Selected Quarterly Financial Data (Unaudited) - Footnote Figures (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Condensed Income Statements, Captions [Line Items]
Depreciation expense									$ 26.9	$ 26.4	$ 24.4
Inventory, LIFO Reserve, Effect on Income, Net	$ (0.4)	$ (1.2)	$ (0.6)	$ (0.8)	$ 0.6	$ 0.9	$ 1.5	$ 0.8
Manufacturing Facilities and Equipment [Member]
Condensed Income Statements, Captions [Line Items]
Depreciation expense	$ 5.4	$ 5.0	$ 5.4	$ 5.6	$ 5.4	$ 5.5	$ 5.0	$ 4.9	$ 21.4	$ 20.8	$ 19.2