Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 2,319	$ 2,583
Property, plant, and equipment, net	30,653	29,264
Liabilities
Current liabilities, including current portion of debt and finance lease obligations	7,300	13,160
Debt and finance lease obligations, less current portion	12,090	9,178
Variable Interest Entity, Primary Beneficiary [Member]
Assets
Cash and cash equivalents	347	110
Other current assets	305	689
Property, plant, and equipment, net	1,492	1,192
Liabilities
Current liabilities, including current portion of debt and finance lease obligations	643	483
Debt and finance lease obligations, less current portion	27	31
Diamond Green Diesel Holdings LLC (DGD) [Member]
Assets
Cash and cash equivalents	331	85
Other current assets	234	567
Property, plant, and equipment, net	887	706
Liabilities
Current liabilities, including current portion of debt and finance lease obligations	80	66
Debt and finance lease obligations, less current portion	0	0
Central Mexico Terminals [Member]
Assets
Cash and cash equivalents	0	0
Other current assets	44	33
Property, plant, and equipment, net	506	381
Liabilities
Current liabilities, including current portion of debt and finance lease obligations	556	409
Debt and finance lease obligations, less current portion	0	0
Other VIEs [Member]
Assets
Cash and cash equivalents	16	25
Other current assets	27	89
Property, plant, and equipment, net	99	105
Liabilities
Current liabilities, including current portion of debt and finance lease obligations	7	8
Debt and finance lease obligations, less current portion	$ 27	$ 31