Valuation And Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 31.1	$ 25.8	$ 25.0
Charged to Costs and Expenses	3.0	6.3	4.7
Charged to Other Accounts	0.8	2.6	(2.0)
Deductions	(3.4)	(3.6)	(1.9)
Balance at End of Period	31.5	31.1	25.8
Allowance For Doubtful Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	4.5	2.9	4.5
Charged to Costs and Expenses	0.7	1.1	0
Charged to Other Accounts	0	1.7	(0.2)
Deductions	(1.2)	(1.2)	(1.4)
Balance at End of Period	4.0	4.5	2.9
Valuation Allowance On Net Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	26.6	22.9	20.5
Charged to Costs and Expenses	2.3	5.2	4.7
Charged to Other Accounts	0.8	0.9	(1.8)
Deductions	(2.2)	(2.4)	(0.5)
Balance at End of Period	$ 27.5	$ 26.6	$ 22.9