Inventory (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Work in process	$ 1,657	$ 1,518
Raw materials	1,160	1,109
Finished goods	56	69
Pre-owned aircraft	62	80
Total inventories	$ 2,935	$ 2,776