Summarized Financial Data - Chevron U.S.A. Inc. (Details 1) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Balance Sheet - Chevron U.S.A. Inc.
Current assets	$ 31,726	$ 28,560
Current liabilities	30,630	27,737
Total CUSA net equity	151,566	149,319	$ 147,790	$ 146,722
Chevron U.S.A. Inc.
Balance Sheet - Chevron U.S.A. Inc.
Current assets	13,406	12,163
Other assets	55,482	54,994
Current liabilities	17,606	17,379
Other liabilities	12,623	12,541
Total CUSA net equity	38,659	37,237
Memo: Total debt	$ 3,050	$ 3,056

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