Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Customer Financing [Line Items]
Customer financing carrying value	$ 2,270	$ 2,306
Operating leases	816	834
B-717 [Member]
Customer Financing [Line Items]
Customer financing carrying value	708	736
Operating leases	118	124
B747-8 [Member]
Customer Financing [Line Items]
Customer financing carrying value	489	475
Operating leases	130	130
B-737 [Member]
Customer Financing [Line Items]
Customer financing carrying value	258	263
Operating leases	236	240
B-757 [Member]
Customer Financing [Line Items]
Customer financing carrying value	177	182
Operating leases	21	22
MD 80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	188	186
B-777 [Member]
Customer Financing [Line Items]
Customer financing carrying value	235	240
Operating leases	233	236
B747-400 aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	84	90
Operating leases	$ 29	$ 31