Deferred Charges and Other Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Charges and Other Assets
Deferred turnaround and catalyst costs, net	$ 1,614	$ 1,484
Income taxes receivable	447	266
Investments in joint ventures	201	201
Intangible assets, net	148	156
Other	491	519
Deferred charges and other assets, net	2,901	2,626
Deferred Charges and Other Assets (Textual)
Amortization expense, deferred refinery turnaround and catalyst costs and other assets	$ 575	$ 542	$ 489