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Summarized Financial Data - Tengizchevroil LLP (Details 1) - Tengizchevroil LLP - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
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Current assets	$ 4,239	$ 7,001
Other assets	26,411	20,476
Current liabilities	2,517	2,841
Other liabilities	6,266	6,210
Total net equity	$ 21,867	$ 18,426

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