Financial Instruments (Derivative Assets And Liabilities) (Details) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
Fair Value of Derivative Financial Instruments, Assets	$ 43,347	$ 65,184
Fair Value of Derivative Financial Instruments, Liabilities	44,607	20,160
Derivative Financial Instruments [Member]
Fair Value of Derivative Financial Instruments, Assets	43,247	65,184
Fair Value of Derivative Financial Instruments, Liabilities	$ 44,607	$ 20,160

Carrying amount as of the balance sheet date of the assets arising from derivative contracts and hedging activities, which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 4

Name:	us-gaap_DerivativeInstrumentsAndHedgesNoncurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant