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Summarized Financial Data - Chevron U.S.A. Inc. (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Statement of Income - Chevron U.S.A. Inc.        
Sales and other operating revenues $ 66,671 [1] $ 51,051 [1] $ 125,083 [1] $ 97,792 [1]
Total costs and other deductions 55,741 44,238 104,960 84,767
Net income (loss) attributable to CUSA 7,732 5,409 13,943 9,961
Chevron U.S.A. Inc. [Member]
       
Statement of Income - Chevron U.S.A. Inc.        
Sales and other operating revenues     94,913 71,612
Total costs and other deductions     89,966 68,934
Net income (loss) attributable to CUSA     $ 3,690 $ 2,019
[1] Includes excise, value-added and similar taxes.