Summarized Financial Data - Tengizchevroil LLP (Details 1) - Tengizchevroil LLP [Member] - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Affiliate Statements Captions [Line Items]
Current assets	$ 7,001	$ 2,098
Other assets	20,476	17,094
Current liabilities	2,841	1,063
Other liabilities	6,210	2,266
Total net equity	$ 18,426	$ 15,863