Securitization Activities (Summary Of Retained Interests In SPEs) (Details) - USD ($) $ in Millions	Feb. 28, 2019	Nov. 30, 2018
Residential mortgage-backed securities
Securitization Activities [Line Items]
U.S. government agency residential mortgage-backed securities	$ 12,620.2	$ 13,633.5
Retained Interests	353.1	365.3
Commercial mortgage-backed securities
Securitization Activities [Line Items]
U.S. government agency commercial mortgage-backed securities	1,594.4	2,027.6
Retained Interests	70.7	185.6
CLOs
Securitization Activities [Line Items]
CLOs	3,522.8	3,512.0
Retained Interests	23.7	20.9
Consumer and other loans
Securitization Activities [Line Items]
Retained Interests	61.3	48.9
Consumer and Other Loans Securitization Assets	$ 938.0	$ 604.1