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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Schedule of inventory by costing method [Table Text Block] | The following table sets forth the Company’s inventories as of December 31, 2016 and 2015.
| December 31, 2016 |  | December 31, 2015
| (In millions)
LIFO inventories |  |  |
FIFO value | $ | 1,390 |  |  | $ | 1,077 |
LIFO valuation reserve | (75 | ) |  | (56 | )
LIFO inventories carrying value | 1,315 |  |  | 1,021 |
FIFO inventories | 2,705 |  |  | 2,756 |
Market inventories | 4,424 |  |  | 4,066 |
Supplies and other inventories | 387 |  |  | 400 |
Total inventories | $ | 8,831 |  |  | $ | 8,243 |

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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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- References No definition available. + Details
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