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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2013
Supplemental Cash Flow Information [Abstract] |
Changes in current assets and current liabilities | 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,
| 2013 |  | 2012
Decrease (increase) in current assets: |  |  |
Receivables, net | $ | (1,135 | ) |  | $ | 1,133 |
Inventories | (1,335 | ) |  | (116 | )
Income taxes receivable | (122 | ) |  | 172 |
Prepaid expenses and other | 8 |  |  | (25 | )
Increase (decrease) in current liabilities: |  |  |
Accounts payable | 2,031 |  |  | (150 | )
Accrued expenses | 51 |  |  | 10 |
Taxes other than income taxes | 276 |  |  | 55 |
Income taxes payable | (5 | ) |  | 112 |
Changes in current assets and current liabilities | $ | (231 | ) |  | $ | 1,191 |
Cash flows related to interest and income taxes | Cash flows related to interest and income taxes were as follows (in millions):
| Nine Months Ended September 30,
| 2013 |  | 2012
Interest paid in excess of amount capitalized | $ | 237 |  |  | $ | 206 |
Income taxes paid, net | 347 |  |  | 238 |

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