Leases - Maturity (Details) $ in Millions	Dec. 31, 2019 USD ($)
Undiscounted operating lease liability
Total	$ 141.2
2020	25.0
2021	18.7
2022	11.7
2023	9.7
2024	9.1
Thereafter	67.0
Reduction due to present value
Total	(38.2)
2020	(4.7)
2021	(3.9)
2022	(3.4)
2023	(3.1)
2024	(2.7)
Thereafter	(20.4)
Operating Lease Liability [Abstract]
Total	103.0
2020	20.3
2021	14.8
2022	8.3
2023	6.6
2024	6.4
Thereafter	$ 46.6