Customer Financing - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Customer Financing [Line Items]
Operating lease equipment	$ 359	$ 470
B-717
Customer Financing [Line Items]
Gross customer financing	485	563
Operating lease equipment	0	45
B747-8
Customer Financing [Line Items]
Gross customer financing	131	394
B-737
Customer Financing [Line Items]
Gross customer financing	168	186
Operating lease equipment	149	174
B-777
Customer Financing [Line Items]
Gross customer financing	197	209
MD 80 Aircraft
Customer Financing [Line Items]
Gross customer financing		96
B-757
Customer Financing [Line Items]
Gross customer financing	63	107
B747-400
Customer Financing [Line Items]
Gross customer financing	$ 44	$ 46