Summarized Financial Data - Chevron Transport Corporation (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Balance Sheet - Chevron Transport Corporation
Current assets	$ 49,749	$ 50,250
Current liabilities	35,652	33,018
Total Equity	151,810	150,427	141,486	137,832
Chevron Transport Corporation [Member]
Balance Sheet - Chevron Transport Corporation
Current assets	234	221
Other assets	582	549
Current liabilities	174	94
Other liabilities	900	911
Total Equity	$ (258)	$ (235)