Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Operating Leases
Total discounted lease liabilities	$ 298.7	$ 348.6
Finance Leases
Total discounted lease liabilities	43.6	33.3
Total
Total discounted lease liabilities	$ 342.3	$ 381.9