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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2019 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Decrease (increase) in current assets: |  |  |  |  |  |  |  |  |
Receivables, net |  |  |  | $ (4,382) |  | $ 2,773 | $ (1,041) |  |
Inventories |  |  |  | (253) |  | 1,007 | (385) |  |
Prepaid expenses and other |  |  |  | (22) |  | 101 | 0 |  |
Increase (decrease) in current liabilities: |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  | 6,301 |  | (4,068) | 1,534 |  |
Accrued expenses |  |  |  | 253 |  | 48 | (27) |  |
Taxes other than income taxes payable |  |  |  | 104 |  | 37 | 60 |  |
Income taxes payable |  |  |  | 224 |  | (243) | 153 |  |
Changes in current assets and current liabilities |  |  |  | 2,225 |  | (345) | 294 |  |
Cash Flows Related to Interest and Income Taxes |  |  |  |  |  |  |  |  |
Interest paid in excess of amount capitalized, including interest on finance leases |  |  |  | 598 |  | 526 | 452 |  |
Income taxes paid (refunded), net (see Note 16) |  |  |  | (842) |  | 203 | (116) |  |
Operating cash flows |  |  |  |  |  |  |  |  |
Operating Leases |  |  |  | 397 |  | 444 | 441 |  |
Finance Leases |  |  |  | 72 |  | 97 | 50 |  |
Investing cash flows |  |  |  |  |  |  |  |  |
Operating Leases |  |  |  | 1 |  | 1 | 1 |  |
Financing cash flows |  |  |  |  |  |  |  |  |
Finance Leases |  |  |  | 135 |  | 80 | 40 |  |
Changes in lease balances resulting from new and modified leases, Operating Leases | [1] |  |  | 451 |  | 263 | 1,756 |  |
Changes in lease balances resulting from new and modified leases, Finance Leases | [1] |  |  | 378 |  | 950 | 239 |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
Decrease in receivables as a result of decreases in sales volumes and commodity prices |  |  |  |  |  | 3,300 |  |  |
Increase in income taxes receivable |  |  |  |  |  | 1,000 |  |  |
Construction in Progress [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
MVP Terminal construction costs |  |  |  | 1,862 |  | 2,399 |  |  |
Topic 842 [Member] |  |  |  |  |  |  |  |  |
Financing cash flows |  |  |  |  |  |  |  |  |
Changes in lease balances resulting from new and modified leases, Operating Leases |  | $ 1,300 |  |  |  |  |  |  |
MVP Terminal [Member] |  |  |  |  |  |  |  |  |
Financing cash flows |  |  |  |  |  |  |  |  |
Changes in lease balances resulting from new and modified leases, Finance Leases |  |  | $ 1,400 |  |  | 800 |  |  |
MVP Terminal [Member] | Magellan Midstream Partners LP (Magellan) [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
Long-term liability recorded |  |  |  |  |  |  |  |  | $ 292
MVP Terminal [Member] | Construction in Progress [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
MVP Terminal construction costs |  |  |  |  |  |  |  |  | $ 539
MVP Terminal [Member] | Topic 842 [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
Derecognized assets related to MVP |  | 539 |  |  |  |  |  |  |
Derecognized liability related to MVP |  | 292 |  |  |  |  |  |  |
Equity investment in MVP recorded due to derecognition of assets and liabilities |  | $ 247 |  |  |  |  |  |  |
U.S. [Member] |  |  |  |  |  |  |  |  |
Cash Flows Related to Interest and Income Taxes |  |  |  |  |  |  |  |  |
Income taxes paid (refunded), net (see Note 16) |  |  |  | (878) | [2] | 130 | (298) | [3] |
Internal Revenue Service (IRS) [Member] | U.S. [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
Refund received, including interest, associated with income tax settlement |  |  |  | $ 962 |  |  | 348 |  |
Blender's Tax Credit Receivable [Member] |  |  |  |  |  |  |  |  |
Supplemental Cash Flow Information (Textual) |  |  |  |  |  |  |  |  |
Receivable of (collection of) blender's tax credit receivable |  |  |  |  |  | $ (449) | $ 449 |  |
[1] | Noncash activity for the year ended December 31, 2020 primarily included approximately $800 million for a finance lease ROU asset and related liability recognized in connection with the terminaling agreement with MVP described in Note 6. Noncash activity for the year ended December 31, 2019 included $1.3 billion for operating lease ROU assets and related liabilities recorded on January 1, 2019 upon adoption of FASB Accounting Standards Codification Topic 842, “Leases,” (Topic 842).
[2] | This amount includes a refund of $962 million that we received related to our U.S. federal income tax return for 2020.
[3] | This amount includes a refund of $348 million, including interest, that we received related to the settlement of the combined audit of our U.S. federal income tax returns for 2010 and 2011. See “Tax Returns Under Audit–U.S. Federal” on page 121.

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