Summarized Financial Data - Chevron U.S.A. Inc. - Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Subsidiary Statements Captions [Line Items]
Current assets	$ 40,508	$ 41,128
Current liabilities	32,940	32,258
Total CUSA net equity	161,656	161,929	$ 160,434	$ 160,242
Chevron U.S.A. Inc.
Subsidiary Statements Captions [Line Items]
Current assets	20,226	19,489
Other assets	55,706	54,460
Current liabilities	23,237	20,624
Other liabilities	22,314	22,227
Total CUSA net equity	30,381	31,098
Memo: Total debt	$ 9,670	$ 9,740