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Segment Disclosures and Related Information (Narrative) (Details)	6 Months Ended
	Jun. 30, 2016 refinery
Midstream Segment [Member] | DCP Midstream [Member]
Segment Disclosures And Related Information (Textual) [Abstract]
Percentage of ownership interest	50.00%
Chemicals Segment [Member] | CP Chem [Member]
Segment Disclosures And Related Information (Textual) [Abstract]
Percentage of ownership interest	50.00%
Refining [Member] | Mainly United States And Europe [Member]
Segment Disclosures And Related Information (Textual) [Abstract]
Number of refineries	14

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Segment disclosures and related information.

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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=6382943&loc=d3e33918-111571

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