Summarized Financial Data - Chevron Transport Corporation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 55,660	[1]	$ 61,261	[1]	$ 174,336	[1]	$ 186,344	[1]
Costs and other deductions	48,112		51,092		147,001		156,052
Net loss attributable to CTC	5,253		7,829		18,934		21,772
Chevron Transport Corporation [Member]
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	119		182		513		604
Costs and other deductions	179		232		631		721
Net loss attributable to CTC	$ (58)		$ (47)		$ (114)		$ (114)

[1] * Includes excise, value-added and similar taxes:2,163 1,974 5,879 6,372