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Goodwill and Other Intangible Assets - Intangibles Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Energy [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | $ 1.6
Trademarks and Trade Names [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Long-term Revenue Growth Rate |  |  | 3.00%
Trademarks and Trade Names [Member] | Aerospace [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  | $ 38.7 |
Fair Value Inputs, Discount Rate | 9.50% | 10.30% |
Fair Value Inputs, Long-term Revenue Growth Rate | 3.00% | 3.00% |
Trade names, fair value exceeds carrying value, percentage | 9.00% |  |
Trademarks and Trade Names [Member] | Minimum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Discount Rate |  |  | 14.00%
Trademarks and Trade Names [Member] | Maximum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Discount Rate |  |  | 17.50%

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Percentage of assumed long-term growth in revenues, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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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/2003/role/presentationRef -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 + Details
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