Leases (Maturities of Operating and Financing Lease Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Operating leases
2020 (remainder of year)	$ 87.3
2021	100.5
2022	83.5
2023	71.3
2024	59.3
2025	45.3
Thereafter	164.6
Total payments	611.8
Less: present value discount	(87.0)
Present value of lease payments	524.8	$ 545.1
Current portion	107.9
Noncurrent portion	416.9
Finance leases
2020 (remainder of year)	75.4
2021	99.3
2022	100.1
2023	99.1
2024	56.5
2025	52.1
Thereafter	396.4
Total payments	878.9
Less: present value discount	(298.2)
Present value of lease payments	580.7	$ 617.1
Current portion	65.7
Noncurrent portion	$ 515.0