Summarized Financial Data - Tengizchevroil LLP (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Affiliate Statements Captions [Line Items]
Percentage of affiliate by summarized financial information		100.00%
Tengizchevroil LLP [Member]
Affiliate Statements Captions [Line Items]
Percentage of affiliate by summarized financial information	100.00%
Sales and other operating revenues	$ 10,460	$ 12,811	$ 22,813
Costs and other deductions	6,822	7,257	10,275
Net income attributable to TCO	$ 2,563	$ 3,897	$ 8,772
Tengizchevroil LLP [Member]
Affiliate Statements Captions [Line Items]
Equity method investment, ownership percentage	50.00%

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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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