Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018
Other Assets, Noncurrent [Abstract]
Pension surplus	$ 2.7	$ 5.3
Long term receivables	1.8	2.2
Long term prepaid expenses and other assets	3.3	4.6
Total	$ 7.8	$ 12.1