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Summarized Financial Data - Chevron U.S.A. Inc. (Details 1) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2010
Dec. 31, 2009
Balance Sheet - Chevron U.S.A. Inc.        
Current assets $ 54,006 $ 48,841    
Current liabilities 35,220 29,012    
Total CUSA net equity 116,430 105,811 100,291 92,561
Chevron U.S.A. Inc. [Member]
       
Balance Sheet - Chevron U.S.A. Inc.        
Current assets 34,569 29,211    
Other assets 44,212 35,294    
Current liabilities 20,890 18,098    
Other liabilities 24,314 16,785    
Total CUSA net equity 33,577 29,622    
Memo: Total debt $ 14,382 $ 8,284