Arrangements with Off-Balance Sheet Risk - Narrative (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Contingent repurchase commitments | ||
| Guarantor Obligations [Line Items] | ||
| Guarantor obligations, current carrying value | ||
| Credit guarantees | ||
| Guarantor Obligations [Line Items] | ||
| Guarantor obligations, current carrying value | 29 | $ 14 |
| Credit guarantees | Lockheed Martin Corporation (Lockheed) | ||
| Guarantor Obligations [Line Items] | ||
| Guarantor obligations, current carrying value | $ 750 | |
| Minimum | Contingent repurchase commitments | ||
| Guarantor Obligations [Line Items] | ||
| Guarantor obligations, repurchase commitment, period post delivery | 10 years | |
| Maximum | Contingent repurchase commitments | ||
| Guarantor Obligations [Line Items] | ||
| Guarantor obligations, repurchase commitment, period post delivery | 15 years |