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Investments, Loans and Long-Term Receivables (Summary of Financial Information for Equity Method Investments) (Details) - WRB Refining LP And Chevron Phillips Chemical Company LLC [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Summary of financial information
Revenues	$ 4,778	$ 5,920	$ 8,468	$ 10,826
Income before income taxes	598	1,038	944	1,730
Net income	$ 575	$ 1,024	$ 904	$ 1,696

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- Definition

The amount of income (loss) from continuing operations before income taxes and extraordinary items reported by an equity method investment of the entity.

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- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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