Summarized Financial Data - Chevron U.S.A. Inc. (Details 1) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Balance Sheet - Chevron U.S.A. Inc.
Current assets	$ 29,398	$ 29,619
Current liabilities	28,223	31,785
Total CUSA net equity	147,911	146,722	$ 147,952	$ 153,886
Chevron U.S.A. Inc.
Balance Sheet - Chevron U.S.A. Inc.
Current assets	11,566	11,266
Other assets	53,826	55,722
Current liabilities	15,777	16,660
Other liabilities	15,337	21,701
Total CUSA net equity	34,278	28,627
Memo: Total debt	$ 3,057	$ 9,418

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