Summarized Financial Data - Chevron Transport Corporation (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Balance Sheet - Chevron Transport Corporation
Current assets	$ 55,222	$ 53,234
Current liabilities	34,257	33,600
Total Equity	126,326	122,181	110,850	105,811
Chevron Transport Corporation [Member]
Balance Sheet - Chevron Transport Corporation
Current assets	256	290
Other assets	227	228
Current liabilities	120	114
Other liabilities	340	346
Total Equity	$ 23	$ 58