Derivative Instruments and Hedging Activities (Details 1) (Cash Flow Hedging [Member], USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Derivatives Accounted for as Designated Cash Flow Hedging Relationships
Gain (Loss) Recognized in OCI on Derivatives	$ (33,200)	$ 44,884	$ (82,073)
Location of Gain (Loss) Reclassified from Accumulated OCI into Income
Gain (Loss) Reclassified from Accumulated OCI into Income	(1,656)	(33,502)	102,781
Forward Exchange Contract [Member]
Derivatives Accounted for as Designated Cash Flow Hedging Relationships
Gain (Loss) Recognized in OCI on Derivatives	0	43,624	(81,410)
Interest rate swap [Member]
Derivatives Accounted for as Designated Cash Flow Hedging Relationships
Gain (Loss) Recognized in OCI on Derivatives	(33,200)	1,238	(641)
Commodity Forward Contract [Member]
Derivatives Accounted for as Designated Cash Flow Hedging Relationships
Gain (Loss) Recognized in OCI on Derivatives	0	22	(22)
Revenues [Member]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income
Gain (Loss) Reclassified from Accumulated OCI into Income	0	(31,471)	104,858
Interest Expense [Member]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income
Gain (Loss) Reclassified from Accumulated OCI into Income	(1,656)	(1,996)	(1,846)
Cost of Sales [Member]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income
Gain (Loss) Reclassified from Accumulated OCI into Income	$ 0	$ (35)	$ (231)