Summarized Financial Data - Chevron U.S.A. Inc. - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Subsidiary Statements Captions [Line Items]
Current assets	$ 39,369		$ 41,128
Current liabilities	34,027		32,258
Total CUSA net equity	160,263	$ 161,656	161,929	$ 159,298	$ 160,434	$ 160,242
Chevron U.S.A. Inc.
Subsidiary Statements Captions [Line Items]
Current assets	22,046		19,489
Other assets	56,732		54,460
Current liabilities	25,011		20,624
Other liabilities	22,036		22,227
Total CUSA net equity	31,731		31,098
Memo: Total debt	$ 9,888		$ 9,740