Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Operating Leases
2021	$ 9.4
2022	17.7
2023	16.8
2024	6.0
2025	3.4
2026 and thereafter	3.8
Total lease payments	57.1
Less imputed interest	(3.6)
Total lease liabilities	53.5	$ 66.6
Finance Leases
2021	5.4
2022	10.9
2023	5.6
2024	4.6
2025	4.5
2026 and thereafter	9.6
Total lease payments	40.6
Less imputed interest	(8.3)
Total finance lease liabilities	$ 32.3	$ 27.3