Leases - Future lease obligations (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating leases
2020	$ 31.1
2021	29.8
2022	25.5
2023	23.6
2024	22.4
Thereafter	48.8
Total lease payments	181.2
Less interest	26.9
Total	154.3
Finance leases
2020	0.7
2021	0.1
2022	0.1
Total lease payments	0.9
Total	$ 0.9