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Sales of Receivables and Servicing Rights - Servicing Rights and Residual Interests Economic Assumptions (Details) - Fixed-rate residential mortgage loans | 3 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Schedule of Servicing Assets at Amortized Value |  |
Weighted- Average Life (in years) | 8 years 3 months 18 days | 6 years
Prepayment Speed (annual) (as a percent) | 9.00% | 12.10%
OAS (bps) | 0.0549 | 0.0496

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