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Inventories | 12 Months Ended
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Dec. 31, 2013
Inventory Disclosure [Abstract] |
Inventories | G. Inventories
December 31, |  | 2013 |  |  | 2012 |
Finished goods |  | $ | 578 |  |  | $ | 542 |
Work-in-process |  |  | 828 |  |  |  | 866 |
Bauxite and alumina |  |  | 581 |  |  |  | 618 |
Purchased raw materials |  |  | 474 |  |  |  | 536 |
Operating supplies |  |  | 244 |  |  |  | 263 |
|  | $ | 2,705 |  |  | $ | 2,825 |
At December 31, 2013 and 2012, the total amount of inventories valued on a LIFO basis was 34% and 35%, respectively. If valued on an average-cost basis, total inventories would have been $691 and $770 higher at December 31, 2013 and 2012, respectively. During the three-year period ended December 31, 2013, reductions in LIFO inventory quantities caused partial liquidations of the lower cost LIFO inventory base. These liquidations resulted in the recognition of income of $26 ($17 after-tax) in 2013, $1 ($1 after-tax) in 2012, and $2 ($1 after-tax) in 2011.

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- Definition The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5 + Details
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