Annual report pursuant to Section 13 and 15(d)

Other (Expense) Income, Net (Details)

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Other (Expense) Income, Net (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]      
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions $ (0.4) $ 0.3 $ (2.1)
Foreign currency exchange gain (loss), net (1.4) 0.3 (4.4)
Other, net (2.4) (2.3) (1.4)
Other (expense) income, net $ (4.2) $ (1.7) $ (7.9)