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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2013
Inventory Disclosure [Abstract] |
Schedule of Inventory Components |
|  | June 30, 2013 |  |  | December 31, 2012 |
Finished goods |  | $ | 580 |  |  | $ | 542 |
Work-in-process |  |  | 925 |  |  |  | 866 |
Bauxite and alumina |  |  | 649 |  |  |  | 618 |
Purchased raw materials |  |  | 502 |  |  |  | 536 |
Operating supplies |  |  | 249 |  |  |  | 263 |
|  | $ | 2,905 |  |  | $ | 2,825 |

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