Financing Receivables and Operating Lease Equipment - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
B-717
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	$ 192	$ 196
B-777
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	179	183
B747-8
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	86	92
B-737
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	$ 47	$ 47