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, 2018
Sep. 30, 2017
Sep. 30, 2016
Other Nonoperating Income (Expense) [Abstract]      
Foreign currency exchange gain (loss), net $ (1.2) $ (1.4) $ 0.3
Other, net 0.6 (2.8) (2.0)
Other (expense) income, net $ (0.6) $ (4.2) $ (1.7)