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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2012
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):
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
Decrease (increase) in current assets: |  |  |  |  |
Receivables, net | $ | 437 |  |  | $ | (3,110 | ) |  | $ | (679 | )
Inventories | (282 | ) |  | 643 |  |  | (407 | )
Income taxes receivable | 51 |  |  | 128 |  |  | 545 |
Prepaid expenses and other | (28 | ) |  | (2 | ) |  | 107 |
Increase (decrease) in current liabilities: |  |  |  |  |
Accounts payable | (113 | ) |  | 2,004 |  |  | 670 |
Accrued expenses | 13 |  |  | (18 | ) |  | (99 | )
Taxes other than income taxes | (260 | ) |  | 312 |  |  | (66 | )
Income taxes payable | (120 | ) |  | 124 |  |  | (3 | )
Changes in current assets and current liabilities | $ | (302 | ) |  | $ | 81 |  |  | $ | 68 |
Cash flows related to interest and income taxes | Cash flows related to interest and income taxes were as follows (in millions):
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
Interest paid in excess of amount capitalized | $ | 302 |  |  | $ | 397 |  |  | $ | 457 |
Income taxes paid (received), net | 705 |  |  | 486 |  |  | (690 | )
Cash flows related to discontinued operations | Cash flows related to the discontinued operations of the Paulsboro and Delaware City Refineries have been combined with the cash flows from continuing operations within each category in the statements of cash flows for the year ended December 31, 2010 and are summarized as follows (in millions):
| Year Ended December 31, 2010
Cash provided by (used in) operating activities: |
Paulsboro Refinery | $ | 88 |
Delaware City Refinery | (26 | )
Cash used in investing activities: |
Paulsboro Refinery | (41 | )
Delaware City Refinery | — |

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