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Inventories, Net - Inventories, Net of Reserve (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Inventory Net [Line Items]
Raw materials	$ 78	$ 105
Work-in-process	941	1,002
Finished products	334	424
Total	$ 1,353	$ 1,531

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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