Summarized Financial Data - Chevron U.S.A. Inc. - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Subsidiary Statements Captions [Line Items]
Current assets	$ 38,187		$ 41,128
Current liabilities	35,718		32,258
Total CUSA net equity	157,030	$ 160,263	161,929	$ 166,248	$ 159,298	$ 160,242
Chevron U.S.A. Inc.
Subsidiary Statements Captions [Line Items]
Current assets	18,855		19,489
Other assets	57,597		54,460
Current liabilities	22,115		20,624
Other liabilities	21,748		22,227
Total CUSA net equity	32,589		31,098
Memo: Total debt	$ 9,571		$ 9,740