Leases - Maturity of Lease Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Finance Leases
2020	$ 16.8
2021	13.9
2022	11.1
2023	11.1
2024	11.1
Thereafter	37.0
Total minimum lease payments	101.0
Less: effect of discounting	18.2
Present value of future minimum lease payments	82.8
Less: current obligations under leases	12.8	$ 6.5
Long-term lease obligations	70.0	$ 18.4
Operating Leases
2020	299.0
2021	210.7
2022	173.3
2023	159.4
2024	142.5
Thereafter	396.6
Total minimum lease payments	1,381.5
Less: effect of discounting	364.2
Present value of future minimum lease payments	1,017.3
Less: current obligations under leases	230.7
Long-term lease obligations	$ 786.6