Intercompany Guarantee and Subsidy Agreements (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011
Guarantor Obligations [Line Items]
Finance lease income(1)	$ (24)	$ (32)	$ (65)		$ (101)
Interest income on notes receivable	11	9	33		25
Operating lease income	64	78	199		259
Net gain on disposal of assets		3	2		18
Financial Guarantee [Member]
Guarantor Obligations [Line Items]
Finance lease income(1)			(2)	[1]	(2)	[1]
Interest income on notes receivable			1		1
Operating lease income			37		49
Net gain on disposal of assets					2
Income And Expense From Intercompany Guarantee And Subsidy Agreements, Total			$ 36		$ 50

[1] For the nine months ended September 30, 2012 and 2011, Finance lease income included $(2) and $(2) for fees paid to Boeing related to guarantee agreements.