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Segment Disclosures and Related Information (Narrative) (Details)	6 Months Ended
	Jun. 30, 2020 refinery
Midstream | DCP Midstream
Segment Reporting Information [Line Items]
Percentage of ownership interest	50.00%
Chemicals | CPChem
Segment Reporting Information [Line Items]
Percentage of ownership interest	50.00%
Refining | Mainly United States And Europe
Segment Reporting Information [Line Items]
Number of refineries	13

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Refineries Owned or Jointly Owned by Entity

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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