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Financial Derivatives (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended						3 Months Ended
	Nov. 30, 2013 USD ($)	Nov. 30, 2012 USD ($)	Aug. 31, 2013 USD ($)	Nov. 30, 2013 Euro [Member] EUR (€)	Aug. 31, 2013 Euro [Member] EUR (€)	Nov. 30, 2012 Euro [Member] EUR (€)	Nov. 30, 2013 Rand [Member] ZAR	Aug. 31, 2013 Rand [Member] ZAR	Nov. 30, 2013 Foreign Currency Forward Contracts [Member] USD ($)	Nov. 30, 2012 Foreign Currency Forward Contracts [Member] USD ($)
Derivatives, Fair Value [Line Items]
Realized and unrealized gains, net of related income tax effects	$ 1.4	$ 1.7	$ 2.0
Derivative contracts resulting in an after-tax net loss									0.6	0.7
Accumulated currency translation adjustments in AOCI, after-tax gains	1.4	1.8	2.0
Outstanding foreign currency forward contracts to sell				€ 29.1	€ 29.2	€ 13.0	43.0	43.0

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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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.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 14A

-URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580



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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32022-110900



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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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