XML 58 R12.htm IDEA: XBRL DOCUMENT

Inventories

3 Months Ended

Mar. 31, 2013

D. Inventories


	March 31, 2013		December 31, 2012
Finished goods	$	589	$	542
Work-in-process		946		866
Bauxite and alumina		640		618
Purchased raw materials		542		536
Operating supplies		265		263

	$	2,982	$	2,825

At March 31, 2013 and December 31, 2012, the total amount of inventories valued on a last in, first out (LIFO) basis was 36% and 35%, respectively. If valued on an average-cost basis, total inventories would have been $773 and $770 higher at March 31, 2013 and December 31, 2012, respectively.

- 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+ Details