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Segment Disclosures and Related Information (Narrative) (Details) - refinery	1 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2016
Segment Disclosures and Related Information (Textual) [Abstract]
Number of refineries	1
Refining | Mainly United States And Europe
Segment Disclosures and Related Information (Textual) [Abstract]
Number of refineries		13
DCP Midstream
Segment Disclosures and Related Information (Textual) [Abstract]
Equity investment		50.00%
DCP Midstream | Midstream
Segment Disclosures and Related Information (Textual) [Abstract]
Equity investment		50.00%
CP Chem
Segment Disclosures and Related Information (Textual) [Abstract]
Equity investment		50.00%
CP Chem | Chemicals
Segment Disclosures and Related Information (Textual) [Abstract]
Equity investment		50.00%

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Refineries Owned by Entity

+ References

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Segment disclosures and related information.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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