Concentrations - Portfolio Carrying Values by Product (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Types Of Aircraft [Line Items]
Carrying Value	$ 4,050		$ 4,315
717 [Member]
Types Of Aircraft [Line Items]
Carrying Value	1,930		2,001
757 [Member]
Types Of Aircraft [Line Items]
Carrying Value	538		631
737 [Member]
Types Of Aircraft [Line Items]
Carrying Value	353		408
MD-11 [Member]
Types Of Aircraft [Line Items]
Carrying Value	313		311
767 [Member]
Types Of Aircraft [Line Items]
Carrying Value	256		316
747 [Member]
Types Of Aircraft [Line Items]
Carrying Value	207		225
MD-80 [Member]
Types Of Aircraft [Line Items]
Carrying Value	164		171
777 [Member]
Types Of Aircraft [Line Items]
Carrying Value	145		134
Other [Member]
Types Of Aircraft [Line Items]
Carrying Value	$ 144	[1]	$ 118	[1]

[1] Other includes aircraft, equipment, notes and stock. Some of these aircraft are out of production, but are supported by the manufacturer or other third-party parts and service providers.