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Inventory (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Inventory write-down	$ 58
Work in process	1,518	1,202
Raw materials	1,109	1,031
Finished goods	69	77
Pre-owned aircraft	80	0
Total inventories	$ 2,776	$ 2,310

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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- Definition

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

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