Accounting Policies Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018	Nov. 30, 2018
Summary Of Significant Accounting Policies [Line Items]
Currency translation adjustments	$ 44.9	$ 50.7	$ 66.8	$ 77.1
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	146.5	126.3	421.5	665.0
Sales Allowances Current	$ 115.7	125.9	$ 115.7	125.9	$ 142.1
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				20.9
Adjustment
Summary Of Significant Accounting Policies [Line Items]
Currency translation adjustments		$ 3.1		$ 4.3