Financing Receivables and Operating Lease Equipment - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| 777 Aircraft | ||
| Financing Receivables and Operating Lease Equipment [Line Items] | ||
| Gross customer financing | $ 161 | $ 170 |
| 737 Aircraft | ||
| Financing Receivables and Operating Lease Equipment [Line Items] | ||
| Gross customer financing | $ 143 | $ 45 |