Other Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Other Liabilities Disclosure [Abstract]

Schedule of other liabilities

	June 30, 2019		September 30, 2018
		(in millions)
Customer prepayments and deposits	$	5.1	$	3.7
Fair value of hedging instrument		0.5		0.2
Total other liabilities, current		5.6		3.9
Other payables, net of current portion		—		0.5
Asset retirement obligations		0.3		0.4
Senior debt exit premium		4.2		4.2
Total other liabilities, long-term		4.5		5.1
	$	10.1	$	9.0