Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Operating leases
2020	$ 21.7	$ 25.3
2021	15.9	19.1
2022	9.9	13.7
2023	7.6	9.3
2024	5.4	7.3
Thereafter	10.9	18.4
Total	71.4	93.1
Less: Imputed interest	(3.8)
Total lease liabilities	$ 67.6
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseRightOfUseAsset
Finance leases
2020	$ 0.5
2021	0.5	0.1
2022	0.4	0.1
2023	0.2
Total	1.6	$ 0.2
Imputed interest	(0.1)
Total lease liabilities	$ 1.5