Financing Receivables and Operating Lease Equipment - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
B-777 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	$ 170	$ 183
B-737 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	45	47
B-747-8 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing		92
B-717 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing		$ 196