Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
Aug. 31, 2026 |
Aug. 31, 2025 |
|
| Transfers and Servicing [Abstract] | ||||
| Transferred assets | $ 1,816.5 | $ 1,451.8 | $ 5,235.7 | $ 4,085.3 |
| Proceeds on new securitizations | 1,816.5 | 1,451.8 | 5,235.7 | 4,085.3 |
| Cash flows received on retained interests | $ 10.8 | $ 6.7 | $ 35.8 | $ 18.1 |