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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on OCI and the Condensed, Consolidated Statements of Operations (Details) - Fair value, inputs, level 2 - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Derivatives not designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Statement of Operations	$ 0.3	$ (8.4)
Derivatives not designated as Hedging Instruments | Currency forward contracts | Other income / expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Statement of Operations	(4.2)	(5.3)
Derivatives not designated as Hedging Instruments | Commodity hedging instruments | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Statement of Operations	4.5	(3.1)
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in AOCI	19.8	(14.6)
Amount of Gain/(Loss) Reclassified From AOCI Into Statement of Operations	(5.4)	(7.5)
Cash Flow Hedging | Interest rate swap agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in AOCI	3.4	(13.3)
Cash Flow Hedging | Interest rate swap agreements | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Reclassified From AOCI Into Statement of Operations	(7.7)	(6.6)
Cash Flow Hedging | Commodity hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in AOCI	16.4	(1.3)
Cash Flow Hedging | Commodity hedging instruments | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Reclassified From AOCI Into Statement of Operations	$ 2.3	$ (0.9)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Amount, before tax and after reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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