Income Taxes (Activity Related To Our Gross Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 33.2	$ 20.7	$ 31.2
Additions for current year tax positions	10.6	10.3	5.1
Additions for prior year tax positions	3.9	6.5	3.4
Reductions for prior year tax positions	0	(3.1)	(2.6)
Settlements	0	0	(0.6)
Statute expirations	(1.2)	(1.2)	(15.8)
Foreign currency translation	0.2	0	0
Balance at end of year	$ 46.7	$ 33.2	$ 20.7