Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022	Nov. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash equivalents	$ 460.9		$ 460.9		$ 15.8
Other comprehensive income (loss)	$ 149.9	$ 255.3	$ 439.9	$ 600.3