Summarized Financial Data - Tengizchevroil LLP (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Affiliate Statements Captions [Line Items]
Percentage of affiliate by summarized financial information	100.00%
Tengizchevroil LLP [Member]
Affiliate Statements Captions [Line Items]
Sales and other operating revenues	$ 25,239	$ 23,089	$ 25,278
Costs and other deductions	11,173	10,064	10,941
Net income attributable to TCO	$ 9,855	$ 9,119	$ 10,039
Tengizchevroil LLP [Member]
Affiliate Statements Captions [Line Items]
Equity method investment, ownership percentage	50.00%
Percentage of affiliate by summarized financial information	100.00%

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Percentage of affiliate by summarized financial 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.

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The amount of the cost of sales 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.

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- Definition

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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