Leases Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease, Cost [Abstract]
Operating Lease, Expense	$ 32.9	$ 32.1
Short-term Lease, Expense	6.6	2.1
Variable Lease, Expense	6.4	5.8
Total Lease, Expense	$ 45.9	$ 40.0