Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2019	Sep. 30, 2018
Intangible assets and goodwill, gross	$ 41.7	$ 32.7
Less: accumulated amortization	(31.8)	(27.0)
Intangible assets and goodwill, net	9.9	5.7
Customer Relationships [Member]
Intangible assets and goodwill, gross	20.1	15.1
Trademarks [Member]
Intangible assets and goodwill, gross	$ 21.6	$ 17.6

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Paragraph 2
-Subparagraph (a)(1)
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Name Accounting Standards Codification
-Topic 350
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-Section 50
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