Customer Financing (Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Customer Financing [Line Items]
Gross customer financing	$ 2,306	$ 2,887
Operating lease equipment	834	782
B-717 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	736	918
Operating lease equipment	124	204
B-747-8 [Member]
Customer Financing [Line Items]
Gross customer financing	475	477
Operating lease equipment	130	132
B-737 [Member]
Customer Financing [Line Items]
Gross customer financing	263	290
Operating lease equipment	240	263
B-777 [Member]
Customer Financing [Line Items]
Gross customer financing	240	68
Operating lease equipment	236	60
MD-80 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	186	204
B-757 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	182	200
Operating lease equipment	22	24
B-747-400 aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	90	116
Operating lease equipment	$ 31	$ 45