Securitization Activities (Summary Of Retained Interests In SPEs) (Details) - USD ($) $ in Millions	May 31, 2019	Nov. 30, 2018
Residential mortgage-backed securities
Securitization Activities [Line Items]
U.S. government agency residential mortgage-backed securities	$ 12,886.5	$ 13,633.5
Retained Interests	121.5	365.3
Commercial mortgage-backed securities
Securitization Activities [Line Items]
U.S. government agency commercial mortgage-backed securities	1,374.9	2,027.6
Retained Interests	48.3	185.6
CLOs
Securitization Activities [Line Items]
CLOs	4,943.3	3,512.0
Retained Interests	56.9	20.9
Consumer and other loans
Securitization Activities [Line Items]
Consumer and other loans	657.1	604.1
Retained Interests	$ 44.8	$ 48.9