Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2019

Payables and Accruals [Abstract]

Schedule of accrued expenses

	December 31, 2019		September 30, 2018
	(in millions)
Direct costs of sales	$	5.5	$	4.4
Payroll and related costs		4.4		3.1
Accrued corporate cost expenses		1.6		3.2
Interest payable - cash		5.5		0.1
Asset retirement obligations		2.0		0.5
Acquisition consideration		2.5		—
Contract termination costs		0.1		—
Other creditors		9.6		3.0
	$	31.2	$	14.3