Leases - Maturity (Details) $ in Millions	Mar. 31, 2020 USD ($)
Undiscounted operating lease liability
Total	$ 133.9
2020 (remaining)	16.3
2021	17.0
2022	12.2
2023	10.2
2024	9.5
Thereafter	68.7
Reduction due to present value
Total	(37.5)
2020 (remaining)	(3.5)
2021	(4.0)
2022	(3.6)
2023	(3.2)
2024	(2.8)
Thereafter	(20.4)
Operating Lease Liability [Abstract]
Total	96.4
2020 (remaining)	12.8
2021	13.0
2022	8.6
2023	7.0
2024	6.7
Thereafter	$ 48.3