Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
2020	$ 9.0
2021	23.3
2022	14.0
2023	12.1
2024	4.8
2025 and thereafter	7.2
Total lease payments	70.4
Less imputed interest	(8.9)
Total lease liabilities	61.5	$ 82.4
Finance Leases
2020	0.4
2021	1.4
2022	1.2
2023	0.7
2024	0.7
2025 and thereafter	8.2
Total lease payments	12.6
Less imputed interest	(4.6)
Total finance lease liabilities	$ 8.0	$ 15.2