Summarized Financial Data - Chevron U.S.A. Inc. - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Subsidiary Statements Captions [Line Items]
Current assets	$ 42,790		$ 50,343
Current liabilities	29,847		34,208
Total CUSA net equity	159,298	$ 160,434	160,242	$ 154,562	$ 147,100	$ 139,940
Chevron U.S.A. Inc.
Subsidiary Statements Captions [Line Items]
Current assets	19,663		18,704
Other assets	52,440		50,153
Current liabilities	21,046		22,452
Other liabilities	19,925		19,274
Total CUSA net equity	31,132		27,131
Memo: Total debt	$ 10,708		$ 10,800