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Summarized Financial Data - Chevron U.S.A. Inc. (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Statement of Income - Chevron U.S.A. Inc. |  |  |
Sales and other operating revenues | [1] | $ 35,968 | $ 31,524
Costs and other deductions |  | 32,691 | 30,292
Net income attributable to CUSA |  | 3,638 | 2,682
Includes excise, value-added and similar taxes |  |  | 1,677
Chevron U.S.A. Inc. |  |  |
Statement of Income - Chevron U.S.A. Inc. |  |  |
Sales and other operating revenues |  | 28,058 | 24,408
Costs and other deductions |  | 27,596 | 24,099
Net income attributable to CUSA |  | $ 697 | 421
Includes excise, value-added and similar taxes |  |  | $ 1,207
[1] | 2017 includes excise, value-added and similar taxes of $1,677 million collected on behalf of third parties. Beginning in 2018, these taxes are netted in "Taxes other than on income" in accordance with ASU 2014-09. Refer to Note 17, "Revenue" beginning on page 24.

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