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Inventory (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Work in process	$ 1,828	$ 1,633
Raw materials	1,290	1,210
Finished goods	28	29
Pre-owned aircraft	75gd_InventoryPreOwnedAircraft	18gd_InventoryPreOwnedAircraft
Total inventories	$ 3,221us-gaap_InventoryNet	$ 2,890us-gaap_InventoryNet

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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