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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2016
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):
| Nine Months Ended September 30,
| 2016 |  | 2015
Decrease (increase) in current assets: |  |  |
Receivables, net | $ | (278 | ) |  | $ | 1,093 |
Inventories | 557 |  |  | (45 | )
Income taxes receivable | 165 |  |  | 88 |
Prepaid expenses and other | (28 | ) |  | (11 | )
Increase (decrease) in current liabilities: |  |  |
Accounts payable | 494 |  |  | (1,007 | )
Accrued expenses | 46 |  |  | (5 | )
Taxes other than income taxes | 8 |  |  | (50 | )
Income taxes payable | (11 | ) |  | (17 | )
Changes in current assets and current liabilities | $ | 953 |  |  | $ | 46 |
Cash flows related to interest and income taxes were as follows (in millions):
| Nine Months Ended September 30,
| 2016 |  | 2015
Interest paid in excess of amount capitalized | $ | 312 |  |  | $ | 301 |
Income taxes paid, net | 305 |  |  | 1,532 |

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