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Restructuring and Other Charges - Schedule of Change in Restructuring Reserves (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 10.2	$ 10.2
Utilized - noncash		(0.8)
Ending balance	9.4	9.4
Employee Severance and Termination Benefits
Restructuring Reserve [Roll Forward]
Restructuring charges		9.4
Ending balance	$ 9.4	9.4
Property, Plant and Equipment Impairment
Restructuring Reserve [Roll Forward]
Restructuring charges		0.8
Utilized - noncash		$ (0.8)

X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
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-SubTopic 10
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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

+ References

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-Publisher FASB
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