Derivative Instruments and Hedging Activities (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2011 Installment Year Contract	Sep. 30, 2010 Year Contract	Sep. 30, 2009
Derivative Instruments and Hedging Activities (Textuals) [Abstract]
Partially hedges forecasted export sales denominated in foreign currencies using forward and option contracts	one-year terms
Notional amount of commodity contracts	0	0
Notional amounts outstanding foreign exchange contracts	$ 2,209,780	$ 1,776,046
Reclassification of terminated interest rate swaps to interest expense within the next 12 months	996
Notional amounts outstanding interest rate swaps designated as fair value hedges,4.55% notes	200,000	200,000
Percentage of fixed-to-floating swap rate	4.55%
Face amounts of notes due	200,000
Outstanding interest rate swaps designated as cash flow hedges	900,000	0
Gain (loss) related to hedge ineffectiveness	$ 0	$ 0	$ 0

Derivative Instruments and Hedging Activities.

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- Definition

The fixed rate of interest stated in the contractual debt agreement that is subject to a fixed-to-floating rate swap agreement entered into to convert the fixed payments specified to floating interest payments.

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- Definition

The notional amount of commodity contracts outstanding as of period ends.

+ Details

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

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- Definition

The average time remaining until maturity on the group of derivatives identified.

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- Definition

The portion of a hedge deemed to be ineffective that is reflected in current period results of operations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)(1)

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-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(2)

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- Definition

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

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Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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-Paragraph 1B

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-Paragraph 1A

-Subparagraph (d)

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Aggregate notional amount of all interest rate derivatives designated as hedging instruments in fair value hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

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