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Financial Derivatives (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Nov. 30, 2012 USD ($)	Nov. 30, 2011 USD ($)	Aug. 31, 2012 USD ($)	Nov. 30, 2012 Euro [Member] EUR (€)	Aug. 31, 2012 Euro [Member] EUR (€)	Nov. 30, 2011 Euro [Member] EUR (€)
Derivatives, Fair Value [Line Items]
Realized and unrealized gains, net of related income tax effects	$ 1.7	$ 1.1	$ 2.4
Fixed rate, per annum	6.05%
Foreign currency translation forward contracts resulting in an after-tax net (loss) gain	(0.7)	0.3
Accumulated currency translation adjustments in AOCI, after-tax gains	1.8	1.3	2.4
Outstanding foreign currency forward contracts to sell				€ 13.0	€ 26.5	€ 17.0

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- Definition

The effective portion of gain or loss included in accumulated other comprehensive income on derivative instruments designated and qualifying as hedging instruments.

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Aggregate notional amount of foreign currency derivatives to sell a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Net of tax amount of the income statement impact of the reclassification adjustment for translation gain (loss) realized upon the sale or complete or substantially complete liquidation of an investment in a foreign entity. Also includes reclassification adjustments on foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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