Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
May 31, 2016 |
May 31, 2015 |
May 31, 2016 |
May 31, 2015 |
|
| Transfers and Servicing [Abstract] | ||||
| Transferred assets | $ 1,183.9 | $ 1,490.6 | $ 3,132.8 | $ 3,053.5 |
| Proceeds on new securitizations | 1,184.6 | 1,527.1 | 3,147.3 | 3,091.6 |
| Cash flows received on retained interests | $ 13.1 | $ 12.2 | $ 22.5 | $ 19.0 |