Financial Instruments and Commodity Contracts - Foreign Currency Contracts (Details) (Foreign Exchange Contract [Member]) In Millions, unless otherwise specified	Apr. 30, 2013 EUR (€)	Oct. 31, 2012 EUR (€)	Apr. 30, 2013 Contract 1 [Member] USD ($)	Apr. 30, 2013 Contract 1 [Member] CAD	Apr. 30, 2013 Contract 2 [Member] CAD
Derivative [Line Items]
Derivative, Notional Amount	€ 8	€ 25	$ 25	50	50

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

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

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant