Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Customer Financing [Line Items]
Customer financing carrying value	$ 3,400	$ 3,582
Operating leases	1,587	1,677
B-717 [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,502	1,562
Operating leases	410	421
747 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	569	601
Operating leases	569	601
B-757 [Member]
Customer Financing [Line Items]
Customer financing carrying value	339	370
Operating leases	335	349
MD 80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 324	$ 358
Operating leases
B-767 [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 179	$ 158
Operating leases	73	47
B-737 [Member]
Customer Financing [Line Items]
Customer financing carrying value	120	156
Operating leases	120	127
MD-11 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	62	114
Operating leases	$ 62	$ 114