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Goodwill and Other Intangible Assets - Intangibles Narrative (Details) - Trademarks and Trade Names [Member] - Aerospace [Member] - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Indefinite-lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 38.7
Trade names, fair value exceeds carrying value, percentage	9.00%
Measurement Input, Long-term Revenue Growth Rate [Member]
Indefinite-lived Intangible Assets [Line Items]
Fair value inputs, valuation method, residual growth rate	3.00%	3.00%
Measurement Input, Discount Rate [Member]
Indefinite-lived Intangible Assets [Line Items]
Fair value inputs, valuation method, discount rate	9.50%	10.30%

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- Definition

Fair value inputs, valuation method, discount rate

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- Definition

Percentage of fair value of trade name in excess of carrying amount.

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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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.

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