Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Nov. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 0.2		$ 2.4
Cash equivalents	465.2		465.2		$ 481.1
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (57.3)	$ 31.8	$ (13.9)	$ 46.0