Goodwill and Other Intangible Assets - Goodwill Narrative (Details) - Aerospace Reporting Unit [Member] - USD ($) $ in Millions	3 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, Impairment Loss		$ 60.2
Goodwill [Member]
Goodwill [Line Items]
Fair Value Inputs, Valuation Method, Weighting Percentage Used, Income-Based Approach	50.00%	50.00%
Fair Value Inputs, Valuation Method, Weighting Percentage Used, Market-Based Approach	50.00%	50.00%
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	15.00%
Measurement Input, Long-term Revenue Growth Rate [Member] \| Goodwill [Member]
Goodwill [Line Items]
Fair value inputs, valuation method, residual growth rate	3.00%	3.00%
Measurement Input, Discount Rate [Member] \| Goodwill [Member]
Goodwill [Line Items]
Fair value inputs, valuation method, discount rate	9.50%	10.30%

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Fair Value Inputs, Valuation Method, Weighting Percentage Used, Market-Based Approach

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Percentage of fair value of reporting unit in excess of carrying amount.

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