Fair Value Measurements, Nonrecurring (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						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member]	Sep. 30, 2012 Aruba Refinery [Member]	Mar. 31, 2012 Aruba Refinery [Member]	Dec. 31, 2012 Aruba Refinery [Member]	Dec. 31, 2012 Aruba Refinery [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2012 Aruba Refinery [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Aruba Refinery [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Aruba Refinery [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [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 Construction in Progress [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2012 Construction in Progress [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Construction in Progress [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Construction in Progress [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Retail Assets [Member]	Dec. 31, 2012 Retail Assets [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2012 Retail Assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Retail Assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Retail Assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]
Assets:
Long-lived assets, fair value									$ 0	$ 0	$ 0	$ 0						$ 2	$ 0	$ 0	$ 2		$ 8	$ 0	$ 0	$ 8
Materials and supplies inventories	5,758	5,973							0	0	0	0
Asset impairment losses	0	1,014	0			333	595	928					308	903	25	25	65					21
Fair Value Measurements (Textual)
Assets measured at fair value, nonrecurring				0
Liabilities measured at fair value, nonrecurring				$ 0	$ 0