2012 Aruba Refinery [Member]	Dec. 31, 2012 Aruba Refinery [Member]	Mar. 28, 2012 Aruba Refinery [Member]	Sep. 30, 2012 Refining Assets [Member]	Dec. 31, 2012 Refining Assets [Member]	Sep. 30, 2012 Inventory Related Assets [Member]	Dec. 31, 2012 Inventory Related Assets [Member]	Dec. 31, 2012 Construction in Progress [Member]	Dec. 31, 2012 Retail Assets [Member]
Impairments (Textual)
Non-binding purchase offer							$ 350
Asset impairment losses	$ 0	$ 1,014	$ 0	$ 333	$ 595	$ 928		$ 308	$ 903	$ 25	$ 25	$ 65	$ 21