Summarized Financial Data - Chevron Transport Corporation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 55,583	[1],[2]	$ 55,307	[1],[2]	$ 106,561	[1],[2]	$ 109,603	[1],[2]
Costs and other deductions	48,911		48,780		94,248		95,315
Net loss attributable to CTC	5,665	[1]	5,365	[1]	10,177	[1]	11,543	[1]
Chevron Transport Corporation [Member]
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	133		120		306		251
Costs and other deductions	176		164		375		336
Net loss attributable to CTC	$ (43)		$ (43)		$ (69)		$ (84)

[1] Effective January 1, 2014, International Upstream prospectively includes selected amounts previously recognized in International Downstream, which are not material to the company’s results of operations or financial position.

[2] * Includes excise, value-added and similar taxes:$2,120 $2,108 $4,066 $4,141