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Derivatives and Financial Instruments (Summary of Gains/(Losses) From Commodity Derivatives) (Details) - Commodity derivatives - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sales and other operating revenues
Summary of gains (losses) from commodity derivatives
Gains (losses) from commodity derivatives	$ (451)	$ 162	$ 658
Equity in earnings of affiliates
Summary of gains (losses) from commodity derivatives
Gains (losses) from commodity derivatives	0	0	66
Other income
Summary of gains (losses) from commodity derivatives
Gains (losses) from commodity derivatives	29	58	20
Purchased crude oil and products
Summary of gains (losses) from commodity derivatives
Gains (losses) from commodity derivatives	$ (62)	$ 121	$ 136

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- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of price risk derivatives not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

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