Leases - Schedule of Other Information Related to Operating and Finance Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Short-term lease costs	$ 0.6	$ 1.1	$ 1.4	$ 3.3
Operating lease cost	0.7	0.6	1.4	1.3
Operating cash outflows from operating leases	$ 0.7	$ 0.6	$ 1.4	$ 1.4
Weighted average remaining lease term	6 years	5 years 8 months 12 days	6 years	5 years 8 months 12 days
Weighted average discount rate	9.30%	9.40%	9.30%	9.40%
Amortization of finance leases	$ 1.4	$ 1.2	$ 2.8	$ 2.5
Interest on lease liabilities	0.1	0.2	0.3	0.4
Financing cash outflows from finance leases	$ 1.4	$ 1.2	$ 2.6	$ 2.2
Weighted average remaining lease term	1 year 6 months	1 year 9 months 18 days	1 year 6 months	1 year 9 months 18 days
Weighted average discount rate	4.00%	4.50%	4.00%	4.50%