Securitization Activities - Summary of Retained Interests in SPEs (Details) - USD ($) $ in Millions	Feb. 28, 2022	Nov. 30, 2021
U.S. government agency residential mortgage-backed securities
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
U.S. government agency residential mortgage-backed securities	$ 278.4	$ 330.2
Retained Interests	4.9	4.9
U.S. government agency commercial mortgage-backed securities
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
U.S. government agency commercial mortgage-backed securities	1,842.3	2,201.8
Retained Interests	54.0	69.2
CLOs
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
CLOs	3,984.1	3,382.3
Retained Interests	31.7	31.0
Consumer and other loans
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Consumer and other loans	2,541.2	2,271.4
Retained Interests	$ 141.7	$ 136.4