Income Taxes (Details Textuals) (USD $) In Millions	Aug. 31, 2011	Nov. 30, 2010
Income Taxes (Textuals) [Abstract]
Gross unrecognized tax benefits	$ 70.8	$ 52.9
Unrecognized tax benefits that would impact effective tax rate in future	47.3	34.3
Accrued interest on unrecognized tax benefits	10.2	6.4
Penalties were required to be accrued	$ 0	$ 0

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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