Summarized Financial Data - Chevron U.S.A. Inc. (Details 1) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Balance Sheet - Chevron U.S.A. Inc.
Current assets	$ 26,626	$ 29,619
Current liabilities	27,956	31,785
Total CUSA net equity	147,388	146,722	$ 148,325	$ 153,886
Chevron U.S.A. Inc.
Balance Sheet - Chevron U.S.A. Inc.
Current assets	10,051	11,266
Other assets	54,057	55,722
Current liabilities	13,739	16,660
Other liabilities	15,188	21,701
Total CUSA net equity	35,181	28,627
Memo: Total debt	$ 3,056	$ 9,418