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Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Inventories [Abstract] |
Schedule of inventory by costing method |
| December 31, 2013 |  | December 31, 2012
| (In millions)
LIFO inventories |  |  |
FIFO value | $ | 1,408 |  |  | $ | 1,356 |
LIFO valuation reserve | (297 | ) |  | (522 | )
LIFO inventories carrying value | 1,111 |  |  | 834 |
FIFO inventories | 3,741 |  |  | 5,232 |
Market inventories | 6,059 |  |  | 7,036 |
Supplies and other inventories | 530 |  |  | 734 |
Total inventories | $ | 11,441 |  |  | $ | 13,836 |

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- Definition Tabular disclosure of the valuation of inventories using the lower of cost, determined by either LIFO or FIFO method, or market. + References No definition available. + Details
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