Leases - Future Minimum Lease Payments (Details) $ in Millions	Mar. 31, 2020 USD ($)
Operating Leases
2021	$ 14.6
2022	14.6
2023	14.3
2024	11.3
2025	9.0
Thereafter	28.5
Total future minimum lease payments	92.3
Less: Imputed interest	(16.4)
Total lease liabilities	75.9
Finance Lease
2021	2.1
2022	2.0
2023	2.0
2024	2.0
2025	2.0
Thereafter	44.7
Total future minimum lease payments	54.8
Less: Imputed interest	(26.9)
Total lease liabilities	$ 27.9