Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Customer Financing [Line Items]
Customer financing carrying value	$ 3,252	$ 3,586
Operating leases	1,383	1,710
B-717 [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,379	1,415
Operating leases	365	372
747 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	721	1,038
Operating leases	721	1,038
MD 80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 317	$ 314
Operating leases
B-757 [Member]
Customer Financing [Line Items]
Customer financing carrying value	$ 263	$ 270
Operating leases	46	48
B-767 [Member]
Customer Financing [Line Items]
Customer financing carrying value	183	185
Operating leases	90	84
B-737 [Member]
Customer Financing [Line Items]
Customer financing carrying value	112	115
Operating leases	112	115
MD-11 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	28	35
Operating leases	$ 28	$ 35