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Variable Interest Entities (Details) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and temporary cash investments | $ 5,207 | $ 4,816 | $ 4,925 | $ 4,114
Property, plant, and equipment, net | 27,054 | 26,472 |  |
Liabilities |  |  |  |
Current liabilities | 7,683 | 8,328 |  |
Debt and capital lease obligations, less current portion | 8,366 | 7,886 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Assets |  |  |  |
Cash and temporary cash investments | 255 | 253 |  |
Other current assets | 56 | 90 |  |
Property, plant, and equipment, net | 1,446 | 1,353 |  |
Liabilities |  |  |  |
Current liabilities | 37 | 39 |  |
Debt and capital lease obligations, less current portion | 570 | 571 |  |
Valero Energy Partners LP [Member] |  |  |  |
Assets |  |  |  |
Cash and temporary cash investments | 88 | 71 |  |
Other current assets | 1 | 3 |  |
Property, plant, and equipment, net | 945 | 865 |  |
Liabilities |  |  |  |
Current liabilities | 14 | 15 |  |
Debt and capital lease obligations, less current portion | 525 | 525 |  |
Diamond Green Diesel Holdings LLC [Member] |  |  |  |
Assets |  |  |  |
Cash and temporary cash investments | 155 | 167 |  |
Other current assets | 55 | 87 |  |
Property, plant, and equipment, net | 371 | 355 |  |
Liabilities |  |  |  |
Current liabilities | 17 | 17 |  |
Debt and capital lease obligations, less current portion | 0 | 0 |  |
Other Variable Interest Entities [Member] |  |  |  |
Assets |  |  |  |
Cash and temporary cash investments | 12 | 15 |  |
Other current assets | 0 | 0 |  |
Property, plant, and equipment, net | 130 | 133 |  |
Liabilities |  |  |  |
Current liabilities | 6 | 7 |  |
Debt and capital lease obligations, less current portion | $ 45 | $ 46 |  |

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