Derivative Financial Instruments and Hedging Activities (Details 3) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Pre-tax gains (losses) on derivative instruments
Total pre-tax effects of derivative instruments	$ (3.6)	$ 3.4	$ (8.0)
Designated as hedging instrument \| Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member] \| Net sales
Pre-tax gains (losses) on derivative instruments
Reclassified from other comprehensive income (effective portion):	0.0	(0.1)	0.0
Designated as hedging instrument \| Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member] \| Other Nonoperating Income (Expense) [Member]
Pre-tax gains (losses) on derivative instruments
Reclassified from other comprehensive income (effective portion):	0.0	(0.1)	(0.2)
Designated as hedging instrument \| Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member] \| Cost of Sales [Member]
Pre-tax gains (losses) on derivative instruments
Reclassified from other comprehensive income (effective portion):	(0.5)	(0.1)	0.0
Not designated as hedging instruments \| Foreign Exchange Contract [Member] \| Other Nonoperating Income (Expense) [Member]
Pre-tax gains (losses) on derivative instruments
Not designated as hedges	(2.4)	3.5	(7.6)
Not designated as hedging instruments \| Interest Rate Contract [Member] \| Other Nonoperating Income (Expense) [Member]
Pre-tax gains (losses) on derivative instruments
Not designated as hedges	$ (0.7)	$ 0.2	$ (0.2)

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

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=109980867&loc=SL5618551-113959

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No definition available.

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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
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959

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-Publisher FASB
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-Topic 815
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959

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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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