Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 14.7	$ 22.6	$ 25.8
Charged to Costs and Expenses	17.7	4.2	10.6
Charged to Other Accounts	2.1	0.0	(3.3)
Deductions	(1.9)	(12.1)	(10.5)
Balance at End of Period	32.6	14.7	22.6
Allowance For Doubtful Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	4.2	8.0	4.0
Charged to Costs and Expenses	2.6	0.7	4.9
Charged to Other Accounts	0.3	0.0	(0.1)
Deductions	(0.5)	(4.5)	(0.8)
Balance at End of Period	6.6	4.2	8.0
Valuation Allowance On Net Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	10.5	14.6	21.8
Charged to Costs and Expenses	15.1	3.5	5.7
Charged to Other Accounts	1.8	0.0	(3.2)
Deductions	(1.4)	(7.6)	(9.7)
Balance at End of Period	$ 26.0	$ 10.5	$ 14.6