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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Supplemental Cash Flow Information [Abstract] |
Schedule of cash flows, supplemental disclosures | In order to determine net cash provided by operating activities, net income (loss) is adjusted by, among other things, changes in current assets and current liabilities as follows (in millions):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Decrease (increase) in current assets: |  |  |  |  |
Receivables, net | $ | (4,382) |  |  | $ | 2,773 |  |  | $ | (1,041) |
Inventories | (253) |  |  | 1,007 |  |  | (385) |
Prepaid expenses and other | (22) |  |  | 101 |  |  | — |
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 were as follows (in millions):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
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) |
Supplemental cash flow information related to our operating and finance leases was as follows (in millions):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
| Operating Leases |  | Finance Leases |  | Operating Leases |  | Finance Leases |  | Operating Leases |  | Finance Leases
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |  |  |  |  |
Operating cash flows | $ | 397 |  |  | $ | 72 |  |  | $ | 444 |  |  | $ | 97 |  |  | $ | 441 |  |  | $ | 50 |
Investing cash flows | 1 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |  |  | — |
Financing cash flows | — |  |  | 135 |  |  | — |  |  | 80 |  |  | — |  |  | 40 |
Changes in lease balances resulting from new and modified leases (a) | 451 |  |  | 378 |  |  | 263 |  |  | 950 |  |  | 1,756 |  |  | 239 |
________________________ (a)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).

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