Customer Financing (Customer Financing Carrying Values Related To Major Aircraft Concentrations) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Operating leases	$ 2,016		$ 2,281
717 Aircraft [Member]
Customer financing carrying value	1,948	[1]	2,070	[1]
Operating leases	487		561
757 Aircraft [Member]
Customer financing carrying value	659	[1]	720	[1]
Operating leases	470		629
737 Aircraft [Member]
Customer financing carrying value	313		366
Operating leases	261		317
767 Aircraft [Member]
Customer financing carrying value	320		372
Operating leases	105		115
MD -11 Aircraft [Member]
Customer financing carrying value	289	[1]	327	[1]
Operating leases	$ 289		$ 327

[1] Out-of-production aircraft