Customer Financing (Customer Financing Carrying Values Related To Major Aircraft Concentrations) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Operating leases	$ 1,884		$ 1,991
717 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	1,855	[1]	1,906	[1]
Operating leases	474		480
757 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	606	[1]	631	[1]
Operating leases	476		451
MD-80 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	460	[1],[2]	485	[1],[2]
Operating leases	0		0
737 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	361		394
Operating leases	224		242
MD-11 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	300	[1]	321	[1]
Operating leases	300		321
767 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer financing carrying value	265		307
Operating leases	$ 98		$ 103

[1] Out-of-production aircraft

[2] Disclosure omitted from 2011 financial statements