Leases (Future Minimum Lease Payments) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Operating Leases, After Adoption of 842
2020	$ 36.3	$ 48.3
2021	41.9	40.8
2022	32.2	31.5
2023	24.6	24.1
2024	17.0	16.7
Thereafter	57.2	61.6
Total lease payments	209.2	223.0
Less: imputed interest	(25.9)	(32.1)
Operating lease, liability	183.3	190.9
Finance Leases, After Adoption of 842
2020	3.6	4.8
2021	2.8	2.7
2022	1.2	1.2
2023	1.0	0.9
2024	0.6	0.6
Thereafter	8.5	8.7
Total lease payments	17.7	18.9
Less: imputed interest	(2.2)	(2.4)
Present value of leased liabilities	$ 15.5	$ 16.5