Summarized Financial Data - Chevron Transport Corporation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 55,307	[1]	$ 59,780	[1]	$ 109,603	[1]	$ 118,676	[1]
Costs and other deductions	48,780		50,253		95,315		98,889
Net loss attributable to CTC	5,365		7,210		11,543		13,681
Chevron Transport Corporation [Member]
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	120		193		251		337
Costs and other deductions	164		214		336		398
Net loss attributable to CTC	$ (43)		$ (21)		$ (84)		$ (59)

[1] * Includes excise, value-added and similar taxes:$2,108 $1,929 $4,141 $3,716