Deferred Charges and Other Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Charges and Other Assets
Deferred turnaround and catalyst costs, net	$ 1,484	$ 1,359
Income taxes receivable	266	182
Investments in joint ventures	201	78
Intangible assets, net	156	154
Re-imaging costs, net	154	141
Other	407	287
Deferred charges and other assets, net	2,668	2,201
Deferred Charges and Other Assets (Textual)
Amortization expense, deferred refinery turnaround and catalyst costs and other assets	$ 542	$ 489	$ 498