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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Outstanding Commodity Contracts that Hedge Forecasted Purchases (Details)	12 Months Ended
	Sep. 30, 2025 T gal	Sep. 30, 2024 T gal
Urea
Derivative [Line Items]
Outstanding commodity contracts, mass | T	49,500	51,000
Diesel
Derivative [Line Items]
Outstanding commodity contracts, volume	2,478,000	1,092,000
Heating Oil
Derivative [Line Items]
Outstanding commodity contracts, volume	1,050,000	42,000

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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+ References

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Nominal volume used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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