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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 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):
| Six Months Ended June 30,
| 2018 |  | 2017
Decrease (increase) in current assets: |  |  |
Receivables, net | $ | (595 | ) |  | $ | 1,396 |
Inventories | (46 | ) |  | 123 |
Prepaid expenses and other | (35 | ) |  | 86 |
Increase (decrease) in current liabilities: |  |  |
Accounts payable | 661 |  |  | (942 | )
Accrued expenses | (83 | ) |  | 262 |
Taxes other than income taxes payable | 28 |  |  | (41 | )
Income taxes payable | (375 | ) |  | (25 | )
Changes in current assets and current liabilities | $ | (445 | ) |  | $ | 859 |
Cash flows related to interest and income taxes were as follows (in millions):
| Six Months Ended June 30,
| 2018 |  | 2017
Interest paid in excess of amount capitalized | $ | 248 |  |  | $ | 235 |
Income taxes paid, net | 817 |  |  | 263 |

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