FAIR VALUE, HIERARCHY (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Sep. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	$ 50,349		$ 106,853
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	11,009	[1]	10,348	[1]
Other Assets, Fair Value Disclosure	30	[2]	2,204	[2]
Assets Fair Value Disclosure Total	61,388		119,405
Other Liabilities Fair Value Disclosure	0		0
Liabilities Fair Value Disclosure	45,573		75,039
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	11,009	[1]	10,348	[1]
Other Assets, Fair Value Disclosure	30	[2]	2,204	[2]
Assets Fair Value Disclosure Total	25,309		38,169
Other Liabilities Fair Value Disclosure	0		0
Liabilities Fair Value Disclosure	16,922		23,715
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
Other Assets, Fair Value Disclosure	0	[2]	0	[2]
Assets Fair Value Disclosure Total	36,079		81,236
Other Liabilities Fair Value Disclosure	0		0
Liabilities Fair Value Disclosure	28,651		51,324
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
Other Assets, Fair Value Disclosure	0	[2]	0	[2]
Assets Fair Value Disclosure Total	0		0
Other Liabilities Fair Value Disclosure	0		0
Liabilities Fair Value Disclosure	0		0
Physical Forward Commodity Contracts [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	20,248		37,690
Derivative Liabilities, Fair Value Disclosure	9,746		11,351
Physical Forward Commodity Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	0		0
Derivative Liabilities, Fair Value Disclosure	0		0
Physical Forward Commodity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	20,248		37,690
Derivative Liabilities, Fair Value Disclosure	9,746		11,351
Physical Forward Commodity Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	0		0
Derivative Liabilities, Fair Value Disclosure	0		0
Financial Commodity Contracts [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	29,915		68,883
Derivative Liabilities, Fair Value Disclosure	35,715		63,674
Financial Commodity Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	14,270		25,617
Derivative Liabilities, Fair Value Disclosure	16,922		23,715
Financial Commodity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	15,645		43,266
Derivative Liabilities, Fair Value Disclosure	18,793		39,959
Financial Commodity Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	0		0
Derivative Liabilities, Fair Value Disclosure	0		0
Financial commodity contracts - foreign exchange [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	186		280
Derivative Liabilities, Fair Value Disclosure	112		14
Financial commodity contracts - foreign exchange [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	0		0
Derivative Liabilities, Fair Value Disclosure	0
Financial commodity contracts - foreign exchange [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	186		280
Derivative Liabilities, Fair Value Disclosure	112		14
Financial commodity contracts - foreign exchange [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value Disclosure	0		0
Derivative Liabilities, Fair Value Disclosure	$ 0		$ 0

[1] Included in other noncurrent assets on the Consolidated Balance Sheets.

[2] Includes various money market funds.