Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 22.6	$ 25.8	$ 25.3
Charged to Costs and Expenses	4.2	10.6	4.1
Charged to Other Accounts	0.0	(3.3)	(2.3)
Deductions	(12.1)	(10.5)	(1.3)
Balance at End of Period	14.7	22.6	25.8
Allowance For Doubtful Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	8.0	4.0	4.1
Charged to Costs and Expenses	0.7	4.9	1.1
Charged to Other Accounts	0.0	(0.1)	(0.9)
Deductions	(4.5)	(0.8)	(0.3)
Balance at End of Period	4.2	8.0	4.0
Valuation Allowance On Net Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	14.6	21.8	21.2
Charged to Costs and Expenses	3.5	5.7	3.0
Charged to Other Accounts	0.0	(3.2)	(1.4)
Deductions	(7.6)	(9.7)	(1.0)
Balance at End of Period	$ 10.5	$ 14.6	$ 21.8