Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

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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)
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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.

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Financial Instruments and Risk Management - Derivative Instruments, Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ 0.0	$ 0.0	$ 0.0	$ (2.2)
Foreign currency contracts \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| VARTAAG
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income			2.2
Not Designated as Hedging Instrument \| Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Estimated Fair Value Liability	0.3		0.3		$ (0.2)
Gain (Loss) Recognized in Income	$ 0.3	$ (0.7)	$ (0.6)	$ (1.6)