Summarized Financial Data - Chevron Transport Corporation (Details 1) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Balance Sheet - Chevron Transport Corporation
Current assets	$ 53,503	$ 55,720
Current liabilities	33,470	34,212
Total Equity	146,073	137,832	134,222	122,181
Chevron Transport Corporation [Member]
Balance Sheet - Chevron Transport Corporation
Current assets	183	199
Other assets	407	313
Current liabilities	367	154
Other liabilities	409	415
Total Equity	$ (186)	$ (57)

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