Customer Financing (Customer Financing Carrying Values Related To Major Aircraft Concentrations) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivables [Line Items]
Operating leases	$ 1,991		$ 2,281
717 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Customer financing carrying value	1,906	[1]	2,070	[1]
Operating leases	480		561
757 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Customer financing carrying value	631	[1]	720	[1]
Operating leases	451		629
737 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Customer financing carrying value	394		366
Operating leases	242		317
767 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Customer financing carrying value	307		372
Operating leases	103		115
MD-11 Aircraft [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Customer financing carrying value	321	[1]	327	[1]
Operating leases	$ 321		$ 327

[1] Out of production aircraft