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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
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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)

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- 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 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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 -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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- Definition 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 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 + Details
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