Summarized Financial Data - Chevron Transport Corporation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 244,371	[1]	$ 198,198	[1]	$ 167,402	[1]
Total costs and other deductions	206,072		172,873		153,108
Net income	26,895		19,024		10,483
Chevron Transport Corporation [Member]
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	793		885		683
Total costs and other deductions	974		1,008		810
Net income	$ (177)		$ (116)		$ (124)

[1] Includes excise, value-added and similar taxes.