|
Derivative Instruments and Fair Value Measurement of Assets and Liabilities Fair Value of Derivative Instruments Outstanding (Details)
In Thousands, unless otherwise specified |
Apr. 30, 2013
Sell EUR, buy GBP [Member]
USD ($)
|
Apr. 30, 2013
Sell EUR, buy GBP [Member]
EUR (€)
|
Oct. 31, 2012
Sell EUR, buy GBP [Member]
USD ($)
|
Oct. 31, 2012
Sell EUR, buy GBP [Member]
EUR (€)
|
Apr. 30, 2013
Sell EUR, buy USD [Member]
USD ($)
|
Oct. 31, 2012
Sell EUR, buy USD [Member]
USD ($)
|
Apr. 30, 2013
Sell CAD, buy USD [Member]
USD ($)
|
Oct. 31, 2012
Sell CAD, buy USD [Member]
USD ($)
|
Apr. 30, 2013
Buy GBP, sell USD [Member]
USD ($)
|
Oct. 31, 2012
Buy GBP, sell USD [Member]
USD ($)
|
Apr. 30, 2013
Buy EUR, sell GBP [Member]
USD ($)
|
Apr. 30, 2013
Forward Purchase Aluminum Contracts [Member]
Commodity Contract [Member]
USD ($)
|
Oct. 31, 2012
Forward Purchase Aluminum Contracts [Member]
Commodity Contract [Member]
USD ($)
|
Apr. 30, 2013
Aluminum Swap Contracts [Member]
Commodity Contract [Member]
USD ($)
|
Oct. 31, 2012
Aluminum Swap Contracts [Member]
Commodity Contract [Member]
USD ($)
|
Apr. 30, 2013
Not Designated as Hedging Instrument [Member]
Forward Purchase Aluminum Contracts [Member]
Commodity Contract [Member]
lb
|
Oct. 31, 2012
Not Designated as Hedging Instrument [Member]
Forward Purchase Aluminum Contracts [Member]
Commodity Contract [Member]
lb
|
Apr. 30, 2013
Not Designated as Hedging Instrument [Member]
Aluminum Swap Contracts [Member]
Commodity Contract [Member]
lb
|
Oct. 31, 2012
Not Designated as Hedging Instrument [Member]
Aluminum Swap Contracts [Member]
Commodity Contract [Member]
lb
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Derivatives, Fair Value [Line Items] | |||||||||||||||||||
| Aluminum forward purchase and swap contracts | 1,102,000 | 2,370,000 | 1,874,000 | 0 | |||||||||||||||
| Price Risk Derivative Insruments Not Designated as Hedging Instruments, at Fair Value, Net | $ (65) | $ (164) | |||||||||||||||||
| Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value | (273) | 0 | |||||||||||||||||
| Foreign currency exchange derivatives, notional amount (stated in foreign currency) | 0 | 545 | 8,092 | 7,663 | 486 | 608 | 3,035 | 1,934 | 355 | ||||||||||
| Foreign currency exchange derivatives, fair value (stated in USD) | $ 0 | $ 0 | $ (118) | $ (23) | $ (6) | $ 1 | $ 26 | $ 5 | $ 3 |