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Financial Assets And Liabilities (Narrative) (Details)	6 Months Ended
Financial Assets And Liabilities (Narrative) (Details)	Apr. 30, 2012
Financial Assets And Liabilities [Line Items]
Shipments period using hedges (in months)	one
Maximum period for hedge balance in OCI to be reclassified to statement of operations (in months)	twelve
Non-Designated Hedging Instrument [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	one
Foreign Exchange Contracts [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	21
Duration of foreign exchange forward contracts	one
Maximum [Member]
Financial Assets And Liabilities [Line Items]
Derivative maturity period (in months)	21
Derivative maturity period of rolled over currency contracts (in years)	3
Minimum [Member]
Financial Assets And Liabilities [Line Items]
Derivative maturity period (in months)	1

Description of the reasons for holding or issuing foreign currency exchange rate derivative instruments. Includes discussion of the objectives for holding the instruments, the context needed to understand those objectives, and the strategies for achieving those objectives. Disclosures may be more meaningful if such objectives and strategies are described in the context of an entity's overall risk management profile.

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