Goodwill and Indefinite-Lived Intangible Assets (Narrative) (Details) $ in Millions	12 Months Ended
Sep. 30, 2017 USD ($) segment	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 466.9
Number of reportable business segments \| segment	3
Indefinite-lived intangible assets	$ 466.9	$ 466.9

No definition available.

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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

+ Details

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit.

+ References

+ Details

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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