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Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Mar. 31, 2018
Supplemental Cash Flow Information [Abstract] |
Schedule of cash flows, supplemental disclosures | In order to determine net cash provided by operating activities, net income is adjusted by, among other things, changes in current assets and current liabilities as follows (in millions):
| Three Months Ended March 31,
| 2018 |  | 2017
Decrease (increase) in current assets: |  |  |
Receivables, net | $ | 145 |  |  | $ | 817 |
Inventories | (126 | ) |  | (291 | )
Prepaid expenses and other | (79 | ) |  | 53 |
Increase (decrease) in current liabilities: |  |  |
Accounts payable | (322 | ) |  | (306 | )
Accrued expenses | (131 | ) |  | 20 |
Taxes other than income taxes payable | (111 | ) |  | (123 | )
Income taxes payable | (402 | ) |  | (19 | )
Changes in current assets and current liabilities | $ | (1,026 | ) |  | $ | 151 |
Cash flows related to interest and income taxes were as follows (in millions):
| Three Months Ended March 31,
| 2018 |  | 2017
Interest paid in excess of amount capitalized | $ | 127 |  |  | $ | 128 |
Income taxes paid, net | 552 |  |  | 96 |

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