Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Customer Financing [Line Items]
Operating leases	$ 1,849		$ 1,991
717 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,841	[1]	1,906	[1]
Operating leases	470		480
757 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	581	[1]	631	[1]
Operating leases	467		451
MD-80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	454	[1],[2]	485	[1],[2]
Operating leases	0		0
737 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	340		394
Operating leases	213		242
MD-11 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	295	[1]	321	[1]
Operating leases	295		321
767 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	248		307
Operating leases	$ 96		$ 103

[1] Out-of-production aircraft

[2] Disclosure omitted from 2011 financial statements