Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Customer Financing [Line Items]
Customer financing carrying value	$ 2,183	$ 2,306
Operating leases	785	834
B-717
Customer Financing [Line Items]
Customer financing carrying value	689	736
Operating leases	113	124
B747-8
Customer Financing [Line Items]
Customer financing carrying value	483	475
Operating leases	124	130
B-737
Customer Financing [Line Items]
Customer financing carrying value	253	263
Operating leases	231	240
B-777
Customer Financing [Line Items]
Customer financing carrying value	232	240
Operating leases	230	236
MD 80 Aircraft
Customer Financing [Line Items]
Customer financing carrying value	171	186
B-757
Customer Financing [Line Items]
Customer financing carrying value	166	182
Operating leases	14	22
B747-400
Customer Financing [Line Items]
Customer financing carrying value	81	90
Operating leases	$ 28	$ 31