Leases Leases - Summary of the Lease Expense and Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Buildings, equipment and vehicle leases	$ 15.0	$ 15.8
Short-term and variable lease cost	1.2	1.7
Cash paid for amounts included in the measurement of operating lease liabilities	15.3	15.8
Right-of-use asset obtained in exchange for finance lease liability	15.0	11.6
Total lease cost	$ 16.2	$ 17.5