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Summarized Financial Data - Chevron U.S.A. Inc. - Income Statement (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Sales and other operating revenues | $ 29,705 | $ 34,189
Costs and other deductions | 27,356 | 31,243
Net income attributable to CUSA | 3,599 | 2,649
Chevron U.S.A. Inc. |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Sales and other operating revenues | 22,039 | 25,942
Costs and other deductions | 21,281 | 25,757
Net income attributable to CUSA | $ 860 | $ 181

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