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Variable Interest Entities, Consolidated (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 4,451 | $ 5,850 | $ 5,207 | $ 4,816
Property, plant, and equipment, net | 28,180 | 27,480 |  |
Liabilities |  |  |  |
Current liabilities | 11,341 | 11,071 |  |
Debt and capital lease obligations, less current portion | 8,876 | 8,750 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 283 | 179 |  |
Other current assets | 64 | 72 |  |
Property, plant, and equipment, net | 2,168 | 2,029 |  |
Liabilities |  |  |  |
Current liabilities | 125 | 95 |  |
Debt and capital lease obligations, less current portion | 1,027 | 948 |  |
Valero Energy Partners LP [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 100 | 42 |  |
Other current assets | 1 | 2 |  |
Property, plant, and equipment, net | 1,413 | 1,416 |  |
Liabilities |  |  |  |
Current liabilities | 27 | 27 |  |
Debt and capital lease obligations, less current portion | 989 | 905 |  |
Diamond Green Diesel Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 167 | 123 |  |
Other current assets | 50 | 66 |  |
Property, plant, and equipment, net | 529 | 435 |  |
Liabilities |  |  |  |
Current liabilities | 29 | 33 |  |
Debt and capital lease obligations, less current portion | 0 | 0 |  |
Central Mexico Terminals [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 2 | 1 |  |
Other current assets | 13 | 4 |  |
Property, plant, and equipment, net | 107 | 51 |  |
Liabilities |  |  |  |
Current liabilities | 63 | 26 |  |
Debt and capital lease obligations, less current portion | 0 | 0 |  |
Other Variable Interest Entities [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 14 | 13 |  |
Other current assets | 0 | 0 |  |
Property, plant, and equipment, net | 119 | 127 |  |
Liabilities |  |  |  |
Current liabilities | 6 | 9 |  |
Debt and capital lease obligations, less current portion | $ 38 | $ 43 |  |

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