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Investments and Advances (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Chevron |  |  |
Schedule of Investments [Line Items] |  |  |
Total revenues | $ 33,460 | $ 27,787 | $ 33,492
Income before income tax expense | 5,712 | 3,670 | 6,279
Net income attributable to affiliates | 4,468 | 2,876 | 4,691
Current assets | 13,568 | 13,743 | 10,657
Noncurrent assets | 32,643 | 28,854 | 26,607
Current liabilities | 10,201 | 8,996 | 7,351
Noncurrent liabilities | 4,224 | 4,255 | 3,909
Total net equity | 31,786 | 29,346 | 26,004
Affiliates |  |  |
Schedule of Investments [Line Items] |  |  |
Total revenues | 70,744 | 59,253 | 71,389
Income before income tax expense | 13,487 | 6,587 | 13,129
Net income attributable to affiliates | 10,751 | 5,127 | 10,649
Current assets | 33,883 | 33,406 | 27,162
Noncurrent assets | 82,261 | 75,258 | 71,650
Current liabilities | 26,873 | 24,793 | 20,559
Noncurrent liabilities | 21,447 | 22,671 | 18,560
Total net equity | $ 67,824 | $ 61,200 | $ 59,693

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