Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Customer Financing [Line Items]
Customer financing carrying value	$ 3,476	$ 3,582
Operating leases	1,470	1,677
B-717 [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,473	1,562
Operating leases	405	421
747 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	734	601
Operating leases	734	601
MD 80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 327	$ 358
Operating leases
B-757 [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 285	$ 370
Operating leases	57	349
B-767 [Member]
Customer Financing [Line Items]
Customer financing carrying value	182	158
Operating leases	78	47
B-737 [Member]
Customer Financing [Line Items]
Customer financing carrying value	118	156
Operating leases	118	127
MD-11 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	60	114
Operating leases	$ 60	$ 114