Leases Maturities of Financing Lease Liabilities (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019	$ 0.8	[1]
2020	1.1
2021	1.1
2022	1.1
2023	1.1
Thereafter	5.1
Total	10.3
Less: discount	(2.4)
Total finance lease liabilities	$ 7.9

[1] For the nine-month period beginning April 1, 2019.