Goodwill and Other Intangible Assets - Intangibles Narrative (Details) - Trademarks and Trade Names [Member] - Aerospace [Member]	3 Months Ended
	Dec. 31, 2017 Rate
Indefinite-lived Intangible Assets [Line Items]
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%
Measurement Input, Discount Rate [Member]
Indefinite-lived Intangible Assets [Line Items]
Fair value inputs, valuation method, discount rate	9.50%